Source file v5.ml
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# 1 "v5.in.ml"
module type T = sig
module CamlinternalFormatBasics : module type of struct
include Tezos_protocol_environment_sigs_internals.CamlinternalFormatBasics
end
module Pervasives : sig
# 1 "v5/pervasives.mli"
(** The OCaml Standard library.
This module is automatically opened at the beginning of each
compilation. All components of this module can therefore be
referred by their short name, without prefixing them by [Stdlib].
It particular, it provides the basic operations over the built-in
types (numbers, booleans, byte sequences, strings, exceptions,
references, lists, arrays, input-output channels, ...) and the
{{!modules}standard library modules}.
*)
(** {1 Exceptions} *)
external raise : exn -> 'a = "%raise"
(** Raise the given exception value *)
external raise_notrace : exn -> 'a = "%raise_notrace"
(** A faster version [raise] which does not record the backtrace.
@since 4.02.0
*)
val invalid_arg : string -> 'a
(** Raise exception [Invalid_argument] with the given string. *)
val failwith : string -> 'a
(** Raise exception [Failure] with the given string. *)
exception Exit
(** The [Exit] exception is not raised by any library function. It is
provided for use in your programs. *)
(** {1 Boolean operations} *)
external not : bool -> bool = "%boolnot"
(** The boolean negation. *)
external ( && ) : bool -> bool -> bool = "%sequand"
(** The boolean 'and'. Evaluation is sequential, left-to-right:
in [e1 && e2], [e1] is evaluated first, and if it returns [false],
[e2] is not evaluated at all.
Right-associative operator, see {!Ocaml_operators} for more information.
*)
external ( || ) : bool -> bool -> bool = "%sequor"
(** The boolean 'or'. Evaluation is sequential, left-to-right:
in [e1 || e2], [e1] is evaluated first, and if it returns [true],
[e2] is not evaluated at all.
Right-associative operator, see {!Ocaml_operators} for more information.
*)
(** {1 Debugging} *)
external __LOC__ : string = "%loc_LOC"
(** [__LOC__] returns the location at which this expression appears in
the file currently being parsed by the compiler, with the standard
error format of OCaml: "File %S, line %d, characters %d-%d".
@since 4.02.0
*)
external __FILE__ : string = "%loc_FILE"
(** [__FILE__] returns the name of the file currently being
parsed by the compiler.
@since 4.02.0
*)
external __LINE__ : int = "%loc_LINE"
(** [__LINE__] returns the line number at which this expression
appears in the file currently being parsed by the compiler.
@since 4.02.0
*)
external __MODULE__ : string = "%loc_MODULE"
(** [__MODULE__] returns the module name of the file being
parsed by the compiler.
@since 4.02.0
*)
external __POS__ : string * int * int * int = "%loc_POS"
(** [__POS__] returns a tuple [(file,lnum,cnum,enum)], corresponding
to the location at which this expression appears in the file
currently being parsed by the compiler. [file] is the current
filename, [lnum] the line number, [cnum] the character position in
the line and [enum] the last character position in the line.
@since 4.02.0
*)
external __LOC_OF__ : 'a -> string * 'a = "%loc_LOC"
(** [__LOC_OF__ expr] returns a pair [(loc, expr)] where [loc] is the
location of [expr] in the file currently being parsed by the
compiler, with the standard error format of OCaml: "File %S, line
%d, characters %d-%d".
@since 4.02.0
*)
external __LINE_OF__ : 'a -> int * 'a = "%loc_LINE"
(** [__LINE_OF__ expr] returns a pair [(line, expr)], where [line] is the
line number at which the expression [expr] appears in the file
currently being parsed by the compiler.
@since 4.02.0
*)
external __POS_OF__ : 'a -> (string * int * int * int) * 'a = "%loc_POS"
(** [__POS_OF__ expr] returns a pair [(loc,expr)], where [loc] is a
tuple [(file,lnum,cnum,enum)] corresponding to the location at
which the expression [expr] appears in the file currently being
parsed by the compiler. [file] is the current filename, [lnum] the
line number, [cnum] the character position in the line and [enum]
the last character position in the line.
@since 4.02.0
*)
(** {1 Composition operators} *)
external ( |> ) : 'a -> ('a -> 'b) -> 'b = "%revapply"
(** Reverse-application operator: [x |> f |> g] is exactly equivalent
to [g (f (x))].
Left-associative operator, see {!Ocaml_operators} for more information.
@since 4.01
*)
external ( @@ ) : ('a -> 'b) -> 'a -> 'b = "%apply"
(** Application operator: [g @@ f @@ x] is exactly equivalent to
[g (f (x))].
Right-associative operator, see {!Ocaml_operators} for more information.
@since 4.01
*)
(** {1 Integer arithmetic} *)
(** Integers are [Sys.int_size] bits wide.
All operations are taken modulo 2{^[Sys.int_size]}.
They do not fail on overflow. *)
external ( ~- ) : int -> int = "%negint"
(** Unary negation. You can also write [- e] instead of [~- e].
Unary operator, see {!Ocaml_operators} for more information.
*)
external ( ~+ ) : int -> int = "%identity"
(** Unary addition. You can also write [+ e] instead of [~+ e].
Unary operator, see {!Ocaml_operators} for more information.
@since 3.12.0
*)
external succ : int -> int = "%succint"
(** [succ x] is [x + 1]. *)
external pred : int -> int = "%predint"
(** [pred x] is [x - 1]. *)
external ( + ) : int -> int -> int = "%addint"
(** Integer addition.
Left-associative operator, see {!Ocaml_operators} for more information.
*)
external ( - ) : int -> int -> int = "%subint"
(** Integer subtraction.
Left-associative operator, , see {!Ocaml_operators} for more information.
*)
external ( * ) : int -> int -> int = "%mulint"
(** Integer multiplication.
Left-associative operator, see {!Ocaml_operators} for more information.
*)
external ( / ) : int -> int -> int = "%divint"
(** Integer division.
Raise [Division_by_zero] if the second argument is 0.
Integer division rounds the real quotient of its arguments towards zero.
More precisely, if [x >= 0] and [y > 0], [x / y] is the greatest integer
less than or equal to the real quotient of [x] by [y]. Moreover,
[(- x) / y = x / (- y) = - (x / y)].
Left-associative operator, see {!Ocaml_operators} for more information.
*)
external ( mod ) : int -> int -> int = "%modint"
(** Integer remainder. If [y] is not zero, the result
of [x mod y] satisfies the following properties:
[x = (x / y) * y + x mod y] and
[abs(x mod y) <= abs(y) - 1].
If [y = 0], [x mod y] raises [Division_by_zero].
Note that [x mod y] is negative only if [x < 0].
Raise [Division_by_zero] if [y] is zero.
Left-associative operator, see {!Ocaml_operators} for more information.
*)
val abs : int -> int
(** Return the absolute value of the argument. Note that this may be
negative if the argument is [min_int]. *)
val max_int : int
(** The greatest representable integer. *)
val min_int : int
(** The smallest representable integer. *)
(** {2 Bitwise operations} *)
external ( land ) : int -> int -> int = "%andint"
(** Bitwise logical and.
Left-associative operator, see {!Ocaml_operators} for more information.
*)
external ( lor ) : int -> int -> int = "%orint"
(** Bitwise logical or.
Left-associative operator, see {!Ocaml_operators} for more information.
*)
external ( lxor ) : int -> int -> int = "%xorint"
(** Bitwise logical exclusive or.
Left-associative operator, see {!Ocaml_operators} for more information.
*)
val lnot : int -> int
(** Bitwise logical negation. *)
external ( lsl ) : int -> int -> int = "%lslint"
(** [n lsl m] shifts [n] to the left by [m] bits.
The result is unspecified if [m < 0] or [m > Sys.int_size].
Right-associative operator, see {!Ocaml_operators} for more information.
*)
external ( lsr ) : int -> int -> int = "%lsrint"
(** [n lsr m] shifts [n] to the right by [m] bits.
This is a logical shift: zeroes are inserted regardless of
the sign of [n].
The result is unspecified if [m < 0] or [m > Sys.int_size].
Right-associative operator, see {!Ocaml_operators} for more information.
*)
external ( asr ) : int -> int -> int = "%asrint"
(** [n asr m] shifts [n] to the right by [m] bits.
This is an arithmetic shift: the sign bit of [n] is replicated.
The result is unspecified if [m < 0] or [m > Sys.int_size].
Right-associative operator, see {!Ocaml_operators} for more information.
*)
(** {1 String operations}
More string operations are provided in module {!String}.
*)
val ( ^ ) : string -> string -> string
(** String concatenation.
Right-associative operator, see {!Ocaml_operators} for more information.
*)
(** {1 Character operations}
More character operations are provided in module {!Char}.
*)
external int_of_char : char -> int = "%identity"
(** Return the ASCII code of the argument. *)
val char_of_int : int -> char
(** Return the character with the given ASCII code.
Raise [Invalid_argument "char_of_int"] if the argument is
outside the range 0--255. *)
(** {1 Unit operations} *)
external ignore : 'a -> unit = "%ignore"
(** Discard the value of its argument and return [()].
For instance, [ignore(f x)] discards the result of
the side-effecting function [f]. It is equivalent to
[f x; ()], except that the latter may generate a
compiler warning; writing [ignore(f x)] instead
avoids the warning. *)
(** {1 String conversion functions} *)
val string_of_bool : bool -> string
(** Return the string representation of a boolean. As the returned values
may be shared, the user should not modify them directly.
*)
val bool_of_string_opt: string -> bool option
(** Convert the given string to a boolean.
Return [None] if the string is not ["true"] or ["false"].
@since 4.05
*)
val string_of_int : int -> string
(** Return the string representation of an integer, in decimal. *)
val int_of_string_opt: string -> int option
(** Convert the given string to an integer.
The string is read in decimal (by default, or if the string
begins with [0u]), in hexadecimal (if it begins with [0x] or
[0X]), in octal (if it begins with [0o] or [0O]), or in binary
(if it begins with [0b] or [0B]).
The [0u] prefix reads the input as an unsigned integer in the range
[[0, 2*max_int+1]]. If the input exceeds {!max_int}
it is converted to the signed integer
[min_int + input - max_int - 1].
The [_] (underscore) character can appear anywhere in the string
and is ignored.
Return [None] if the given string is not a valid representation of an
integer, or if the integer represented exceeds the range of integers
representable in type [int].
@since 4.05
*)
(** {1 Pair operations} *)
external fst : 'a * 'b -> 'a = "%field0"
(** Return the first component of a pair. *)
external snd : 'a * 'b -> 'b = "%field1"
(** Return the second component of a pair. *)
(** {1 List operations}
More list operations are provided in module {!List}.
*)
val ( @ ) : 'a list -> 'a list -> 'a list
(** List concatenation. Not tail-recursive (length of the first argument).
Right-associative operator, see {!Ocaml_operators} for more information.
*)
(** {1 References} *)
type 'a ref = { mutable contents : 'a }
(** The type of references (mutable indirection cells) containing
a value of type ['a]. *)
external ref : 'a -> 'a ref = "%makemutable"
(** Return a fresh reference containing the given value. *)
external ( ! ) : 'a ref -> 'a = "%field0"
(** [!r] returns the current contents of reference [r].
Equivalent to [fun r -> r.contents].
Unary operator, see {!Ocaml_operators} for more information.
*)
external ( := ) : 'a ref -> 'a -> unit = "%setfield0"
(** [r := a] stores the value of [a] in reference [r].
Equivalent to [fun r v -> r.contents <- v].
Right-associative operator, see {!Ocaml_operators} for more information.
*)
external incr : int ref -> unit = "%incr"
(** Increment the integer contained in the given reference.
Equivalent to [fun r -> r := succ !r]. *)
external decr : int ref -> unit = "%decr"
(** Decrement the integer contained in the given reference.
Equivalent to [fun r -> r := pred !r]. *)
(** {1 Result type} *)
(** @since 4.03.0 *)
type ('a,'b) result = Ok of 'a | Error of 'b
(** {1 Operations on format strings} *)
(** Format strings are character strings with special lexical conventions
that defines the functionality of formatted input/output functions. Format
strings are used to read data with formatted input functions from module
{!Scanf} and to print data with formatted output functions from modules
{!Printf} and {!Format}.
Format strings are made of three kinds of entities:
- {e conversions specifications}, introduced by the special character ['%']
followed by one or more characters specifying what kind of argument to
read or print,
- {e formatting indications}, introduced by the special character ['@']
followed by one or more characters specifying how to read or print the
argument,
- {e plain characters} that are regular characters with usual lexical
conventions. Plain characters specify string literals to be read in the
input or printed in the output.
There is an additional lexical rule to escape the special characters ['%']
and ['@'] in format strings: if a special character follows a ['%']
character, it is treated as a plain character. In other words, ["%%"] is
considered as a plain ['%'] and ["%@"] as a plain ['@'].
For more information about conversion specifications and formatting
indications available, read the documentation of modules {!Scanf},
{!Printf} and {!Format}.
*)
(** Format strings have a general and highly polymorphic type
[('a, 'b, 'c, 'd, 'e, 'f) format6].
The two simplified types, [format] and [format4] below are
included for backward compatibility with earlier releases of
OCaml.
The meaning of format string type parameters is as follows:
- ['a] is the type of the parameters of the format for formatted output
functions ([printf]-style functions);
['a] is the type of the values read by the format for formatted input
functions ([scanf]-style functions).
- ['b] is the type of input source for formatted input functions and the
type of output target for formatted output functions.
For [printf]-style functions from module {!Printf}, ['b] is typically
[out_channel];
for [printf]-style functions from module {!Format}, ['b] is typically
{!Format.formatter};
for [scanf]-style functions from module {!Scanf}, ['b] is typically
{!Scanf.Scanning.in_channel}.
Type argument ['b] is also the type of the first argument given to
user's defined printing functions for [%a] and [%t] conversions,
and user's defined reading functions for [%r] conversion.
- ['c] is the type of the result of the [%a] and [%t] printing
functions, and also the type of the argument transmitted to the
first argument of [kprintf]-style functions or to the
[kscanf]-style functions.
- ['d] is the type of parameters for the [scanf]-style functions.
- ['e] is the type of the receiver function for the [scanf]-style functions.
- ['f] is the final result type of a formatted input/output function
invocation: for the [printf]-style functions, it is typically [unit];
for the [scanf]-style functions, it is typically the result type of the
receiver function.
*)
type ('a, 'b, 'c, 'd, 'e, 'f) format6 =
('a, 'b, 'c, 'd, 'e, 'f) CamlinternalFormatBasics.format6
type ('a, 'b, 'c, 'd) format4 = ('a, 'b, 'c, 'c, 'c, 'd) format6
type ('a, 'b, 'c) format = ('a, 'b, 'c, 'c) format4
val string_of_format : ('a, 'b, 'c, 'd, 'e, 'f) format6 -> string
(** Converts a format string into a string. *)
external format_of_string :
('a, 'b, 'c, 'd, 'e, 'f) format6 ->
('a, 'b, 'c, 'd, 'e, 'f) format6 = "%identity"
(** [format_of_string s] returns a format string read from the string
literal [s].
Note: [format_of_string] can not convert a string argument that is not a
literal. If you need this functionality, use the more general
{!Scanf.format_from_string} function.
*)
val ( ^^ ) :
('a, 'b, 'c, 'd, 'e, 'f) format6 ->
('f, 'b, 'c, 'e, 'g, 'h) format6 ->
('a, 'b, 'c, 'd, 'g, 'h) format6
(** [f1 ^^ f2] catenates format strings [f1] and [f2]. The result is a
format string that behaves as the concatenation of format strings [f1] and
[f2]: in case of formatted output, it accepts arguments from [f1], then
arguments from [f2]; in case of formatted input, it returns results from
[f1], then results from [f2].
Right-associative operator, see {!Ocaml_operators} for more information.
*)
end
# 6 "v5.in.ml"
open Pervasives
module Either : sig
# 1 "v5/either.mli"
(** Either type.
Either is the simplest and most generic sum/variant type:
a value of [('a, 'b) Either.t] is either a [Left (v : 'a)]
or a [Right (v : 'b)].
It is a natural choice in the API of generic functions where values
could fall in two different cases, possibly at different types,
without assigning a specific meaning to what each case should be.
For example:
{[List.partition_map:
('a -> ('b, 'c) Either.t) -> 'a list -> 'b list * 'c list]}
If you are looking for a parametrized type where
one alternative means success and the other means failure,
you should use the more specific type {!Result.t}.
@since 4.12
*)
type ('a, 'b) t = Left of 'a | Right of 'b (**)
(** A value of [('a, 'b) Either.t] contains
either a value of ['a] or a value of ['b] *)
val equal :
left:('a -> 'a -> bool) -> right:('b -> 'b -> bool) ->
('a, 'b) t -> ('a, 'b) t -> bool
(** [equal ~left ~right e0 e1] tests equality of [e0] and [e1] using [left]
and [right] to respectively compare values wrapped by [Left _] and
[Right _]. *)
val compare :
left:('a -> 'a -> int) -> right:('b -> 'b -> int) ->
('a, 'b) t -> ('a, 'b) t -> int
(** [compare ~left ~right e0 e1] totally orders [e0] and [e1] using [left] and
[right] to respectively compare values wrapped by [Left _ ] and [Right _].
[Left _] values are smaller than [Right _] values. *)
end
# 10 "v5.in.ml"
module String : sig
# 1 "v5/string.mli"
(** String operations.
A string is an immutable data structure that contains a
fixed-length sequence of (single-byte) characters. Each character
can be accessed in constant time through its index.
Given a string [s] of length [l], we can access each of the [l]
characters of [s] via its index in the sequence. Indexes start at
[0], and we will call an index valid in [s] if it falls within the
range [[0...l-1]] (inclusive). A position is the point between two
characters or at the beginning or end of the string. We call a
position valid in [s] if it falls within the range [[0...l]]
(inclusive). Note that the character at index [n] is between
positions [n] and [n+1].
Two parameters [start] and [len] are said to designate a valid
substring of [s] if [len >= 0] and [start] and [start+len] are
valid positions in [s].
Note: OCaml strings used to be modifiable in place, for instance via
the {!String.set} and {!String.blit} functions described below. This
usage is only possible when the compiler is put in "unsafe-string"
mode by giving the [-unsafe-string] command-line option. This
compatibility mode makes the types [string] and [bytes] (see module
{!Bytes}) interchangeable so that functions expecting byte sequences
can also accept strings as arguments and modify them.
The distinction between [bytes] and [string] was introduced in OCaml
4.02, and the "unsafe-string" compatibility mode was the default
until OCaml 4.05. Starting with 4.06, the compatibility mode is
opt-in; we intend to remove the option in the future.
*)
external length : string -> int = "%string_length"
(** Return the length (number of characters) of the given string. *)
external get : string -> int -> char = "%string_safe_get"
(** [String.get s n] returns the character at index [n] in string [s].
You can also write [s.[n]] instead of [String.get s n].
Raise [Invalid_argument] if [n] not a valid index in [s]. *)
val make : int -> char -> string
(** [String.make n c] returns a fresh string of length [n],
filled with the character [c].
Raise [Invalid_argument] if [n < 0] or [n > ]{!Sys.max_string_length}. *)
val init : int -> (int -> char) -> string
(** [String.init n f] returns a string of length [n], with character
[i] initialized to the result of [f i] (called in increasing
index order).
Raise [Invalid_argument] if [n < 0] or [n > ]{!Sys.max_string_length}.
@since 4.02.0
*)
val sub : string -> int -> int -> string
(** [String.sub s start len] returns a fresh string of length [len],
containing the substring of [s] that starts at position [start] and
has length [len].
Raise [Invalid_argument] if [start] and [len] do not
designate a valid substring of [s]. *)
val blit : string -> int -> bytes -> int -> int -> unit
(** Same as {!Bytes.blit_string}. *)
val concat : string -> string list -> string
(** [String.concat sep sl] concatenates the list of strings [sl],
inserting the separator string [sep] between each.
Raise [Invalid_argument] if the result is longer than
{!Sys.max_string_length} bytes. *)
val iter : (char -> unit) -> string -> unit
(** [String.iter f s] applies function [f] in turn to all
the characters of [s]. It is equivalent to
[f s.[0]; f s.[1]; ...; f s.[String.length s - 1]; ()]. *)
val iteri : (int -> char -> unit) -> string -> unit
(** Same as {!String.iter}, but the
function is applied to the index of the element as first argument
(counting from 0), and the character itself as second argument.
@since 4.00.0 *)
val map : (char -> char) -> string -> string
(** [String.map f s] applies function [f] in turn to all the
characters of [s] (in increasing index order) and stores the
results in a new string that is returned.
@since 4.00.0 *)
val mapi : (int -> char -> char) -> string -> string
(** [String.mapi f s] calls [f] with each character of [s] and its
index (in increasing index order) and stores the results in a new
string that is returned.
@since 4.02.0 *)
val trim : string -> string
(** Return a copy of the argument, without leading and trailing
whitespace. The characters regarded as whitespace are: [' '],
['\012'], ['\n'], ['\r'], and ['\t']. If there is neither leading nor
trailing whitespace character in the argument, return the original
string itself, not a copy.
@since 4.00.0 *)
val escaped : string -> string
(** Return a copy of the argument, with special characters
represented by escape sequences, following the lexical
conventions of OCaml.
All characters outside the ASCII printable range (32..126) are
escaped, as well as backslash and double-quote.
If there is no special character in the argument that needs
escaping, return the original string itself, not a copy.
Raise [Invalid_argument] if the result is longer than
{!Sys.max_string_length} bytes.
The function {!Scanf.unescaped} is a left inverse of [escaped],
i.e. [Scanf.unescaped (escaped s) = s] for any string [s] (unless
[escape s] fails). *)
val index_opt: string -> char -> int option
(** [String.index_opt s c] returns the index of the first
occurrence of character [c] in string [s], or
[None] if [c] does not occur in [s].
@since 4.05 *)
val rindex_opt: string -> char -> int option
(** [String.rindex_opt s c] returns the index of the last occurrence
of character [c] in string [s], or [None] if [c] does not occur in
[s].
@since 4.05 *)
val index_from_opt: string -> int -> char -> int option
(** [String.index_from_opt s i c] returns the index of the
first occurrence of character [c] in string [s] after position [i]
or [None] if [c] does not occur in [s] after position [i].
[String.index_opt s c] is equivalent to [String.index_from_opt s 0 c].
Raise [Invalid_argument] if [i] is not a valid position in [s].
@since 4.05
*)
val rindex_from_opt: string -> int -> char -> int option
(** [String.rindex_from_opt s i c] returns the index of the
last occurrence of character [c] in string [s] before position [i+1]
or [None] if [c] does not occur in [s] before position [i+1].
[String.rindex_opt s c] is equivalent to
[String.rindex_from_opt s (String.length s - 1) c].
Raise [Invalid_argument] if [i+1] is not a valid position in [s].
@since 4.05
*)
val contains : string -> char -> bool
(** [String.contains s c] tests if character [c]
appears in the string [s]. *)
val contains_from : string -> int -> char -> bool
(** [String.contains_from s start c] tests if character [c]
appears in [s] after position [start].
[String.contains s c] is equivalent to
[String.contains_from s 0 c].
Raise [Invalid_argument] if [start] is not a valid position in [s]. *)
val rcontains_from : string -> int -> char -> bool
(** [String.rcontains_from s stop c] tests if character [c]
appears in [s] before position [stop+1].
Raise [Invalid_argument] if [stop < 0] or [stop+1] is not a valid
position in [s]. *)
val uppercase_ascii : string -> string
(** Return a copy of the argument, with all lowercase letters
translated to uppercase, using the US-ASCII character set.
@since 4.03.0 *)
val lowercase_ascii : string -> string
(** Return a copy of the argument, with all uppercase letters
translated to lowercase, using the US-ASCII character set.
@since 4.03.0 *)
val capitalize_ascii : string -> string
(** Return a copy of the argument, with the first character set to uppercase,
using the US-ASCII character set.
@since 4.03.0 *)
val uncapitalize_ascii : string -> string
(** Return a copy of the argument, with the first character set to lowercase,
using the US-ASCII character set.
@since 4.03.0 *)
type t = string
(** An alias for the type of strings. *)
val compare: t -> t -> int
(** The comparison function for strings, with the same specification as
{!Stdlib.compare}. Along with the type [t], this function [compare]
allows the module [String] to be passed as argument to the functors
{!Set.Make} and {!Map.Make}. *)
val equal: t -> t -> bool
(** The equal function for strings.
@since 4.03.0 *)
val split_on_char: char -> string -> string list
(** [String.split_on_char sep s] returns the list of all (possibly empty)
substrings of [s] that are delimited by the [sep] character.
The function's output is specified by the following invariants:
- The list is not empty.
- Concatenating its elements using [sep] as a separator returns a
string equal to the input ([String.concat (String.make 1 sep)
(String.split_on_char sep s) = s]).
- No string in the result contains the [sep] character.
@since 4.04.0
*)
end
# 12 "v5.in.ml"
module Char : sig
# 1 "v5/char.mli"
(** Character operations. *)
external code : char -> int = "%identity"
(** Return the ASCII code of the argument. *)
val chr : int -> char
(** Return the character with the given ASCII code.
@raise Invalid_argument if the argument is
outside the range 0--255. *)
val escaped : char -> string
(** Return a string representing the given character,
with special characters escaped following the lexical conventions
of OCaml.
All characters outside the ASCII printable range (32..126) are
escaped, as well as backslash, double-quote, and single-quote. *)
val lowercase_ascii : char -> char
(** Convert the given character to its equivalent lowercase character,
using the US-ASCII character set.
@since 4.03.0 *)
val uppercase_ascii : char -> char
(** Convert the given character to its equivalent uppercase character,
using the US-ASCII character set.
@since 4.03.0 *)
type t = char
(** An alias for the type of characters. *)
val compare: t -> t -> int
(** The comparison function for characters, with the same specification as
{!Stdlib.compare}. Along with the type [t], this function [compare]
allows the module [Char] to be passed as argument to the functors
{!Set.Make} and {!Map.Make}. *)
val equal: t -> t -> bool
(** The equal function for chars.
@since 4.03.0 *)
end
# 14 "v5.in.ml"
module Bytes : sig
# 1 "v5/bytes.mli"
(** Byte sequence operations.
A byte sequence is a mutable data structure that contains a
fixed-length sequence of bytes. Each byte can be indexed in
constant time for reading or writing.
Given a byte sequence [s] of length [l], we can access each of the
[l] bytes of [s] via its index in the sequence. Indexes start at
[0], and we will call an index valid in [s] if it falls within the
range [[0...l-1]] (inclusive). A position is the point between two
bytes or at the beginning or end of the sequence. We call a
position valid in [s] if it falls within the range [[0...l]]
(inclusive). Note that the byte at index [n] is between positions
[n] and [n+1].
Two parameters [start] and [len] are said to designate a valid
range of [s] if [len >= 0] and [start] and [start+len] are valid
positions in [s].
Byte sequences can be modified in place, for instance via the [set]
and [blit] functions described below. See also strings (module
{!String}), which are almost the same data structure, but cannot be
modified in place.
Bytes are represented by the OCaml type [char].
The labeled version of this module can be used as described in the
{!StdLabels} module.
@since 4.02.0
*)
external length : bytes -> int = "%bytes_length"
(** Return the length (number of bytes) of the argument. *)
external get : bytes -> int -> char = "%bytes_safe_get"
(** [get s n] returns the byte at index [n] in argument [s].
@raise Invalid_argument if [n] is not a valid index in [s]. *)
external set : bytes -> int -> char -> unit = "%bytes_safe_set"
(** [set s n c] modifies [s] in place, replacing the byte at index [n]
with [c].
@raise Invalid_argument if [n] is not a valid index in [s]. *)
val make : int -> char -> bytes
(** [make n c] returns a new byte sequence of length [n], filled with
the byte [c].
@raise Invalid_argument if [n < 0] or [n > ]{!Sys.max_string_length}. *)
val init : int -> (int -> char) -> bytes
(** [init n f] returns a fresh byte sequence of length [n],
with character [i] initialized to the result of [f i] (in increasing
index order).
@raise Invalid_argument if [n < 0] or [n > ]{!Sys.max_string_length}. *)
val empty : bytes
(** A byte sequence of size 0. *)
val copy : bytes -> bytes
(** Return a new byte sequence that contains the same bytes as the
argument. *)
val of_string : string -> bytes
(** Return a new byte sequence that contains the same bytes as the
given string. *)
val to_string : bytes -> string
(** Return a new string that contains the same bytes as the given byte
sequence. *)
val sub : bytes -> int -> int -> bytes
(** [sub s pos len] returns a new byte sequence of length [len],
containing the subsequence of [s] that starts at position [pos]
and has length [len].
@raise Invalid_argument if [pos] and [len] do not designate a
valid range of [s]. *)
val sub_string : bytes -> int -> int -> string
(** Same as {!sub} but return a string instead of a byte sequence. *)
val extend : bytes -> int -> int -> bytes
(** [extend s left right] returns a new byte sequence that contains
the bytes of [s], with [left] uninitialized bytes prepended and
[right] uninitialized bytes appended to it. If [left] or [right]
is negative, then bytes are removed (instead of appended) from
the corresponding side of [s].
@raise Invalid_argument if the result length is negative or
longer than {!Sys.max_string_length} bytes.
@since 4.05.0 in BytesLabels *)
val fill : bytes -> int -> int -> char -> unit
(** [fill s pos len c] modifies [s] in place, replacing [len]
characters with [c], starting at [pos].
@raise Invalid_argument if [pos] and [len] do not designate a
valid range of [s]. *)
val blit :
bytes -> int -> bytes -> int -> int
-> unit
(** [blit src src_pos dst dst_pos len] copies [len] bytes from sequence
[src], starting at index [src_pos], to sequence [dst], starting at
index [dst_pos]. It works correctly even if [src] and [dst] are the
same byte sequence, and the source and destination intervals
overlap.
@raise Invalid_argument if [src_pos] and [len] do not
designate a valid range of [src], or if [dst_pos] and [len]
do not designate a valid range of [dst]. *)
val blit_string :
string -> int -> bytes -> int -> int
-> unit
(** [blit src src_pos dst dst_pos len] copies [len] bytes from string
[src], starting at index [src_pos], to byte sequence [dst],
starting at index [dst_pos].
@raise Invalid_argument if [src_pos] and [len] do not
designate a valid range of [src], or if [dst_pos] and [len]
do not designate a valid range of [dst].
@since 4.05.0 in BytesLabels *)
val concat : bytes -> bytes list -> bytes
(** [concat sep sl] concatenates the list of byte sequences [sl],
inserting the separator byte sequence [sep] between each, and
returns the result as a new byte sequence.
@raise Invalid_argument if the result is longer than
{!Sys.max_string_length} bytes.
*)
val cat : bytes -> bytes -> bytes
(** [cat s1 s2] concatenates [s1] and [s2] and returns the result
as a new byte sequence.
@raise Invalid_argument if the result is longer than
{!Sys.max_string_length} bytes.
@since 4.05.0 in BytesLabels *)
val iter : (char -> unit) -> bytes -> unit
(** [iter f s] applies function [f] in turn to all the bytes of [s].
It is equivalent to [f (get s 0); f (get s 1); ...; f (get s
(length s - 1)); ()]. *)
val iteri : (int -> char -> unit) -> bytes -> unit
(** Same as {!iter}, but the function is applied to the index of
the byte as first argument and the byte itself as second
argument. *)
val map : (char -> char) -> bytes -> bytes
(** [map f s] applies function [f] in turn to all the bytes of [s] (in
increasing index order) and stores the resulting bytes in a new sequence
that is returned as the result. *)
val mapi : (int -> char -> char) -> bytes -> bytes
(** [mapi f s] calls [f] with each character of [s] and its
index (in increasing index order) and stores the resulting bytes
in a new sequence that is returned as the result. *)
val trim : bytes -> bytes
(** Return a copy of the argument, without leading and trailing
whitespace. The bytes regarded as whitespace are the ASCII
characters [' '], ['\012'], ['\n'], ['\r'], and ['\t']. *)
val escaped : bytes -> bytes
(** Return a copy of the argument, with special characters represented
by escape sequences, following the lexical conventions of OCaml.
All characters outside the ASCII printable range (32..126) are
escaped, as well as backslash and double-quote.
@raise Invalid_argument if the result is longer than
{!Sys.max_string_length} bytes. *)
val index_opt: bytes -> char -> int option
(** [index_opt s c] returns the index of the first occurrence of byte [c]
in [s] or [None] if [c] does not occur in [s].
@since 4.05 *)
val rindex_opt: bytes -> char -> int option
(** [rindex_opt s c] returns the index of the last occurrence of byte [c]
in [s] or [None] if [c] does not occur in [s].
@since 4.05 *)
val index_from_opt: bytes -> int -> char -> int option
(** [index_from_opt s i c] returns the index of the first occurrence of
byte [c] in [s] after position [i] or [None] if [c] does not occur in [s]
after position [i].
[index_opt s c] is equivalent to [index_from_opt s 0 c].
@raise Invalid_argument if [i] is not a valid position in [s].
@since 4.05 *)
val rindex_from_opt: bytes -> int -> char -> int option
(** [rindex_from_opt s i c] returns the index of the last occurrence
of byte [c] in [s] before position [i+1] or [None] if [c] does not
occur in [s] before position [i+1]. [rindex_opt s c] is equivalent to
[rindex_from s (length s - 1) c].
@raise Invalid_argument if [i+1] is not a valid position in [s].
@since 4.05 *)
val contains : bytes -> char -> bool
(** [contains s c] tests if byte [c] appears in [s]. *)
val contains_from : bytes -> int -> char -> bool
(** [contains_from s start c] tests if byte [c] appears in [s] after
position [start]. [contains s c] is equivalent to [contains_from
s 0 c].
@raise Invalid_argument if [start] is not a valid position in [s]. *)
val rcontains_from : bytes -> int -> char -> bool
(** [rcontains_from s stop c] tests if byte [c] appears in [s] before
position [stop+1].
@raise Invalid_argument if [stop < 0] or [stop+1] is not a valid
position in [s]. *)
val uppercase_ascii : bytes -> bytes
(** Return a copy of the argument, with all lowercase letters
translated to uppercase, using the US-ASCII character set.
@since 4.03.0 (4.05.0 in BytesLabels) *)
val lowercase_ascii : bytes -> bytes
(** Return a copy of the argument, with all uppercase letters
translated to lowercase, using the US-ASCII character set.
@since 4.03.0 (4.05.0 in BytesLabels) *)
val capitalize_ascii : bytes -> bytes
(** Return a copy of the argument, with the first character set to uppercase,
using the US-ASCII character set.
@since 4.03.0 (4.05.0 in BytesLabels) *)
val uncapitalize_ascii : bytes -> bytes
(** Return a copy of the argument, with the first character set to lowercase,
using the US-ASCII character set.
@since 4.03.0 (4.05.0 in BytesLabels) *)
type t = bytes
(** An alias for the type of byte sequences. *)
val compare: t -> t -> int
(** The comparison function for byte sequences, with the same
specification as {!Stdlib.compare}. Along with the type [t],
this function [compare] allows the module [Bytes] to be passed as
argument to the functors {!Set.Make} and {!Map.Make}. *)
val equal: t -> t -> bool
(** The equality function for byte sequences.
@since 4.03.0 (4.05.0 in BytesLabels) *)
end
# 16 "v5.in.ml"
module Int32 : sig
# 1 "v5/int32.mli"
(** 32-bit integers.
This module provides operations on the type [int32]
of signed 32-bit integers. Unlike the built-in [int] type,
the type [int32] is guaranteed to be exactly 32-bit wide on all
platforms. All arithmetic operations over [int32] are taken
modulo 2{^32}.
Performance notice: values of type [int32] occupy more memory
space than values of type [int], and arithmetic operations on
[int32] are generally slower than those on [int]. Use [int32]
only when the application requires exact 32-bit arithmetic.
Literals for 32-bit integers are suffixed by l:
{[
let zero: int32 = 0l
let one: int32 = 1l
let m_one: int32 = -1l
]}
*)
val zero : int32
(** The 32-bit integer 0. *)
val one : int32
(** The 32-bit integer 1. *)
val minus_one : int32
(** The 32-bit integer -1. *)
external neg : int32 -> int32 = "%int32_neg"
(** Unary negation. *)
external add : int32 -> int32 -> int32 = "%int32_add"
(** Addition. *)
external sub : int32 -> int32 -> int32 = "%int32_sub"
(** Subtraction. *)
external mul : int32 -> int32 -> int32 = "%int32_mul"
(** Multiplication. *)
external div : int32 -> int32 -> int32 = "%int32_div"
(** Integer division. This division rounds the real quotient of
its arguments towards zero, as specified for {!Stdlib.(/)}.
@raise Division_by_zero if the second
argument is zero. *)
external rem : int32 -> int32 -> int32 = "%int32_mod"
(** Integer remainder. If [y] is not zero, the result
of [Int32.rem x y] satisfies the following property:
[x = Int32.add (Int32.mul (Int32.div x y) y) (Int32.rem x y)].
If [y = 0], [Int32.rem x y] raises [Division_by_zero]. *)
val succ : int32 -> int32
(** Successor. [Int32.succ x] is [Int32.add x Int32.one]. *)
val pred : int32 -> int32
(** Predecessor. [Int32.pred x] is [Int32.sub x Int32.one]. *)
val abs : int32 -> int32
(** Return the absolute value of its argument. *)
val max_int : int32
(** The greatest representable 32-bit integer, 2{^31} - 1. *)
val min_int : int32
(** The smallest representable 32-bit integer, -2{^31}. *)
external logand : int32 -> int32 -> int32 = "%int32_and"
(** Bitwise logical and. *)
external logor : int32 -> int32 -> int32 = "%int32_or"
(** Bitwise logical or. *)
external logxor : int32 -> int32 -> int32 = "%int32_xor"
(** Bitwise logical exclusive or. *)
val lognot : int32 -> int32
(** Bitwise logical negation. *)
external shift_left : int32 -> int -> int32 = "%int32_lsl"
(** [Int32.shift_left x y] shifts [x] to the left by [y] bits.
The result is unspecified if [y < 0] or [y >= 32]. *)
external shift_right : int32 -> int -> int32 = "%int32_asr"
(** [Int32.shift_right x y] shifts [x] to the right by [y] bits.
This is an arithmetic shift: the sign bit of [x] is replicated
and inserted in the vacated bits.
The result is unspecified if [y < 0] or [y >= 32]. *)
external shift_right_logical : int32 -> int -> int32 = "%int32_lsr"
(** [Int32.shift_right_logical x y] shifts [x] to the right by [y] bits.
This is a logical shift: zeroes are inserted in the vacated bits
regardless of the sign of [x].
The result is unspecified if [y < 0] or [y >= 32]. *)
external of_int : int -> int32 = "%int32_of_int"
(** Convert the given integer (type [int]) to a 32-bit integer
(type [int32]). On 64-bit platforms, the argument is taken
modulo 2{^32}. *)
external to_int : int32 -> int = "%int32_to_int"
(** Convert the given 32-bit integer (type [int32]) to an
integer (type [int]). On 32-bit platforms, the 32-bit integer
is taken modulo 2{^31}, i.e. the high-order bit is lost
during the conversion. On 64-bit platforms, the conversion
is exact. *)
val of_string_opt: string -> int32 option
(** Same as [of_string], but return [None] instead of raising.
@since 4.05 *)
val to_string : int32 -> string
(** Return the string representation of its argument, in signed decimal. *)
type t = int32
(** An alias for the type of 32-bit integers. *)
val compare: t -> t -> int
(** The comparison function for 32-bit integers, with the same specification as
{!Stdlib.compare}. Along with the type [t], this function [compare]
allows the module [Int32] to be passed as argument to the functors
{!Set.Make} and {!Map.Make}. *)
val equal: t -> t -> bool
(** The equal function for int32s.
@since 4.03.0 *)
end
# 18 "v5.in.ml"
module Int64 : sig
# 1 "v5/int64.mli"
(** 64-bit integers.
This module provides operations on the type [int64] of
signed 64-bit integers. Unlike the built-in [int] type,
the type [int64] is guaranteed to be exactly 64-bit wide on all
platforms. All arithmetic operations over [int64] are taken
modulo 2{^64}
Performance notice: values of type [int64] occupy more memory
space than values of type [int], and arithmetic operations on
[int64] are generally slower than those on [int]. Use [int64]
only when the application requires exact 64-bit arithmetic.
Literals for 64-bit integers are suffixed by L:
{[
let zero: int64 = 0L
let one: int64 = 1L
let m_one: int64 = -1L
]}
*)
val zero : int64
(** The 64-bit integer 0. *)
val one : int64
(** The 64-bit integer 1. *)
val minus_one : int64
(** The 64-bit integer -1. *)
external neg : int64 -> int64 = "%int64_neg"
(** Unary negation. *)
external add : int64 -> int64 -> int64 = "%int64_add"
(** Addition. *)
external sub : int64 -> int64 -> int64 = "%int64_sub"
(** Subtraction. *)
external mul : int64 -> int64 -> int64 = "%int64_mul"
(** Multiplication. *)
external div : int64 -> int64 -> int64 = "%int64_div"
(** Integer division.
@raise Division_by_zero if the second
argument is zero. This division rounds the real quotient of
its arguments towards zero, as specified for {!Stdlib.(/)}. *)
external rem : int64 -> int64 -> int64 = "%int64_mod"
(** Integer remainder. If [y] is not zero, the result
of [Int64.rem x y] satisfies the following property:
[x = Int64.add (Int64.mul (Int64.div x y) y) (Int64.rem x y)].
If [y = 0], [Int64.rem x y] raises [Division_by_zero]. *)
val succ : int64 -> int64
(** Successor. [Int64.succ x] is [Int64.add x Int64.one]. *)
val pred : int64 -> int64
(** Predecessor. [Int64.pred x] is [Int64.sub x Int64.one]. *)
val abs : int64 -> int64
(** Return the absolute value of its argument. *)
val max_int : int64
(** The greatest representable 64-bit integer, 2{^63} - 1. *)
val min_int : int64
(** The smallest representable 64-bit integer, -2{^63}. *)
external logand : int64 -> int64 -> int64 = "%int64_and"
(** Bitwise logical and. *)
external logor : int64 -> int64 -> int64 = "%int64_or"
(** Bitwise logical or. *)
external logxor : int64 -> int64 -> int64 = "%int64_xor"
(** Bitwise logical exclusive or. *)
val lognot : int64 -> int64
(** Bitwise logical negation. *)
external shift_left : int64 -> int -> int64 = "%int64_lsl"
(** [Int64.shift_left x y] shifts [x] to the left by [y] bits.
The result is unspecified if [y < 0] or [y >= 64]. *)
external shift_right : int64 -> int -> int64 = "%int64_asr"
(** [Int64.shift_right x y] shifts [x] to the right by [y] bits.
This is an arithmetic shift: the sign bit of [x] is replicated
and inserted in the vacated bits.
The result is unspecified if [y < 0] or [y >= 64]. *)
external shift_right_logical : int64 -> int -> int64 = "%int64_lsr"
(** [Int64.shift_right_logical x y] shifts [x] to the right by [y] bits.
This is a logical shift: zeroes are inserted in the vacated bits
regardless of the sign of [x].
The result is unspecified if [y < 0] or [y >= 64]. *)
external of_int : int -> int64 = "%int64_of_int"
(** Convert the given integer (type [int]) to a 64-bit integer
(type [int64]). *)
external to_int : int64 -> int = "%int64_to_int"
(** Convert the given 64-bit integer (type [int64]) to an
integer (type [int]). On 64-bit platforms, the 64-bit integer
is taken modulo 2{^63}, i.e. the high-order bit is lost
during the conversion. On 32-bit platforms, the 64-bit integer
is taken modulo 2{^31}, i.e. the top 33 bits are lost
during the conversion. *)
external of_int32 : int32 -> int64 = "%int64_of_int32"
(** Convert the given 32-bit integer (type [int32])
to a 64-bit integer (type [int64]). *)
external to_int32 : int64 -> int32 = "%int64_to_int32"
(** Convert the given 64-bit integer (type [int64]) to a
32-bit integer (type [int32]). The 64-bit integer
is taken modulo 2{^32}, i.e. the top 32 bits are lost
during the conversion. *)
val of_string_opt: string -> int64 option
(** Same as [of_string], but return [None] instead of raising.
@since 4.05 *)
val to_string : int64 -> string
(** Return the string representation of its argument, in decimal. *)
type t = int64
(** An alias for the type of 64-bit integers. *)
val compare: t -> t -> int
(** The comparison function for 64-bit integers, with the same specification as
{!Stdlib.compare}. Along with the type [t], this function [compare]
allows the module [Int64] to be passed as argument to the functors
{!Set.Make} and {!Map.Make}. *)
val equal: t -> t -> bool
(** The equal function for int64s.
@since 4.03.0 *)
end
# 20 "v5.in.ml"
module Format : sig
# 1 "v5/format.mli"
(** Pretty-printing.
This module implements a pretty-printing facility to format values
within {{!boxes}'pretty-printing boxes'} and {{!tags}'semantic tags'}
combined with a set of {{!fpp}printf-like functions}.
The pretty-printer splits lines at specified {{!breaks}break hints},
and indents lines according to the box structure.
Similarly, {{!tags}semantic tags} can be used to decouple text
presentation from its contents.
This pretty-printing facility is implemented as an overlay on top of
abstract {{!section:formatter}formatters} which provide basic output
functions.
Some formatters are predefined, notably:
- {!std_formatter} outputs to {{!Stdlib.stdout}stdout}
- {!err_formatter} outputs to {{!Stdlib.stderr}stderr}
Most functions in the {!Format} module come in two variants:
a short version that operates on {!std_formatter} and the
generic version prefixed by [pp_] that takes a formatter
as its first argument.
More formatters can be created with {!formatter_of_out_channel},
{!formatter_of_buffer}, {!formatter_of_symbolic_output_buffer}
or using {{!section:formatter}custom formatters}.
*)
(** {1 Introduction}
For a gentle introduction to the basics of pretty-printing using
[Format], read
{{:http://caml.inria.fr/resources/doc/guides/format.en.html}
http://caml.inria.fr/resources/doc/guides/format.en.html}.
You may consider this module as providing an extension to the
[printf] facility to provide automatic line splitting. The addition of
pretty-printing annotations to your regular [printf] format strings gives
you fancy indentation and line breaks.
Pretty-printing annotations are described below in the documentation of
the function {!Format.fprintf}.
You may also use the explicit pretty-printing box management and printing
functions provided by this module. This style is more basic but more
verbose than the concise [fprintf] format strings.
For instance, the sequence
[open_box 0; print_string "x ="; print_space ();
print_int 1; close_box (); print_newline ()]
that prints [x = 1] within a pretty-printing box, can be
abbreviated as [printf "@[%s@ %i@]@." "x =" 1], or even shorter
[printf "@[x =@ %i@]@." 1].
Rule of thumb for casual users of this library:
- use simple pretty-printing boxes (as obtained by [open_box 0]);
- use simple break hints as obtained by [print_cut ()] that outputs a
simple break hint, or by [print_space ()] that outputs a space
indicating a break hint;
- once a pretty-printing box is open, display its material with basic
printing functions (e. g. [print_int] and [print_string]);
- when the material for a pretty-printing box has been printed, call
[close_box ()] to close the box;
- at the end of pretty-printing, flush the pretty-printer to display all
the remaining material, e.g. evaluate [print_newline ()].
The behavior of pretty-printing commands is unspecified
if there is no open pretty-printing box. Each box opened by
one of the [open_] functions below must be closed using [close_box]
for proper formatting. Otherwise, some of the material printed in the
boxes may not be output, or may be formatted incorrectly.
In case of interactive use, each phrase is executed in the initial state
of the standard pretty-printer: after each phrase execution, the
interactive system closes all open pretty-printing boxes, flushes all
pending text, and resets the standard pretty-printer.
Warning: mixing calls to pretty-printing functions of this module with
calls to {!Stdlib} low level output functions is error prone.
The pretty-printing functions output material that is delayed in the
pretty-printer queue and stacks in order to compute proper line
splitting. In contrast, basic I/O output functions write directly in
their output device. As a consequence, the output of a basic I/O function
may appear before the output of a pretty-printing function that has been
called before. For instance,
[
Stdlib.print_string "<";
Format.print_string "PRETTY";
Stdlib.print_string ">";
Format.print_string "TEXT";
]
leads to output [<>PRETTYTEXT].
*)
type formatter
(** Abstract data corresponding to a pretty-printer (also called a
formatter) and all its machinery. See also {!section:formatter}. *)
(** {1:boxes Pretty-printing boxes} *)
(** The pretty-printing engine uses the concepts of pretty-printing box and
break hint to drive indentation and line splitting behavior of the
pretty-printer.
Each different pretty-printing box kind introduces a specific line splitting
policy:
- within an {e horizontal} box, break hints never split the line (but the
line may be split in a box nested deeper),
- within a {e vertical} box, break hints always split the line,
- within an {e horizontal/vertical} box, if the box fits on the current line
then break hints never split the line, otherwise break hint always split
the line,
- within a {e compacting} box, a break hint never splits the line,
unless there is no more room on the current line.
Note that line splitting policy is box specific: the policy of a box does
not rule the policy of inner boxes. For instance, if a vertical box is
nested in an horizontal box, all break hints within the vertical box will
split the line.
Moreover, opening a box after the {{!maxindent}maximum indentation limit}
splits the line whether or not the box would end up fitting on the line.
*)
val pp_open_box : formatter -> int -> unit
(** [pp_open_box ppf d] opens a new compacting pretty-printing box with
offset [d] in the formatter [ppf].
Within this box, the pretty-printer prints as much as possible material on
every line.
A break hint splits the line if there is no more room on the line to
print the remainder of the box.
Within this box, the pretty-printer emphasizes the box structure:
if a structural box does not fit fully on a simple line, a break
hint also splits the line if the splitting ``moves to the left''
(i.e. the new line gets an indentation smaller than the one of the current
line).
This box is the general purpose pretty-printing box.
If the pretty-printer splits the line in the box, offset [d] is added to
the current indentation.
*)
val pp_close_box : formatter -> unit -> unit
(** Closes the most recently open pretty-printing box. *)
val pp_open_hbox : formatter -> unit -> unit
(** [pp_open_hbox ppf ()] opens a new 'horizontal' pretty-printing box.
This box prints material on a single line.
Break hints in a horizontal box never split the line.
(Line splitting may still occur inside boxes nested deeper).
*)
val pp_open_vbox : formatter -> int -> unit
(** [pp_open_vbox ppf d] opens a new 'vertical' pretty-printing box
with offset [d].
This box prints material on as many lines as break hints in the box.
Every break hint in a vertical box splits the line.
If the pretty-printer splits the line in the box, [d] is added to the
current indentation.
*)
val pp_open_hvbox : formatter -> int -> unit
(** [pp_open_hvbox ppf d] opens a new 'horizontal/vertical' pretty-printing box
with offset [d].
This box behaves as an horizontal box if it fits on a single line,
otherwise it behaves as a vertical box.
If the pretty-printer splits the line in the box, [d] is added to the
current indentation.
*)
val pp_open_hovbox : formatter -> int -> unit
(** [pp_open_hovbox ppf d] opens a new 'horizontal-or-vertical'
pretty-printing box with offset [d].
This box prints material as much as possible on every line.
A break hint splits the line if there is no more room on the line to
print the remainder of the box.
If the pretty-printer splits the line in the box, [d] is added to the
current indentation.
*)
(** {1 Formatting functions} *)
val pp_print_string : formatter -> string -> unit
(** [pp_print_string ppf s] prints [s] in the current pretty-printing box. *)
val pp_print_as : formatter -> int -> string -> unit
(** [pp_print_as ppf len s] prints [s] in the current pretty-printing box.
The pretty-printer formats [s] as if it were of length [len].
*)
val pp_print_int : formatter -> int -> unit
(** Print an integer in the current pretty-printing box. *)
val pp_print_char : formatter -> char -> unit
(** Print a character in the current pretty-printing box. *)
val pp_print_bool : formatter -> bool -> unit
(** Print a boolean in the current pretty-printing box. *)
(** {1:breaks Break hints} *)
(** A 'break hint' tells the pretty-printer to output some space or split the
line whichever way is more appropriate to the current pretty-printing box
splitting rules.
Break hints are used to separate printing items and are mandatory to let
the pretty-printer correctly split lines and indent items.
Simple break hints are:
- the 'space': output a space or split the line if appropriate,
- the 'cut': split the line if appropriate.
Note: the notions of space and line splitting are abstract for the
pretty-printing engine, since those notions can be completely redefined
by the programmer.
However, in the pretty-printer default setting, ``output a space'' simply
means printing a space character (ASCII code 32) and ``split the line''
means printing a newline character (ASCII code 10).
*)
val pp_print_space : formatter -> unit -> unit
(** [pp_print_space ppf ()] emits a 'space' break hint:
the pretty-printer may split the line at this point,
otherwise it prints one space.
[pp_print_space ppf ()] is equivalent to [pp_print_break ppf 1 0].
*)
val pp_print_cut : formatter -> unit -> unit
(** [pp_print_cut ppf ()] emits a 'cut' break hint:
the pretty-printer may split the line at this point,
otherwise it prints nothing.
[pp_print_cut ppf ()] is equivalent to [pp_print_break ppf 0 0].
*)
val pp_print_break : formatter -> int -> int -> unit
(** [pp_print_break ppf nspaces offset] emits a 'full' break hint:
the pretty-printer may split the line at this point,
otherwise it prints [nspaces] spaces.
If the pretty-printer splits the line, [offset] is added to
the current indentation.
*)
val pp_print_custom_break :
formatter ->
fits:(string * int * string) ->
breaks:(string * int * string) ->
unit
(** [pp_print_custom_break ppf ~fits:(s1, n, s2) ~breaks:(s3, m, s4)] emits a
custom break hint: the pretty-printer may split the line at this point.
If it does not split the line, then the [s1] is emitted, then [n] spaces,
then [s2].
If it splits the line, then it emits the [s3] string, then an indent
(according to the box rules), then an offset of [m] spaces, then the [s4]
string.
While [n] and [m] are handled by [formatter_out_functions.out_indent], the
strings will be handled by [formatter_out_functions.out_string]. This allows
for a custom formatter that handles indentation distinctly, for example,
outputs [<br/>] tags or [ ] entities.
The custom break is useful if you want to change which visible
(non-whitespace) characters are printed in case of break or no break. For
example, when printing a list [ [a; b; c] ], you might want to add a
trailing semicolon when it is printed vertically:
{[
[
a;
b;
c;
]
]}
You can do this as follows:
{[
printf "@[<v 0>[@;<0 2>@[<v 0>a;@,b;@,c@]%t]@]@\n"
(pp_print_custom_break ~fits:("", 0, "") ~breaks:(";", 0, ""))
]}
@since 4.08.0
*)
val pp_force_newline : formatter -> unit -> unit
(** Force a new line in the current pretty-printing box.
The pretty-printer must split the line at this point,
Not the normal way of pretty-printing, since imperative line splitting may
interfere with current line counters and box size calculation.
Using break hints within an enclosing vertical box is a better
alternative.
*)
val pp_print_if_newline : formatter -> unit -> unit
(** Execute the next formatting command if the preceding line
has just been split. Otherwise, ignore the next formatting
command.
*)
(** {1 Pretty-printing termination} *)
val pp_print_flush : formatter -> unit -> unit
(** End of pretty-printing: resets the pretty-printer to initial state.
All open pretty-printing boxes are closed, all pending text is printed.
In addition, the pretty-printer low level output device is flushed to
ensure that all pending text is really displayed.
Note: never use [print_flush] in the normal course of a pretty-printing
routine, since the pretty-printer uses a complex buffering machinery to
properly indent the output; manually flushing those buffers at random
would conflict with the pretty-printer strategy and result to poor
rendering.
Only consider using [print_flush] when displaying all pending material is
mandatory (for instance in case of interactive use when you want the user
to read some text) and when resetting the pretty-printer state will not
disturb further pretty-printing.
Warning: If the output device of the pretty-printer is an output channel,
repeated calls to [print_flush] means repeated calls to {!Stdlib.flush}
to flush the out channel; these explicit flush calls could foil the
buffering strategy of output channels and could dramatically impact
efficiency.
*)
val pp_print_newline : formatter -> unit -> unit
(** End of pretty-printing: resets the pretty-printer to initial state.
All open pretty-printing boxes are closed, all pending text is printed.
Equivalent to {!print_flush} followed by a new line.
See corresponding words of caution for {!print_flush}.
Note: this is not the normal way to output a new line;
the preferred method is using break hints within a vertical pretty-printing
box.
*)
(** {1 Margin} *)
val pp_set_margin : formatter -> int -> unit
(** [pp_set_margin ppf d] sets the right margin to [d] (in characters):
the pretty-printer splits lines that overflow the right margin according to
the break hints given.
Setting the margin to [d] means that the formatting engine aims at
printing at most [d-1] characters per line.
Nothing happens if [d] is smaller than 2.
If [d] is too large, the right margin is set to the maximum
admissible value (which is greater than [10 ^ 9]).
If [d] is less than the current maximum indentation limit, the
maximum indentation limit is decreased while trying to preserve
a minimal ratio [max_indent/margin>=50%] and if possible
the current difference [margin - max_indent].
See also {!pp_set_geometry}.
*)
val pp_get_margin : formatter -> unit -> int
(** Returns the position of the right margin. *)
(** {1:maxindent Maximum indentation limit} *)
val pp_set_max_indent : formatter -> int -> unit
(** [pp_set_max_indent ppf d] sets the maximum indentation limit of lines
to [d] (in characters):
once this limit is reached, new pretty-printing boxes are rejected to the
left, unless the enclosing box fully fits on the current line.
As an illustration,
{[ set_margin 10; set_max_indent 5; printf "@[123456@[7@]89A@]@." ]}
yields
{[
123456
789A
]}
because the nested box ["@[7@]"] is opened after the maximum indentation
limit ([7>5]) and its parent box does not fit on the current line.
Either decreasing the length of the parent box to make it fit on a line:
{[ printf "@[123456@[7@]89@]@." ]}
or opening an intermediary box before the maximum indentation limit which
fits on the current line
{[ printf "@[123@[456@[7@]89@]A@]@." ]}
avoids the rejection to the left of the inner boxes and print respectively
["123456789"] and ["123456789A"] .
Note also that vertical boxes never fit on a line whereas horizontal boxes
always fully fit on the current line.
Opening a box may split a line whereas the contents may have fit.
If this behavior is problematic, it can be curtailed by setting the maximum
indentation limit to [margin - 1]. Note that setting the maximum indentation
limit to [margin] is invalid.
Nothing happens if [d] is smaller than 2.
If [d] is too large, the limit is set to the maximum
admissible value (which is greater than [10 ^ 9]).
If [d] is greater or equal than the current margin, it is ignored,
and the current maximum indentation limit is kept.
See also {!pp_set_geometry}.
*)
val pp_get_max_indent : formatter -> unit -> int
(** Return the maximum indentation limit (in characters). *)
(** {1 Maximum formatting depth} *)
(** The maximum formatting depth is the maximum number of pretty-printing
boxes simultaneously open.
Material inside boxes nested deeper is printed as an ellipsis (more
precisely as the text returned by {!get_ellipsis_text} [()]).
*)
val pp_set_max_boxes : formatter -> int -> unit
(** [pp_set_max_boxes ppf max] sets the maximum number of pretty-printing
boxes simultaneously open.
Material inside boxes nested deeper is printed as an ellipsis (more
precisely as the text returned by {!get_ellipsis_text} [()]).
Nothing happens if [max] is smaller than 2.
*)
val pp_get_max_boxes : formatter -> unit -> int
(** Returns the maximum number of pretty-printing boxes allowed before
ellipsis.
*)
val pp_over_max_boxes : formatter -> unit -> bool
(** Tests if the maximum number of pretty-printing boxes allowed have already
been opened.
*)
(** {1 Tabulation boxes} *)
(**
A {e tabulation box} prints material on lines divided into cells of fixed
length. A tabulation box provides a simple way to display vertical columns
of left adjusted text.
This box features command [set_tab] to define cell boundaries, and command
[print_tab] to move from cell to cell and split the line when there is no
more cells to print on the line.
Note: printing within tabulation box is line directed, so arbitrary line
splitting inside a tabulation box leads to poor rendering. Yet, controlled
use of tabulation boxes allows simple printing of columns within
module {!Format}.
*)
val pp_open_tbox : formatter -> unit -> unit
(** [open_tbox ()] opens a new tabulation box.
This box prints lines separated into cells of fixed width.
Inside a tabulation box, special {e tabulation markers} defines points of
interest on the line (for instance to delimit cell boundaries).
Function {!Format.set_tab} sets a tabulation marker at insertion point.
A tabulation box features specific {e tabulation breaks} to move to next
tabulation marker or split the line. Function {!Format.print_tbreak} prints
a tabulation break.
*)
val pp_close_tbox : formatter -> unit -> unit
(** Closes the most recently opened tabulation box. *)
val pp_set_tab : formatter -> unit -> unit
(** Sets a tabulation marker at current insertion point. *)
val pp_print_tab : formatter -> unit -> unit
(** [print_tab ()] emits a 'next' tabulation break hint: if not already set on
a tabulation marker, the insertion point moves to the first tabulation
marker on the right, or the pretty-printer splits the line and insertion
point moves to the leftmost tabulation marker.
It is equivalent to [print_tbreak 0 0]. *)
val pp_print_tbreak : formatter -> int -> int -> unit
(** [print_tbreak nspaces offset] emits a 'full' tabulation break hint.
If not already set on a tabulation marker, the insertion point moves to the
first tabulation marker on the right and the pretty-printer prints
[nspaces] spaces.
If there is no next tabulation marker on the right, the pretty-printer
splits the line at this point, then insertion point moves to the leftmost
tabulation marker of the box.
If the pretty-printer splits the line, [offset] is added to
the current indentation.
*)
(** {1 Ellipsis} *)
val pp_set_ellipsis_text : formatter -> string -> unit
(** Set the text of the ellipsis printed when too many pretty-printing boxes
are open (a single dot, [.], by default).
*)
val pp_get_ellipsis_text : formatter -> unit -> string
(** Return the text of the ellipsis. *)
(** {1 Convenience formatting functions.} *)
val pp_print_list:
?pp_sep:(formatter -> unit -> unit) ->
(formatter -> 'a -> unit) -> (formatter -> 'a list -> unit)
(** [pp_print_list ?pp_sep pp_v ppf l] prints items of list [l],
using [pp_v] to print each item, and calling [pp_sep]
between items ([pp_sep] defaults to {!pp_print_cut}.
Does nothing on empty lists.
@since 4.02.0
*)
val pp_print_text : formatter -> string -> unit
(** [pp_print_text ppf s] prints [s] with spaces and newlines respectively
printed using {!pp_print_space} and {!pp_force_newline}.
@since 4.02.0
*)
val pp_print_option :
?none:(formatter -> unit -> unit) ->
(formatter -> 'a -> unit) -> (formatter -> 'a option -> unit)
(** [pp_print_option ?none pp_v ppf o] prints [o] on [ppf]
using [pp_v] if [o] is [Some v] and [none] if it is [None]. [none]
prints nothing by default.
@since 4.08 *)
val pp_print_result :
ok:(formatter -> 'a -> unit) -> error:(formatter -> 'e -> unit) ->
formatter -> ('a, 'e) result -> unit
(** [pp_print_result ~ok ~error ppf r] prints [r] on [ppf] using
[ok] if [r] is [Ok _] and [error] if [r] is [Error _].
@since 4.08 *)
(** {1:fpp Formatted pretty-printing} *)
(**
Module [Format] provides a complete set of [printf] like functions for
pretty-printing using format string specifications.
Specific annotations may be added in the format strings to give
pretty-printing commands to the pretty-printing engine.
Those annotations are introduced in the format strings using the [@]
character. For instance, [@ ] means a space break, [@,] means a cut,
[@\[] opens a new box, and [@\]] closes the last open box.
*)
val fprintf : formatter -> ('a, formatter, unit) format -> 'a
(** [fprintf ff fmt arg1 ... argN] formats the arguments [arg1] to [argN]
according to the format string [fmt], and outputs the resulting string on
the formatter [ff].
The format string [fmt] is a character string which contains three types of
objects: plain characters and conversion specifications as specified in
the {!Printf} module, and pretty-printing indications specific to the
[Format] module.
The pretty-printing indication characters are introduced by
a [@] character, and their meanings are:
- [@\[]: open a pretty-printing box. The type and offset of the
box may be optionally specified with the following syntax:
the [<] character, followed by an optional box type indication,
then an optional integer offset, and the closing [>] character.
Pretty-printing box type is one of [h], [v], [hv], [b], or [hov].
'[h]' stands for an 'horizontal' pretty-printing box,
'[v]' stands for a 'vertical' pretty-printing box,
'[hv]' stands for an 'horizontal/vertical' pretty-printing box,
'[b]' stands for an 'horizontal-or-vertical' pretty-printing box
demonstrating indentation,
'[hov]' stands a simple 'horizontal-or-vertical' pretty-printing box.
For instance, [@\[<hov 2>] opens an 'horizontal-or-vertical'
pretty-printing box with indentation 2 as obtained with [open_hovbox 2].
For more details about pretty-printing boxes, see the various box opening
functions [open_*box].
- [@\]]: close the most recently opened pretty-printing box.
- [@,]: output a 'cut' break hint, as with [print_cut ()].
- [@ ]: output a 'space' break hint, as with [print_space ()].
- [@;]: output a 'full' break hint as with [print_break]. The
[nspaces] and [offset] parameters of the break hint may be
optionally specified with the following syntax:
the [<] character, followed by an integer [nspaces] value,
then an integer [offset], and a closing [>] character.
If no parameters are provided, the good break defaults to a
'space' break hint.
- [@.]: flush the pretty-printer and split the line, as with
[print_newline ()].
- [@<n>]: print the following item as if it were of length [n].
Hence, [printf "@<0>%s" arg] prints [arg] as a zero length string.
If [@<n>] is not followed by a conversion specification,
then the following character of the format is printed as if
it were of length [n].
- [@\{]: open a semantic tag. The name of the tag may be optionally
specified with the following syntax:
the [<] character, followed by an optional string
specification, and the closing [>] character. The string
specification is any character string that does not contain the
closing character ['>']. If omitted, the tag name defaults to the
empty string.
For more details about semantic tags, see the functions {!open_stag} and
{!close_stag}.
- [@\}]: close the most recently opened semantic tag.
- [@?]: flush the pretty-printer as with [print_flush ()].
This is equivalent to the conversion [%!].
- [@\n]: force a newline, as with [force_newline ()], not the normal way
of pretty-printing, you should prefer using break hints inside a vertical
pretty-printing box.
Note: To prevent the interpretation of a [@] character as a
pretty-printing indication, escape it with a [%] character.
Old quotation mode [@@] is deprecated since it is not compatible with
formatted input interpretation of character ['@'].
Example: [printf "@[%s@ %d@]@." "x =" 1] is equivalent to
[open_box (); print_string "x ="; print_space ();
print_int 1; close_box (); print_newline ()].
It prints [x = 1] within a pretty-printing 'horizontal-or-vertical' box.
*)
val sprintf : ('a, unit, string) format -> 'a
(** Same as [printf] above, but instead of printing on a formatter,
returns a string containing the result of formatting the arguments.
Note that the pretty-printer queue is flushed at the end of {e each
call} to [sprintf].
In case of multiple and related calls to [sprintf] to output
material on a single string, you should consider using [fprintf]
with the predefined formatter [str_formatter] and call
[flush_str_formatter ()] to get the final result.
Alternatively, you can use [Format.fprintf] with a formatter writing to a
buffer of your own: flushing the formatter and the buffer at the end of
pretty-printing returns the desired string.
*)
val asprintf : ('a, formatter, unit, string) format4 -> 'a
(** Same as [printf] above, but instead of printing on a formatter,
returns a string containing the result of formatting the arguments.
The type of [asprintf] is general enough to interact nicely with [%a]
conversions.
@since 4.01.0
*)
val dprintf :
('a, formatter, unit, formatter -> unit) format4 -> 'a
(** Same as {!fprintf}, except the formatter is the last argument.
[dprintf "..." a b c] is a function of type
[formatter -> unit] which can be given to a format specifier [%t].
This can be used as a replacement for {!asprintf} to delay
formatting decisions. Using the string returned by {!asprintf} in a
formatting context forces formatting decisions to be taken in
isolation, and the final string may be created
prematurely. {!dprintf} allows delay of formatting decisions until
the final formatting context is known.
For example:
{[
let t = Format.dprintf "%i@ %i@ %i" 1 2 3 in
...
Format.printf "@[<v>%t@]" t
]}
@since 4.08.0
*)
val ifprintf : formatter -> ('a, formatter, unit) format -> 'a
(** Same as [fprintf] above, but does not print anything.
Useful to ignore some material when conditionally printing.
@since 3.10.0
*)
(** Formatted Pretty-Printing with continuations. *)
val kfprintf :
(formatter -> 'a) -> formatter ->
('b, formatter, unit, 'a) format4 -> 'b
(** Same as [fprintf] above, but instead of returning immediately,
passes the formatter to its first argument at the end of printing. *)
val kdprintf :
((formatter -> unit) -> 'a) ->
('b, formatter, unit, 'a) format4 -> 'b
(** Same as {!dprintf} above, but instead of returning immediately,
passes the suspended printer to its first argument at the end of printing.
@since 4.08.0
*)
val ikfprintf :
(formatter -> 'a) -> formatter ->
('b, formatter, unit, 'a) format4 -> 'b
(** Same as [kfprintf] above, but does not print anything.
Useful to ignore some material when conditionally printing.
@since 3.12.0
*)
val ksprintf : (string -> 'a) -> ('b, unit, string, 'a) format4 -> 'b
(** Same as [sprintf] above, but instead of returning the string,
passes it to the first argument. *)
val kasprintf : (string -> 'a) -> ('b, formatter, unit, 'a) format4 -> 'b
(** Same as [asprintf] above, but instead of returning the string,
passes it to the first argument.
@since 4.03
*)
end
# 22 "v5.in.ml"
module Logging : sig
# 1 "v5/logging.mli"
(** Logging levels. See [docs/developer/guidelines.rst] for their meaning *)
type level = Debug | Info | Notice | Warning | Error | Fatal
(** Logs a message. It is the shell's responsibility to manage the actual
logging.
Even though logging may involve system calls, formatting, or other work, the
shell guarantees that calling this function doesn't transfer control over
another promise. Consequently, the performance of this function can be
considered predictable from the point of view of gas-consumption.
Note that the function call has predictable performance, but that it is the
caller's responsibility to ensure that argument evaluation has predictable
performance too. E.g., [log Notice "%s" (Format.asprint …)] may spend time
formatting the argument string. *)
val log : level -> ('a, Format.formatter, unit, unit) format4 -> 'a
(** Same as [log] but more efficient with a simpler interface. *)
val log_string : level -> string -> unit
end
# 24 "v5.in.ml"
module Hex : sig
# 1 "v5/hex.mli"
(** Hexadecimal encoding.
[Hex] defines hexadecimal encodings for {{!char}characters},
{{!string}strings} and {{!cstruct}Cstruct.t} buffers. *)
type t = [`Hex of string]
(** The type var hexadecimal values. *)
(** {1:char Characters} *)
val of_char: char -> char * char
(** [of_char c] is the the hexadecimal encoding of the character
[c]. *)
val to_char: char -> char -> char option
(** [to_char x y] is the character corresponding to the [xy]
hexadecimal encoding.
Returns [None] if [x] or [y] are not in the ranges ['0'..'9'],
['a'..'f'], or ['A'..'F']. *)
(** {1:string Strings} *)
val of_string: ?ignore:char list -> string -> t
(** [of_string s] is the hexadecimal representation of the binary
string [s]. If [ignore] is set, skip the characters in the list
when converting. Eg [of_string ~ignore:[' '] "a f"]. The default
value of [ignore] is [[]]). *)
val to_string: t -> string option
(** [to_string t] is the binary string [s] such that [of_string s] is
[t].
Returns [None] if [t] contains a character that is not in the range ['0'..'9'],
['a'..'f'], or ['A'..'F']. *)
(** {1:byte Bytes} *)
val of_bytes: ?ignore:char list -> bytes -> t
(** [of_bytes s] is the hexadecimal representation of the binary
string [s]. If [ignore] is set, skip the characters in the list
when converting. Eg [of_bytes ~ignore:[' '] "a f"]. The default
value of [ignore] is [[]]). *)
val to_bytes: t -> bytes option
(** [to_bytes t] is the binary string [s] such that [of_bytes s] is
[t].
Returns [None] if [t] contains a character that is not in the range ['0'..'9'],
['a'..'f'], or ['A'..'F']. *)
(** {1 Debugging} *)
val hexdump_s: ?print_row_numbers:bool -> ?print_chars:bool -> t -> string
(** Same as [hexdump] except returns a string. *)
(** {1 Pretty printing} *)
val pp : Format.formatter -> t -> unit [@@ocaml.toplevel_printer]
(** [pp fmt t] will output a human-readable hex representation of [t]
to the formatter [fmt]. *)
val show : t -> string
(** [show t] will return a human-readable hex representation of [t] as
a string. *)
end
# 26 "v5.in.ml"
module Z : sig
# 1 "v5/z.mli"
(**
Integers.
This modules provides arbitrary-precision integers.
Small integers internally use a regular OCaml [int].
When numbers grow too large, we switch transparently to GMP numbers
([mpn] numbers fully allocated on the OCaml heap).
This interface is rather similar to that of [Int32] and [Int64],
with some additional functions provided natively by GMP
(GCD, square root, pop-count, etc.).
This file is part of the Zarith library
http://forge.ocamlcore.org/projects/zarith .
It is distributed under LGPL 2 licensing, with static linking exception.
See the LICENSE file included in the distribution.
Copyright (c) 2010-2011 Antoine Miné, Abstraction project.
Abstraction is part of the LIENS (Laboratoire d'Informatique de l'ENS),
a joint laboratory by:
CNRS (Centre national de la recherche scientifique, France),
ENS (École normale supérieure, Paris, France),
INRIA Rocquencourt (Institut national de recherche en informatique, France).
*)
(** {1 Toplevel} *)
(** For an optimal experience with the [ocaml] interactive toplevel,
the magic commands are:
{[
#load "zarith.cma";;
#install_printer Z.pp_print;;
]}
Alternatively, using the new [Zarith_top] toplevel module, simply:
{[
#require "zarith.top";;
]}
*)
(** {1 Types} *)
type t
(** Type of integers of arbitrary length. *)
exception Overflow
(** Raised by conversion functions when the value cannot be represented in
the destination type.
*)
(** {1 Construction} *)
val zero: t
(** The number 0. *)
val one: t
(** The number 1. *)
val minus_one: t
(** The number -1. *)
external of_int: int -> t = "%identity"
(** Converts from a base integer. *)
external of_int32: int32 -> t = "ml_z_of_int32"
(** Converts from a 32-bit integer. *)
external of_int64: int64 -> t = "ml_z_of_int64"
(** Converts from a 64-bit integer. *)
val of_string: string -> t
(** Converts a string to an integer.
An optional [-] prefix indicates a negative number, while a [+]
prefix is ignored.
An optional prefix [0x], [0o], or [0b] (following the optional [-]
or [+] prefix) indicates that the number is,
represented, in hexadecimal, octal, or binary, respectively.
Otherwise, base 10 is assumed.
(Unlike C, a lone [0] prefix does not denote octal.)
Raises an [Invalid_argument] exception if the string is not a
syntactically correct representation of an integer.
*)
val of_substring : string -> pos:int -> len:int -> t
(** [of_substring s ~pos ~len] is the same as [of_string (String.sub s
pos len)]
*)
val of_string_base: int -> string -> t
(** Parses a number represented as a string in the specified base,
with optional [-] or [+] prefix.
The base must be between 2 and 16.
*)
external of_substring_base
: int -> string -> pos:int -> len:int -> t
= "ml_z_of_substring_base"
(** [of_substring_base base s ~pos ~len] is the same as [of_string_base
base (String.sub s pos len)]
*)
(** {1 Basic arithmetic operations} *)
val succ: t -> t
(** Returns its argument plus one. *)
val pred: t -> t
(** Returns its argument minus one. *)
val abs: t -> t
(** Absolute value. *)
val neg: t -> t
(** Unary negation. *)
val add: t -> t -> t
(** Addition. *)
val sub: t -> t -> t
(** Subtraction. *)
val mul: t -> t -> t
(** Multiplication. *)
val div: t -> t -> t
(** Integer division. The result is truncated towards zero
and obeys the rule of signs.
Raises [Division_by_zero] if the divisor (second argument) is 0.
*)
val rem: t -> t -> t
(** Integer remainder. Can raise a [Division_by_zero].
The result of [rem a b] has the sign of [a], and its absolute value is
strictly smaller than the absolute value of [b].
The result satisfies the equality [a = b * div a b + rem a b].
*)
external div_rem: t -> t -> (t * t) = "ml_z_div_rem"
(** Computes both the integer quotient and the remainder.
[div_rem a b] is equal to [(div a b, rem a b)].
Raises [Division_by_zero] if [b = 0].
*)
external cdiv: t -> t -> t = "ml_z_cdiv"
(** Integer division with rounding towards +oo (ceiling).
Can raise a [Division_by_zero].
*)
external fdiv: t -> t -> t = "ml_z_fdiv"
(** Integer division with rounding towards -oo (floor).
Can raise a [Division_by_zero].
*)
val ediv_rem: t -> t -> (t * t)
(** Euclidean division and remainder. [ediv_rem a b] returns a pair [(q, r)]
such that [a = b * q + r] and [0 <= r < |b|].
Raises [Division_by_zero] if [b = 0].
*)
val ediv: t -> t -> t
(** Euclidean division. [ediv a b] is equal to [fst (ediv_rem a b)].
The result satisfies [0 <= a - b * ediv a b < |b|].
Raises [Division_by_zero] if [b = 0].
*)
val erem: t -> t -> t
(** Euclidean remainder. [erem a b] is equal to [snd (ediv_rem a b)].
The result satisfies [0 <= erem a b < |b|] and
[a = b * ediv a b + erem a b]. Raises [Division_by_zero] if [b = 0].
*)
val divexact: t -> t -> t
(** [divexact a b] divides [a] by [b], only producing correct result when the
division is exact, i.e., when [b] evenly divides [a].
It should be faster than general division.
Can raise a [Division_by_zero].
*)
external divisible: t -> t -> bool = "ml_z_divisible"
(** [divisible a b] returns [true] if [a] is exactly divisible by [b].
Unlike the other division functions, [b = 0] is accepted
(only 0 is considered divisible by 0).
*)
external congruent: t -> t -> t -> bool = "ml_z_congruent"
(** [congruent a b c] returns [true] if [a] is congruent to [b] modulo [c].
Unlike the other division functions, [c = 0] is accepted
(only equal numbers are considered equal congruent 0).
*)
(** {1 Bit-level operations} *)
(** For all bit-level operations, negative numbers are considered in 2's
complement representation, starting with a virtual infinite number of
1s.
*)
val logand: t -> t -> t
(** Bitwise logical and. *)
val logor: t -> t -> t
(** Bitwise logical or. *)
val logxor: t -> t -> t
(** Bitwise logical exclusive or. *)
val lognot: t -> t
(** Bitwise logical negation.
The identity [lognot a]=[-a-1] always hold.
*)
val shift_left: t -> int -> t
(** Shifts to the left.
Equivalent to a multiplication by a power of 2.
The second argument must be nonnegative.
*)
val shift_right: t -> int -> t
(** Shifts to the right.
This is an arithmetic shift,
equivalent to a division by a power of 2 with rounding towards -oo.
The second argument must be nonnegative.
*)
val shift_right_trunc: t -> int -> t
(** Shifts to the right, rounding towards 0.
This is equivalent to a division by a power of 2, with truncation.
The second argument must be nonnegative.
*)
external numbits: t -> int = "ml_z_numbits" [@@noalloc]
(** Returns the number of significant bits in the given number.
If [x] is zero, [numbits x] returns 0. Otherwise,
[numbits x] returns a positive integer [n] such that
[2^{n-1} <= |x| < 2^n]. Note that [numbits] is defined
for negative arguments, and that [numbits (-x) = numbits x]. *)
external trailing_zeros: t -> int = "ml_z_trailing_zeros" [@@noalloc]
(** Returns the number of trailing 0 bits in the given number.
If [x] is zero, [trailing_zeros x] returns [max_int].
Otherwise, [trailing_zeros x] returns a nonnegative integer [n]
which is the largest [n] such that [2^n] divides [x] evenly.
Note that [trailing_zeros] is defined for negative arguments,
and that [trailing_zeros (-x) = trailing_zeros x]. *)
val testbit: t -> int -> bool
(** [testbit x n] return the value of bit number [n] in [x]:
[true] if the bit is 1, [false] if the bit is 0.
Bits are numbered from 0. Raise [Invalid_argument] if [n]
is negative. *)
external popcount: t -> int = "ml_z_popcount"
(** Counts the number of bits set.
Raises [Overflow] for negative arguments, as those have an infinite
number of bits set.
*)
external hamdist: t -> t -> int = "ml_z_hamdist"
(** Counts the number of different bits.
Raises [Overflow] if the arguments have different signs
(in which case the distance is infinite).
*)
(** {1 Conversions} *)
(** Note that, when converting to an integer type that cannot represent the
converted value, an [Overflow] exception is raised.
*)
val to_int: t -> int
(** Converts to a base integer. May raise an [Overflow]. *)
external to_int32: t -> int32 = "ml_z_to_int32"
(** Converts to a 32-bit integer. May raise [Overflow]. *)
external to_int64: t -> int64 = "ml_z_to_int64"
(** Converts to a 64-bit integer. May raise [Overflow]. *)
val to_string: t -> string
(** Gives a human-readable, decimal string representation of the argument. *)
external format: string -> t -> string = "ml_z_format"
(** Gives a string representation of the argument in the specified
printf-like format.
The general specification has the following form:
[% \[flags\] \[width\] type]
Where the type actually indicates the base:
- [i], [d], [u]: decimal
- [b]: binary
- [o]: octal
- [x]: lowercase hexadecimal
- [X]: uppercase hexadecimal
Supported flags are:
- [+]: prefix positive numbers with a [+] sign
- space: prefix positive numbers with a space
- [-]: left-justify (default is right justification)
- [0]: pad with zeroes (instead of spaces)
- [#]: alternate formatting (actually, simply output a literal-like prefix: [0x], [0b], [0o])
Unlike the classic [printf], all numbers are signed (even hexadecimal ones),
there is no precision field, and characters that are not part of the format
are simply ignored (and not copied in the output).
*)
external fits_int: t -> bool = "ml_z_fits_int" [@@noalloc]
(** Whether the argument fits in a regular [int]. *)
external fits_int32: t -> bool = "ml_z_fits_int32" [@@noalloc]
(** Whether the argument fits in an [int32]. *)
external fits_int64: t -> bool = "ml_z_fits_int64" [@@noalloc]
(** Whether the argument fits in an [int64]. *)
(** {1 Printing} *)
val pp_print: Format.formatter -> t -> unit
(** Prints the argument on the specified formatter.
Can be used as [%a] format printer in [Format.printf] and as
argument to [#install_printer] in the top-level.
*)
(** {1 Ordering} *)
external compare: t -> t -> int = "ml_z_compare" [@@noalloc]
(** Comparison. [compare x y] returns 0 if [x] equals [y],
-1 if [x] is smaller than [y], and 1 if [x] is greater than [y].
Note that Pervasive.compare can be used to compare reliably two integers
only on OCaml 3.12.1 and later versions.
*)
external equal: t -> t -> bool = "ml_z_equal" [@@noalloc]
(** Equality test. *)
val leq: t -> t -> bool
(** Less than or equal. *)
val geq: t -> t -> bool
(** Greater than or equal. *)
val lt: t -> t -> bool
(** Less than (and not equal). *)
val gt: t -> t -> bool
(** Greater than (and not equal). *)
external sign: t -> int = "ml_z_sign" [@@noalloc]
(** Returns -1, 0, or 1 when the argument is respectively negative, null, or
positive.
*)
val min: t -> t -> t
(** Returns the minimum of its arguments. *)
val max: t -> t -> t
(** Returns the maximum of its arguments. *)
val is_even: t -> bool
(** Returns true if the argument is even (divisible by 2), false if odd. *)
val is_odd: t -> bool
(** Returns true if the argument is odd, false if even. *)
(** {1 Powers} *)
external pow: t -> int -> t = "ml_z_pow"
(** [pow base exp] raises [base] to the [exp] power.
[exp] must be nonnegative.
Note that only exponents fitting in a machine integer are supported, as
larger exponents would surely make the result's size overflow the
address space.
*)
external sqrt: t -> t = "ml_z_sqrt"
(** Returns the square root. The result is truncated (rounded down
to an integer).
Raises an [Invalid_argument] on negative arguments.
*)
external sqrt_rem: t -> (t * t) = "ml_z_sqrt_rem"
(** Returns the square root truncated, and the remainder.
Raises an [Invalid_argument] on negative arguments.
*)
external root: t -> int -> t = "ml_z_root"
(** [root x n] computes the [n]-th root of [x].
[n] must be positive and, if [n] is even, then [x] must be nonnegative.
Otherwise, an [Invalid_argument] is raised.
*)
external rootrem: t -> int -> t * t = "ml_z_rootrem"
(** [rootrem x n] computes the [n]-th root of [x] and the remainder
[x-root**n].
[n] must be positive and, if [n] is even, then [x] must be nonnegative.
Otherwise, an [Invalid_argument] is raised.
*)
external perfect_power: t -> bool = "ml_z_perfect_power"
(** True if the argument has the form [a^b], with [b>1] *)
external perfect_square: t -> bool = "ml_z_perfect_square"
(** True if the argument has the form [a^2]. *)
val log2: t -> int
(** Returns the base-2 logarithm of its argument, rounded down to
an integer. If [x] is positive, [log2 x] returns the largest [n]
such that [2^n <= x]. If [x] is negative or zero, [log2 x] raise
the [Invalid_argument] exception. *)
val log2up: t -> int
(** Returns the base-2 logarithm of its argument, rounded up to
an integer. If [x] is positive, [log2up x] returns the smallest [n]
such that [x <= 2^n]. If [x] is negative or zero, [log2up x] raise
the [Invalid_argument] exception. *)
(** {1 Representation} *)
external size: t -> int = "ml_z_size" [@@noalloc]
(** Returns the number of machine words used to represent the number. *)
(** [extract a off len] returns a nonnegative number corresponding to bits
[off] to [off]+[len]-1 of [b].
Negative [a] are considered in infinite-length 2's complement
representation.
*)
(** [signed_extract a off len] extracts bits [off] to [off]+[len]-1 of [b],
as [extract] does, then sign-extends bit [len-1] of the result
(that is, bit [off + len - 1] of [a]). The result is between
[- 2{^[len]-1}] (included) and [2{^[len]-1}] (excluded),
and equal to [extract a off len] modulo [2{^len}].
*)
external to_bits: t -> string = "ml_z_to_bits"
(** Returns a binary representation of the argument.
The string result should be interpreted as a sequence of bytes,
corresponding to the binary representation of the absolute value of
the argument in little endian ordering.
The sign is not stored in the string.
*)
external of_bits: string -> t = "ml_z_of_bits"
(** Constructs a number from a binary string representation.
The string is interpreted as a sequence of bytes in little endian order,
and the result is always positive.
We have the identity: [of_bits (to_bits x) = abs x].
However, we can have [to_bits (of_bits s) <> s] due to the presence of
trailing zeros in s.
*)
end
# 28 "v5.in.ml"
module Lwt : sig
# 1 "v5/lwt.mli"
(** {2 Fundamentals} *)
(** {3 Promises} *)
type +'a t
(** Promises for values of type ['a].
A {b promise} is a memory cell that is always in one of three {b states}:
- {e fulfilled}, and containing one value of type ['a],
- {e rejected}, and containing one exception, or
- {e pending}, in which case it may become fulfilled or rejected later.
A {e resolved} promise is one that is either fulfilled or rejected, i.e. not
pending. Once a promise is resolved, its content cannot change. So, promises
are {e write-once references}. The only possible state changes are (1) from
pending to fulfilled and (2) from pending to rejected.
Promises are typically “read” by attaching {b callbacks} to them. The most
basic functions for that are {!Lwt.bind}, which attaches a callback that is
called when a promise becomes fulfilled, and {!Lwt.catch}, for rejection.
Promise variables of this type, ['a Lwt.t], are actually {b read-only} in
Lwt. Separate {e resolvers} of type ['a ]{!Lwt.u} are used to write to them.
Promises and their resolvers are created together by calling {!Lwt.wait}.
There is one exception to this: most promises can be {e canceled} by calling
{!Lwt.cancel}, without going through a resolver. *)
val return : 'a -> 'a t
(** [Lwt.return v] creates a new {{: #TYPEt} promise} that is {e already
fulfilled} with value [v].
This is needed to satisfy the type system in some cases. For example, in a
[match] expression where one case evaluates to a promise, the other cases
have to evaluate to promises as well:
{[
match need_input with
| true -> Lwt_io.(read_line stdin) (* Has type string Lwt.t... *)
| false -> Lwt.return "" (* ...so wrap empty string in a promise. *)
]}
Another typical usage is in {{: #VALbind} [let%lwt]}. The expression after
the “[in]” has to evaluate to a promise. So, if you compute an ordinary
value instead, you have to wrap it:
{[
let%lwt line = Lwt_io.(read_line stdin) in
Lwt.return (line ^ ".")
]} *)
(** {3 Callbacks} *)
val bind : 'a t -> ('a -> 'b t) -> 'b t
(** [Lwt.bind p_1 f] makes it so that [f] will run when [p_1] is {{: #TYPEt}
{e fulfilled}}.
When [p_1] is fulfilled with value [v_1], the callback [f] is called with
that same value [v_1]. Eventually, after perhaps starting some I/O or other
computation, [f] returns promise [p_2].
[Lwt.bind] itself returns immediately. It only attaches the callback [f] to
[p_1] – it does not wait for [p_2]. {e What} [Lwt.bind] returns is yet a
third promise, [p_3]. Roughly speaking, fulfillment of [p_3] represents both
[p_1] and [p_2] becoming fulfilled, one after the other.
A minimal example of this is an echo program:
{[
let () =
let p_3 =
Lwt.bind
Lwt_io.(read_line stdin)
(fun line -> Lwt_io.printl line)
in
Lwt_main.run p_3
(* ocamlfind opt -linkpkg -thread -package lwt.unix code.ml && ./a.out *)
]}
Rejection of [p_1] and [p_2], and raising an exception in [f], are all
forwarded to rejection of [p_3].
{b Precise behavior}
[Lwt.bind] returns a promise [p_3] immediately. [p_3] starts out pending,
and is resolved as follows:
- The first condition to wait for is that [p_1] becomes resolved. It does
not matter whether [p_1] is already resolved when [Lwt.bind] is called, or
becomes resolved later – the rest of the behavior is the same.
- If and when [p_1] becomes resolved, it will, by definition, be either
fulfilled or rejected.
- If [p_1] is rejected, [p_3] is rejected with the same exception.
- If [p_1] is fulfilled, with value [v], [f] is applied to [v].
- [f] may finish by returning the promise [p_2], or raising an exception.
- If [f] raises an exception, [p_3] is rejected with that exception.
- Finally, the remaining case is when [f] returns [p_2]. From that point on,
[p_3] is effectively made into a reference to [p_2]. This means they have
the same state, undergo the same state changes, and performing any
operation on one is equivalent to performing it on the other.
{b Syntactic sugar}
[Lwt.bind] is almost never written directly, because sequences of [Lwt.bind]
result in growing indentation and many parentheses:
{[
let () =
Lwt_main.run begin
Lwt.bind Lwt_io.(read_line stdin) (fun line ->
Lwt.bind (Lwt_unix.sleep 1.) (fun () ->
Lwt_io.printf "One second ago, you entered %s\n" line))
end
(* ocamlfind opt -linkpkg -thread -package lwt.unix code.ml && ./a.out *)
]}
The recommended way to write [Lwt.bind] is using the [let%lwt] syntactic
sugar:
{[
let () =
Lwt_main.run begin
let%lwt line = Lwt_io.(read_line stdin) in
let%lwt () = Lwt_unix.sleep 1. in
Lwt_io.printf "One second ago, you entered %s\n" line
end
(* ocamlfind opt -linkpkg -thread -package lwt_ppx,lwt.unix code.ml && ./a.out *)
]}
This uses the Lwt {{: Ppx_lwt.html} PPX} (preprocessor). Note that we had to
add package [lwt_ppx] to the command line for building this program. We will
do that throughout this manual.
Another way to write [Lwt.bind], that you may encounter while reading code,
is with the [>>=] operator:
{[
open Lwt.Infix
let () =
Lwt_main.run begin
Lwt_io.(read_line stdin) >>= fun line ->
Lwt_unix.sleep 1. >>= fun () ->
Lwt_io.printf "One second ago, you entered %s\n" line
end
(* ocamlfind opt -linkpkg -thread -package lwt.unix code.ml && ./a.out *)
]}
The [>>=] operator comes from the module {!Lwt.Infix}, which is why we
opened it at the beginning of the program.
See also {!Lwt.map}. *)
(** {2 Convenience} *)
(** {3 Callback helpers} *)
val map : ('a -> 'b) -> 'a t -> 'b t
(** [Lwt.map f p_1] is similar to {!Lwt.bind}[ p_1 f], but [f] is not expected
to return a promise.
This function is more convenient that {!Lwt.bind} when [f] inherently does
not return a promise. An example is [Stdlib.int_of_string]:
{[
let read_int : unit -> int Lwt.t = fun () ->
Lwt.map
int_of_string
Lwt_io.(read_line stdin)
let () =
Lwt_main.run begin
let%lwt number = read_int () in
Lwt_io.printf "%i\n" number
end
(* ocamlfind opt -linkpkg -thread -package lwt_ppx,lwt.unix code.ml && ./a.out *)
]}
By comparison, the {!Lwt.bind} version is more awkward:
{[
let read_int : unit -> int Lwt.t = fun () ->
Lwt.bind
Lwt_io.(read_line stdin)
(fun line -> Lwt.return (int_of_string line))
]}
As with {!Lwt.bind}, sequences of calls to [Lwt.map] result in excessive
indentation and parentheses. The recommended syntactic sugar for avoiding
this is the {{: #VAL(>|=)} [>|=]} operator, which comes from module
[Lwt.Infix]:
{[
open Lwt.Infix
let read_int : unit -> int Lwt.t = fun () ->
Lwt_io.(read_line stdin) >|= int_of_string
]}
The detailed operation follows. For consistency with the promises in
{!Lwt.bind}, the {e two} promises involved are named [p_1] and [p_3]:
- [p_1] is the promise passed to [Lwt.map].
- [p_3] is the promise returned by [Lwt.map].
[Lwt.map] returns a promise [p_3]. [p_3] starts out pending. It is resolved
as follows:
- [p_1] may be, or become, resolved. In that case, by definition, it will
become fulfilled or rejected. Fulfillment is the interesting case, but the
behavior on rejection is simpler, so we focus on rejection first.
- When [p_1] becomes rejected, [p_3] is rejected with the same exception.
- When [p_1] instead becomes fulfilled, call the value it is fulfilled with
[v].
- [f v] is applied. If this finishes, it may either return another value, or
raise an exception.
- If [f v] returns another value [v'], [p_3] is fulfilled with [v'].
- If [f v] raises exception [exn], [p_3] is rejected with [exn]. *)
(** {3 Pre-allocated promises} *)
val return_unit : unit t
(** [Lwt.return_unit] is defined as {!Lwt.return}[ ()], but this definition is
evaluated only once, during initialization of module [Lwt], at the beginning
of your program.
This means the promise is allocated only once. By contrast, each time
{!Lwt.return}[ ()] is evaluated, it allocates a new promise.
It is recommended to use [Lwt.return_unit] only where you know the
allocations caused by an instance of {!Lwt.return}[ ()] are a performance
bottleneck. Generally, the cost of I/O tends to dominate the cost of
{!Lwt.return}[ ()] anyway.
In future Lwt, we hope to perform this optimization, of using a single,
pre-allocated promise, automatically, wherever {!Lwt.return}[ ()] is
written. *)
val return_none : (_ option) t
(** [Lwt.return_none] is like {!Lwt.return_unit}, but for
{!Lwt.return}[ None]. *)
val return_nil : (_ list) t
(** [Lwt.return_nil] is like {!Lwt.return_unit}, but for {!Lwt.return}[ []]. *)
val return_true : bool t
(** [Lwt.return_true] is like {!Lwt.return_unit}, but for
{!Lwt.return}[ true]. *)
val return_false : bool t
(** [Lwt.return_false] is like {!Lwt.return_unit}, but for
{!Lwt.return}[ false]. *)
end
# 30 "v5.in.ml"
module Data_encoding : sig
# 1 "v5/data_encoding.mli"
(** In memory JSON data *)
type json =
[ `O of (string * json) list
| `Bool of bool
| `Float of float
| `A of json list
| `Null
| `String of string ]
type tag_size = [`Uint8 | `Uint16]
type json_schema
(** The type descriptors for values of type ['a]. *)
type 'a t
type 'a encoding = 'a t
val classify : 'a encoding -> [`Fixed of int | `Dynamic | `Variable]
(** {3 Ground descriptors} *)
(** {4 voids} *)
(** Special value [null] in JSON, nothing in binary. *)
val null : unit encoding
(** Empty object (not included in binary, encoded as empty object in JSON). *)
val empty : unit encoding
(** Unit value, omitted in binary.
Serialized as an empty object in JSON, accepts any object when deserializing. *)
val unit : unit encoding
(** Constant string (data is not included in the binary data). *)
val constant : string -> unit encoding
(** {4 ground numerical types}
All encodings are big-endians.
- 8-bit integers (signed or unsigned) are encoded over 1 single byte.
- 16-bit integers (signed or unsigned) are encoded over 2 bytes.
- 31-bit integers are always signed and always encoded over 4 bytes.
- 32-bit integers are always signed and always encoded over 4 bytes.
- 64-bit integers are always signed and always encoded over 8 bytes.
A note on 31-bit integers. The internal representation of integers in
OCaml reserves one bit for GC tagging. The remaining bits encode a signed
integer. For compatibility with 32-bit machine, we restrict these native
integers to the 31-bit range. *)
(** Signed 8 bit integer
(data is encoded as a byte in binary and an integer in JSON). *)
val int8 : int encoding
(** Unsigned 8 bit integer
(data is encoded as a byte in binary and an integer in JSON). *)
val uint8 : int encoding
(** Signed 16 bit integer
(data is encoded as a short in binary and an integer in JSON). *)
val int16 : int encoding
(** Unsigned 16 bit integer
(data is encoded as a short in binary and an integer in JSON). *)
val uint16 : int encoding
(** Signed 31 bit integer, which corresponds to type int on 32-bit OCaml systems
(data is encoded as a 32 bit int in binary and an integer in JSON). *)
val int31 : int encoding
(** Signed 32 bit integer
(data is encoded as a 32-bit int in binary and an integer in JSON). *)
val int32 : int32 encoding
(** Signed 64 bit integer
(data is encoded as a 64-bit int in binary and a decimal string in JSON). *)
val int64 : int64 encoding
(** Integer with bounds in a given range. Both bounds are inclusive.
@raise Invalid_argument if the bounds are beyond the interval
[-2^30; 2^30-1]. These bounds are chosen to be compatible with all versions
of OCaml.
*)
val ranged_int : int -> int -> int encoding
(** Big number
In JSON, data is encoded as a decimal string.
In binary, data is encoded as a variable length sequence of
bytes, with a running unary size bit: the most significant bit of
each byte tells is this is the last byte in the sequence (0) or if
there is more to read (1). The second most significant bit of the
first byte is reserved for the sign (positive if zero). Binary_size and
sign bits ignored, data is then the binary representation of the
absolute value of the number in little-endian order. *)
val z : Z.t encoding
(** Positive big number, see [z]. *)
val n : Z.t encoding
(** {4 Other ground type encodings} *)
(** Encoding of a boolean
(data is encoded as a byte in binary and a boolean in JSON). *)
val bool : bool encoding
(** Encoding of a string
- encoded as a byte sequence in binary prefixed by the length
of the string
- encoded as a string in JSON. *)
val string : string encoding
(** Encoding of arbitrary bytes
(encoded via hex in JSON and directly as a sequence byte in binary). *)
val bytes : Bytes.t encoding
(** {3 Descriptor combinators} *)
(** Combinator to make an optional value
(represented as a 1-byte tag followed by the data (or nothing) in binary
and either the raw value or a null in JSON).
Note that the JSON representation is only weakly discriminating.
Specifically, the value [Some None] is represented as the raw value [None]
and so the two are indistinguishable. For this reason, this combinator
does not support nesting, nor does it support use within a recursive
({!mu}) encoding.
@raise Invalid_argument if called on an encoding which may be represented
as [null] in JSON. This includes an encoding of the form [option _],
[conv _ _ (option _)], [dynamic_size (option _)], etc.
@raise Invalid_argument if called within the body of a {!mu}. *)
val option : 'a encoding -> 'a option encoding
(** Combinator to make a {!result} value
represented as a 1-byte tag followed by the data of either type in binary,
and either unwrapped value in JSON (the caller must ensure that both
encodings do not collide). *)
val result : 'a encoding -> 'b encoding -> ('a, 'b) result encoding
(** Array combinator.
- encoded as an array in JSON
- encoded as the concatenation of all the element in binary
prefixed its length in bytes
@param [max_length]
If [max_length] is passed and the encoding of elements has fixed
size, a {!check_size} is automatically added for earlier rejection.
@raise Invalid_argument if the inner encoding is variable. *)
val array : ?max_length:int -> 'a encoding -> 'a array encoding
(** List combinator.
- encoded as an array in JSON
- encoded as the concatenation of all the element in binary
prefixed its length in bytes
@param [max_length]
If [max_length] is passed and the encoding of elements has fixed
size, a {!check_size} is automatically added for earlier rejection.
@raise Invalid_argument if the inner encoding is variable. *)
val list : ?max_length:int -> 'a encoding -> 'a list encoding
(** Provide a transformer from one encoding to a different one.
Used to simplify nested encodings or to change the generic tuples
built by {!obj1}, {!tup1} and the like into proper records.
A schema may optionally be provided as documentation of the new encoding. *)
val conv :
('a -> 'b) -> ('b -> 'a) -> ?schema:json_schema -> 'b encoding -> 'a encoding
(** [conv_with_guard] is similar to {!conv} but the function that takes in the value
from the outside (untrusted) world has a chance to fail.
Specifically, if the function returns [Error msg] then the decoding is
interrupted with an error carrying the message [msg]. If the function
returns [Ok _] then the decoding proceeds normally. *)
val conv_with_guard :
('a -> 'b) ->
('b -> ('a, string) result) ->
?schema:json_schema ->
'b encoding ->
'a encoding
(** [with_decoding_guard g e] is similar to [e] but decoding fails if [g]
returns [Error _] on the decoded value. *)
val with_decoding_guard :
('a -> (unit, string) result) -> 'a encoding -> 'a encoding
(** Association list.
An object in JSON, a list of pairs in binary. *)
val assoc : 'a encoding -> (string * 'a) list encoding
(** {3 Product descriptors} *)
(** An enriched encoding to represent a component in a structured
type, augmenting the encoding with a name and whether it is a
required or optional. Fields are used to encode OCaml tuples as
objects in JSON, and as sequences in binary, using combinator
{!obj1} and the like. *)
type 'a field
(** Required field. *)
val req :
?title:string -> ?description:string -> string -> 't encoding -> 't field
(** Optional field. Omitted entirely in JSON encoding if None.
Omitted in binary if the only optional field in a [`Variable]
encoding, otherwise a 1-byte prefix (`0` or `255`) tells if the
field is present or not. *)
val opt :
?title:string ->
?description:string ->
string ->
't encoding ->
't option field
(** Optional field of variable length.
Only one can be present in a given object. *)
val varopt :
?title:string ->
?description:string ->
string ->
't encoding ->
't option field
(** Required field with a default value.
If the default value is passed, the field is omitted in JSON.
The value is always serialized in binary. *)
val dft :
?title:string ->
?description:string ->
string ->
't encoding ->
't ->
't field
(** {4 Constructors for objects with N fields} *)
(** These are serialized to binary by converting each internal
object to binary and placing them in the order of the original
object. These are serialized to JSON as a JSON object with the
field names. An object might only contains one 'variable'
field, typically the last one. If the encoding of more than one
field are 'variable', the first ones should be wrapped with
[dynamic_size].
@raise Invalid_argument if more than one field is a variable one. *)
val obj1 : 'f1 field -> 'f1 encoding
val obj2 : 'f1 field -> 'f2 field -> ('f1 * 'f2) encoding
val obj3 : 'f1 field -> 'f2 field -> 'f3 field -> ('f1 * 'f2 * 'f3) encoding
val obj4 :
'f1 field ->
'f2 field ->
'f3 field ->
'f4 field ->
('f1 * 'f2 * 'f3 * 'f4) encoding
val obj5 :
'f1 field ->
'f2 field ->
'f3 field ->
'f4 field ->
'f5 field ->
('f1 * 'f2 * 'f3 * 'f4 * 'f5) encoding
val obj6 :
'f1 field ->
'f2 field ->
'f3 field ->
'f4 field ->
'f5 field ->
'f6 field ->
('f1 * 'f2 * 'f3 * 'f4 * 'f5 * 'f6) encoding
val obj7 :
'f1 field ->
'f2 field ->
'f3 field ->
'f4 field ->
'f5 field ->
'f6 field ->
'f7 field ->
('f1 * 'f2 * 'f3 * 'f4 * 'f5 * 'f6 * 'f7) encoding
val obj8 :
'f1 field ->
'f2 field ->
'f3 field ->
'f4 field ->
'f5 field ->
'f6 field ->
'f7 field ->
'f8 field ->
('f1 * 'f2 * 'f3 * 'f4 * 'f5 * 'f6 * 'f7 * 'f8) encoding
val obj9 :
'f1 field ->
'f2 field ->
'f3 field ->
'f4 field ->
'f5 field ->
'f6 field ->
'f7 field ->
'f8 field ->
'f9 field ->
('f1 * 'f2 * 'f3 * 'f4 * 'f5 * 'f6 * 'f7 * 'f8 * 'f9) encoding
val obj10 :
'f1 field ->
'f2 field ->
'f3 field ->
'f4 field ->
'f5 field ->
'f6 field ->
'f7 field ->
'f8 field ->
'f9 field ->
'f10 field ->
('f1 * 'f2 * 'f3 * 'f4 * 'f5 * 'f6 * 'f7 * 'f8 * 'f9 * 'f10) encoding
(** Create a larger object from the encodings of two smaller ones.
@raise Invalid_argument if both arguments are not objects or if both
tuples contains a variable field.. *)
val merge_objs : 'o1 encoding -> 'o2 encoding -> ('o1 * 'o2) encoding
(** {4 Constructors for tuples with N fields} *)
(** These are serialized to binary by converting each internal
object to binary and placing them in the order of the original
object. These are serialized to JSON as JSON arrays/lists. Like
objects, a tuple might only contains one 'variable' field,
typically the last one. If the encoding of more than one field
are 'variable', the first ones should be wrapped with
[dynamic_size].
@raise Invalid_argument if more than one field is a variable one. *)
val tup1 : 'f1 encoding -> 'f1 encoding
val tup2 : 'f1 encoding -> 'f2 encoding -> ('f1 * 'f2) encoding
val tup3 :
'f1 encoding -> 'f2 encoding -> 'f3 encoding -> ('f1 * 'f2 * 'f3) encoding
val tup4 :
'f1 encoding ->
'f2 encoding ->
'f3 encoding ->
'f4 encoding ->
('f1 * 'f2 * 'f3 * 'f4) encoding
val tup5 :
'f1 encoding ->
'f2 encoding ->
'f3 encoding ->
'f4 encoding ->
'f5 encoding ->
('f1 * 'f2 * 'f3 * 'f4 * 'f5) encoding
val tup6 :
'f1 encoding ->
'f2 encoding ->
'f3 encoding ->
'f4 encoding ->
'f5 encoding ->
'f6 encoding ->
('f1 * 'f2 * 'f3 * 'f4 * 'f5 * 'f6) encoding
val tup7 :
'f1 encoding ->
'f2 encoding ->
'f3 encoding ->
'f4 encoding ->
'f5 encoding ->
'f6 encoding ->
'f7 encoding ->
('f1 * 'f2 * 'f3 * 'f4 * 'f5 * 'f6 * 'f7) encoding
val tup8 :
'f1 encoding ->
'f2 encoding ->
'f3 encoding ->
'f4 encoding ->
'f5 encoding ->
'f6 encoding ->
'f7 encoding ->
'f8 encoding ->
('f1 * 'f2 * 'f3 * 'f4 * 'f5 * 'f6 * 'f7 * 'f8) encoding
val tup9 :
'f1 encoding ->
'f2 encoding ->
'f3 encoding ->
'f4 encoding ->
'f5 encoding ->
'f6 encoding ->
'f7 encoding ->
'f8 encoding ->
'f9 encoding ->
('f1 * 'f2 * 'f3 * 'f4 * 'f5 * 'f6 * 'f7 * 'f8 * 'f9) encoding
val tup10 :
'f1 encoding ->
'f2 encoding ->
'f3 encoding ->
'f4 encoding ->
'f5 encoding ->
'f6 encoding ->
'f7 encoding ->
'f8 encoding ->
'f9 encoding ->
'f10 encoding ->
('f1 * 'f2 * 'f3 * 'f4 * 'f5 * 'f6 * 'f7 * 'f8 * 'f9 * 'f10) encoding
(** Create a large tuple encoding from two smaller ones.
@raise Invalid_argument if both values are not tuples or if both
tuples contains a variable field. *)
val merge_tups : 'a1 encoding -> 'a2 encoding -> ('a1 * 'a2) encoding
(** {3 Sum descriptors} *)
(** A partial encoding to represent a case in a variant type. Hides
the (existentially bound) type of the parameter to the specific
case, providing its encoder, and converter functions to and from
the union type. *)
type 't case
type case_tag = Tag of int | Json_only
(** A sum descriptor can be optimized by providing a specific
[matching_function] which efficiently determines in which case
some value of type ['a] falls.
Note that in general you should use a total function (i.e., one defined
over the whole of the ['a] type) for the [matching_function]. However, in
the case where you have a good reason to use a partial function, you should
raise {!No_case_matched} in the dead branches. Reasons why you may want to
do so include:
- ['a] is an open variant and you will complete the matching function
later, and
- there is a code invariant that guarantees that ['a] is not fully
inhabited. *)
type 'a matching_function = 'a -> match_result
and match_result
(** [matched t e u] represents the fact that a value is tagged with [t] and
carries the payload [u] which can be encoded with [e].
The optional argument [tag_size] must match the one passed to the
{!matching} function [matched] is called inside of.
An example is given in the documentation of {!matching}.
@raise [Invalid_argument] if [t < 0]
@raise [Invalid_argument] if [t] does not fit in [tag_size] *)
val matched : ?tag_size:tag_size -> int -> 'a encoding -> 'a -> match_result
(** Encodes a variant constructor. Takes the encoding for the specific
parameters, a recognizer function that will extract the parameters
in case the expected case of the variant is being serialized, and
a constructor function for deserialization.
The tag must be less than the tag size of the union in which you use the case.
An optional tag gives a name to a case and should be used to maintain
compatibility.
An optional name for the case can be provided, which is used in the binary
documentation.
@raise [Invalid_argument] if [case_tag] is [Tag t] with [t < 0] *)
val case :
title:string ->
?description:string ->
case_tag ->
'a encoding ->
('t -> 'a option) ->
('a -> 't) ->
't case
(** Create a single encoding from a series of cases.
In JSON, all cases are tried one after the other using the [case list]. The
caller is responsible for avoiding collisions. If there are collisions
(i.e., if multiple cases produce the same JSON output) then the encoding
and decoding processes might not be inverse of each other. In other words,
[destruct e (construct e v)] may not be equal to [v].
In binary, a prefix tag is added to discriminate quickly between
cases. The default is [`Uint8] and you must use a [`Uint16] if
you are going to have more than 256 cases.
The matching function is used during binary encoding of a value
[v] to efficiently determine which of the cases corresponds to
[v]. The case list is used during decoding to reconstruct a value based on
the encoded tag. (Decoding is optimised internally: tag look-up has a
constant cost.)
The caller is responsible for ensuring that the [matching_function] and the
[case list] describe the same encoding. If they describe different
encodings, then the decoding and encoding processes will not be inverses of
each others. In other words, [of_bytes e (to_bytes e v)] will not be equal
to [v].
If you do not wish to be responsible for this, you can use the unoptimised
{!union} that uses a [case list] only (see below). Beware that in {!union}
the complexity of the encoding is linear in the number of cases.
Following: a basic example use. Note that the [matching_function] uses the
same tags, payload conversions, and payload encoding as the [case list].
{[
type t = A of string | B of int * int | C
let encoding_t =
(* Tags and payload encodings for each constructors *)
let a_tag = 0 and a_encoding = string in
let b_tag = 1 and b_encoding = obj2 (req "x" int) (req "y" int) in
let c_tag = 2 and c_encoding = unit in
matching
(* optimised encoding function *)
(function
| A s -> matched a_tag a_encoding s
| B (x, y) -> matched b_tag b_encoding (x, y)
| C -> matched c_tag c_encoding ())
(* decoding case list *)
[
case ~title:"A"
(Tag a_tag)
a_encoding
(function A s -> Some s | _ -> None) (fun s -> A s);
case ~title:"B"
(Tag b_tag)
b_encoding
(function B (x, y) -> Some (x, y) | _ -> None) (fun (x, y) -> B (x, y));
case ~title:"C"
(Tag c_tag)
c_encoding
(function C -> Some () | _ -> None) (fun () -> C);
]
]}
@raise [Invalid_argument] if it is given an empty [case list]
@raise [Invalid_argument] if there are more than one [case] with the same
[tag] in the [case list]
@raise [Invalid_argument] if there are more cases in the [case list] than
can fit in the [tag_size] *)
val matching :
?tag_size:tag_size -> 't matching_function -> 't case list -> 't encoding
(** Same as matching except that the matching function is
a linear traversal of the cases.
@raise [Invalid_argument] if it is given an empty [case list]
@raise [Invalid_argument] if there are more than one [case] with the same
[tag] in the [case list]
@raise [Invalid_argument] if there are more cases in the [case list] than
can fit in the [tag_size] *)
val union : ?tag_size:tag_size -> 't case list -> 't encoding
(** {3 Specialized descriptors} *)
(** Encode enumeration via association list
- represented as a string in JSON and
- represented as an integer representing the element's position
in the list in binary. The integer size depends on the list size.*)
val string_enum : (string * 'a) list -> 'a encoding
(** Create encodings that produce data of a fixed length when binary encoded.
See the preamble for an explanation. *)
module Fixed : sig
(** @raise Invalid_argument if the argument is less or equal to zero. *)
val string : int -> string encoding
(** @raise Invalid_argument if the argument is less or equal to zero. *)
val bytes : int -> bytes encoding
(** [add_padding e n] is a padded version of the encoding [e]. In Binary,
there are [n] null bytes ([\000]) added after the value encoded by [e].
In JSON, padding is ignored.
@raise Invalid_argument if [n <= 0]. *)
val add_padding : 'a encoding -> int -> 'a encoding
(** [list n e] is an encoding for lists of exactly [n] elements. If a list
of more or fewer elements is provided, then the encoding fails with the
[write_error List_invalid_length]. For decoding, it can fail with
[read_error Not_enough_data] or [read_error Extra_bytes], or it may
cause other failures further down the line when the AST traversal
becomes out-of-sync with the underlying byte-stream traversal.
The difference of the errors being used when encoding and decoding is
because when encoding we have access to the list and we can check the
actual length, whereas when decoding we only see bytes, sometimes too
many, sometimes not enough.
This encoding has a narrow set of possible applications because it is
very restrictive. Still, it can to:
- mirror static guarantees about the length of some lists,
- special-case some common lengths of typical input in a union (see
example below),
- other ends.
{[
type expr =
| Op of string * expr list (* most commonly 1 or 2 operands *)
| Literal of string
let expr_encoding =
mu "expr" (fun e ->
union [
case ~title:"op-nonary" (Tag 0)
string
(function Op (op, []) -> Some op | _ -> None)
(fun op -> Op (op, []));
case ~title:"op-unary" (Tag 1)
(tup2 string (Fixed.list 1 e))
(function Op (op, ([_]) as operand) -> Some (op, operand) | _ -> None)
(fun (op, operand) -> Op (op, operand));
case ~title:"op-binary" (Tag 2)
(tup2 string (Fixed.list 2 e))
(function Op (op, ([_;_]) as operand) -> Some (op, operand) | _ -> None)
(fun (op, operand) -> Op (op, operand));
case ~title:"op-moreary" (Tag 3)
(tup2 string (list e))
(function Op (op, operand) -> Some (op, operand) | _ -> None)
(fun (op, operand) -> Op (op, operand));
case ~title:"literal" (Tag 4)
string
(function Literal l -> Some l | _ -> None)
(fun l -> Literal l);
]
)
]}
Interestingly, the cases for known lengths can be generated
programmatically.
@raise Invalid_argument if the argument [n] is less or equal to zero.
@raise Invalid_argument if the argument [e] is a [`Variable]-size
encoding or a zero-byte encoding. *)
val list : int -> 'a encoding -> 'a list encoding
(** See [list] above.
@raise Invalid_argument if the argument [n] is less or equal to zero.
@raise Invalid_argument if the argument [e] is a [`Variable]-size
encoding or a zero-byte encoding. *)
val array : int -> 'a encoding -> 'a array encoding
end
(** Create encodings that produce data of a variable length when binary encoded.
See the preamble for an explanation. *)
module Variable : sig
val string : string encoding
val bytes : bytes encoding
(** @raise Invalid_argument if the encoding argument is variable length
or may lead to zero-width representation in binary. *)
val array : ?max_length:int -> 'a encoding -> 'a array encoding
(** @raise Invalid_argument if the encoding argument is variable length
or may lead to zero-width representation in binary. *)
val list : ?max_length:int -> 'a encoding -> 'a list encoding
end
module Bounded : sig
(** Encoding of a string whose length does not exceed the specified length.
The size field uses the smallest integer that can accommodate the
maximum size - e.g., [`Uint8] for very short strings, [`Uint16] for
longer strings, etc.
Attempting to construct a string with a length that is too long causes
an [Invalid_argument] exception. *)
val string : int -> string encoding
(** See {!string} above. *)
val bytes : int -> bytes encoding
end
(** Mark an encoding as being of dynamic size.
Forces the size to be stored alongside content when needed.
Typically used to combine two variable encodings in a same
objects or tuple, or to use a variable encoding in an array or a list. *)
val dynamic_size :
?kind:[`Uint30 | `Uint16 | `Uint8] -> 'a encoding -> 'a encoding
(** [check_size size encoding] ensures that the binary encoding
of a value will not be allowed to exceed [size] bytes. The reader
and the writer fails otherwise. This function do not modify
the JSON encoding. *)
val check_size : int -> 'a encoding -> 'a encoding
(** Define different encodings for JSON and binary serialization. *)
val splitted : json:'a encoding -> binary:'a encoding -> 'a encoding
(** Combinator for recursive encodings.
Notice that the function passed to [mu] must be pure. Otherwise,
the behavior is unspecified.
A stateful recursive encoding can still be put under a [delayed]
combinator to make sure that a new encoding is generated each
time it is used. Caching the encoding generation when the state
has not changed is then the responsability of the client.
*)
val mu :
string ->
?title:string ->
?description:string ->
('a encoding -> 'a encoding) ->
'a encoding
(** {3 Documenting descriptors} *)
(** Give a name to an encoding and optionally
add documentation to an encoding. *)
val def :
string -> ?title:string -> ?description:string -> 't encoding -> 't encoding
(** See {!lazy_encoding} below.*)
type 'a lazy_t
(** Combinator to have a part of the binary encoding lazily deserialized.
This is transparent on the JSON side. *)
val lazy_encoding : 'a encoding -> 'a lazy_t encoding
(** Force the decoding (memoized for later calls), and return the
value if successful. *)
val force_decode : 'a lazy_t -> 'a option
(** Obtain the bytes without actually deserializing. Will serialize
and memoize the result if the value is not the result of a lazy
deserialization. *)
val force_bytes : 'a lazy_t -> bytes
(** Make a lazy value from an immediate one. *)
val make_lazy : 'a encoding -> 'a -> 'a lazy_t
(** Apply on structure of lazy value, and combine results *)
val apply_lazy :
fun_value:('a -> 'b) ->
fun_bytes:(bytes -> 'b) ->
fun_combine:('b -> 'b -> 'b) ->
'a lazy_t ->
'b
module Compact : sig
(** This module provides specialized encoding combinators that are
implemented to reduce the size of the serialization result.
The main trick this module relies on is the notion of “shared tags”.
In [Data_encoding], the [union] combinator uses (at least) one byte
every time it is used, to “tag” the output and distinguish between
various disjunction cases. As a consequence, if [n] [union] are
composed together to define one encoding, (at least) [n] bytes are
being allocated. However, in practice, only few bits are used in
each tags, which means the rest is “wasted.”
As an example, consider this type:
{[
type t =
| T1 of { f1 : int option; f2 : (int, bool) Either.t }
| T2 of { f3: int }
]}
A value of [t] using the constructor [T1] will be serialized into
a binary array of this form:
{v
┌────────┬─────────┬─────────────┬─────────┬─────────────┐
│ tag(t) │ tag(f1) │ payload(f1) │ tag(f2) │ payload(f2) │
└────────┴─────────┴─────────────┴─────────┴─────────────┘
1 byte 1 byte N bytes 1 byte M bytes
v}
Where [tag(f)] is a value used by [Data_encoding] to distinguish
between several encoding alternatives for [f], and [payload(f)] is
the resulting binary array.
For both [option] and [Either.t], the tag of the encoding only uses
one bit in practice. Which means that for [T1], encoding the pair
[(f1, f2)] needs two bits, but the default approach of
[Data_encoding] uses two {i bytes} instead. Similarly, to
distinguish between [T1] and [T2] needs one bit, but the default
approach is to use an additional tag (one additional {i byte}).
This module provides an approach to tackle this issue, by
allocating only one tag ({i i.e.}, one byte) that is used to store
the useful bits to distinguish between the disjunction cases. We
call this tag the “shared tag” of the encoding. The bits of the
shared tag describes precisely the layout of the encoded data.
For instance, considering a compact encoding for [t], the third
bit of the tag can be used to distinguish between [T1] and [T2].
In case the third bit is 0, the first bit of the tag determines
the case of [option], and the second the case of [Either.t].
As a consequence the resulting binary array for the constructor
[T1] is, using
- [_] to represent meaningless bits,
- [0] and [1] to represent actual bit values,
- [e] to represent the bit used to distinguish the [Either] case of [f2], and
- [o] to represent the bit used to distinguish the [Option] case of [f1]:
{v
┌──────────┬─────────────┬─────────────┐
│ _____0eo │ payload(f1) │ payload(f2) │
└──────────┴─────────────┴─────────────┘
1 byte N bytes M bytes
v}
while the resulting binary array for the constructor [T2] is
{v
┌──────────┬─────────────┐
│ _____100 │ payload(f3) │
└──────────┴─────────────┘
1 byte N bytes
v} *)
(** The description of a compact encoding. *)
type 'a t
(** Turn a compact encoding into a regular {!Data_encoding.t}.
@param tag_size controls the size of the tag used to discriminate the
values. Note that in data-encoding, all the writes and reads are byte
aligned so the tag must fit in either 0 ([`Uint0]), 1 ([`Uint8]), or 2
([`Uint16]) bytes.
The default is [`Uint0], i.e., no tag at all. This is can only represent
values which use 0 bits of tags.
It is recommended to set the [tag_size] explicitly.
@raise Invalid_argument if the shared tags cannot fit in [tag_size]
space. *)
val make : ?tag_size:[`Uint0 | `Uint8 | `Uint16] -> 'a t -> 'a encoding
(** [tag_bit_count c] is the number of bits of tag that a compact encoding
uses. *)
val tag_bit_count : 'a t -> int
(** {1 Combinators} *)
(** Similarly to [Data_encoding], we provide various combinators to
compose compact encoding together. *)
(** {2 Base types} *)
(** A type with no inhabitant. *)
type void
(** A compact encoding used to denote an impossible case inside of
conjunction operators such as [union].
Uses 0 bit of tag. *)
val void : void t
(** [refute x] can be used to refute a branch of a [match] which
exhibits a value of type [void]. *)
val refute : void -> 'a
(** A compact encoding of the singleton value [unit], which has zero
memory footprint.
Uses zero (0) bits of tag. *)
val unit : unit t
(** Efficient encoding of boolean values. It uses one (1) bit in the
shared tag, and zero bit in the payload. *)
val bool : bool t
(** [payload encoding] unconditionally uses [encoding] in the
payload, and uses zero (0) bit in the shared tag. *)
val payload : 'a encoding -> 'a t
(** Uses one (1) bit in the tag to encode an option. *)
val option : 'a t -> 'a option t
(** {2 Conversion} *)
(** [conv ?json f g e] reuses the encoding [e] for type [b] to encode
a type [a] using the isomorphism [(f, g)]. The optional argument
allows to overwrite the encoding used for JSON, in place of the
one computed by default. *)
val conv : ?json:'a encoding -> ('a -> 'b) -> ('b -> 'a) -> 'b t -> 'a t
(** {2 Conjunctions} *)
(** [tup1 e] wraps the underlying encoding of [e] in a [tup1] (from the
parent module). This is only useful in that, provided you use
[make ~tag_size:`Uint0] to translate the returned compact encoding, it
allows you to call [merge_tups] on it.
Uses as many bits of tag as [e]. *)
val tup1 : 'a t -> 'a t
(** [tup2 e1 e2] concatenates the shared tags and payloads of [e1] and
[e2].
Uses as many bits of tags as the sum of the tags used by its arguments. *)
val tup2 : 'a t -> 'b t -> ('a * 'b) t
(** [tup3 e1 e2 e3] concatenates the shared tags and payloads of [e1],
[e2], and [e3].
Uses as many bits of tags as the sum of the tags used by its arguments. *)
val tup3 : 'a t -> 'b t -> 'c t -> ('a * 'b * 'c) t
(** [tup4 e1 e2 e3 e4] concatenates the shared tags and payloads of
[e1], [e2], [e3] and [e4].
Uses as many bits of tags as the sum of the tags used by its arguments. *)
val tup4 : 'a t -> 'b t -> 'c t -> 'd t -> ('a * 'b * 'c * 'd) t
val tup5 :
'f1 t -> 'f2 t -> 'f3 t -> 'f4 t -> 'f5 t -> ('f1 * 'f2 * 'f3 * 'f4 * 'f5) t
val tup6 :
'f1 t ->
'f2 t ->
'f3 t ->
'f4 t ->
'f5 t ->
'f6 t ->
('f1 * 'f2 * 'f3 * 'f4 * 'f5 * 'f6) t
val tup7 :
'f1 t ->
'f2 t ->
'f3 t ->
'f4 t ->
'f5 t ->
'f6 t ->
'f7 t ->
('f1 * 'f2 * 'f3 * 'f4 * 'f5 * 'f6 * 'f7) t
val tup8 :
'f1 t ->
'f2 t ->
'f3 t ->
'f4 t ->
'f5 t ->
'f6 t ->
'f7 t ->
'f8 t ->
('f1 * 'f2 * 'f3 * 'f4 * 'f5 * 'f6 * 'f7 * 'f8) t
val tup9 :
'f1 t ->
'f2 t ->
'f3 t ->
'f4 t ->
'f5 t ->
'f6 t ->
'f7 t ->
'f8 t ->
'f9 t ->
('f1 * 'f2 * 'f3 * 'f4 * 'f5 * 'f6 * 'f7 * 'f8 * 'f9) t
val tup10 :
'f1 t ->
'f2 t ->
'f3 t ->
'f4 t ->
'f5 t ->
'f6 t ->
'f7 t ->
'f8 t ->
'f9 t ->
'f10 t ->
('f1 * 'f2 * 'f3 * 'f4 * 'f5 * 'f6 * 'f7 * 'f8 * 'f9 * 'f10) t
type 'a field
(** [req "f" compact] can be used in conjunction with [objN] to create
compact encoding with more readable JSON encoding, as an
alternative of [tupN]. The JSON output is a dictionary which
contains the field [f] with a value encoded using [compact]. *)
val req : string -> 'a t -> 'a field
(** Same as {!req}, but the field is optional.
An [objN] compact encoding uses as many bits of tags as its number of
[opt] fields. *)
val opt : string -> 'a t -> 'a option field
(** [obj1] can be used in conjunction with [req] or [opt] to produce
more readable JSON outputs.
Uses as many bits of tags as there are [opt] fields in its arguments. *)
val obj1 : 'a field -> 'a t
(** An alternative to [tup2] which can be used in conjunction with
{!req} and {!opt} to produce more readable JSON outputs based on
dictionary.
Uses as many bits of tags as there are [opt] fields in its arguments. *)
val obj2 : 'a field -> 'b field -> ('a * 'b) t
(** An alternative to [tup3] which can be used in conjunction with
{!req} and {!opt} to produce more readable JSON outputs based on
dictionary.
Uses as many bits of tags as there are [opt] fields in its arguments. *)
val obj3 : 'a field -> 'b field -> 'c field -> ('a * 'b * 'c) t
(** An alternative to [tup4] which can be used in conjunction with
{!req} and {!opt} to produce more readable JSON outputs based on
dictionary.
Uses as many bits of tags as there are [opt] fields in its arguments. *)
val obj4 :
'a field -> 'b field -> 'c field -> 'd field -> ('a * 'b * 'c * 'd) t
val obj5 :
'f1 field ->
'f2 field ->
'f3 field ->
'f4 field ->
'f5 field ->
('f1 * 'f2 * 'f3 * 'f4 * 'f5) t
val obj6 :
'f1 field ->
'f2 field ->
'f3 field ->
'f4 field ->
'f5 field ->
'f6 field ->
('f1 * 'f2 * 'f3 * 'f4 * 'f5 * 'f6) t
val obj7 :
'f1 field ->
'f2 field ->
'f3 field ->
'f4 field ->
'f5 field ->
'f6 field ->
'f7 field ->
('f1 * 'f2 * 'f3 * 'f4 * 'f5 * 'f6 * 'f7) t
val obj8 :
'f1 field ->
'f2 field ->
'f3 field ->
'f4 field ->
'f5 field ->
'f6 field ->
'f7 field ->
'f8 field ->
('f1 * 'f2 * 'f3 * 'f4 * 'f5 * 'f6 * 'f7 * 'f8) t
val obj9 :
'f1 field ->
'f2 field ->
'f3 field ->
'f4 field ->
'f5 field ->
'f6 field ->
'f7 field ->
'f8 field ->
'f9 field ->
('f1 * 'f2 * 'f3 * 'f4 * 'f5 * 'f6 * 'f7 * 'f8 * 'f9) t
val obj10 :
'f1 field ->
'f2 field ->
'f3 field ->
'f4 field ->
'f5 field ->
'f6 field ->
'f7 field ->
'f8 field ->
'f9 field ->
'f10 field ->
('f1 * 'f2 * 'f3 * 'f4 * 'f5 * 'f6 * 'f7 * 'f8 * 'f9 * 'f10) t
(** A compact encoding for [int32] values. It uses 2 bits in the
shared tag, to determine how many bytes are used in the payload:
{ul {li [00]: from 0 to 255, one byte.}
{li [01]: from 256 to 65,535, two bytes.}
{li [10]: from 65,536 to [Int32.max_int] and for negative values, four bytes.}}
Note that by itself, this compact encoding is not necessarily more
economical in space. However, in combination with other compact
encodings (say, when you have two bits of tag to spare anyway) or given
a very skewed distribution of values (say, when the vast majority of
your values are in the 0–255 interval), then it can help you save some
space.
Uses two (2) bits of tag. *)
val int32 : int32 t
(** A compact encoding for [int64] values. It uses 2 bits in the
shared tag, to determine how many bytes are used in the payload:
{ul {li [00]: from 0 to 255, one byte.}
{li [01]: from 256 to 65,535, two bytes.}
{li [10]: from 65,536 to 4,294,967,295 four bytes.}
{li [11]: from 4,294,967,295 and for negative values eight bytes.}}
See {!int32} for usage recommendations.
Uses two (2) bits of tag. *)
val int64 : int64 t
(** [list ~bits:n encoding] uses [n] bits in the shared tag to encode the
size of small lists.
For instance, [list ~bits:2 encoding],
{ul {li [00]: the payload is empty, because it is the empty list}
{li [01]: the singleton list, whose element is encoded using
[encoding].}
{li [10]: a list of two elements encoded with [encoding]}
{li [11]: a list of more than two elements, prefixed with its
encoded size (i.e., the number of bytes it takes to represent
the whole value) (which uses 4 bytes)}}
With [~bits:3], lists of 0 to 6 items are encoded with tags [000] to
[110], and lists of 7 or more are encoded with tag [111] and the
length.
Uses [n] bits of tags. *)
val list : bits:int -> 'a encoding -> 'a list t
(** {2 Disjunctions} *)
type 'a case
(** Usage: [case name encode decode encoding]
Intended to be used inside a [union]. *)
val case :
title:string ->
?description:string ->
'b t ->
('a -> 'b option) ->
('b -> 'a) ->
'a case
(** [union cases] creates a new compact encoding to encompass a
disjunction of cases.
The value uses some tag bits to distinguish the different cases of the
union (see discussion of parameter [union_tag_bits]) and some tag bits
(potentially 0) to distinguish the values within a case (see discussion
of parameter [cases_tag_bits]).
E.g., Given [type t = A of bool | B of int option] and the encoding
{v
let c =
union [
case "A" (function A b -> Some b | _ -> None) (fun b -> A b) bool;
case "B" (function B i -> Some i | _ -> None) (fun i -> B b) (option (payload int));
in
make ~tag_size:`Uint8 c
v}
then a value can have either of the following 4 tags:
- 0b00000000: case [A], [false]
- 0b00000001: case [A], [true]
- 0b00000010: case [B], [Some] (a payload of 4 bytes follows)
- 0b00000011: case [B], [None]
In other words, the second bit of this tag is used to discriminate the
cases of the union, whilst the first bit is used to discriminate within
each case.
Note that the compact union can be combined with more compact encoding
before being passed to [make] in which case the two bits of tags will be
combined with the tags of the other compact encodings. E.g.,
[make ~tag_size:`Uint8 (tup2 c c)].
@param union_tag_bits is the number of bits used to distinguish the
different cases of the union. For example, if the union has 4 cases
(i.e., if [List.length cases = 4]) then you can use [~union_tag_bits:2].
If not provided explicitly, [union_tag_bits] is inferred: it is set to
the smallest value which can accommodate the provided [cases].
It is recommended to set [union_tag_bits] explicitly.
You can over-provision the [union_tag_bits] if you expect the
[cases] to grow in the future.
@raise Invalid_argument if the value passed for [union_tag_bits] is not
sufficient to distinguish between the [cases].
@param cases_tag_bits is the number of bits that each of the [cases] can
use. This is only useful if the cases use more than 0 bits of tag.
It is recommended to set [cases_tag_bits] explicitly if you need the
layout to be stable even if the [cases] or one of its element changes.
You can over-provision the [cases_tag_bits] if you expect one of the
cases to change to use more bits of tag or if you expect that a new case
using more tag bits will be added in the future.
E.g., passing [~cases_tag_bits:7] to the [union] in the example above
will cause the values to be represented as follows:
- 0b00000000: case [A], [false]
- 0b00000001: case [A], [true]
- 0b10000000: case [B], [Some] (a payload of 4 bytes follows)
- 0b10000001: case [B], [None]
@raise Invalid_argument if one of the elements of [cases] needs more
than [cases_tag_bits] bits of tag.
E.g., [union ~cases_tag_bits:0 [case "Bool" Option.some Fun.id bool]]
raises [Invalid_argument] because {!bool} uses one bit of tag which is
more than [0].
@raise Invalid_argument if [cases] is empty. *)
val union : ?union_tag_bits:int -> ?cases_tag_bits:int -> 'a case list -> 'a t
(** [void_case ~title] is an impossible case. It is provided so you can add
unused tags within a union. E.g.,
[union [case _; void_case ~title:"reserved-for-v04-compatibility"; case _; case _]]
uses two bits of tag for the discrimination of the union,
but the tag [01] is unused (reserved for some version compatibility). *)
val void_case : title:string -> 'a case
(** [or_int32 ~i32_title ~alt_title ?alt_description c] creates a new
compact encoding for the disjunction of
any type [a] (see {!val-case}) with [int32]. It uses the same number
of bits as {!int32}, that is 2, and uses the spare tag ([11]) within
this size for values of type [a].
@param i32_title is used as a prefix to each of the int32 cases' title.
@param alt_title is used as the title of the alt case. (See {!val-case} and
{!union} for details.)
@param alt_description is used as the description of the alternate case.
(See {!val-case} and {!union} for details.) *)
val or_int32 :
int32_title:string ->
alt_title:string ->
?alt_description:string ->
'a encoding ->
(int32, 'a) Either.t t
(** {1 Custom} *)
(** This module can be used to write compact encoding for complex types
without relying on the existing combinators. *)
module Custom : sig
type tag = int
(** Combine multiple tags; will throw an error if the total length of
the tags is more than 16. *)
val join_tags : (tag * int) list -> tag
module type S = sig
(** The type of [input] this module allows to encode. *)
type input
(** The various ways to efficiently encode [input]. *)
type layout
(** The list of layouts available to encode [input]. *)
val layouts : layout list
(** The number of bits necessary to distinguish between the various
layouts. *)
val tag_len : int
(** [tag layout] computes the tag of {!Data_encoding.union} to be
used to encode values classified as [layout].
{b Warning:} It is expected that [tag layout < 2^tag_len - 1]. *)
val tag : layout -> tag
(** [partial_encoding layout] returns the encoding to use for values
classified as [layout].
This encoding can be partial in the sense that it may fail (it
will raise an [Invalid_argument]) for some values of [x].
However, it is expected that [partial_encoding (classify x) x]
will always succeed. *)
val partial_encoding : layout -> input encoding
(** [classify x] returns the layout to be used to encode [x]. *)
val classify : input -> layout
(** The encoding to use when targeting a JSON output. *)
val json_encoding : input encoding
end
(** [make (module M)] is a compact encoding for the type of [M.input].
The JSON representation is entirely determined by [M.json_encoding].
The binary representation is determined as follows.
- A value [v : M.input] is classified into a layout [l] by [M.classify v].
- A tag [M.tag l] is used (which may be combined with the tags of other
compact encodings as described before).
- The payload is the same bytes as can be found in the string returned by
[Data_encoding.Binary.to_string (M.partial_encoding l) v].
In other words, the tag of a value is [M.(tag (layout v))] and the payload
of a value is [M.(partial_encoding (layout v) v)].
It is the user's responsibility to ensure that all the values of [M]
follow the invariants documented in {!module-type-S}. *)
val make : (module S with type input = 'a) -> 'a t
end
end
type 'a compact = 'a Compact.t
val json : json encoding
val json_schema : json_schema encoding
module Json : sig
val schema : ?definitions_path:string -> 'a encoding -> json_schema
(** Construct a JSON object from an encoding. *)
val construct :
?include_default_fields:[`Always | `Auto | `Never] ->
't encoding ->
't ->
json
(** Destruct a JSON object into a value.
Fail with an exception if the JSON object and encoding do not match.
@param [bson_relaxation] (default to [false]) works around a limitation of
the BSON format. Specifically, in BSON, top-level arrays are represented as
number-indexed objects. When [bson_relaxation] is [true], then the
destructor attempts to automatically translate the indistinguishable
values as guided by the encoding. *)
val destruct : ?bson_relaxation:bool -> 't encoding -> json -> 't
(** JSON Error *)
type path = path_item list
(** A set of accessors that point to a location in a JSON object. *)
and path_item =
[ `Field of string (** A field in an object. *)
| `Index of int (** An index in an array. *)
| `Star (** Any / every field or index. *)
| `Next (** The next element after an array. *) ]
(** Exception raised by destructors, with the location in the original
JSON structure and the specific error. *)
exception Cannot_destruct of (path * exn)
(** Unexpected kind of data encountered, with the expectation. *)
exception Unexpected of string * string
(** Some {!val:union} couldn't be destructed, with the reasons for each {!val:case}. *)
exception No_case_matched of exn list
(** Array of unexpected size encountered, with the expectation. *)
exception Bad_array_size of int * int
(** Missing field in an object. *)
exception Missing_field of string
(** Supernumerary field in an object. *)
exception Unexpected_field of string
val print_error :
?print_unknown:(Format.formatter -> exn -> unit) ->
Format.formatter ->
exn ->
unit
(** Helpers for writing encoders. *)
val cannot_destruct : ('a, Format.formatter, unit, 'b) format4 -> 'a
val wrap_error : ('a -> 'b) -> 'a -> 'b
val pp : Format.formatter -> json -> unit
end
module Binary : sig
(** Compute the expected length of the binary representation of a value.
@raise Write_error in case some size/length invariants are broken.
*)
val length : 'a encoding -> 'a -> int
(** Returns the size of the binary representation that the given
encoding might produce, only when this size does not depends of the value
itself.
E.g., [fixed_length (tup2 int64 (Fixed.string 2))] is [Some _]
E.g., [fixed_length (result int64 (Fixed.string 2))] is [None]
E.g., [fixed_length (list (tup2 int64 (Fixed.string 2)))] is [None] *)
val fixed_length : 'a encoding -> int option
(** Returns the maximum size of the binary representation that the given
encoding might produce, only when this maximum size does not depends of
the value itself.
E.g., [maximum_length (tup2 int64 (Fixed.string 2))] is [Some _]
E.g., [maximum_length (result int64 (Fixed.string 2))] is [Some _]
E.g., [maximum_length (list (tup2 int64 (Fixed.string 2)))] is [None]
Note that the function assumes that recursive encodings (build using [mu])
are used for recursive data types. As a result, [maximum_length] will
return [None] if given a recursive encoding.
If there are static guarantees about the maximum size of the
representation for values of a given type, you can wrap your encoding in
[check_size]. This will cause [maximum_length] to return [Some _]. *)
val maximum_length : 'a encoding -> int option
val of_bytes_opt : 'a encoding -> bytes -> 'a option
val of_string_opt : 'a encoding -> string -> 'a option
val to_bytes_opt : ?buffer_size:int -> 'a encoding -> 'a -> bytes option
(** [to_bytes_exn enc v] is equivalent to [to_bytes enc v], except
@raise [Write_error] instead of returning [None] in case of error. *)
val to_bytes_exn : ?buffer_size:int -> 'a encoding -> 'a -> bytes
val to_string_opt : ?buffer_size:int -> 'a encoding -> 'a -> string option
(** @raise [Write_error] instead of returning [None] in case of error. *)
val to_string_exn : ?buffer_size:int -> 'a encoding -> 'a -> string
end
end
# 32 "v5.in.ml"
module Raw_hashes : sig
# 1 "v5/raw_hashes.mli"
val blake2b : bytes -> bytes
val sha256 : bytes -> bytes
val sha512 : bytes -> bytes
val keccak256 : bytes -> bytes
val sha3_256 : bytes -> bytes
val sha3_512 : bytes -> bytes
end
# 34 "v5.in.ml"
module Compare : sig
# 1 "v5/compare.mli"
(** {1 [Compare]}
Monomorphic comparison for common ground types and common type constructors.
[Compare] provides a module signature for the standard comparison functions
and operators as well as modules of that signature for the common OCaml
ground types ([int], [bool], etc.) and type constructors ([list], [option],
etc.).
[Compare] also provides some additional helpers for comparison-related
tasks. *)
(** {2 Signatures and a functor} *)
(** [COMPARABLE] is a signature for basic comparison. It is used only for
instantiating full comparison modules of signature {!module-type-S} via the
functor {!Make}. *)
module type COMPARABLE = sig
type t
val compare : t -> t -> int
end
(** [S] is a signature for a fully-fledge comparison module. It includes all the
functions and operators derived from a [compare] function. *)
module type S = sig
type t
(** [x = y] iff [compare x y = 0] *)
val ( = ) : t -> t -> bool
(** [x <> y] iff [compare x y <> 0] *)
val ( <> ) : t -> t -> bool
(** [x < y] iff [compare x y < 0] *)
val ( < ) : t -> t -> bool
(** [x <= y] iff [compare x y <= 0] *)
val ( <= ) : t -> t -> bool
(** [x >= y] iff [compare x y >= 0] *)
val ( >= ) : t -> t -> bool
(** [x > y] iff [compare x y > 0] *)
val ( > ) : t -> t -> bool
(** [compare] an alias for the functor parameter's [compare] function *)
val compare : t -> t -> int
(** [equal x y] iff [compare x y = 0] *)
val equal : t -> t -> bool
(** [max x y] is [x] if [x >= y] otherwise it is [y] *)
val max : t -> t -> t
(** [min x y] is [x] if [x <= y] otherwise it is [y] *)
val min : t -> t -> t
end
module Make (P : COMPARABLE) : S with type t := P.t
(** {2 Base types}
The specialised comparison and all the specialised functions and operators
on the base types are compatible with the polymorphic comparison and all the
polymorphic functions and operators from the {!Stdlib}. *)
module Char : S with type t = char
module Bool : S with type t = bool
(** [Int] is a comparison module. Out of performance concerns, the signature
actually contains compiler builtins ([external]) rather than [val]. *)
module Int : sig
type t = int
external ( = ) : int -> int -> bool = "%equal"
external ( <> ) : int -> int -> bool = "%notequal"
external ( < ) : int -> int -> bool = "%lessthan"
external ( > ) : int -> int -> bool = "%greaterthan"
external ( <= ) : int -> int -> bool = "%lessequal"
external ( >= ) : int -> int -> bool = "%greaterequal"
external compare : int -> int -> int = "%compare"
val max : int -> int -> int
val min : int -> int -> int
external equal : int -> int -> bool = "%equal"
end
module Int32 : S with type t = int32
module Uint32 : S with type t = int32
module Int64 : S with type t = int64
module Uint64 : S with type t = int64
module String : S with type t = string
module Bytes : S with type t = bytes
(** [Z] is a comparison module for Zarith numbers. *)
module Z : S with type t = Z.t
(** {2 Type constructors}
Provided the functor argument(s) are compatible with the polymorphic
comparison of the {!Stdlib}, then the specialised comparison and all the
specialised functions and operators on the derived types are compatible with
the polymorphic comparison and all the polymorphic functions and operators
from the {!Stdlib}. *)
module List (P : COMPARABLE) : S with type t = P.t list
module Option (P : COMPARABLE) : S with type t = P.t option
module Result (Ok : COMPARABLE) (Error : COMPARABLE) :
S with type t = (Ok.t, Error.t) result
(** {2 List lengths}
Helpers for more readable {!Stdlib.List.compare_lengths} and
{!Stdlib.List.compare_length_with}.
These modules are intended to be used as [Module.(expression)], most often
within an [if] condition. E.g.,
{[
if Compare.List_length_with.(chunks > max_number_of_chunks) then
raise Maximum_size_exceeeded
else
..
]}
*)
module List_length_with : sig
(** [Compare.List_length_with.(l = n)] iff [l] is of length [n]. In other
words iff [Stdlib.List.compare_length_with l n = 0]. Note that, like
[compare_length_with], this comparison does not explore the list [l]
beyond its [n]-th element. *)
val ( = ) : 'a list -> int -> bool
(** [Compare.List_length_with.(l <> n)] iff [l] is not of length [n]. In other
words iff [Stdlib.List.compare_length_with l n <> 0]. Note that, like
[compare_length_with], this comparison does not explore the list [l]
beyond its [n]-th element. *)
val ( <> ) : 'a list -> int -> bool
(** [Compare.List_length_with.(l < n)] iff [l] is of length strictly less than
[n]. In other words iff [Stdlib.List.compare_length_with l n < 0]. Note
that, like [compare_length_with], this comparison does not explore the
list [l] beyond its [n]-th element. *)
val ( < ) : 'a list -> int -> bool
(** [Compare.List_length_with.(l <= n)] iff [l] is of length less than [n]. In
other words iff [Stdlib.List.compare_length_with l n <= 0]. Note that,
like [compare_length_with], this comparison does not explore the list [l]
beyond its [n]-th element. *)
val ( <= ) : 'a list -> int -> bool
(** [Compare.List_length_with.(l >= n)] iff [l] is of length greater than [n].
In other words iff [Stdlib.List.compare_length_with l n >= 0]. Note that,
like [compare_length_with], this comparison does not explore the list [l]
beyond its [n]-th element. *)
val ( >= ) : 'a list -> int -> bool
(** [Compare.List_length_with.(l > n)] iff [l] is of length strictly greater
than [n]. In other words iff [Stdlib.List.compare_length_with l n > 0].
Note that, like [compare_length_with], this comparison does not explore
the list [l] beyond its [n]-th element. *)
val ( > ) : 'a list -> int -> bool
(** [Compare.List_length_with.compare] is an alias for
[Stdlib.List.compare_length_with]. *)
val compare : 'a list -> int -> int
(** [Compare.List_length_with.equal] is an alias for
[Compare.List_length_with.( = )]. *)
val equal : 'a list -> int -> bool
end
module List_lengths : sig
(** [Compare.List_lengths.(xs = ys)] iff [xs] and [ys] have the same length.
In other words, iff [Stdlib.List.compare_lengths xs ys = 0]. Note that,
like [compare_lengths], this comparison only explores the lists up to the
length of the shortest one. *)
val ( = ) : 'a list -> 'b list -> bool
(** [Compare.List_lengths.(xs <> ys)] iff [xs] and [ys] have different
lengths. In other words, iff [Stdlib.List.compare_lengths xs ys <> 0].
Note that, like [compare_lengths], this comparison only explores the lists
up to the length of the shortest one. *)
val ( <> ) : 'a list -> 'b list -> bool
(** [Compare.List_lengths.(xs < ys)] iff [xs] is strictly shorter than [ys].
In other words, iff [Stdlib.List.compare_lengths xs ys < 0]. Note that,
like [compare_lengths], this comparison only explores the lists up to the
length of the shortest one. *)
val ( < ) : 'a list -> 'b list -> bool
(** [Compare.List_lengths.(xs <= ys)] iff [xs] is shorter than [ys].
In other words, iff [Stdlib.List.compare_lengths xs ys <= 0]. Note that,
like [compare_lengths], this comparison only explores the lists up to the
length of the shortest one. *)
val ( <= ) : 'a list -> 'b list -> bool
(** [Compare.List_lengths.(xs >= ys)] iff [xs] is longer than [ys].
In other words, iff [Stdlib.List.compare_lengths xs ys >= 0]. Note that,
like [compare_lengths], this comparison only explores the lists up to the
length of the shortest one. *)
val ( >= ) : 'a list -> 'b list -> bool
(** [Compare.List_lengths.(xs > ys)] iff [xs] is strictly longer than [ys].
In other words, iff [Stdlib.List.compare_lengths xs ys > 0]. Note that,
like [compare_lengths], this comparison only explores the lists up to the
length of the shortest one. *)
val ( > ) : 'a list -> 'b list -> bool
(** [Compare.List_lengths.compare] is an alias for
[Stdlib.List.compare_lengths]. *)
val compare : 'a list -> 'b list -> int
(** [Compare.List_lengths.equal] is an alias for
[Compare.List_lengths.( = )]. *)
val equal : 'a list -> 'b list -> bool
end
(** {2 Building blocks} *)
(** [or_else c f] is [c] if [c <> 0] or [f ()] otherwise.
The intended use is
{[
let compare (foo_a, bar_a) (foo_b, bar_b) =
or_else (Foo.compare foo_a foo_b) (fun () -> Bar.compare bar_a bar_b)
]}
*)
val or_else : int -> (unit -> int) -> int
end
# 36 "v5.in.ml"
module Time : sig
# 1 "v5/time.mli"
type t
include Compare.S with type t := t
val add : t -> int64 -> t
val diff : t -> t -> int64
val of_seconds : int64 -> t
val to_seconds : t -> int64
val of_notation : string -> t option
val of_notation_exn : string -> t
val to_notation : t -> string
val encoding : t Data_encoding.t
val rfc_encoding : t Data_encoding.t
val pp_hum : Format.formatter -> t -> unit
end
# 38 "v5.in.ml"
module TzEndian : sig
# 1 "v5/tzEndian.mli"
val get_int32 : bytes -> int -> int32
val get_int32_string : string -> int -> int32
val set_int32 : bytes -> int -> int32 -> unit
val set_int8 : bytes -> int -> int -> unit
val get_int8 : bytes -> int -> int
val get_int8_string : string -> int -> int
val set_int16 : bytes -> int -> int -> unit
val get_int16 : bytes -> int -> int
val get_int16_string : string -> int -> int
val set_int64 : bytes -> int -> int64 -> unit
val get_int64 : bytes -> int -> int64
val get_int64_string : string -> int -> int64
val get_uint8 : bytes -> int -> int
val get_uint8_string : string -> int -> int
val set_uint8 : bytes -> int -> int -> unit
val get_uint16 : bytes -> int -> int
val get_uint16_string : string -> int -> int
val set_uint16 : bytes -> int -> int -> unit
end
# 40 "v5.in.ml"
module Bits : sig
# 1 "v5/bits.mli"
(** Assuming [x >= 0], [numbits x] is the number of bits needed to
represent [x]. This is also the unique [k] such that
[2^{k - 1} <= x < 2^k] if [x > 0] and [0] otherwise.
The behaviour is unspecified if [x < 0].*)
val numbits : int -> int
end
# 42 "v5.in.ml"
module Equality_witness : sig
# 1 "v5/equality_witness.mli"
(**
This module provides support for type equalities and runtime type identifiers.
For two types [a] and [b], [(a, b) eq] is a witness that [a = b]. This is
a standard generalized algebraic datatype on top of which type-level
programming techniques can be implemented.
Given a type [a], an inhabitant of [a t] is a dynamic identifier for [a].
Identifiers can be compared for equality. They are also equipped with a
hash function.
WARNING: the hash function changes at every run. Therefore, the result
of the hash function should never be stored.
Notice that dynamic identifiers are not unique: two identifiers for [a]
can have distinct hash and can be physically distinct. Hence, only [eq]
can decide if two type identifiers correspond to the same type.
*)
(** A proof witness that two types are equal. *)
type (_, _) eq = Refl : ('a, 'a) eq
(** A dynamic representation for ['a]. *)
type 'a t
(** [make ()] is a dynamic representation for ['a]. A fresh identifier
is returned each time [make ()] is evaluated. *)
val make : unit -> 'a t
(** [eq ida idb] returns a proof that [a = b] if [ida] and [idb]
identify the same type. *)
val eq : 'a t -> 'b t -> ('a, 'b) eq option
(** [hash id] returns a hash for [id]. *)
val hash : 'a t -> int
end
# 44 "v5.in.ml"
module FallbackArray : sig
# 1 "v5/fallbackArray.mli"
(**
This module implements arrays equipped with accessors that cannot
raise exceptions. Reading out of the bounds of the arrays return a
fallback value fixed at array construction time, writing out of the
bounds of the arrays is ignored.
*)
(** The type for array containing values of type ['a]. *)
type 'a t
(** [make len v] builds an array [a] initialized [len] cells with
[v]. The value [v] is the fallback value for [a]. *)
val make : int -> 'a -> 'a t
(** [of_list ~fallback ~proj l] builds a fallback array [a] of length
[List.length l] where each cell [i] is initialized by [proj (List.nth l i)]
and the fallback value is [fallback]. *)
val of_list : fallback:'b -> proj:('a -> 'b) -> 'a list -> 'b t
(** [fallback a] returns the fallback value for [a]. *)
val fallback : 'a t -> 'a
(** [length a] returns the length of [a]. *)
val length : 'a t -> int
(** [get a idx] returns the contents of the cell of index [idx] in
[a]. If [idx] < 0 or [idx] >= [length a], [get a idx] =
[fallback a]. *)
val get : 'a t -> int -> 'a
(** [set a idx value] updates the cell of index [idx] with [value].
If [idx] < 0 or [idx] >= [length a], [a] is unchanged. *)
val set : 'a t -> int -> 'a -> unit
(** [iter f a] iterates [f] over the cells of [a] from the
cell indexed [0] to the cell indexed [length a - 1]. *)
val iter : ('a -> unit) -> 'a t -> unit
(** [map f a] computes a new array obtained by applying [f] to each
cell contents of [a]. Notice that the fallback value of the new
array is [f (fallback a)]. *)
val map : ('a -> 'b) -> 'a t -> 'b t
(** [fold f a init] traverses [a] from the cell indexed [0] to the
cell indexed [length a - 1] and transforms [accu] into [f accu x]
where [x] is the content of the cell under focus. [accu] is
[init] on the first iteration. *)
val fold : ('b -> 'a -> 'b) -> 'a t -> 'b -> 'b
(** [fold_map f a init fallback] traverses [a] from the cell indexed
[0] to the cell indexed [length a - 1] and transforms [accu] into
[fst (f accu x)] where [x] is the content of the cell under
focus. [accu] is [init] on the first iteration. The function also
returns a fresh array containing [snd (f accu x)] for each [x].
[fallback] is required to initialize a fresh array before it can be
filled. *)
val fold_map : ('b -> 'a -> 'b * 'c) -> 'a t -> 'b -> 'c -> 'b * 'c t
end
# 46 "v5.in.ml"
module Error_monad : sig
# 1 "v5/error_monad.mli"
type error_category = [`Branch | `Temporary | `Permanent | `Outdated]
(** CORE : errors *)
type error = ..
val error_encoding : error Data_encoding.t
val pp : Format.formatter -> error -> unit
(** EXT : error registration/query *)
val register_error_kind :
error_category ->
id:string ->
title:string ->
description:string ->
?pp:(Format.formatter -> 'err -> unit) ->
'err Data_encoding.t ->
(error -> 'err option) ->
('err -> error) ->
unit
val json_of_error : error -> Data_encoding.json
val error_of_json : Data_encoding.json -> error
type error_info = {
category : error_category;
id : string;
title : string;
description : string;
schema : Data_encoding.json_schema;
}
val pp_info : Format.formatter -> error_info -> unit
(** Retrieves information of registered errors *)
val get_registered_errors : unit -> error_info list
(** MONAD : trace, monad, etc. *)
type 'err trace
type 'a tzresult = ('a, error trace) result
val make_trace_encoding : 'error Data_encoding.t -> 'error trace Data_encoding.t
val trace_encoding : error trace Data_encoding.t
val pp_trace : Format.formatter -> error trace -> unit
val result_encoding : 'a Data_encoding.t -> 'a tzresult Data_encoding.t
val ok : 'a -> ('a, 'trace) result
val return : 'a -> ('a, 'trace) result Lwt.t
val return_unit : (unit, 'trace) result Lwt.t
val return_none : ('a option, 'trace) result Lwt.t
val return_some : 'a -> ('a option, 'trace) result Lwt.t
val return_nil : ('a list, 'trace) result Lwt.t
val return_true : (bool, 'trace) result Lwt.t
val return_false : (bool, 'trace) result Lwt.t
val error : 'err -> ('a, 'err trace) result
val trace_of_error : 'err -> 'err trace
val fail : 'err -> ('a, 'err trace) result Lwt.t
val ( >>= ) : 'a Lwt.t -> ('a -> 'b Lwt.t) -> 'b Lwt.t
val ( >|= ) : 'a Lwt.t -> ('a -> 'b) -> 'b Lwt.t
val ( >>? ) :
('a, 'trace) result -> ('a -> ('b, 'trace) result) -> ('b, 'trace) result
val ( >|? ) : ('a, 'trace) result -> ('a -> 'b) -> ('b, 'trace) result
val ( >>=? ) :
('a, 'trace) result Lwt.t ->
('a -> ('b, 'trace) result Lwt.t) ->
('b, 'trace) result Lwt.t
val ( >|=? ) :
('a, 'trace) result Lwt.t -> ('a -> 'b) -> ('b, 'trace) result Lwt.t
val ( >>?= ) :
('a, 'trace) result ->
('a -> ('b, 'trace) result Lwt.t) ->
('b, 'trace) result Lwt.t
val ( >|?= ) :
('a, 'trace) result -> ('a -> 'b Lwt.t) -> ('b, 'trace) result Lwt.t
val record_trace : 'err -> ('a, 'err trace) result -> ('a, 'err trace) result
val trace :
'err -> ('b, 'err trace) result Lwt.t -> ('b, 'err trace) result Lwt.t
val record_trace_eval :
(unit -> 'err) -> ('a, 'err trace) result -> ('a, 'err trace) result
val trace_eval :
(unit -> 'err) ->
('b, 'err trace) result Lwt.t ->
('b, 'err trace) result Lwt.t
val error_unless : bool -> 'err -> (unit, 'err trace) result
val error_when : bool -> 'err -> (unit, 'err trace) result
val fail_unless : bool -> 'err -> (unit, 'err trace) result Lwt.t
val fail_when : bool -> 'err -> (unit, 'err trace) result Lwt.t
val unless :
bool -> (unit -> (unit, 'trace) result Lwt.t) -> (unit, 'trace) result Lwt.t
val when_ :
bool -> (unit -> (unit, 'trace) result Lwt.t) -> (unit, 'trace) result Lwt.t
val dont_wait :
(exn -> unit) ->
('trace -> unit) ->
(unit -> (unit, 'trace) result Lwt.t) ->
unit
(** [catch f] executes [f] within a try-with block and wraps exceptions within
a [tzresult]. [catch f] is equivalent to
[try Ok (f ()) with e -> Error (error_of_exn e)].
If [catch_only] is set, then only exceptions [e] such that [catch_only e] is
[true] are caught.
Whether [catch_only] is set or not, this function never catches
non-deterministic runtime exceptions of OCaml such as {!Stack_overflow} and
{!Out_of_memory} nor system-exceptions such as {!Unix.Unix_error} and
{!Sys_error}. *)
val catch : ?catch_only:(exn -> bool) -> (unit -> 'a) -> 'a tzresult
(** [catch_f f handler] is equivalent to [map_error (catch f) handler].
In other words, it catches exceptions in [f ()] and either returns the
value in an [Ok] or passes the exception to [handler] for the [Error].
[catch_only] has the same use as with [catch]. The same restriction on
catching non-deterministic runtime exceptions applies. *)
val catch_f :
?catch_only:(exn -> bool) -> (unit -> 'a) -> (exn -> error) -> 'a tzresult
(** [catch_s] is like [catch] but when [f] returns a promise. It is equivalent
to
{[
Lwt.try_bind f
(fun v -> Lwt.return (Ok v))
(fun e -> Lwt.return (Error (error_of_exn e)))
]}
If [catch_only] is set, then only exceptions [e] such that [catch_only e] is
[true] are caught.
Whether [catch_only] is set or not, this function never catches
non-deterministic runtime exceptions of OCaml such as {!Stack_overflow} and
{!Out_of_memory} nor system-exceptions such as {!Unix.Unix_error} and
{!Sys_error}. *)
val catch_s :
?catch_only:(exn -> bool) -> (unit -> 'a Lwt.t) -> 'a tzresult Lwt.t
val join_e : (unit, 'err trace) result list -> (unit, 'err trace) result
val all_e : ('a, 'err trace) result list -> ('a list, 'err trace) result
val both_e :
('a, 'err trace) result ->
('b, 'err trace) result ->
('a * 'b, 'err trace) result
(**/**)
type shell_tztrace
type 'a shell_tzresult = ('a, shell_tztrace) result
module Lwt_syntax : sig
val return : 'a -> 'a Lwt.t
val return_none : _ option Lwt.t
val return_nil : _ list Lwt.t
val return_true : bool Lwt.t
val return_false : bool Lwt.t
val return_some : 'a -> 'a option Lwt.t
val return_ok : 'a -> ('a, _) result Lwt.t
val return_error : 'e -> (_, 'e) result Lwt.t
val return_ok_unit : (unit, 'e) result Lwt.t
val return_ok_true : (bool, 'e) result Lwt.t
val return_ok_false : (bool, 'e) result Lwt.t
val return_ok_none : ('a option, 'e) result Lwt.t
val return_ok_nil : ('a list, 'e) result Lwt.t
val ( let* ) : 'a Lwt.t -> ('a -> 'b Lwt.t) -> 'b Lwt.t
val ( and* ) : 'a Lwt.t -> 'b Lwt.t -> ('a * 'b) Lwt.t
val ( let+ ) : 'a Lwt.t -> ('a -> 'b) -> 'b Lwt.t
val ( and+ ) : 'a Lwt.t -> 'b Lwt.t -> ('a * 'b) Lwt.t
val join : unit Lwt.t list -> unit Lwt.t
val all : 'a Lwt.t list -> 'a list Lwt.t
val both : 'a Lwt.t -> 'b Lwt.t -> ('a * 'b) Lwt.t
end
module Result_syntax : sig
val return : 'a -> ('a, 'e) result
val return_unit : (unit, 'e) result
val return_none : ('a option, 'e) result
val return_some : 'a -> ('a option, 'e) result
val return_nil : ('a list, 'e) result
val return_true : (bool, 'e) result
val return_false : (bool, 'e) result
val fail : 'e -> ('a, 'e) result
val ( let* ) : ('a, 'e) result -> ('a -> ('b, 'e) result) -> ('b, 'e) result
val ( let+ ) : ('a, 'e) result -> ('a -> 'b) -> ('b, 'e) result
val join : (unit, 'e) result list -> (unit, 'e list) result
val all : ('a, 'e) result list -> ('a list, 'e list) result
val both : ('a, 'e) result -> ('b, 'e) result -> ('a * 'b, 'e list) result
end
module Lwt_result_syntax : sig
val return : 'a -> ('a, 'e) result Lwt.t
val return_unit : (unit, 'e) result Lwt.t
val return_none : ('a option, 'e) result Lwt.t
val return_some : 'a -> ('a option, 'e) result Lwt.t
val return_nil : ('a list, 'e) result Lwt.t
val return_true : (bool, 'e) result Lwt.t
val return_false : (bool, 'e) result Lwt.t
val fail : 'e -> ('a, 'e) result Lwt.t
val ( let* ) :
('a, 'e) result Lwt.t ->
('a -> ('b, 'e) result Lwt.t) ->
('b, 'e) result Lwt.t
val ( let+ ) : ('a, 'e) result Lwt.t -> ('a -> 'b) -> ('b, 'e) result Lwt.t
val lwt_map_error :
('e -> 'f) -> ('a, 'e) result Lwt.t -> ('a, 'f) result Lwt.t
val ( let*! ) : 'a Lwt.t -> ('a -> 'b Lwt.t) -> 'b Lwt.t
val ( let*? ) :
('a, 'e) result -> ('a -> ('b, 'e) result Lwt.t) -> ('b, 'e) result Lwt.t
val join : (unit, 'e) result Lwt.t list -> (unit, 'e list) result Lwt.t
val all : ('a, 'e) result Lwt.t list -> ('a list, 'e list) result Lwt.t
val both :
('a, 'e) result Lwt.t ->
('b, 'e) result Lwt.t ->
('a * 'b, 'e list) result Lwt.t
end
module Tzresult_syntax : sig
val return : 'a -> ('a, 'error) result
val return_unit : (unit, 'error) result
val return_none : ('a option, 'error) result
val return_some : 'a -> ('a option, 'error) result
val return_nil : ('a list, 'error) result
val return_true : (bool, 'error) result
val return_false : (bool, 'error) result
val fail : 'error -> ('a, 'error trace) result
val ( let* ) : ('a, 'e) result -> ('a -> ('b, 'e) result) -> ('b, 'e) result
val ( and* ) :
('a, 'e trace) result -> ('b, 'e trace) result -> ('a * 'b, 'e trace) result
val ( let+ ) : ('a, 'e) result -> ('a -> 'b) -> ('b, 'e) result
val ( and+ ) :
('a, 'e trace) result -> ('b, 'e trace) result -> ('a * 'b, 'e trace) result
val join : (unit, 'error trace) result list -> (unit, 'error trace) result
val all : ('a, 'error trace) result list -> ('a list, 'error trace) result
val both :
('a, 'error trace) result ->
('b, 'error trace) result ->
('a * 'b, 'error trace) result
end
module Lwt_tzresult_syntax : sig
val return : 'a -> ('a, 'error) result Lwt.t
val return_unit : (unit, 'error) result Lwt.t
val return_none : ('a option, 'error) result Lwt.t
val return_some : 'a -> ('a option, 'error) result Lwt.t
val return_nil : ('a list, 'error) result Lwt.t
val return_true : (bool, 'error) result Lwt.t
val return_false : (bool, 'error) result Lwt.t
val fail : 'error -> ('a, 'error trace) result Lwt.t
val ( let* ) :
('a, 'e) result Lwt.t ->
('a -> ('b, 'e) result Lwt.t) ->
('b, 'e) result Lwt.t
val ( and* ) :
('a, 'e trace) result Lwt.t ->
('b, 'e trace) result Lwt.t ->
('a * 'b, 'e trace) result Lwt.t
val ( let+ ) : ('a, 'e) result Lwt.t -> ('a -> 'b) -> ('b, 'e) result Lwt.t
val ( and+ ) :
('a, 'e trace) result Lwt.t ->
('b, 'e trace) result Lwt.t ->
('a * 'b, 'e trace) result Lwt.t
val ( let*! ) : 'a Lwt.t -> ('a -> 'b Lwt.t) -> 'b Lwt.t
val ( let*? ) :
('a, 'e) result -> ('a -> ('b, 'e) result Lwt.t) -> ('b, 'e) result Lwt.t
val join :
(unit, 'error trace) result Lwt.t list -> (unit, 'error trace) result Lwt.t
val all :
('a, 'error trace) result Lwt.t list -> ('a list, 'error trace) result Lwt.t
val both :
('a, 'error trace) result Lwt.t ->
('b, 'error trace) result Lwt.t ->
('a * 'b, 'error trace) result Lwt.t
end
end
# 48 "v5.in.ml"
open Error_monad
module Seq : sig
# 1 "v5/seq.mli"
type 'a t = unit -> 'a node
and +'a node = Nil | Cons of 'a * 'a t
val empty : 'a t
val return : 'a -> 'a t
val cons : 'a -> 'a t -> 'a t
val append : 'a t -> 'a t -> 'a t
val map : ('a -> 'b) -> 'a t -> 'b t
val filter : ('a -> bool) -> 'a t -> 'a t
val filter_map : ('a -> 'b option) -> 'a t -> 'b t
val flat_map : ('a -> 'b t) -> 'a t -> 'b t
val fold_left : ('a -> 'b -> 'a) -> 'a -> 'b t -> 'a
val iter : ('a -> unit) -> 'a t -> unit
val unfold : ('b -> ('a * 'b) option) -> 'b -> 'a t
(** {3 Lwtreslib-specific extensions} *)
(** [first s] is [None] if [s] is empty, it is [Some x] where [x] is the
first element of [s] otherwise.
Note that [first] forces the first element of the sequence, which can have
side-effects or be computationally expensive. Consider, e.g., the case
where [s = filter (fun …) s']: [first s] can force multiple of the values
from [s']. *)
val first : 'a t -> 'a option
(** Similar to {!fold_left} but wraps the traversal in {!result}. The
traversal is interrupted if one of the step returns an [Error _]. *)
val fold_left_e :
('a -> 'b -> ('a, 'trace) result) -> 'a -> 'b t -> ('a, 'trace) result
(** Similar to {!fold_left} but wraps the traversing in {!Lwt}. Each step of
the traversal is started after the previous one has resolved. The
traversal is interrupted if one of the promise is rejected. *)
val fold_left_s : ('a -> 'b -> 'a Lwt.t) -> 'a -> 'b t -> 'a Lwt.t
(** Similar to {!fold_left} but wraps the traversing in [result Lwt.t].
Each step of the traversal is started after the previous one resolved. The
traversal is interrupted if one of the step is rejected or is fulfilled
with [Error _]. *)
val fold_left_es :
('a -> 'b -> ('a, 'trace) result Lwt.t) ->
'a ->
'b t ->
('a, 'trace) result Lwt.t
(** Similar to {!iter} but wraps the iteration in {!result}. The iteration
is interrupted if one of the step returns an [Error _]. *)
val iter_e : ('a -> (unit, 'trace) result) -> 'a t -> (unit, 'trace) result
(** Similar to {!iter} but wraps the iteration in {!Lwt}. Each step
of the iteration is started after the previous one resolved. The iteration
is interrupted if one of the promise is rejected. *)
val iter_s : ('a -> unit Lwt.t) -> 'a t -> unit Lwt.t
(** Similar to {!iter} but wraps the iteration in [result Lwt.t]. Each step
of the iteration is started after the previous one resolved. The iteration
is interrupted if one of the promise is rejected of fulfilled with an
[Error _]. *)
val iter_es :
('a -> (unit, 'trace) result Lwt.t) -> 'a t -> (unit, 'trace) result Lwt.t
(** Similar to {!iter} but wraps the iteration in [result Lwt.t]. All the
steps of the iteration are started concurrently. The promise [iter_ep]
resolves once all the promises of the traversal resolve. At this point it
either:
- is rejected if at least one of the promises is, otherwise
- is fulfilled with [Error _] if at least one of the promises is,
otherwise
- is fulfilled with [Ok ()] if all the promises are. *)
val iter_ep :
('a -> (unit, 'error Error_monad.trace) result Lwt.t) ->
'a t ->
(unit, 'error Error_monad.trace) result Lwt.t
(** Similar to {!iter} but wraps the iteration in {!Lwt}. All the
steps of the iteration are started concurrently. The promise [iter_p f s]
is resolved only once all the promises of the iteration are. At this point
it is either fulfilled if all promises are, or rejected if at least one of
them is. *)
val iter_p : ('a -> unit Lwt.t) -> 'a t -> unit Lwt.t
end
# 52 "v5.in.ml"
module List : sig
# 1 "v5/list.mli"
(** {1 List}
A replacement for {!Stdlib.List} which:
- replaces the exception-raising functions by exception-safe variants,
- provides Lwt-, result- and Lwt-result-aware traversors.
[List] is intended to shadow both {!Stdlib.List} and {!Lwt_list}. *)
(** {2 Basics}
Checkout {!Lwtreslib} for an introduction to the naming and semantic
convention of Lwtreslib. In a nutshell:
- Stdlib functions that raise exceptions are replaced by safe variants
(typically returning [option]).
- The [_e] suffix is for result-aware traversors ("e" stands for "error"),
[_s] and [_p] are for Lwt-aware, and [_es] and [_ep] are for
Lwt-result-aware.
- [_e], [_s], and [_es] traversors are {i fail-early}: they stop traversal
as soon as a failure ([Error] or [Fail]) occurs; [_p] and [_ep]
traversors are {i best-effort}: they only resolve once all of the
intermediate promises have, even if a failure occurs. *)
(** {2 Double-traversal and combine}
Note that double-list traversors ([iter2], [map2], etc., and also [combine])
take an additional [when_different_lengths] parameter. This is to control
the error that is returned when the two lists passed as arguments have
different lengths.
This mechanism is a replacement for {!Stdlib.List.iter2} (etc.) raising
[Invalid_argument].
Note that, as per the fail-early behaviour mentioned above, [_e], [_s], and
[_es] traversors will have already processed the common-prefix before the
error is returned.
Because the best-effort behaviour of [_p] and [_ep] is unsatisfying for this
failure case, double parallel traversors are omitted from this library.
(Specifically, it is not obvious whether nor how the
[when_different_lengths] error should be composed with the other errors.)
To obtain a different behaviour for sequential traversors, or to process
two lists in parallel, you can use {!combine} or any of the alternatives
that handles the error differently: {!combine_drop},
{!combine_with_leftovers}. Finally, the {!rev_combine} is provided to allow
to avoid multiple-reversing.
{3 Special considerations}
Because they traverse the list from right-to-left, the {!fold_right2}
function and all its variants fail with [when_different_lengths] before any
of the processing starts. Whilst this is still within the fail-early
behaviour, it may be surprising enough that it requires mentioning here.
Because they may return early, {!for_all2} and {!exists2} and all their
variants may return [Ok _] even though the arguments have different lengths.
*)
(** {2 API} *)
(** {3 The list type} *)
type 'a t = 'a list = [] | ( :: ) of 'a * 'a list
(** {3 Constructors and some such} *)
(** [nil] is [[]] *)
val nil : 'a list
(** [nil_e] is [Ok []] *)
val nil_e : ('a list, 'trace) result
(** [nil_s] is [Lwt.return_nil] *)
val nil_s : 'a list Lwt.t
(** [nil_es] is [Lwt.return (Ok [])] *)
val nil_es : ('a list, 'trace) result Lwt.t
(** [cons x xs] is [x :: xs] *)
val cons : 'a -> 'a list -> 'a list
(** {3 Safe wrappers}
This part of the module simply shadows some functions from {!Stdlib.List}
with exceptionless variants. As per the design principles of Lwtreslib,
- functions which may fail with [Not_found] or otherwise from
unavailability of data return an [option] instead,
- function which may fail with [Invalid_argument _] or otherwise from
malformedness of input receive an additional parameter to return as an
[Error] instead,
- functions which perform polymorphic comparison receive an additional
parameter for monomorphic comparison instead. *)
(** [hd xs] is the head (first element) of the list or [None] if the list is
empty. *)
val hd : 'a list -> 'a option
(** [tl xs] is the tail of the list (the whole list except the first element)
or [None] if the list is empty. *)
val tl : 'a list -> 'a list option
(** [nth xs n] is the [n]th element of the list or [None] if the list has
fewer than [n] elements.
For example, [nth xs 0 = hd xs] and [nth ['x'; 'y'] 1 = Some 'y']. *)
val nth : 'a list -> int -> 'a option
(** [nth_opt] is an alias for [nth] provided for compatibility with
{!Stdlib.List}. *)
val nth_opt : 'a list -> int -> 'a option
(** [last x xs] is the last element of the list [xs] or [x] if [xs] is empty.
The primary intended use for [last] is after destructing a list:
[match l with | [] -> … | x :: xs -> last x xs]
but it can also be used for a default value:
[last default_value_if_empty xs]. *)
val last : 'a -> 'a list -> 'a
(** [last_opt xs] is the last element of the list [xs] or [None] if the list
[xs] is empty. *)
val last_opt : 'a list -> 'a option
(** [find predicate xs] is the first element [x] of the list [xs] such that
[predicate x] is [true] or [None] if the list [xs] has no such element. *)
val find : ('a -> bool) -> 'a list -> 'a option
(** [find_opt] is an alias for [find] provided for compatibility with
{!Stdlib.List}. *)
val find_opt : ('a -> bool) -> 'a list -> 'a option
(** [find_map f xs] applies [f] to each of the elements of [xs] until it
returns [Some _] at which point it is returned. If no such elements are
found then it returns [None].
Note that it only applies [f] to a prefix of [xs]. It doesn't apply [f] to
the elements of [xs] which are after the found element. Consequently,
[find_map f xs] has better performance and a different semantic than
calling [map] and [find] separately. *)
val find_map : ('a -> 'b option) -> 'a list -> 'b option
(** [mem ~equal a l] is [true] iff there is an element [e] of [l] such that
[equal a e]. *)
val mem : equal:('a -> 'a -> bool) -> 'a -> 'a list -> bool
(** [assoc ~equal k kvs] is [Some v] such that [(k', v)] is the first pair in
the list such that [equal k' k] or [None] if the list contains no such
pair. *)
val assoc : equal:('a -> 'a -> bool) -> 'a -> ('a * 'b) list -> 'b option
(** [assoc_opt] is an alias for [assoc] provided for compatibility with
{!Stdlib.List}. *)
val assoc_opt : equal:('a -> 'a -> bool) -> 'a -> ('a * 'b) list -> 'b option
(** [assq k kvs] is the same as [assoc ~equal:Stdlib.( == ) k kvs]: it uses
the physical equality. *)
val assq : 'a -> ('a * 'b) list -> 'b option
(** [assq_opt] is an alias for [assq] provided for compatibility with
{!Stdlib.List}. *)
val assq_opt : 'a -> ('a * 'b) list -> 'b option
(** [mem_assoc ~equal k l] is equivalent to
[Option.is_some @@ assoc ~equal k l]. *)
val mem_assoc : equal:('a -> 'a -> bool) -> 'a -> ('a * 'b) list -> bool
(** [mem_assq k l] is [mem_assoc ~equal:Stdlib.( == ) k l]. *)
val mem_assq : 'a -> ('a * 'b) list -> bool
(** [remove_assoc ~equal k l] is [l] without the first element [(k', _)] such
that [equal k k']. *)
val remove_assoc :
equal:('a -> 'a -> bool) -> 'a -> ('a * 'b) list -> ('a * 'b) list
(** [remove_assoq k l] is [remove_assoc ~equal:Stdlib.( == ) k l]. *)
val remove_assq : 'a -> ('a * 'b) list -> ('a * 'b) list
(** {3 Initialisation} *)
(** [init ~when_negative_length n f] is a list of [n] elements [f 0], [f 1],
etc.
If [n] is negative, it is [Error when_negative_length] instead. *)
val init :
when_negative_length:'trace ->
int ->
(int -> 'a) ->
('a list, 'trace) result
(** {3 Basic traversal} *)
(** [length xs] is the number of elements in [xs].
[length []] is [0], [length ['x']] is [1], etc. *)
val length : 'a list -> int
(** [rev xs] is a list with the elements appearing in the reverse order as in
[xs].
[rev ['x'; 'y']] is ['y'; 'x'] *)
val rev : 'a list -> 'a list
(** [concat xs] is a list containing the elements of the elements of [xs].
[concat [['x'; 'y']; ['a'; 'b']]] is [['x'; 'y'; 'a'; 'b']] *)
val concat : 'a list list -> 'a list
(** [append xs ys] is a list containing the elements of [xs] and the elements
of [ys], in this order.
[concat ['x'; 'y'] ['a'; 'b']] is [['x'; 'y'; 'a'; 'b']] *)
val append : 'a list -> 'a list -> 'a list
(** [rev_append xs ys] is [append (rev xs) ys] but more efficient. In other
words, [rev_append xs ys] is a list containing the elements of xs in
reverse order followed by the elements of [ys].
There are two main use-cases for [rev_append]. First, you should use
[rev_append] when the order of elements is unimportant. In this case you
simply replace [append xs ys] with [rev_append xs ys].
Second, you can use [rev_append] on an already reversed list. You may
obtain an already reversed list from any of the other [rev_*] functions of
this module, or simply via your own traversal. In this case, you replace,
say, [append (map f xs) ys] with [rev_append (rev_map f xs) ys]. *)
val rev_append : 'a list -> 'a list -> 'a list
(** [flatten] is an alias for {!concat}. *)
val flatten : 'a list list -> 'a list
(** {3 Double-list traversals}
These safe-wrappers take an explicit value to handle the case of lists of
unequal length. This value is passed as a named parameter:
[when_different_lengths].
Note that the traversal function passed as argument (if any) is applied to
the common prefix of the two lists, even if they are of different lengths.
E.g., in [map2 f ['x', 'y'] ['a']] the call [f 'x' 'a'] is made and all
its side-effects are performed before the value
[Error when_different_lengths] is returned
*)
(** [combine ~when_different_lengths l1 l2] is either
- [Error when_different_lengths] if [List.length l1 <> List.length l2]
- a list of pairs of elements from [l1] and [l2]
E.g., [combine ~when_different_lengths [] []] is [Ok []]
E.g., [combine ~when_different_lengths [1; 2] ['a'; 'b']] is [Ok [(1,'a'); (2, 'b')]]
E.g., [combine ~when_different_lengths:"wrong" [1] []] is [Error "wrong"]
Note: [combine ~when_different_lengths l1 l2] is equivalent to
[try Ok (Stdlib.List.combine l1 l2) with Invalid_argument _ -> when_different_lengths]
The same equivalence almost holds for the other double traversors below.
The notable difference is if the functions passed as argument to the
traversors raise the [Invalid_argument _] exception. *)
val combine :
when_different_lengths:'trace ->
'a list ->
'b list ->
(('a * 'b) list, 'trace) result
(** [rev_combine ~when_different_lengths xs ys] is
[rev (combine ~when_different_lengths xs ys)] but more efficient. *)
val rev_combine :
when_different_lengths:'trace ->
'a list ->
'b list ->
(('a * 'b) list, 'trace) result
(** [split xs] is [(List.map fst xs, List.map snd xs)] but more efficient. *)
val split : ('a * 'b) list -> 'a list * 'b list
(** [iter2 ~when_different_lengths f xs ys] is [f x0 y0; f x1 y1; …].
Remember that, even if the lists are of different lengths, the function
[f] is applied to the common prefix of [xs] and [ys]. This is true for
other traversals, but especially relevant to [iter] which is commonly used
for side-effects. *)
val iter2 :
when_different_lengths:'trace ->
('a -> 'b -> unit) ->
'a list ->
'b list ->
(unit, 'trace) result
(** [map2 ~when_different_lengths f xs ys] is a list with elements [f x0 y0],
[f x1 y1], etc.
Remember that, even if the lists are of different lengths, the function
[f] is applied to the common prefix of [xs] and [ys]. Beware of
side-effects and computational cost. *)
val map2 :
when_different_lengths:'trace ->
('a -> 'b -> 'c) ->
'a list ->
'b list ->
('c list, 'trace) result
(** [rev_map2 ~when_different_lengths f xs ys] is
[Result.map rev @@ map2 ~when_different_lengths f xs ys] but more
efficient.
Remember that, even if the lists are of different lengths, the function
[f] is applied to the common prefix of [xs] and [ys]. Beware of
side-effects and computational cost. *)
val rev_map2 :
when_different_lengths:'trace ->
('a -> 'b -> 'c) ->
'a list ->
'b list ->
('c list, 'trace) result
(** [fold_left2 ~when_different_lengths f init xs ys] is
[… (f (f init x0 y0) x1 y1)].
Remember that, even if the lists are of different lengths, the function
[f] is applied to the common prefix of [xs] and [ys]. Beware of
side-effects and computational cost. *)
val fold_left2 :
when_different_lengths:'trace ->
('a -> 'b -> 'c -> 'a) ->
'a ->
'b list ->
'c list ->
('a, 'trace) result
(** [fold_right2 ~when_different_lengths f xs ys init] is
[f x0 y0 (f x1 y1 (…))].
This function is not tail-recursive.
Note that unlike the left-to-right double-list traversors, [fold_right2]
only calls [f] if the lists are of the same length. *)
val fold_right2 :
when_different_lengths:'trace ->
('a -> 'b -> 'c -> 'c) ->
'a list ->
'b list ->
'c ->
('c, 'trace) result
(** [for_all2 ~when_different_lengths f xs ys] is
[f x0 y0 && f x1 y1 && …].
The function stops early if it encounters elements [xn], [yn] such that [f
xn yn] is [false]. (This is consistent with the short-circuit, lazy
evaluation strategy of [&&] in the descritpion above.)
Also note that, if such an element is found in the common prefix of [xs]
and [ys], then the function returns [Ok false] even if [xs] and [ys] are
of different lengths.
Examples:
[for_all2 ~when_different_lengths (=) [] []] is [Ok true]
[for_all2 ~when_different_lengths (=) ['x'] ['a']] is [Ok false]
[for_all2 ~when_different_lengths (=) ['x'; 'y'] ['a']] is [Ok false]
[for_all2 ~when_different_lengths (=) ['x'] ['x']] is [Ok true]
[for_all2 ~when_different_lengths (=) ['x'; 'y'] ['x']] is [Error when_different_lengths]
[for_all2 ~when_different_lengths (=) ['x'; 'y'] ['x'; 'b']] is [Ok false]
[for_all2 ~when_different_lengths (=) ['x'; 'y'] ['x'; 'y'; 'c']] is
[Error when_different_lengths]
Remember that, when it returns [Error when_different_lengths], the
function [f] has already been applied to the common prefix of [xs] and
[ys]. Beware of side-effects and computational cost. *)
val for_all2 :
when_different_lengths:'trace ->
('a -> 'b -> bool) ->
'a list ->
'b list ->
(bool, 'trace) result
(** [exists2 ~when_different_lengths f xs ys] is
[f x0 y0 || f x1 y1 || …].
The function stops early if it encounters elements [xn], [yn] such that [f
xn yn] is [true]. (This is consistent with the short-circuit, lazy
evaluation strategy of [||] in the descritpion above.)
Also note that, if such an element is found in the common prefix of [xs]
and [ys], then the function returns [Ok true] even if [xs] and [ys] are of
different lengths.
Examples:
[exists2 ~when_different_lengths (=) [] []] is [Ok false]
[exists2 ~when_different_lengths (=) ['x'] ['a']] is [Ok false]
[exists2 ~when_different_lengths (=) ['x'; 'y'] ['a']] is [Error when_different_lengths]
[exists2 ~when_different_lengths (=) ['x'] ['x']] is [Ok true]
[exists2 ~when_different_lengths (=) ['x'; 'y'] ['x']] is [Ok true]
Remember that, when it returns [Error when_different_lengths], the
function [f] has already been applied to the common prefix of [xs] and
[ys]. Beware of side-effects and computational cost. *)
val exists2 :
when_different_lengths:'trace ->
('a -> 'b -> bool) ->
'a list ->
'b list ->
(bool, 'trace) result
(** {3 Monad-aware variants}
The functions below are strict extensions of the standard {!Stdlib.List}
module. It is for result-, lwt- and lwt-result-aware variants. The meaning
of the suffix is as described above, in {!Lwtreslib}, and in {!Sigs.Seq}. *)
(** {3 Initialisation variants}
Note that for asynchronous variants ([_s], [_es], [_p], and [_ep]), if the
length parameter is negative, then the promise is returned already
fulfilled with [Error when_different_lengths]. *)
(** [init_e] is a Result-aware variant of {!init}. *)
val init_e :
when_negative_length:'trace ->
int ->
(int -> ('a, 'trace) result) ->
('a list, 'trace) result
(** [init_s] is an Lwt-aware variant of {!init}. *)
val init_s :
when_negative_length:'trace ->
int ->
(int -> 'a Lwt.t) ->
('a list, 'trace) result Lwt.t
(** [init_es] is an Lwt-Result-aware variant of {!init}. *)
val init_es :
when_negative_length:'trace ->
int ->
(int -> ('a, 'trace) result Lwt.t) ->
('a list, 'trace) result Lwt.t
(** [init_p] is a variant of {!init_s} where the promises are evaluated
concurrently. *)
val init_p :
when_negative_length:'trace ->
int ->
(int -> 'a Lwt.t) ->
('a list, 'trace) result Lwt.t
(** {3 Query variants} *)
(** [find_e] is a Result-aware variant of {!find}. *)
val find_e :
('a -> (bool, 'trace) result) -> 'a list -> ('a option, 'trace) result
(** [find_s] is an Lwt-aware variant of {!find}. *)
val find_s : ('a -> bool Lwt.t) -> 'a list -> 'a option Lwt.t
(** [find_es] is an Lwt-Result-aware variant of {!find}. *)
val find_es :
('a -> (bool, 'trace) result Lwt.t) ->
'a list ->
('a option, 'trace) result Lwt.t
(** [find_map_e] is a Result-aware variant of {!find_map}. *)
val find_map_e :
('a -> ('b option, 'trace) result) -> 'a list -> ('b option, 'trace) result
(** [find_map_s] is an Lwt-aware variant of {!find_map}. *)
val find_map_s : ('a -> 'b option Lwt.t) -> 'a list -> 'b option Lwt.t
(** [find_map_es] is an Lwt-Result-aware variant of {!find_map}. *)
val find_map_es :
('a -> ('b option, 'trace) result Lwt.t) ->
'a list ->
('b option, 'trace) result Lwt.t
(** [filter f xs] is the list of all the elements [xn] of [xs] such that
[f xn] is [true].
[filter (fun x -> x > 10) [0; 2; 19; 22; -1; 3; 11]] is [[19; 22; 11]] *)
val filter : ('a -> bool) -> 'a list -> 'a list
(** [filteri] is similar to {!filter} but the predicate also receives the
element's index as an argument. *)
val filteri : (int -> 'a -> bool) -> 'a list -> 'a list
(** [find_all] is an alias for {!filter}. *)
val find_all : ('a -> bool) -> 'a list -> 'a list
(** [rev_filter f l] is [rev (filter f l)] but more efficient. *)
val rev_filter : ('a -> bool) -> 'a list -> 'a list
(** [rev_filteri f l] is [rev (filteri f l)] but more efficient. *)
val rev_filteri : (int -> 'a -> bool) -> 'a list -> 'a list
(** [rev_filter_some xs] is [rev @@ filter_some xs] but more efficient. *)
val rev_filter_some : 'a option list -> 'a list
(** [filter_some] extracts all the payloads of the [Some] variants.
The order is preserved.
[filter_some [None; Some 'a'; None; None; Some 'z'; Some 'u']] is
[['a'; 'z'; 'u']]. *)
val filter_some : 'a option list -> 'a list
(** [rev_filter_ok rs] is [rev @@ filter_ok rs] but more efficient. *)
val rev_filter_ok : ('a, 'b) result list -> 'a list
(** [filter_ok] extracts all the payloads of the [Ok] variants.
The order is preserved.
[filter_ok [Error 3; Ok 'a'; Error 3; Error 5; Ok 'z'; Ok 'u']] is
[['a'; 'z'; 'u']]. *)
val filter_ok : ('a, 'b) result list -> 'a list
(** [rev_filter_error rs] is [rev @@ filter_error rs] but more efficient. *)
val rev_filter_error : ('a, 'b) result list -> 'b list
(** [filter_error] extracts all the payloads of the [Error] variants.
The order is preserved.
[filter_ok [Error 3; Ok 'a'; Error 3; Error 5; Ok 'z'; Ok 'u']] is
[[3; 3; 5]]. *)
val filter_error : ('a, 'b) result list -> 'b list
(** [rev_filter_left es] is [rev @@ filter_left es] but more efficient. *)
val rev_filter_left : ('a, 'b) Either.t list -> 'a list
(** [filter_left] extracts all the payloads of the [Left] variants.
The order is preserved.
[filter_left [Right 3; Left 'a'; Right 3; Right 5; Left 'z'; Left 'u']] is
[['a'; 'z'; 'u']]. *)
val filter_left : ('a, 'b) Either.t list -> 'a list
(** [rev_filter_right es] is [rev @@ filter_right es] but more efficient. *)
val rev_filter_right : ('a, 'b) Either.t list -> 'b list
(** [filter_right] extracts all the payloads of the [Right] variants.
The order is preserved.
[filter_right [Right 3; Left 'a'; Right 3; Right 5; Left 'z'; Left 'u']] is
[[3; 3; 5]]. *)
val filter_right : ('a, 'b) Either.t list -> 'b list
(** [rev_filter_e] is a Result-aware variant of {!rev_filter}. *)
val rev_filter_e :
('a -> (bool, 'trace) result) -> 'a list -> ('a list, 'trace) result
(** [filter_e] is a Result-aware variant of {!filter}. *)
val filter_e :
('a -> (bool, 'trace) result) -> 'a list -> ('a list, 'trace) result
(** [rev_filter_s] is an Lwt-aware variant of {!rev_filter}. *)
val rev_filter_s : ('a -> bool Lwt.t) -> 'a list -> 'a list Lwt.t
(** [filter_s] is an Lwt-aware variant of {!filter}. *)
val filter_s : ('a -> bool Lwt.t) -> 'a list -> 'a list Lwt.t
(** [rev_filter_es] is an Lwt-Result-aware variant of {!rev_filter}. *)
val rev_filter_es :
('a -> (bool, 'trace) result Lwt.t) ->
'a list ->
('a list, 'trace) result Lwt.t
(** [filter_es] is an Lwt-Result-aware variant of {!filter}. *)
val filter_es :
('a -> (bool, 'trace) result Lwt.t) ->
'a list ->
('a list, 'trace) result Lwt.t
(** [rev_filteri_e] is a Result-aware variant of {!rev_filteri}. *)
val rev_filteri_e :
(int -> 'a -> (bool, 'trace) result) -> 'a list -> ('a list, 'trace) result
(** [filteri_e] is a Result-aware variant of {!filteri}. *)
val filteri_e :
(int -> 'a -> (bool, 'trace) result) -> 'a list -> ('a list, 'trace) result
(** [rev_filteri_s] is an Lwt-aware variant of {!rev_filteri}. *)
val rev_filteri_s : (int -> 'a -> bool Lwt.t) -> 'a list -> 'a list Lwt.t
(** [filteri_s] is an Lwt-aware variant of {!filteri}. *)
val filteri_s : (int -> 'a -> bool Lwt.t) -> 'a list -> 'a list Lwt.t
(** [rev_filteri_es] is an Lwt-Result-aware variant of {!rev_filteri}. *)
val rev_filteri_es :
(int -> 'a -> (bool, 'trace) result Lwt.t) ->
'a list ->
('a list, 'trace) result Lwt.t
(** [filteri_es] is an Lwt-Result-aware variant of {!filteri}. *)
val filteri_es :
(int -> 'a -> (bool, 'trace) result Lwt.t) ->
'a list ->
('a list, 'trace) result Lwt.t
(** [rev_partition f xs] is [let rt, rf = partition f xs in (rev rt, rev rf)]
but more efficient. *)
val rev_partition : ('a -> bool) -> 'a list -> 'a list * 'a list
(** [partition f xs] is a couple of lists [(ts, fs)] where [ts] contains all
the elements of [xs] such that [f x] is [true] and [fs] contains all the
elements of [xs] such that [f x] is [false].
The function [f] is applied once to each element of [xs]. *)
val partition : ('a -> bool) -> 'a list -> 'a list * 'a list
(** [rev_partition_map f xs] is
[let rt, rf = partition_map f xs in (rev rt, rev rf)]
but more efficient. *)
val rev_partition_map :
('a -> ('b, 'c) Either.t) -> 'a list -> 'b list * 'c list
(** [partition_map f xs] applies [f] to each of the element of [xs] and
returns a couple of lists [(ls, rs)] where [ls] contains all
the [l] such that [f x] is [Left l] and [rs] contains all
the [r] such that [f x] is [Right r]. *)
val partition_map : ('a -> ('b, 'c) Either.t) -> 'a list -> 'b list * 'c list
(** [rev_partition_result rs] is [partition_result @@ rev rs] but more
efficient. *)
val rev_partition_result : ('a, 'b) result list -> 'a list * 'b list
(** [partition_result rs] is a tuple of lists [(os, es)] where [os] contains
all the payloads of [Ok] variants of [rs] and [es] contains all the
payloads of [Error] variants of [rs].
[partition_result rs] is [(filter_ok rs, filter_error rs)] but more
efficient. *)
val partition_result : ('a, 'b) result list -> 'a list * 'b list
(** [rev_partition_either rs] is [partition_either @@ rev rs] but more
efficient. *)
val rev_partition_either : ('a, 'b) Either.t list -> 'a list * 'b list
(** [partition_either es] is a tuple of lists [(ls, rs)] where [ls] contains
all the payloads of [Left] variants of [ls] and [rs] contains all the
payloads of [Right] variants of [es].
[partition_either es] is [(filter_left es, filter_right es)] but more
efficient. *)
val partition_either : ('a, 'b) Either.t list -> 'a list * 'b list
(** [rev_partition_e] is a Result-aware variant of {!rev_partition}. *)
val rev_partition_e :
('a -> (bool, 'trace) result) ->
'a list ->
('a list * 'a list, 'trace) result
(** [partition_e] is a Result-aware variant of {!partition}. *)
val partition_e :
('a -> (bool, 'trace) result) ->
'a list ->
('a list * 'a list, 'trace) result
(** [rev_partition_s] is an Lwt-aware variant of {!rev_partition}. *)
val rev_partition_s :
('a -> bool Lwt.t) -> 'a list -> ('a list * 'a list) Lwt.t
(** [partition_s] is an Lwt-aware variant of {!partition}. *)
val partition_s : ('a -> bool Lwt.t) -> 'a list -> ('a list * 'a list) Lwt.t
(** [rev_partition_es] is an Lwt-Result-aware variant of {!rev_partition}. *)
val rev_partition_es :
('a -> (bool, 'trace) result Lwt.t) ->
'a list ->
('a list * 'a list, 'trace) result Lwt.t
(** [partition_es] is an Lwt-Result-aware variant of {!partition}. *)
val partition_es :
('a -> (bool, 'trace) result Lwt.t) ->
'a list ->
('a list * 'a list, 'trace) result Lwt.t
(** [partition_p] is a variant of {!partition_s} where the promises are
evaluated concurrently. *)
val partition_p : ('a -> bool Lwt.t) -> 'a list -> ('a list * 'a list) Lwt.t
(** [rev_partition_map_e] is a Result-aware variant of {!rev_partition_map}. *)
val rev_partition_map_e :
('a -> (('b, 'c) Either.t, 'trace) result) ->
'a list ->
('b list * 'c list, 'trace) result
(** [partition_map_e] is a Result-aware variant of {!partition_map}. *)
val partition_map_e :
('a -> (('b, 'c) Either.t, 'trace) result) ->
'a list ->
('b list * 'c list, 'trace) result
(** [rev_partition_map_s] is an Lwt-aware variant of {!rev_partition_map}. *)
val rev_partition_map_s :
('a -> ('b, 'c) Either.t Lwt.t) -> 'a list -> ('b list * 'c list) Lwt.t
(** [partition_map_s] is an Lwt-aware variant of {!partition_map}. *)
val partition_map_s :
('a -> ('b, 'c) Either.t Lwt.t) -> 'a list -> ('b list * 'c list) Lwt.t
(** [rev_partition_map_es] is an Lwt-Result-aware variant of
{!rev_partition_map}. *)
val rev_partition_map_es :
('a -> (('b, 'c) Either.t, 'trace) result Lwt.t) ->
'a list ->
('b list * 'c list, 'trace) result Lwt.t
(** [partition_map_es] is an Lwt-Result-aware variant of {!partition_map}. *)
val partition_map_es :
('a -> (('b, 'c) Either.t, 'trace) result Lwt.t) ->
'a list ->
('b list * 'c list, 'trace) result Lwt.t
(** {3 Traversal variants} *)
(** [iter f xs] is [f x0; f x1; …]. *)
val iter : ('a -> unit) -> 'a list -> unit
(** [iter_e] is a Result-aware variant of {!iter}. *)
val iter_e : ('a -> (unit, 'trace) result) -> 'a list -> (unit, 'trace) result
(** [iter_s] is an Lwt-aware variant of {!iter}. *)
val iter_s : ('a -> unit Lwt.t) -> 'a list -> unit Lwt.t
(** [iter_es] is an Lwt-Result-aware variant of {!iter}. *)
val iter_es :
('a -> (unit, 'trace) result Lwt.t) ->
'a list ->
(unit, 'trace) result Lwt.t
(** [iter_p] is a variant of {!iter_s} where the promises are evaluated
concurrently. *)
val iter_p : ('a -> unit Lwt.t) -> 'a list -> unit Lwt.t
(** [iteri f xs] is [f 0 x0; f 1 x1; …]. *)
val iteri : (int -> 'a -> unit) -> 'a list -> unit
(** [iteri_e] is a Result-aware variant of {!iteri}. *)
val iteri_e :
(int -> 'a -> (unit, 'trace) result) -> 'a list -> (unit, 'trace) result
(** [iteri_s] is an Lwt-aware variant of {!iteri}. *)
val iteri_s : (int -> 'a -> unit Lwt.t) -> 'a list -> unit Lwt.t
(** [iteri_es] is an Lwt-Result-aware variant of {!iteri}. *)
val iteri_es :
(int -> 'a -> (unit, 'trace) result Lwt.t) ->
'a list ->
(unit, 'trace) result Lwt.t
(** [iteri_p] is a variant of {!iteri_s} where the promises are evaluated
concurrently. *)
val iteri_p : (int -> 'a -> unit Lwt.t) -> 'a list -> unit Lwt.t
(** [map f xs] is the list [[f x0; f x1; …]]. *)
val map : ('a -> 'b) -> 'a list -> 'b list
(** [map_e] is a Result-aware variant of {!map}. *)
val map_e : ('a -> ('b, 'trace) result) -> 'a list -> ('b list, 'trace) result
(** [map_s] is an Lwt-aware variant of {!map}. *)
val map_s : ('a -> 'b Lwt.t) -> 'a list -> 'b list Lwt.t
(** [map_es] is an Lwt-Result-aware variant of {!map}. *)
val map_es :
('a -> ('b, 'trace) result Lwt.t) ->
'a list ->
('b list, 'trace) result Lwt.t
(** [map_p] is a variant of {!map_s} where the promises are evaluated
concurrently. *)
val map_p : ('a -> 'b Lwt.t) -> 'a list -> 'b list Lwt.t
(** [mapi f xs] is the list [[f 0 x0; f 1 x1; …]]. *)
val mapi : (int -> 'a -> 'b) -> 'a list -> 'b list
(** [mapi_e] is a Result-aware variant of {!mapi}. *)
val mapi_e :
(int -> 'a -> ('b, 'trace) result) -> 'a list -> ('b list, 'trace) result
(** [mapi_s] is an Lwt-aware variant of {!mapi}. *)
val mapi_s : (int -> 'a -> 'b Lwt.t) -> 'a list -> 'b list Lwt.t
(** [mapi_es] is an Lwt-Result-aware variant of {!mapi}. *)
val mapi_es :
(int -> 'a -> ('b, 'trace) result Lwt.t) ->
'a list ->
('b list, 'trace) result Lwt.t
(** [mapi_p] is a variant of {!mapi_s} where the promises are evaluated
concurrently. *)
val mapi_p : (int -> 'a -> 'b Lwt.t) -> 'a list -> 'b list Lwt.t
(** [rev_map f xs] is [rev @@ map f xs] but more efficient. *)
val rev_map : ('a -> 'b) -> 'a list -> 'b list
(** [rev_mapi f xs] is [rev @@ mapi f xs] but more efficient. *)
val rev_mapi : (int -> 'a -> 'b) -> 'a list -> 'b list
(** [rev_map_e] is a Result-aware variant of {!rev_map}. *)
val rev_map_e :
('a -> ('b, 'trace) result) -> 'a list -> ('b list, 'trace) result
(** [rev_map_s] is an Lwt-aware variant of {!rev_map}. *)
val rev_map_s : ('a -> 'b Lwt.t) -> 'a list -> 'b list Lwt.t
(** [rev_map_es] is an Lwt-Result-aware variant of {!rev_map}. *)
val rev_map_es :
('a -> ('b, 'trace) result Lwt.t) ->
'a list ->
('b list, 'trace) result Lwt.t
(** [rev_map_p] is a variant of {!rev_map_s} where the promises are evaluated
concurrently. *)
val rev_map_p : ('a -> 'b Lwt.t) -> 'a list -> 'b list Lwt.t
(** [rev_mapi_e] is a Result-aware variant of {!rev_mapi}. *)
val rev_mapi_e :
(int -> 'a -> ('b, 'trace) result) -> 'a list -> ('b list, 'trace) result
(** [rev_mapi_s] is an Lwt-aware variant of {!rev_mapi}. *)
val rev_mapi_s : (int -> 'a -> 'b Lwt.t) -> 'a list -> 'b list Lwt.t
(** [rev_mapi_es] is an Lwt-Result-aware variant of {!rev_mapi}. *)
val rev_mapi_es :
(int -> 'a -> ('b, 'trace) result Lwt.t) ->
'a list ->
('b list, 'trace) result Lwt.t
(** [rev_mapi_p] is a variant of {!rev_mapi_s} where the promises are
evaluated concurrently. *)
val rev_mapi_p : (int -> 'a -> 'b Lwt.t) -> 'a list -> 'b list Lwt.t
(** [rev_filter_map f xs] is [rev @@ filter_map f xs] but more efficient. *)
val rev_filter_map : ('a -> 'b option) -> 'a list -> 'b list
(** [rev_filter_map_e] is a Result-aware variant of {!rev_filter_map}. *)
val rev_filter_map_e :
('a -> ('b option, 'trace) result) -> 'a list -> ('b list, 'trace) result
(** [filter_map_e] is a Result-aware variant of {!filter_map}. *)
val filter_map_e :
('a -> ('b option, 'trace) result) -> 'a list -> ('b list, 'trace) result
(** [rev_filter_map_s] is an Lwt-aware variant of {!rev_filter_map}. *)
val rev_filter_map_s : ('a -> 'b option Lwt.t) -> 'a list -> 'b list Lwt.t
(** [filter_map f xs] is [filter_some @@ map f xs] but more efficient. *)
val filter_map : ('a -> 'b option) -> 'a list -> 'b list
(** [filter_map_s] is an Lwt-aware variant of {!filter_map}. *)
val filter_map_s : ('a -> 'b option Lwt.t) -> 'a list -> 'b list Lwt.t
(** [rev_filter_map_es] is an Lwt-Result-aware variant of {!rev_filter_map}. *)
val rev_filter_map_es :
('a -> ('b option, 'trace) result Lwt.t) ->
'a list ->
('b list, 'trace) result Lwt.t
(** [filter_map_es] is an Lwt-Result-aware variant of {!filter_map}. *)
val filter_map_es :
('a -> ('b option, 'trace) result Lwt.t) ->
'a list ->
('b list, 'trace) result Lwt.t
(** [filter_map_p] is a variant of {!filter_map_s} where the promises are evaluated concurrently. *)
val filter_map_p : ('a -> 'b option Lwt.t) -> 'a list -> 'b list Lwt.t
val concat_map : ('a -> 'b list) -> 'a list -> 'b list
(** [concat_map_s] is an Lwt-aware variant of {!concat_map}. *)
val concat_map_s : ('a -> 'b list Lwt.t) -> 'a list -> 'b list Lwt.t
(** [concat_map_e] is a Result-aware variant of {!concat_map}. *)
val concat_map_e :
('a -> ('b list, 'error) result) -> 'a list -> ('b list, 'error) result
(** [concat_map_es] is an Lwt-Result-aware variant of {!concat_map}. *)
val concat_map_es :
('a -> ('b list, 'error) result Lwt.t) ->
'a list ->
('b list, 'error) result Lwt.t
(** [concat_map_p] is a variant of {!concat_map_s} where the promises are evaluated concurrently. *)
val concat_map_p : ('a -> 'b list Lwt.t) -> 'a list -> 'b list Lwt.t
val fold_left : ('a -> 'b -> 'a) -> 'a -> 'b list -> 'a
(** [fold_left_e] is a Result-aware variant of {!fold_left}. *)
val fold_left_e :
('a -> 'b -> ('a, 'trace) result) -> 'a -> 'b list -> ('a, 'trace) result
(** [fold_left_s] is an Lwt-aware variant of {!fold_left}. *)
val fold_left_s : ('a -> 'b -> 'a Lwt.t) -> 'a -> 'b list -> 'a Lwt.t
(** [fold_left_es] is an Lwt-Result-aware variant of {!fold_left}. *)
val fold_left_es :
('a -> 'b -> ('a, 'trace) result Lwt.t) ->
'a ->
'b list ->
('a, 'trace) result Lwt.t
(** [fold_left_map f a xs] is a combination of [fold_left] and [map] that maps
over all elements of [xs] and threads an accumulator with initial value [a]
through calls to [f]. *)
val fold_left_map : ('a -> 'b -> 'a * 'c) -> 'a -> 'b list -> 'a * 'c list
(** [fold_left_map_e f a xs] is a combination of [fold_left_e] and [map_e] that
maps over all elements of [xs] and threads an accumulator with initial
value [a] through calls to [f]. The list is traversed from left to right
and the first encountered error is returned. *)
val fold_left_map_e :
('a -> 'b -> ('a * 'c, 'trace) result) ->
'a ->
'b list ->
('a * 'c list, 'trace) result
(** [fold_left_map_s f a xs] is a combination of [fold_left_s] and [map_s] that
maps over all elements of [xs] and threads an accumulator with initial
value [a] through calls to [f]. *)
val fold_left_map_s :
('a -> 'b -> ('a * 'c) Lwt.t) -> 'a -> 'b list -> ('a * 'c list) Lwt.t
(** [fold_left_map_es f a xs] is a combination of [fold_left_es] and [map_es] that
maps over all elements of [xs] and threads an accumulator with initial
value [a] through calls to [f]. The list is traversed from left to right
and the first encountered error is returned. *)
val fold_left_map_es :
('a -> 'b -> ('a * 'c, 'trace) result Lwt.t) ->
'a ->
'b list ->
('a * 'c list, 'trace) result Lwt.t
val fold_left_i : (int -> 'a -> 'b -> 'a) -> 'a -> 'b list -> 'a
val fold_left_i_e :
(int -> 'a -> 'b -> ('a, 'trace) result) ->
'a ->
'b list ->
('a, 'trace) result
val fold_left_i_s : (int -> 'a -> 'b -> 'a Lwt.t) -> 'a -> 'b list -> 'a Lwt.t
val fold_left_i_es :
(int -> 'a -> 'b -> ('a, 'trace) result Lwt.t) ->
'a ->
'b list ->
('a, 'trace) result Lwt.t
(** This function is not tail-recursive *)
val fold_right : ('a -> 'b -> 'b) -> 'a list -> 'b -> 'b
(** This function is not tail-recursive *)
val fold_right_e :
('a -> 'b -> ('b, 'trace) result) -> 'a list -> 'b -> ('b, 'trace) result
(** This function is not tail-recursive *)
val fold_right_s : ('a -> 'b -> 'b Lwt.t) -> 'a list -> 'b -> 'b Lwt.t
(** This function is not tail-recursive *)
val fold_right_es :
('a -> 'b -> ('b, 'trace) result Lwt.t) ->
'a list ->
'b ->
('b, 'trace) result Lwt.t
(** {3 Double-traversal variants}
As mentioned above, there are no [_p] and [_ep] double-traversors. Use
{!combine} (and variants) to circumvent this. *)
val iter2_e :
when_different_lengths:'trace ->
('a -> 'b -> (unit, 'trace) result) ->
'a list ->
'b list ->
(unit, 'trace) result
val iter2_s :
when_different_lengths:'trace ->
('a -> 'b -> unit Lwt.t) ->
'a list ->
'b list ->
(unit, 'trace) result Lwt.t
val iter2_es :
when_different_lengths:'trace ->
('a -> 'b -> (unit, 'trace) result Lwt.t) ->
'a list ->
'b list ->
(unit, 'trace) result Lwt.t
val map2_e :
when_different_lengths:'trace ->
('a -> 'b -> ('c, 'trace) result) ->
'a list ->
'b list ->
('c list, 'trace) result
val map2_s :
when_different_lengths:'trace ->
('a -> 'b -> 'c Lwt.t) ->
'a list ->
'b list ->
('c list, 'trace) result Lwt.t
val map2_es :
when_different_lengths:'trace ->
('a -> 'b -> ('c, 'trace) result Lwt.t) ->
'a list ->
'b list ->
('c list, 'trace) result Lwt.t
val rev_map2_e :
when_different_lengths:'trace ->
('a -> 'b -> ('c, 'trace) result) ->
'a list ->
'b list ->
('c list, 'trace) result
val rev_map2_s :
when_different_lengths:'trace ->
('a -> 'b -> 'c Lwt.t) ->
'a list ->
'b list ->
('c list, 'trace) result Lwt.t
val rev_map2_es :
when_different_lengths:'trace ->
('a -> 'b -> ('c, 'trace) result Lwt.t) ->
'a list ->
'b list ->
('c list, 'trace) result Lwt.t
val fold_left2_e :
when_different_lengths:'trace ->
('a -> 'b -> 'c -> ('a, 'trace) result) ->
'a ->
'b list ->
'c list ->
('a, 'trace) result
val fold_left2_s :
when_different_lengths:'trace ->
('a -> 'b -> 'c -> 'a Lwt.t) ->
'a ->
'b list ->
'c list ->
('a, 'trace) result Lwt.t
val fold_left2_es :
when_different_lengths:'trace ->
('a -> 'b -> 'c -> ('a, 'trace) result Lwt.t) ->
'a ->
'b list ->
'c list ->
('a, 'trace) result Lwt.t
(** This function is not tail-recursive *)
val fold_right2_e :
when_different_lengths:'trace ->
('a -> 'b -> 'c -> ('c, 'trace) result) ->
'a list ->
'b list ->
'c ->
('c, 'trace) result
(** This function is not tail-recursive *)
val fold_right2_s :
when_different_lengths:'trace ->
('a -> 'b -> 'c -> 'c Lwt.t) ->
'a list ->
'b list ->
'c ->
('c, 'trace) result Lwt.t
(** This function is not tail-recursive *)
val fold_right2_es :
when_different_lengths:'trace ->
('a -> 'b -> 'c -> ('c, 'trace) result Lwt.t) ->
'a list ->
'b list ->
'c ->
('c, 'trace) result Lwt.t
(** {3 Scanning variants} *)
val for_all : ('a -> bool) -> 'a list -> bool
val for_all_e :
('a -> (bool, 'trace) result) -> 'a list -> (bool, 'trace) result
val for_all_s : ('a -> bool Lwt.t) -> 'a list -> bool Lwt.t
val for_all_es :
('a -> (bool, 'trace) result Lwt.t) ->
'a list ->
(bool, 'trace) result Lwt.t
val for_all_p : ('a -> bool Lwt.t) -> 'a list -> bool Lwt.t
val exists : ('a -> bool) -> 'a list -> bool
val exists_e :
('a -> (bool, 'trace) result) -> 'a list -> (bool, 'trace) result
val exists_s : ('a -> bool Lwt.t) -> 'a list -> bool Lwt.t
val exists_es :
('a -> (bool, 'trace) result Lwt.t) ->
'a list ->
(bool, 'trace) result Lwt.t
val exists_p : ('a -> bool Lwt.t) -> 'a list -> bool Lwt.t
(** {3 Double-scanning variants}
As mentioned above, there are no [_p] and [_ep] double-scanners. Use
{!combine} (and variants) to circumvent this. *)
val for_all2_e :
when_different_lengths:'trace ->
('a -> 'b -> (bool, 'trace) result) ->
'a list ->
'b list ->
(bool, 'trace) result
val for_all2_s :
when_different_lengths:'trace ->
('a -> 'b -> bool Lwt.t) ->
'a list ->
'b list ->
(bool, 'trace) result Lwt.t
val for_all2_es :
when_different_lengths:'trace ->
('a -> 'b -> (bool, 'trace) result Lwt.t) ->
'a list ->
'b list ->
(bool, 'trace) result Lwt.t
val exists2_e :
when_different_lengths:'trace ->
('a -> 'b -> (bool, 'trace) result) ->
'a list ->
'b list ->
(bool, 'trace) result
val exists2_s :
when_different_lengths:'trace ->
('a -> 'b -> bool Lwt.t) ->
'a list ->
'b list ->
(bool, 'trace) result Lwt.t
val exists2_es :
when_different_lengths:'trace ->
('a -> 'b -> (bool, 'trace) result Lwt.t) ->
'a list ->
'b list ->
(bool, 'trace) result Lwt.t
(** {3 Combine variants}
These are primarily intended to be used for preprocessing before applying
a traversor to the resulting list of pairs. They give alternatives to the
[when_different_lengths] mechanism of the immediate double-traversors
above.
In case the semantic of, say, [map2_es] was unsatisfying, one can use
[map_es] on a [combine]-preprocessed pair of lists. The different variants
of [combine] give different approaches to different-length handling. *)
(** [combine_drop ll lr] is a list [l] of pairs of elements taken from the
common-length prefix of [ll] and [lr]. The suffix of whichever list is
longer (if any) is dropped.
More formally [nth l n] is:
- [None] if [n >= min (length ll) (length lr)]
- [Some (Option.get @@ nth ll n, Option.get @@ nth lr n)] otherwise
*)
val combine_drop : 'a list -> 'b list -> ('a * 'b) list
(** [combine_with_leftovers ll lr] is a tuple [(combined, leftover)]
where [combined] is [combine_drop ll lr]
and [leftover] is either [Either.Left lsuffix] or [Either.Right rsuffix]
depending on which of [ll] or [lr] is longer. [leftover] is [None] if the
two lists have the same length. *)
val combine_with_leftovers :
'a list -> 'b list -> ('a * 'b) list * ('a list, 'b list) Either.t option
(** {3 Comparison and equality}
The comparison and equality functions are those of the OCaml [Stdlib]. *)
val compare : ('a -> 'a -> int) -> 'a list -> 'a list -> int
val compare_lengths : 'a list -> 'b list -> int
val compare_length_with : 'a list -> int -> int
val equal : ('a -> 'a -> bool) -> 'a list -> 'a list -> bool
(** {3 Sorting}
The sorting functions are those of the OCaml [Stdlib]. *)
val sort : ('a -> 'a -> int) -> 'a list -> 'a list
val stable_sort : ('a -> 'a -> int) -> 'a list -> 'a list
val fast_sort : ('a -> 'a -> int) -> 'a list -> 'a list
val sort_uniq : ('a -> 'a -> int) -> 'a list -> 'a list
(** {3 Conversion}
The conversion functions are those of the OCaml [Stdlib]. *)
val to_seq : 'a list -> 'a Seq.t
val of_seq : 'a Seq.t -> 'a list
val init_ep :
when_negative_length:'error ->
int ->
(int -> ('a, 'error Error_monad.trace) result Lwt.t) ->
('a list, 'error Error_monad.trace) result Lwt.t
val filter_ep :
('a -> (bool, 'error Error_monad.trace) result Lwt.t) ->
'a list ->
('a list, 'error Error_monad.trace) result Lwt.t
val partition_ep :
('a -> (bool, 'error Error_monad.trace) result Lwt.t) ->
'a list ->
('a list * 'a list, 'error Error_monad.trace) result Lwt.t
val partition_map_ep :
('a -> (('b, 'c) Either.t, 'error Error_monad.trace) result Lwt.t) ->
'a list ->
('b list * 'c list, 'error Error_monad.trace) result Lwt.t
val iter_ep :
('a -> (unit, 'error Error_monad.trace) result Lwt.t) ->
'a list ->
(unit, 'error Error_monad.trace) result Lwt.t
val iteri_ep :
(int -> 'a -> (unit, 'error Error_monad.trace) result Lwt.t) ->
'a list ->
(unit, 'error Error_monad.trace) result Lwt.t
val map_ep :
('a -> ('b, 'error Error_monad.trace) result Lwt.t) ->
'a list ->
('b list, 'error Error_monad.trace) result Lwt.t
val mapi_ep :
(int -> 'a -> ('b, 'error Error_monad.trace) result Lwt.t) ->
'a list ->
('b list, 'error Error_monad.trace) result Lwt.t
val rev_map_ep :
('a -> ('b, 'error Error_monad.trace) result Lwt.t) ->
'a list ->
('b list, 'error Error_monad.trace) result Lwt.t
val rev_mapi_ep :
(int -> 'a -> ('b, 'error Error_monad.trace) result Lwt.t) ->
'a list ->
('b list, 'error Error_monad.trace) result Lwt.t
val filter_map_ep :
('a -> ('b option, 'error Error_monad.trace) result Lwt.t) ->
'a list ->
('b list, 'error Error_monad.trace) result Lwt.t
val concat_map_ep :
('a -> ('b list, 'error trace) result Lwt.t) ->
'a list ->
('b list, 'error trace) result Lwt.t
val for_all_ep :
('a -> (bool, 'error Error_monad.trace) result Lwt.t) ->
'a list ->
(bool, 'error Error_monad.trace) result Lwt.t
val exists_ep :
('a -> (bool, 'error Error_monad.trace) result Lwt.t) ->
'a list ->
(bool, 'error Error_monad.trace) result Lwt.t
end
# 54 "v5.in.ml"
module Set : sig
# 1 "v5/set.mli"
module type S = sig
type elt
type t
val empty : t
val is_empty : t -> bool
val mem : elt -> t -> bool
val add : elt -> t -> t
val singleton : elt -> t
val remove : elt -> t -> t
val union : t -> t -> t
val inter : t -> t -> t
val disjoint : t -> t -> bool
val diff : t -> t -> t
val compare : t -> t -> int
val equal : t -> t -> bool
val subset : t -> t -> bool
val iter : (elt -> unit) -> t -> unit
val iter_e : (elt -> (unit, 'trace) result) -> t -> (unit, 'trace) result
val iter_s : (elt -> unit Lwt.t) -> t -> unit Lwt.t
val iter_p : (elt -> unit Lwt.t) -> t -> unit Lwt.t
val iter_es :
(elt -> (unit, 'trace) result Lwt.t) -> t -> (unit, 'trace) result Lwt.t
val map : (elt -> elt) -> t -> t
val fold : (elt -> 'a -> 'a) -> t -> 'a -> 'a
val fold_e :
(elt -> 'a -> ('a, 'trace) result) -> t -> 'a -> ('a, 'trace) result
val fold_s : (elt -> 'a -> 'a Lwt.t) -> t -> 'a -> 'a Lwt.t
val fold_es :
(elt -> 'a -> ('a, 'trace) result Lwt.t) ->
t ->
'a ->
('a, 'trace) result Lwt.t
val for_all : (elt -> bool) -> t -> bool
val exists : (elt -> bool) -> t -> bool
val filter : (elt -> bool) -> t -> t
val filter_map : (elt -> elt option) -> t -> t
val partition : (elt -> bool) -> t -> t * t
val cardinal : t -> int
val elements : t -> elt list
val min_elt : t -> elt option
val min_elt_opt : t -> elt option
val max_elt : t -> elt option
val max_elt_opt : t -> elt option
val choose : t -> elt option
val choose_opt : t -> elt option
val split : elt -> t -> t * bool * t
val find : elt -> t -> elt option
val find_opt : elt -> t -> elt option
val find_first : (elt -> bool) -> t -> elt option
val find_first_opt : (elt -> bool) -> t -> elt option
val find_last : (elt -> bool) -> t -> elt option
val find_last_opt : (elt -> bool) -> t -> elt option
val of_list : elt list -> t
val to_seq_from : elt -> t -> elt Seq.t
val to_seq : t -> elt Seq.t
val to_rev_seq : t -> elt Seq.t
val add_seq : elt Seq.t -> t -> t
val of_seq : elt Seq.t -> t
val iter_ep :
(elt -> (unit, 'error Error_monad.trace) result Lwt.t) ->
t ->
(unit, 'error Error_monad.trace) result Lwt.t
end
module Make (Ord : Compare.COMPARABLE) : S with type elt = Ord.t
end
# 56 "v5.in.ml"
module Map : sig
# 1 "v5/map.mli"
module type S = sig
type key
type +!'a t
val empty : 'a t
val is_empty : 'a t -> bool
val mem : key -> 'a t -> bool
val add : key -> 'a -> 'a t -> 'a t
val update : key -> ('a option -> 'a option) -> 'a t -> 'a t
val singleton : key -> 'a -> 'a t
val remove : key -> 'a t -> 'a t
val merge :
(key -> 'a option -> 'b option -> 'c option) -> 'a t -> 'b t -> 'c t
val union : (key -> 'a -> 'a -> 'a option) -> 'a t -> 'a t -> 'a t
val compare : ('a -> 'a -> int) -> 'a t -> 'a t -> int
val equal : ('a -> 'a -> bool) -> 'a t -> 'a t -> bool
val iter : (key -> 'a -> unit) -> 'a t -> unit
(** [iter_e f m] applies [f] to the bindings of [m] one by one in an
unspecified order. If all the applications result in [Ok ()], then the
result of the iteration is [Ok ()]. If any of the applications results in
[Error e] then the iteration stops and the result of the iteration is
[Error e]. *)
val iter_e :
(key -> 'a -> (unit, 'trace) result) -> 'a t -> (unit, 'trace) result
val iter_s : (key -> 'a -> unit Lwt.t) -> 'a t -> unit Lwt.t
val iter_p : (key -> 'a -> unit Lwt.t) -> 'a t -> unit Lwt.t
(** [iter_es f m] applies [f] to the bindings of [m] in an unspecified order,
one after the other as the promises resolve. If all the applications
result in [Ok ()], then the result of the iteration is [Ok ()]. If any of
the applications results in [Error e] then the iteration stops and the
result of the iteration is [Error e]. *)
val iter_es :
(key -> 'a -> (unit, 'trace) result Lwt.t) ->
'a t ->
(unit, 'trace) result Lwt.t
val fold : (key -> 'a -> 'b -> 'b) -> 'a t -> 'b -> 'b
(** [fold_e f m init] is
[f k1 d1 init >>? fun acc -> f k2 d2 acc >>? fun acc -> …] where [kN] is
the key bound to [dN] in [m]. *)
val fold_e :
(key -> 'a -> 'b -> ('b, 'trace) result) ->
'a t ->
'b ->
('b, 'trace) result
val fold_s : (key -> 'a -> 'b -> 'b Lwt.t) -> 'a t -> 'b -> 'b Lwt.t
(** [fold_es f m init] is
[f k1 d1 init >>=? fun acc -> f k2 d2 acc >>=? fun acc -> …] where [kN] is
the key bound to [dN] in [m]. *)
val fold_es :
(key -> 'a -> 'b -> ('b, 'trace) result Lwt.t) ->
'a t ->
'b ->
('b, 'trace) result Lwt.t
val for_all : (key -> 'a -> bool) -> 'a t -> bool
val exists : (key -> 'a -> bool) -> 'a t -> bool
val filter : (key -> 'a -> bool) -> 'a t -> 'a t
val filter_map : (key -> 'a -> 'b option) -> 'a t -> 'b t
val partition : (key -> 'a -> bool) -> 'a t -> 'a t * 'a t
val cardinal : 'a t -> int
val bindings : 'a t -> (key * 'a) list
val min_binding : 'a t -> (key * 'a) option
val min_binding_opt : 'a t -> (key * 'a) option
val max_binding : 'a t -> (key * 'a) option
val max_binding_opt : 'a t -> (key * 'a) option
val choose : 'a t -> (key * 'a) option
val choose_opt : 'a t -> (key * 'a) option
val split : key -> 'a t -> 'a t * 'a option * 'a t
val find : key -> 'a t -> 'a option
val find_opt : key -> 'a t -> 'a option
val find_first : (key -> bool) -> 'a t -> (key * 'a) option
val find_first_opt : (key -> bool) -> 'a t -> (key * 'a) option
val find_last : (key -> bool) -> 'a t -> (key * 'a) option
val find_last_opt : (key -> bool) -> 'a t -> (key * 'a) option
val map : ('a -> 'b) -> 'a t -> 'b t
val mapi : (key -> 'a -> 'b) -> 'a t -> 'b t
val to_seq : 'a t -> (key * 'a) Seq.t
val to_rev_seq : 'a t -> (key * 'a) Seq.t
val to_seq_from : key -> 'a t -> (key * 'a) Seq.t
val add_seq : (key * 'a) Seq.t -> 'a t -> 'a t
val of_seq : (key * 'a) Seq.t -> 'a t
val iter_ep :
(key -> 'a -> (unit, 'error Error_monad.trace) result Lwt.t) ->
'a t ->
(unit, 'error Error_monad.trace) result Lwt.t
end
module Make (Ord : Compare.COMPARABLE) : S with type key = Ord.t
end
# 58 "v5.in.ml"
module Option : sig
# 1 "v5/option.mli"
(** Signature from Lwtreslib's option module *)
type 'a t = 'a option = None | Some of 'a
val none : 'a option
val none_e : ('a option, 'trace) result
val none_s : 'a option Lwt.t
val none_es : ('a option, 'trace) result Lwt.t
val some : 'a -> 'a option
val some_unit : unit option
val some_nil : 'a list option
val some_e : 'a -> ('a option, 'trace) result
val some_s : 'a -> 'a option Lwt.t
val some_es : 'a -> ('a option, 'trace) result Lwt.t
val value : 'a option -> default:'a -> 'a
val value_e : 'a option -> error:'trace -> ('a, 'trace) result
val value_f : 'a option -> default:(unit -> 'a) -> 'a
val value_fe : 'a option -> error:(unit -> 'trace) -> ('a, 'trace) result
val bind : 'a option -> ('a -> 'b option) -> 'b option
val join : 'a option option -> 'a option
val either : 'a option -> 'a option -> 'a option
val map : ('a -> 'b) -> 'a option -> 'b option
val map_s : ('a -> 'b Lwt.t) -> 'a option -> 'b option Lwt.t
val map_e :
('a -> ('b, 'trace) result) -> 'a option -> ('b option, 'trace) result
val map_es :
('a -> ('b, 'trace) result Lwt.t) ->
'a option ->
('b option, 'trace) result Lwt.t
val fold : none:'a -> some:('b -> 'a) -> 'b option -> 'a
val fold_s : none:'a -> some:('b -> 'a Lwt.t) -> 'b option -> 'a Lwt.t
val fold_f : none:(unit -> 'a) -> some:('b -> 'a) -> 'b option -> 'a
val iter : ('a -> unit) -> 'a option -> unit
val iter_s : ('a -> unit Lwt.t) -> 'a option -> unit Lwt.t
val iter_e :
('a -> (unit, 'trace) result) -> 'a option -> (unit, 'trace) result
val iter_es :
('a -> (unit, 'trace) result Lwt.t) ->
'a option ->
(unit, 'trace) result Lwt.t
val is_none : 'a option -> bool
val is_some : 'a option -> bool
val equal : ('a -> 'a -> bool) -> 'a option -> 'a option -> bool
val compare : ('a -> 'a -> int) -> 'a option -> 'a option -> int
val to_result : none:'trace -> 'a option -> ('a, 'trace) result
val of_result : ('a, 'e) result -> 'a option
val to_list : 'a option -> 'a list
val to_seq : 'a option -> 'a Seq.t
(** [catch f] is [Some (f ())] if [f] does not raise an exception, it is
[None] otherwise.
You should only use [catch] when you truly do not care about
what exception may be raised during the evaluation of [f ()]. If you need
to inspect the raised exception, or if you need to pass it along, consider
{!Result.catch} instead.
If [catch_only] is set, then only exceptions [e] such that [catch_only e]
is [true] are caught.
Whether [catch_only] is set or not, you cannot catch non-deterministic
runtime exceptions of OCaml such as {!Stack_overflow} and
{!Out_of_memory} nor system exceptions such as {!Unix.Unix_error}. *)
val catch : ?catch_only:(exn -> bool) -> (unit -> 'a) -> 'a option
(** [catch_s f] is a promise that resolves to [Some x] if and when [f ()]
resolves to [x]. Alternatively, it resolves to [None] if and when [f ()]
is rejected.
You should only use [catch_s] when you truly do not care about
what exception may be raised during the evaluation of [f ()]. If you need
to inspect the raised exception, or if you need to pass it along, consider
{!Result.catch_s} instead.
If [catch_only] is set, then only exceptions [e] such that [catch_only e]
is [true] are caught.
Whether [catch_only] is set or not, you cannot catch non-deterministic
runtime exceptions of OCaml such as {!Stack_overflow} and
{!Out_of_memory} nor system exceptions such as {!Unix.Unix_error}. *)
val catch_s :
?catch_only:(exn -> bool) -> (unit -> 'a Lwt.t) -> 'a option Lwt.t
end
# 60 "v5.in.ml"
module Result : sig
# 1 "v5/result.mli"
type ('a, 'e) t = ('a, 'e) result = Ok of 'a | Error of 'e
val ok : 'a -> ('a, 'e) result
val ok_s : 'a -> ('a, 'e) result Lwt.t
val error : 'e -> ('a, 'e) result
val error_s : 'e -> ('a, 'e) result Lwt.t
val return : 'a -> ('a, 'e) result
val return_unit : (unit, 'e) result
val return_none : ('a option, 'e) result
val return_some : 'a -> ('a option, 'e) result
val return_nil : ('a list, 'e) result
val return_true : (bool, 'e) result
val return_false : (bool, 'e) result
val value : ('a, 'e) result -> default:'a -> 'a
val value_f : ('a, 'e) result -> default:(unit -> 'a) -> 'a
val bind : ('a, 'e) result -> ('a -> ('b, 'e) result) -> ('b, 'e) result
val bind_s :
('a, 'e) result -> ('a -> ('b, 'e) result Lwt.t) -> ('b, 'e) result Lwt.t
val bind_error : ('a, 'e) result -> ('e -> ('a, 'f) result) -> ('a, 'f) result
val bind_error_s :
('a, 'e) result -> ('e -> ('a, 'f) result Lwt.t) -> ('a, 'f) result Lwt.t
val join : (('a, 'e) result, 'e) result -> ('a, 'e) result
val map : ('a -> 'b) -> ('a, 'e) result -> ('b, 'e) result
val map_e : ('a -> ('b, 'e) result) -> ('a, 'e) result -> ('b, 'e) result
val map_s : ('a -> 'b Lwt.t) -> ('a, 'e) result -> ('b, 'e) result Lwt.t
val map_es :
('a -> ('b, 'e) result Lwt.t) -> ('a, 'e) result -> ('b, 'e) result Lwt.t
val map_error : ('e -> 'f) -> ('a, 'e) result -> ('a, 'f) result
val map_error_e : ('e -> ('a, 'f) result) -> ('a, 'e) result -> ('a, 'f) result
val map_error_s : ('e -> 'f Lwt.t) -> ('a, 'e) result -> ('a, 'f) result Lwt.t
val map_error_es :
('e -> ('a, 'f) result Lwt.t) -> ('a, 'e) result -> ('a, 'f) result Lwt.t
val fold : ok:('a -> 'c) -> error:('e -> 'c) -> ('a, 'e) result -> 'c
val iter : ('a -> unit) -> ('a, 'e) result -> unit
val iter_s : ('a -> unit Lwt.t) -> ('a, 'e) result -> unit Lwt.t
val iter_error : ('e -> unit) -> ('a, 'e) result -> unit
val iter_error_s : ('e -> unit Lwt.t) -> ('a, 'e) result -> unit Lwt.t
val is_ok : ('a, 'e) result -> bool
val is_error : ('a, 'e) result -> bool
val equal :
ok:('a -> 'a -> bool) ->
error:('e -> 'e -> bool) ->
('a, 'e) result ->
('a, 'e) result ->
bool
val compare :
ok:('a -> 'a -> int) ->
error:('e -> 'e -> int) ->
('a, 'e) result ->
('a, 'e) result ->
int
val to_option : ('a, 'e) result -> 'a option
val of_option : error:'e -> 'a option -> ('a, 'e) result
val to_list : ('a, 'e) result -> 'a list
val to_seq : ('a, 'e) result -> 'a Seq.t
(** [catch f] is [try Ok (f ()) with e -> Error e]: it is [Ok x] if [f ()]
evaluates to [x], and it is [Error e] if [f ()] raises [e].
See {!WithExceptions.S.Result.to_exn} for a converse function.
If [catch_only] is set, then only exceptions [e] such that [catch_only e]
is [true] are caught.
Whether [catch_only] is set or not, you cannot catch non-deterministic
runtime exceptions of OCaml such as {!Stack_overflow} and
{!Out_of_memory} nor system exceptions such as {!Unix.Unix_error}. *)
val catch : ?catch_only:(exn -> bool) -> (unit -> 'a) -> ('a, exn) result
(** [catch_f f handler] is equivalent to [map_error (catch f) handler].
In other words, it catches exceptions in [f ()] and either returns the
value in an [Ok] or passes the exception to [handler] for the [Error].
[catch_only] has the same use as with [catch]. The same restriction on
catching non-deterministic runtime exceptions applies. *)
val catch_f :
?catch_only:(exn -> bool) ->
(unit -> 'a) ->
(exn -> 'error) ->
('a, 'error) result
(** [catch_s] is [catch] but for Lwt promises. Specifically, [catch_s f]
returns a promise that resolves to [Ok x] if and when [f ()] resolves to
[x], or to [Error exc] if and when [f ()] is rejected with [exc].
If [catch_only] is set, then only exceptions [e] such that [catch_only e]
is [true] are caught.
Whether [catch_only] is set or not, you cannot catch non-deterministic
runtime exceptions of OCaml such as {!Stack_overflow} and
{!Out_of_memory} nor system exceptions such as {!Unix.Unix_error}. *)
val catch_s :
?catch_only:(exn -> bool) -> (unit -> 'a Lwt.t) -> ('a, exn) result Lwt.t
end
# 62 "v5.in.ml"
module RPC_arg : sig
# 1 "v5/RPC_arg.mli"
(** See [src/lib_rpc/RPC_arg.mli] for documentation *)
type 'a t
type 'a arg = 'a t
val make :
?descr:string ->
name:string ->
destruct:(string -> ('a, string) result) ->
construct:('a -> string) ->
unit ->
'a arg
type descr = {name : string; descr : string option}
val descr : 'a arg -> descr
val bool : bool arg
val int : int arg
val uint : int arg
val int32 : int32 arg
val uint31 : int32 arg
val int64 : int64 arg
val uint63 : int64 arg
val string : string arg
val like : 'a arg -> ?descr:string -> string -> 'a arg
type ('a, 'b) eq = Eq : ('a, 'a) eq
val eq : 'a arg -> 'b arg -> ('a, 'b) eq option
end
# 64 "v5.in.ml"
module RPC_path : sig
# 1 "v5/RPC_path.mli"
type ('prefix, 'params) t
type ('prefix, 'params) path = ('prefix, 'params) t
type 'prefix context = ('prefix, 'prefix) path
val root : unit context
val open_root : 'a context
val add_suffix : ('prefix, 'params) path -> string -> ('prefix, 'params) path
val ( / ) : ('prefix, 'params) path -> string -> ('prefix, 'params) path
val add_arg :
('prefix, 'params) path -> 'a RPC_arg.t -> ('prefix, 'params * 'a) path
val ( /: ) :
('prefix, 'params) path -> 'a RPC_arg.t -> ('prefix, 'params * 'a) path
val add_final_args :
('prefix, 'params) path -> 'a RPC_arg.t -> ('prefix, 'params * 'a list) path
val ( /:* ) :
('prefix, 'params) path -> 'a RPC_arg.t -> ('prefix, 'params * 'a list) path
end
# 66 "v5.in.ml"
module RPC_query : sig
# 1 "v5/RPC_query.mli"
type 'a t
type 'a query = 'a t
val empty : unit query
type ('a, 'b) field
val field :
?descr:string -> string -> 'a RPC_arg.t -> 'a -> ('b -> 'a) -> ('b, 'a) field
val opt_field :
?descr:string ->
string ->
'a RPC_arg.t ->
('b -> 'a option) ->
('b, 'a option) field
val flag : ?descr:string -> string -> ('b -> bool) -> ('b, bool) field
val multi_field :
?descr:string ->
string ->
'a RPC_arg.t ->
('b -> 'a list) ->
('b, 'a list) field
type ('a, 'b, 'c) open_query
val query : 'b -> ('a, 'b, 'b) open_query
val ( |+ ) :
('a, 'b, 'c -> 'd) open_query -> ('a, 'c) field -> ('a, 'b, 'd) open_query
val seal : ('a, 'b, 'a) open_query -> 'a t
type untyped = (string * string) list
exception Invalid of string
val parse : 'a query -> untyped -> 'a
end
# 68 "v5.in.ml"
module RPC_service : sig
# 1 "v5/RPC_service.mli"
(** HTTP methods. *)
type meth = [`GET | `POST | `DELETE | `PUT | `PATCH]
type (+'meth, 'prefix, 'params, 'query, 'input, 'output) t
constraint 'meth = [< meth]
type (+'meth, 'prefix, 'params, 'query, 'input, 'output) service =
('meth, 'prefix, 'params, 'query, 'input, 'output) t
val get_service :
?description:string ->
query:'query RPC_query.t ->
output:'output Data_encoding.t ->
('prefix, 'params) RPC_path.t ->
([`GET], 'prefix, 'params, 'query, unit, 'output) service
val post_service :
?description:string ->
query:'query RPC_query.t ->
input:'input Data_encoding.t ->
output:'output Data_encoding.t ->
('prefix, 'params) RPC_path.t ->
([`POST], 'prefix, 'params, 'query, 'input, 'output) service
val delete_service :
?description:string ->
query:'query RPC_query.t ->
output:'output Data_encoding.t ->
('prefix, 'params) RPC_path.t ->
([`DELETE], 'prefix, 'params, 'query, unit, 'output) service
val patch_service :
?description:string ->
query:'query RPC_query.t ->
input:'input Data_encoding.t ->
output:'output Data_encoding.t ->
('prefix, 'params) RPC_path.t ->
([`PATCH], 'prefix, 'params, 'query, 'input, 'output) service
val put_service :
?description:string ->
query:'query RPC_query.t ->
input:'input Data_encoding.t ->
output:'output Data_encoding.t ->
('prefix, 'params) RPC_path.t ->
([`PUT], 'prefix, 'params, 'query, 'input, 'output) service
end
# 70 "v5.in.ml"
module RPC_answer : sig
# 1 "v5/RPC_answer.mli"
(** Return type for service handler *)
type 'o t =
[ `Ok of 'o
| `OkChunk of 'o
| `OkStream of 'o stream
| `Created of string option
| `No_content
| `Unauthorized of error list option
| `Forbidden of error list option
| `Not_found of error list option
| `Conflict of error list option
| `Error of error list option ]
and 'a stream = {next : unit -> 'a option Lwt.t; shutdown : unit -> unit}
val return : 'o -> 'o t Lwt.t
(** [return_chunked] is identical to [return] but it indicates to the server
that the result might be long and that the serialisation should be done in
mutliple chunks.
You should use [return_chunked] when returning an (unbounded or potentially
large) list, array, map, or other such set. *)
val return_chunked : 'o -> 'o t Lwt.t
val return_stream : 'o stream -> 'o t Lwt.t
val not_found : 'o t Lwt.t
val fail : error list -> 'a t Lwt.t
end
# 72 "v5.in.ml"
module RPC_directory : sig
# 1 "v5/RPC_directory.mli"
(** Dispatch tree *)
type 'prefix t
type 'prefix directory = 'prefix t
(** Empty list of dispatch trees *)
val empty : 'prefix directory
val map : ('a -> 'b Lwt.t) -> 'b directory -> 'a directory
val prefix : ('pr, 'p) RPC_path.path -> 'p directory -> 'pr directory
val merge : 'a directory -> 'a directory -> 'a directory
(** Possible error while registering services. *)
type step =
| Static of string
| Dynamic of RPC_arg.descr
| DynamicTail of RPC_arg.descr
type conflict =
| CService of RPC_service.meth
| CDir
| CBuilder
| CTail
| CTypes of RPC_arg.descr * RPC_arg.descr
| CType of RPC_arg.descr * string list
exception Conflict of step list * conflict
(** Registering handler in service tree.
The [chunked] parameter controls whether the answer to the RPC is chunk
encoded (i.e., the serialisation is split and the caller receives the answer
in multiple chunks) or not. Defaults to [false]. Set to [true] for RPCs that
return potentially large collections (e.g., unbounded lists). *)
val register :
chunked:bool ->
'prefix directory ->
('meth, 'prefix, 'params, 'query, 'input, 'output) RPC_service.t ->
('params -> 'query -> 'input -> 'output tzresult Lwt.t) ->
'prefix directory
val opt_register :
chunked:bool ->
'prefix directory ->
('meth, 'prefix, 'params, 'query, 'input, 'output) RPC_service.t ->
('params -> 'query -> 'input -> 'output option tzresult Lwt.t) ->
'prefix directory
val gen_register :
'prefix directory ->
('meth, 'prefix, 'params, 'query, 'input, 'output) RPC_service.t ->
('params -> 'query -> 'input -> [< 'output RPC_answer.t] Lwt.t) ->
'prefix directory
val lwt_register :
chunked:bool ->
'prefix directory ->
('meth, 'prefix, 'params, 'query, 'input, 'output) RPC_service.t ->
('params -> 'query -> 'input -> 'output Lwt.t) ->
'prefix directory
(** Registering handler in service tree. Curryfied variant. *)
val register0 :
chunked:bool ->
unit directory ->
('m, unit, unit, 'q, 'i, 'o) RPC_service.t ->
('q -> 'i -> 'o tzresult Lwt.t) ->
unit directory
val register1 :
chunked:bool ->
'prefix directory ->
('m, 'prefix, unit * 'a, 'q, 'i, 'o) RPC_service.t ->
('a -> 'q -> 'i -> 'o tzresult Lwt.t) ->
'prefix directory
val register2 :
chunked:bool ->
'prefix directory ->
('m, 'prefix, (unit * 'a) * 'b, 'q, 'i, 'o) RPC_service.t ->
('a -> 'b -> 'q -> 'i -> 'o tzresult Lwt.t) ->
'prefix directory
val register3 :
chunked:bool ->
'prefix directory ->
('m, 'prefix, ((unit * 'a) * 'b) * 'c, 'q, 'i, 'o) RPC_service.t ->
('a -> 'b -> 'c -> 'q -> 'i -> 'o tzresult Lwt.t) ->
'prefix directory
val register4 :
chunked:bool ->
'prefix directory ->
('m, 'prefix, (((unit * 'a) * 'b) * 'c) * 'd, 'q, 'i, 'o) RPC_service.t ->
('a -> 'b -> 'c -> 'd -> 'q -> 'i -> 'o tzresult Lwt.t) ->
'prefix directory
val register5 :
chunked:bool ->
'prefix directory ->
('m, 'prefix, ((((unit * 'a) * 'b) * 'c) * 'd) * 'e, 'q, 'i, 'o) RPC_service.t ->
('a -> 'b -> 'c -> 'd -> 'e -> 'q -> 'i -> 'o tzresult Lwt.t) ->
'prefix directory
val opt_register0 :
chunked:bool ->
unit directory ->
('m, unit, unit, 'q, 'i, 'o) RPC_service.t ->
('q -> 'i -> 'o option tzresult Lwt.t) ->
unit directory
val opt_register1 :
chunked:bool ->
'prefix directory ->
('m, 'prefix, unit * 'a, 'q, 'i, 'o) RPC_service.t ->
('a -> 'q -> 'i -> 'o option tzresult Lwt.t) ->
'prefix directory
val opt_register2 :
chunked:bool ->
'prefix directory ->
('m, 'prefix, (unit * 'a) * 'b, 'q, 'i, 'o) RPC_service.t ->
('a -> 'b -> 'q -> 'i -> 'o option tzresult Lwt.t) ->
'prefix directory
val opt_register3 :
chunked:bool ->
'prefix directory ->
('m, 'prefix, ((unit * 'a) * 'b) * 'c, 'q, 'i, 'o) RPC_service.t ->
('a -> 'b -> 'c -> 'q -> 'i -> 'o option tzresult Lwt.t) ->
'prefix directory
val opt_register4 :
chunked:bool ->
'prefix directory ->
('m, 'prefix, (((unit * 'a) * 'b) * 'c) * 'd, 'q, 'i, 'o) RPC_service.t ->
('a -> 'b -> 'c -> 'd -> 'q -> 'i -> 'o option tzresult Lwt.t) ->
'prefix directory
val opt_register5 :
chunked:bool ->
'prefix directory ->
('m, 'prefix, ((((unit * 'a) * 'b) * 'c) * 'd) * 'e, 'q, 'i, 'o) RPC_service.t ->
('a -> 'b -> 'c -> 'd -> 'e -> 'q -> 'i -> 'o option tzresult Lwt.t) ->
'prefix directory
val gen_register0 :
unit directory ->
('m, unit, unit, 'q, 'i, 'o) RPC_service.t ->
('q -> 'i -> [< 'o RPC_answer.t] Lwt.t) ->
unit directory
val gen_register1 :
'prefix directory ->
('m, 'prefix, unit * 'a, 'q, 'i, 'o) RPC_service.t ->
('a -> 'q -> 'i -> [< 'o RPC_answer.t] Lwt.t) ->
'prefix directory
val gen_register2 :
'prefix directory ->
('m, 'prefix, (unit * 'a) * 'b, 'q, 'i, 'o) RPC_service.t ->
('a -> 'b -> 'q -> 'i -> [< 'o RPC_answer.t] Lwt.t) ->
'prefix directory
val gen_register3 :
'prefix directory ->
('m, 'prefix, ((unit * 'a) * 'b) * 'c, 'q, 'i, 'o) RPC_service.t ->
('a -> 'b -> 'c -> 'q -> 'i -> [< 'o RPC_answer.t] Lwt.t) ->
'prefix directory
val gen_register4 :
'prefix directory ->
('m, 'prefix, (((unit * 'a) * 'b) * 'c) * 'd, 'q, 'i, 'o) RPC_service.t ->
('a -> 'b -> 'c -> 'd -> 'q -> 'i -> [< 'o RPC_answer.t] Lwt.t) ->
'prefix directory
val gen_register5 :
'prefix directory ->
('m, 'prefix, ((((unit * 'a) * 'b) * 'c) * 'd) * 'e, 'q, 'i, 'o) RPC_service.t ->
('a -> 'b -> 'c -> 'd -> 'e -> 'q -> 'i -> [< 'o RPC_answer.t] Lwt.t) ->
'prefix directory
val lwt_register0 :
chunked:bool ->
unit directory ->
('m, unit, unit, 'q, 'i, 'o) RPC_service.t ->
('q -> 'i -> 'o Lwt.t) ->
unit directory
val lwt_register1 :
chunked:bool ->
'prefix directory ->
('m, 'prefix, unit * 'a, 'q, 'i, 'o) RPC_service.t ->
('a -> 'q -> 'i -> 'o Lwt.t) ->
'prefix directory
val lwt_register2 :
chunked:bool ->
'prefix directory ->
('m, 'prefix, (unit * 'a) * 'b, 'q, 'i, 'o) RPC_service.t ->
('a -> 'b -> 'q -> 'i -> 'o Lwt.t) ->
'prefix directory
val lwt_register3 :
chunked:bool ->
'prefix directory ->
('m, 'prefix, ((unit * 'a) * 'b) * 'c, 'q, 'i, 'o) RPC_service.t ->
('a -> 'b -> 'c -> 'q -> 'i -> 'o Lwt.t) ->
'prefix directory
val lwt_register4 :
chunked:bool ->
'prefix directory ->
('m, 'prefix, (((unit * 'a) * 'b) * 'c) * 'd, 'q, 'i, 'o) RPC_service.t ->
('a -> 'b -> 'c -> 'd -> 'q -> 'i -> 'o Lwt.t) ->
'prefix directory
val lwt_register5 :
chunked:bool ->
'prefix directory ->
('m, 'prefix, ((((unit * 'a) * 'b) * 'c) * 'd) * 'e, 'q, 'i, 'o) RPC_service.t ->
('a -> 'b -> 'c -> 'd -> 'e -> 'q -> 'i -> 'o Lwt.t) ->
'prefix directory
(** Registering dynamic subtree. *)
val register_dynamic_directory :
?descr:string ->
'prefix directory ->
('prefix, 'a) RPC_path.t ->
('a -> 'a directory Lwt.t) ->
'prefix directory
end
# 74 "v5.in.ml"
module Base58 : sig
# 1 "v5/base58.mli"
type 'a encoding
(** Decoder for a given kind of data. It returns [None] when
the decoded data does not start with the expected prefix. *)
val simple_decode : 'a encoding -> string -> 'a option
(** Encoder for a given kind of data. *)
val simple_encode : 'a encoding -> 'a -> string
(** An extensible sum-type for decoded data: one case per known
"prefix". See for instance [Hash.Block_hash.Hash] or
[Environment.Ed25519.Public_key_hash]. *)
type data = ..
(** Register a new encoding. The function might raise [Invalid_arg] if
the provided [prefix] overlaps with a previously registered
prefix. The [to_raw] and [of_raw] are the ad-hoc
serialisation/deserialisation for the data. The [wrap] should wrap
the deserialised value into the extensible sum-type [data] (see
the generic function [decode]). *)
val register_encoding :
prefix:string ->
length:int ->
to_raw:('a -> string) ->
of_raw:(string -> 'a option) ->
wrap:('a -> data) ->
'a encoding
(** Checks that an encoding has a certain prefix and length. *)
val check_encoded_prefix : 'a encoding -> string -> int -> unit
(** Generic decoder. It returns [None] when the decoded data does
not start with a registered prefix. *)
val decode : string -> data option
end
# 76 "v5.in.ml"
module S : sig
# 1 "v5/s.mli"
(** Generic interface for a datatype with comparison, pretty-printer
and serialization functions. *)
module type T = sig
type t
include Compare.S with type t := t
val pp : Format.formatter -> t -> unit
val encoding : t Data_encoding.t
val to_bytes : t -> bytes
val of_bytes : bytes -> t option
end
(** Generic interface for a datatype with comparison, pretty-printer,
serialization functions and a hashing function. *)
module type HASHABLE = sig
include T
type hash
val hash : t -> hash
val hash_raw : bytes -> hash
end
(** {2 Hash Types} *)
(** The signature of an abstract hash type, as produced by functor
{!Make_SHA256}. The {!t} type is abstracted for separating the
various kinds of hashes in the system at typing time. Each type is
equipped with functions to use it as is of as keys in the database
or in memory sets and maps. *)
module type MINIMAL_HASH = sig
type t
val name : string
val title : string
val pp : Format.formatter -> t -> unit
val pp_short : Format.formatter -> t -> unit
include Compare.S with type t := t
val hash_bytes : ?key:bytes -> bytes list -> t
val hash_string : ?key:string -> string list -> t
val zero : t
end
module type RAW_DATA = sig
type t
val size : int
val to_bytes : t -> bytes
val of_bytes_opt : bytes -> t option
val of_bytes_exn : bytes -> t
end
module type B58_DATA = sig
type t
val to_b58check : t -> string
val to_short_b58check : t -> string
val of_b58check_exn : string -> t
val of_b58check_opt : string -> t option
type Base58.data += Data of t
val b58check_encoding : t Base58.encoding
end
module type ENCODER = sig
type t
val encoding : t Data_encoding.t
val rpc_arg : t RPC_arg.t
end
module type INDEXES_SET = sig
include Set.S
val random_elt : t -> elt
val encoding : t Data_encoding.t
end
module type INDEXES_MAP = sig
include Map.S
val encoding : 'a Data_encoding.t -> 'a t Data_encoding.t
end
module type INDEXES = sig
type t
module Set : INDEXES_SET with type elt = t
module Map : INDEXES_MAP with type key = t
end
module type HASH = sig
include MINIMAL_HASH
include RAW_DATA with type t := t
include B58_DATA with type t := t
include ENCODER with type t := t
include INDEXES with type t := t
end
module type MERKLE_TREE = sig
type elt
include HASH
val compute : elt list -> t
val empty : t
type path = Left of path * t | Right of t * path | Op
val compute_path : elt list -> int -> path
val check_path : path -> elt -> t * int
val path_encoding : path Data_encoding.t
end
module type SIGNATURE_PUBLIC_KEY_HASH = sig
type t
val pp : Format.formatter -> t -> unit
val pp_short : Format.formatter -> t -> unit
include Compare.S with type t := t
include RAW_DATA with type t := t
include B58_DATA with type t := t
include ENCODER with type t := t
include INDEXES with type t := t
val zero : t
end
module type SIGNATURE_PUBLIC_KEY = sig
type t
val pp : Format.formatter -> t -> unit
include Compare.S with type t := t
include B58_DATA with type t := t
include ENCODER with type t := t
type public_key_hash_t
val hash : t -> public_key_hash_t
val size : t -> int
val of_bytes_without_validation : bytes -> t option
end
module type SIGNATURE = sig
module Public_key_hash : SIGNATURE_PUBLIC_KEY_HASH
module Public_key :
SIGNATURE_PUBLIC_KEY with type public_key_hash_t := Public_key_hash.t
type t
val pp : Format.formatter -> t -> unit
include RAW_DATA with type t := t
include Compare.S with type t := t
include B58_DATA with type t := t
include ENCODER with type t := t
val zero : t
type watermark
(** Check a signature *)
val check : ?watermark:watermark -> Public_key.t -> t -> bytes -> bool
end
module type FIELD = sig
type t
(** The order of the finite field *)
val order : Z.t
(** Minimal number of bytes required to encode a value of the field. *)
val size_in_bytes : int
(** [check_bytes bs] returns [true] if [bs] is a correct byte
representation of a field element *)
val check_bytes : Bytes.t -> bool
(** The neutral element for the addition *)
val zero : t
(** The neutral element for the multiplication *)
val one : t
(** [add a b] returns [a + b mod order] *)
val add : t -> t -> t
(** [mul a b] returns [a * b mod order] *)
val mul : t -> t -> t
(** [eq a b] returns [true] if [a = b mod order], else [false] *)
val eq : t -> t -> bool
(** [negate x] returns [-x mod order]. Equivalently, [negate x] returns the
unique [y] such that [x + y mod order = 0]
*)
val negate : t -> t
(** [inverse_opt x] returns [x^-1] if [x] is not [0] as an option, else [None] *)
val inverse_opt : t -> t option
(** [pow x n] returns [x^n] *)
val pow : t -> Z.t -> t
(** From a predefined bytes representation, construct a value t. It is not
required that to_bytes [(Option.get (of_bytes_opt t)) = t]. By default,
little endian encoding is used and the given element is modulo the prime
order *)
val of_bytes_opt : Bytes.t -> t option
(** Convert the value t to a bytes representation which can be used for
hashing for instance. It is not required that [to_bytes (Option.get
(of_bytes_opt t)) = t]. By default, little endian encoding is used, and
length of the resulting bytes may vary depending on the order.
*)
val to_bytes : t -> Bytes.t
end
(** Module type for the prime fields GF(p) *)
module type PRIME_FIELD = sig
include FIELD
(** Actual number of bytes allocated for a value of type t *)
val size_in_memory : int
(** [of_z x] builds an element t from the Zarith element [x]. [mod order] is
applied if [x >= order] or [x < 0]. *)
val of_z : Z.t -> t
(** [to_z x] builds a Zarith element, using the decimal representation.
Arithmetic on the result can be done using the modular functions on
integers *)
val to_z : t -> Z.t
end
module type CURVE = sig
(** The type of the element in the elliptic curve *)
type t
(** Actual number of bytes allocated for a value of type t *)
val size_in_memory : int
(** The size of a point representation, in bytes *)
val size_in_bytes : int
module Scalar : FIELD
(** Check if a point, represented as a byte array, is on the curve **)
val check_bytes : Bytes.t -> bool
(** Attempt to construct a point from a byte array *)
val of_bytes_opt : Bytes.t -> t option
(** Return a representation in bytes *)
val to_bytes : t -> Bytes.t
(** Zero of the elliptic curve *)
val zero : t
(** A fixed generator of the elliptic curve *)
val one : t
(** Return the addition of two element *)
val add : t -> t -> t
(** Double the element *)
val double : t -> t
(** Return the opposite of the element *)
val negate : t -> t
(** Return [true] if the two elements are algebraically the same *)
val eq : t -> t -> bool
(** Multiply an element by a scalar *)
val mul : t -> Scalar.t -> t
end
end
# 78 "v5.in.ml"
module Blake2B : sig
# 1 "v5/blake2B.mli"
(** Builds a new Hash type using Blake2B. *)
(** The parameters for creating a new Hash type using
{!Make_Blake2B}. Both {!name} and {!title} are only informative,
used in error messages and serializers. *)
module type Name = sig
val name : string
val title : string
val size : int option
end
module type PrefixedName = sig
include Name
val b58check_prefix : string
end
(** Builds a new Hash type using Blake2B. *)
module Make_minimal (Name : Name) : S.MINIMAL_HASH
module type Register = sig
val register_encoding :
prefix:string ->
length:int ->
to_raw:('a -> string) ->
of_raw:(string -> 'a option) ->
wrap:('a -> Base58.data) ->
'a Base58.encoding
end
module Make (Register : Register) (Name : PrefixedName) : S.HASH
end
# 80 "v5.in.ml"
module Bls12_381 : sig
# 1 "v5/bls12_381.mli"
module Fr : S.PRIME_FIELD
module G1 : S.CURVE with type Scalar.t = Fr.t
module G2 : S.CURVE with type Scalar.t = Fr.t
val pairing_check : (G1.t * G2.t) list -> bool
end
# 82 "v5.in.ml"
module Bls_signature : sig
# 1 "v5/bls_signature.mli"
(** Type of the public keys *)
type pk
(** The size in bytes of a serialized value [pk] *)
val pk_size_in_bytes : int
(** Build a value of type [pk] without performing any check on the input.
It is safe to use this function when verifying a signature as the
signature function verifies if the point is in the prime subgroup. Using
[unsafe_pk_of_bytes] removes a verification performed twice when used
[pk_of_bytes_exn] or [pk_of_bytes_opt].
The expected bytes format are the compressed form of a point on G1. *)
val unsafe_pk_of_bytes : Bytes.t -> pk
(** Build a value of type [pk] safely, i.e. the function checks the bytes
given in parameters represents a point on the curve and in the prime subgroup.
Return [None] if the bytes are not in the correct format or does
not represent a point in the prime subgroup.
The expected bytes format are the compressed form of a point on G1.
*)
val pk_of_bytes_opt : Bytes.t -> pk option
(** Returns a bytes representation of a value of type [pk]. The output is the
compressed form a the point G1.t the [pk] represents.
*)
val pk_to_bytes : pk -> Bytes.t
(** Type of the signatures *)
type signature
(** The size in bytes of a serialized value [signature] *)
val signature_size_in_bytes : int
(** Build a value of type {!signature} without performing any check on the
input. It is safe to use this function when verifying a signature as the
signature function verifies if the point is in the prime subgroup. Using
{!unsafe_signature_of_bytes} removes a verification performed twice when
using {!signature_of_bytes_exn} or {!signature_of_bytes_opt}.
The expected bytes format are the compressed form of a point on G2. *)
val unsafe_signature_of_bytes : Bytes.t -> signature
(** Build a value of type {!signature} safely, i.e. the function checks the
bytes given as argument represents a point on the curve and in the
prime subgroup. Return [None] if the bytes are not in the correct format
or do not represent a point in the prime subgroup.
The expected bytes format are the compressed form of a point on G2. *)
val signature_of_bytes_opt : Bytes.t -> signature option
(** Returns a bytes representation of a value of type [signature]. The
output is the compressed form of the {!G2.t} point the [signature]
represents. *)
val signature_to_bytes : signature -> Bytes.t
(** [aggregate_signature_opt signatures] aggregates the signatures [signatures], following
https://datatracker.ietf.org/doc/html/draft-irtf-cfrg-bls-signature-04#section-2.8.
Return [None] if [INVALID] is expected in the specification
*)
val aggregate_signature_opt : signature list -> signature option
val verify : pk -> Bytes.t -> signature -> bool
val aggregate_verify : (pk * Bytes.t) list -> signature -> bool
end
# 84 "v5.in.ml"
module Ed25519 : sig
# 1 "v5/ed25519.mli"
(** Tezos - Ed25519 cryptography *)
include S.SIGNATURE with type watermark := bytes
end
# 86 "v5.in.ml"
module Secp256k1 : sig
# 1 "v5/secp256k1.mli"
(** Tezos - Secp256k1 cryptography *)
include S.SIGNATURE with type watermark := bytes
end
# 88 "v5.in.ml"
module P256 : sig
# 1 "v5/p256.mli"
(** Tezos - P256 cryptography *)
include S.SIGNATURE with type watermark := bytes
end
# 90 "v5.in.ml"
module Chain_id : sig
# 1 "v5/chain_id.mli"
include S.HASH
end
# 92 "v5.in.ml"
module Signature : sig
# 1 "v5/signature.mli"
type public_key_hash =
| Ed25519 of Ed25519.Public_key_hash.t
| Secp256k1 of Secp256k1.Public_key_hash.t
| P256 of P256.Public_key_hash.t
type public_key =
| Ed25519 of Ed25519.Public_key.t
| Secp256k1 of Secp256k1.Public_key.t
| P256 of P256.Public_key.t
type watermark =
| Endorsement of Chain_id.t
| Generic_operation
| Custom of bytes
include
S.SIGNATURE
with type Public_key_hash.t = public_key_hash
and type Public_key.t = public_key
and type watermark := watermark
end
# 94 "v5.in.ml"
module Block_hash : sig
# 1 "v5/block_hash.mli"
(** Blocks hashes / IDs. *)
include S.HASH
end
# 96 "v5.in.ml"
module Operation_hash : sig
# 1 "v5/operation_hash.mli"
(** Operations hashes / IDs. *)
include S.HASH
end
# 98 "v5.in.ml"
module Operation_list_hash : sig
# 1 "v5/operation_list_hash.mli"
(** Blocks hashes / IDs. *)
include S.MERKLE_TREE with type elt = Operation_hash.t
end
# 100 "v5.in.ml"
module Operation_list_list_hash : sig
# 1 "v5/operation_list_list_hash.mli"
(** Blocks hashes / IDs. *)
include S.MERKLE_TREE with type elt = Operation_list_hash.t
end
# 102 "v5.in.ml"
module Protocol_hash : sig
# 1 "v5/protocol_hash.mli"
(** Protocol hashes / IDs. *)
include S.HASH
end
# 104 "v5.in.ml"
module Context_hash : sig
# 1 "v5/context_hash.mli"
(** Committed context hashes / IDs. *)
include S.HASH
(** The module for representing the hash version of a context *)
module Version : sig
(** The type for hash versions. *)
type t = private int
include Compare.S with type t := t
(** [pp] is the pretty-printer for hash versions. *)
val pp : Format.formatter -> t -> unit
(** [encoding] is the data encoding for hash versions. *)
val encoding : t Data_encoding.t
(** [of_int i] is the hash version equivalent to [i].
This function raises [Invalid_argument] if [i] is not an unsigned 16-bit integer. *)
val of_int : int -> t
end
type version = Version.t
end
# 106 "v5.in.ml"
module Sapling : sig
# 1 "v5/sapling.mli"
module Ciphertext : sig
type t
val encoding : t Data_encoding.t
val get_memo_size : t -> int
end
module Commitment : sig
type t
val encoding : t Data_encoding.t
val valid_position : int64 -> bool
end
module CV : sig
type t
val encoding : t Data_encoding.t
end
module Hash : sig
type t
val compare : t -> t -> int
val encoding : t Data_encoding.t
val to_bytes : t -> Bytes.t
val of_bytes_exn : Bytes.t -> t
val uncommitted : height:int -> t
val merkle_hash : height:int -> t -> t -> t
val of_commitment : Commitment.t -> t
val to_commitment : t -> Commitment.t
end
module Nullifier : sig
type t
val encoding : t Data_encoding.t
val compare : t -> t -> int
end
module UTXO : sig
type rk
type spend_proof
type spend_sig
type output_proof
type input = {
cv : CV.t;
nf : Nullifier.t;
rk : rk;
proof_i : spend_proof;
signature : spend_sig;
}
val input_encoding : input Data_encoding.t
type output = {
cm : Commitment.t;
proof_o : output_proof;
ciphertext : Ciphertext.t;
}
val output_encoding : output Data_encoding.t
type binding_sig
type transaction = {
inputs : input list;
outputs : output list;
binding_sig : binding_sig;
balance : Int64.t;
root : Hash.t;
bound_data : string;
}
val transaction_encoding : transaction Data_encoding.t
val binding_sig_encoding : binding_sig Data_encoding.t
module Legacy : sig
type transaction_new = transaction
type transaction = {
inputs : input list;
outputs : output list;
binding_sig : binding_sig;
balance : Int64.t;
root : Hash.t;
}
val transaction_encoding : transaction Data_encoding.t
val cast : transaction -> transaction_new
end
end
module Verification : sig
type t
val with_verification_ctx : (t -> 'a) -> 'a
val check_spend : t -> UTXO.input -> Hash.t -> string -> bool
val check_output : t -> UTXO.output -> bool
val final_check : t -> UTXO.transaction -> string -> bool
end
end
# 108 "v5.in.ml"
module Timelock : sig
# 1 "v5/timelock.mli"
(** Contains a value (the decryption of the ciphertext) that can be provably
recovered in [time] sequential operation or with the rsa secret. *)
type chest
val chest_encoding : chest Data_encoding.t
(** Provably opens a chest in a short time. *)
type chest_key
val chest_key_encoding : chest_key Data_encoding.t
(** Result of the opening of a chest.
The opening can fail in two way which we distinguish to blame the right person.
One can provide a false unlocked_value or unlocked_proof, in which case
we return [Bogus_opening] and the provider of the chest key is at fault.
Otherwise, one can lock the wrong key or put garbage in the ciphertext in which case
we return [Bogus_cipher] and the provider of the chest is at fault.
Otherwise we return [Correct payload] where payload was what had
originally been put in the chest. *)
type opening_result = Correct of Bytes.t | Bogus_cipher | Bogus_opening
(** Takes a chest, chest key and time and tries to recover the underlying
plaintext. See the documentation of opening_result. *)
val open_chest : chest -> chest_key -> time:int -> opening_result
(** Gives the size of the underlying plaintext in a chest in bytes.
Used for gas accounting*)
val get_plaintext_size : chest -> int
end
# 110 "v5.in.ml"
module Micheline : sig
# 1 "v5/micheline.mli"
type annot = string list
type ('l, 'p) node =
| Int of 'l * Z.t
| String of 'l * string
| Bytes of 'l * bytes
| Prim of 'l * 'p * ('l, 'p) node list * annot
| Seq of 'l * ('l, 'p) node list
type 'p canonical
type canonical_location
val dummy_location : canonical_location
val root : 'p canonical -> (canonical_location, 'p) node
val canonical_location_encoding : canonical_location Data_encoding.encoding
val canonical_encoding :
variant:string ->
'l Data_encoding.encoding ->
'l canonical Data_encoding.encoding
val location : ('l, 'p) node -> 'l
val annotations : ('l, 'p) node -> string list
val strip_locations : (_, 'p) node -> 'p canonical
end
# 112 "v5.in.ml"
# 114 "v5.in.ml"
module Bounded : sig
# 1 "v5/bounded.mli"
(** This module implements bounded (or refined) versions of data types. *)
(** Bounded [int32]. *)
module Int32 : sig
(** Bounds.
Formally each [B : BOUND] represents the interval of all integers
between [B.min_int] and [B.max_int]. This is a closed interval, e.g.
the endpoints are included.
Intervals can be empty, for example [struct let min_int = 1; let max_int
0 end] is empty.
*)
module type BOUNDS = sig
val min_int : int32
val max_int : int32
end
module type S = sig
type t
include BOUNDS
include Compare.S with type t := t
val encoding : t Data_encoding.t
val to_int32 : t -> int32
val of_int32 : int32 -> t option
end
(** Produce a module [_ : S] of bounded integers.
If the given interval is empty, [S.t] is the empty type, and [of_int32]
returns [Error] for all inputs.
{4 Encoding}
[(Make B).encoding] is based on the underlying [int32] encoding. This
allow future compatiblity with larger bounds, at the price of addding 1-3
redundant bytes to each message.
*)
module Make (_ : BOUNDS) : S
end
end
# 116 "v5.in.ml"
module Fitness : sig
# 1 "v5/fitness.mli"
(** The fitness of a block is defined as a list of bytes,
compared in a lexicographical order (longer list are greater). *)
include S.T with type t = bytes list
end
# 118 "v5.in.ml"
module Operation : sig
# 1 "v5/operation.mli"
(** Tezos operations. *)
type t = {shell : shell_header; proto : bytes}
include S.HASHABLE with type t := t and type hash := Operation_hash.t
end
# 120 "v5.in.ml"
module Context : sig
# 1 "v5/context.mli"
(** View over the context store, restricted to types, access and
functional manipulation of an existing context. *)
(** The tree depth of a fold. See the [fold] function for more information. *)
type depth = [`Eq of int | `Le of int | `Lt of int | `Ge of int | `Gt of int]
(** The type for context configuration. *)
type config
(** The equality function for context configurations. If two context have the
same configuration, they will generate the same context hashes. *)
val equal_config : config -> config -> bool
module type VIEW = sig
(** The type for context views. *)
type t
(** The type for context keys. *)
type key
(** The type for context values. *)
type value
(** The type for context trees. *)
type tree
(** {2 Getters} *)
(** [mem t k] is an Lwt promise that resolves to [true] iff [k] is bound
to a value in [t]. *)
val mem : t -> key -> bool Lwt.t
(** [mem_tree t k] is like {!mem} but for trees. *)
val mem_tree : t -> key -> bool Lwt.t
(** [find t k] is an Lwt promise that resolves to [Some v] if [k] is
bound to the value [v] in [t] and [None] otherwise. *)
val find : t -> key -> value option Lwt.t
(** [find_tree t k] is like {!find} but for trees. *)
val find_tree : t -> key -> tree option Lwt.t
(** [list t key] is the list of files and sub-nodes stored under [k] in [t].
The result order is not specified but is stable.
[offset] and [length] are used for pagination. *)
val list :
t -> ?offset:int -> ?length:int -> key -> (string * tree) list Lwt.t
(** [length t key] is an Lwt promise that resolves to the number of
files and sub-nodes stored under [k] in [t].
It is equivalent to [list t k >|= List.length] but has a
constant-time complexity. *)
val length : t -> key -> int Lwt.t
(** {2 Setters} *)
(** [add t k v] is an Lwt promise that resolves to [c] such that:
- [k] is bound to [v] in [c];
- and [c] is similar to [t] otherwise.
If [k] was already bound in [t] to a value that is physically equal
to [v], the result of the function is a promise that resolves to
[t]. Otherwise, the previous binding of [k] in [t] disappears. *)
val add : t -> key -> value -> t Lwt.t
(** [add_tree] is like {!add} but for trees. *)
val add_tree : t -> key -> tree -> t Lwt.t
(** [remove t k v] is an Lwt promise that resolves to [c] such that:
- [k] is unbound in [c];
- and [c] is similar to [t] otherwise. *)
val remove : t -> key -> t Lwt.t
(** {2 Folding} *)
(** [fold ?depth t root ~order ~init ~f] recursively folds over the trees
and values of [t]. The [f] callbacks are called with a key relative
to [root]. [f] is never called with an empty key for values; i.e.,
folding over a value is a no-op.
The depth is 0-indexed. If [depth] is set (by default it is not), then [f]
is only called when the conditions described by the parameter is true:
- [Eq d] folds over nodes and values of depth exactly [d].
- [Lt d] folds over nodes and values of depth strictly less than [d].
- [Le d] folds over nodes and values of depth less than or equal to [d].
- [Gt d] folds over nodes and values of depth strictly more than [d].
- [Ge d] folds over nodes and values of depth more than or equal to [d].
If [order] is [`Sorted] (the default), the elements are traversed in
lexicographic order of their keys. For large nodes, it is memory-consuming,
use [`Undefined] for a more memory efficient [fold]. *)
val fold :
?depth:depth ->
t ->
key ->
order:[`Sorted | `Undefined] ->
init:'a ->
f:(key -> tree -> 'a -> 'a Lwt.t) ->
'a Lwt.t
(** {2 Configuration} *)
(** [config t] is [t]'s hash configuration. *)
val config : t -> config
end
module Kind : sig
type t = [`Value | `Tree]
end
module type TREE = sig
(** [Tree] provides immutable, in-memory partial mirror of the
context, with lazy reads and delayed writes. The trees are Merkle
trees that carry the same hash as the part of the context they
mirror.
Trees are immutable and non-persistent (they disappear if the
host crash), held in memory for efficiency, where reads are done
lazily and writes are done only when needed, e.g. on
[Context.commit]. If a key is modified twice, only the last
value will be written to disk on commit. *)
(** The type for context views. *)
type t
(** The type for context trees. *)
type tree
include VIEW with type t := tree and type tree := tree
(** [empty _] is the empty tree. *)
val empty : t -> tree
(** [is_empty t] is true iff [t] is [empty _]. *)
val is_empty : tree -> bool
(** [kind t] is [t]'s kind. It's either a tree node or a leaf
value. *)
val kind : tree -> Kind.t
(** [to_value t] is an Lwt promise that resolves to [Some v] if [t]
is a leaf tree and [None] otherwise. It is equivalent to [find t
[]]. *)
val to_value : tree -> value option Lwt.t
(** [of_value _ v] is an Lwt promise that resolves to the leaf tree
[v]. Is is equivalent to [add (empty _) [] v]. *)
val of_value : t -> value -> tree Lwt.t
(** [hash t] is [t]'s Merkle hash. *)
val hash : tree -> Context_hash.t
(** [equal x y] is true iff [x] and [y] have the same Merkle hash. *)
val equal : tree -> tree -> bool
(** {2 Caches} *)
(** [clear ?depth t] clears all caches in the tree [t] for subtrees with a
depth higher than [depth]. If [depth] is not set, all of the subtrees are
cleared. *)
val clear : ?depth:int -> tree -> unit
end
module Proof : sig
(** Proofs are compact representations of trees which can be shared
between peers.
This is expected to be used as follows:
- A first peer runs a function [f] over a tree [t]. While performing
this computation, it records: the hash of [t] (called [before]
below), the hash of [f t] (called [after] below) and a subset of [t]
which is needed to replay [f] without any access to the first peer's
storage. Once done, all these informations are packed into a proof of
type [t] that is sent to the second peer.
- The second peer generates an initial tree [t'] from [p] and computes
[f t']. Once done, it compares [t']'s hash and [f t']'s hash to [before]
and [after]. If they match, they know that the result state [f t'] is a
valid context state, without having to have access to the full storage
of the first peer. *)
(** The type for file and directory names. *)
type step = string
(** The type for values. *)
type value = bytes
(** The type of indices for inodes' children. *)
type index = int
(** The type for hashes. *)
type hash = Context_hash.t
(** The type for (internal) inode proofs.
These proofs encode large directories into a tree-like structure. This
reflects irmin-pack's way of representing nodes and computing
hashes (tree-like representations for nodes scales better than flat
representations).
[length] is the total number of entries in the children of the inode.
It's the size of the "flattened" version of that inode. [length] can be
used to prove the correctness of operations such [Tree.length] and
[Tree.list ~offset ~length] in an efficient way.
In proofs with [version.is_binary = false], an inode at depth 0 has a
[length] of at least [257]. Below that threshold a [Node] tag is used in
[tree]. That threshold is [3] when [version.is_binary = true].
[proofs] contains the children proofs. It is a sparse list of ['a] values.
These values are associated to their index in the list, and the list is
kept sorted in increasing order of indices. ['a] can be a concrete proof
or a hash of that proof.
In proofs with [version.is_binary = true], inodes have at most 2 proofs
(indexed 0 or 1).
In proofs with [version.is_binary = false], inodes have at most 32 proofs
(indexed from 0 to 31). *)
type 'a inode = {length : int; proofs : (index * 'a) list}
(** The type for inode extenders.
An extender is a compact representation of a sequence of [inode] which
contain only one child. As for inodes, The ['a] parameter can be a
concrete proof or a hash of that proof.
If an inode proof contains singleton children [i_0, ..., i_n] such as:
[{length=l; proofs = [ (i_0, {proofs = ... { proofs = [ (i_n, p) ] }})]}],
then it is compressed into the inode extender
[{length=l; segment = [i_0;..;i_n]; proof=p}] sharing the same lenght [l]
and final proof [p]. *)
type 'a inode_extender = {length : int; segment : index list; proof : 'a}
(** The type for compressed and partial Merkle tree proofs.
Tree proofs do not provide any guarantee with the ordering of
computations. For instance, if two effects commute, they won't be
distinguishable by this kind of proofs.
[Value v] proves that a value [v] exists in the store.
[Blinded_value h] proves a value with hash [h] exists in the store.
[Node ls] proves that a a "flat" node containing the list of files [ls]
exists in the store.
In proofs with [version.is_binary = true], the length of [ls] is at most
2.
In proofs with [version.is_binary = false], the length of [ls] is at most
256.
[Blinded_node h] proves that a node with hash [h] exists in the store.
[Inode i] proves that an inode [i] exists in the store.
[Extender e] proves that an inode extender [e] exist in the store. *)
type tree =
| Value of value
| Blinded_value of hash
| Node of (step * tree) list
| Blinded_node of hash
| Inode of inode_tree inode
| Extender of inode_tree inode_extender
(** The type for inode trees. It is a subset of [tree], limited to nodes.
[Blinded_inode h] proves that an inode with hash [h] exists in the store.
[Inode_values ls] is simliar to trees' [Node].
[Inode_tree i] is similar to tree's [Inode].
[Inode_extender e] is similar to trees' [Extender]. *)
and inode_tree =
| Blinded_inode of hash
| Inode_values of (step * tree) list
| Inode_tree of inode_tree inode
| Inode_extender of inode_tree inode_extender
(** The type for kinded hashes. *)
type kinded_hash = [`Value of hash | `Node of hash]
module Stream : sig
(** Stream proofs represent an explicit traversal of a Merle tree proof.
Every element (a node, a value, or a shallow pointer) met is first
"compressed" by shallowing its children and then recorded in the proof.
As stream proofs directly encode the recursive construction of the
Merkle root hash is slightly simpler to implement: verifier simply
need to hash the compressed elements lazily, without any memory or
choice.
Moreover, the minimality of stream proofs is trivial to check.
Once the computation has consumed the compressed elements required,
it is sufficient to check that no more compressed elements remain
in the proof.
However, as the compressed elements contain all the hashes of their
shallow children, the size of stream proofs is larger
(at least double in size in practice) than tree proofs, which only
contains the hash for intermediate shallow pointers. *)
(** The type for elements of stream proofs.
[Value v] is a proof that the next element read in the store is the
value [v].
[Node n] is a proof that the next element read in the store is the
node [n].
[Inode i] is a proof that the next element read in the store is the
inode [i].
[Inode_extender e] is a proof that the next element read in the store
is the node extender [e]. *)
type elt =
| Value of value
| Node of (step * kinded_hash) list
| Inode of hash inode
| Inode_extender of hash inode_extender
(** The type for stream proofs.
The sequance [e_1 ... e_n] proves that the [e_1], ..., [e_n] are
read in the store in sequence. *)
type t = elt Seq.t
end
type stream = Stream.t
(** The type for proofs of kind ['a].
A proof [p] proves that the state advanced from [before p] to
[after p]. [state p]'s hash is [before p], and [state p] contains
the minimal information for the computation to reach [after p].
[version p] is the proof version, it packs several informations.
[is_stream] discriminates between the stream proofs and the tree proofs.
[is_binary] discriminates between proofs emitted from
[Tezos_context(_memory).Context_binary] and
[Tezos_context(_memory).Context].
It will also help discriminate between the data encoding techniques used.
The version is meant to be decoded and encoded using the
{!Tezos_context_helpers.Context.decode_proof_version} and
{!Tezos_context_helpers.Context.encode_proof_version}. *)
type 'a t = {
version : int;
before : kinded_hash;
after : kinded_hash;
state : 'a;
}
end
include VIEW with type key = string list and type value = bytes
module Tree :
TREE
with type t := t
and type key := key
and type value := value
and type tree := tree
(** [verify p f] runs [f] in checking mode. [f] is a function that takes a
tree as input and returns a new version of the tree and a result. [p] is a
proof, that is a minimal representation of the tree that contains what [f]
should be expecting.
Therefore, contrary to trees found in a storage, the contents of the trees
passed to [f] may not be available. For this reason, looking up a value at
some [path] can now produce three distinct outcomes:
- A value [v] is present in the proof [p] and returned : [find tree path]
is a promise returning [Some v];
- [path] is known to have no value in [tree] : [find tree path] is a
promise returning [None]; and
- [path] is known to have a value in [tree] but [p] does not provide it
because [f] should not need it: [verify] returns an error classifying
[path] as an invalid path (see below).
The same semantics apply to all operations on the tree [t] passed to [f]
and on all operations on the trees built from [f].
The generated tree is the tree after [f] has completed. That tree is
disconnected from any storage (i.e. [index]). It is possible to run
operations on it as long as they don't require loading shallowed subtrees.
The result is [Error (`Msg _)] if the proof is rejected:
- For tree proofs: when [p.before] is different from the hash of
[p.state];
- For tree and stream proofs: when [p.after] is different from the hash
of [f p.state];
- For tree proofs: when [f p.state] tries to access invalid paths in
[p.state];
- For stream proofs: when the proof is not consumed in the exact same
order it was produced;
- For stream proofs: when the proof is too short or not empty once [f] is
done.
@raise Failure if the proof version is invalid or incompatible with the
verifier. *)
type ('proof, 'result) verifier :=
'proof ->
(tree -> (tree * 'result) Lwt.t) ->
( tree * 'result,
[ `Proof_mismatch of string
| `Stream_too_long of string
| `Stream_too_short of string ] )
result
Lwt.t
(** The type for tree proofs.
Guarantee that the given computation performs exactly the same state
operations as the generating computation, *in some order*. *)
type tree_proof := Proof.tree Proof.t
(** [verify_tree_proof] is the verifier of tree proofs. *)
val verify_tree_proof : (tree_proof, 'a) verifier
(** The type for stream proofs.
Guarantee that the given computation performs exactly the same state
operations as the generating computation, in the exact same order. *)
type stream_proof := Proof.stream Proof.t
(** [verify_stream] is the verifier of stream proofs. *)
val verify_stream_proof : (stream_proof, 'a) verifier
module type PROOF_ENCODING = sig
val tree_proof_encoding : tree_proof Data_encoding.t
val stream_proof_encoding : stream_proof Data_encoding.t
end
(** Proof encoding for binary tree Merkle proofs *)
module Proof_encoding : sig
(** V1: using vanilla Data_encoding. Easier to parse by non-OCaml programs
but less efficient *)
module V1 : sig
(** Encoding for 32-tree proofs *)
module Tree32 : PROOF_ENCODING
(** Encoding for binary tree proofs *)
module Tree2 : PROOF_ENCODING
end
(** V2 : using Compact_encoding. Smaller than V1 but more complex parser
is required. *)
module V2 : sig
(** Encoding for 32-tree proofs *)
module Tree32 : PROOF_ENCODING
(** Encoding for binary tree proofs *)
module Tree2 : PROOF_ENCODING
end
end
val complete : t -> string -> string list Lwt.t
(** Get the hash version used for the context *)
val get_hash_version : t -> Context_hash.Version.t
(** Set the hash version used for the context. It may recalculate the hashes
of the whole context, which can be a long process.
Returns an Error if the hash version is unsupported. *)
val set_hash_version :
t -> Context_hash.Version.t -> t Error_monad.shell_tzresult Lwt.t
type cache_key
type cache_value = ..
module type CACHE = sig
(** Type for context view. A context contains a cache. A cache is
made of subcaches. Each subcache has its own size limit. The
limit of its subcache is called a layout and can be initialized
via the [set_cache_layout] function. *)
type t
(** Size for subcaches and values of the cache. Units are not
specified and left to the economic protocol. *)
type size
(** Index type to index caches. *)
type index
(** Identifier type for keys. *)
type identifier
(** A key uniquely identifies a cached [value] in some subcache. *)
type key
(** Cached values inhabit an extensible type. *)
type value = ..
(** [key_of_identifier ~cache_index identifier] builds a key from the
[cache_index] and the [identifier].
No check are made to ensure the validity of the index. *)
val key_of_identifier : cache_index:index -> identifier -> key
(** [identifier_of_key key] returns the identifier associated to the
[key]. *)
val identifier_of_key : key -> identifier
(** [pp fmt cache] is a pretty printter for a [cache]. *)
val pp : Format.formatter -> t -> unit
(** [find ctxt k = Some v] if [v] is the value associated to [k] in
in the cache where [k] is. Returns [None] if there is no such
value in the cache of [k]. This function is in the Lwt monad
because if the value has not been constructed, it is constructed
on the fly. *)
val find : t -> key -> value option Lwt.t
(** [set_cache_layout ctxt layout] sets the caches of [ctxt] to
comply with given [layout]. If there was already a cache in
[ctxt], it is erased by the new layout.
Otherwise, a fresh collection of empty caches is reconstructed
from the new [layout]. Notice that cache [key]s are invalidated
in that case, i.e., [get t k] will return [None]. *)
val set_cache_layout : t -> size list -> t Lwt.t
(** [update ctxt k (Some (e, size))] returns a cache where the value
[e] of [size] is associated to key [k]. If [k] is already in the
cache, the cache entry is updated.
[update ctxt k None] removes [k] from the cache. *)
val update : t -> key -> (value * size) option -> t
(** [sync ctxt ~cache_nonce] updates the context with the domain of
the cache computed so far. Such function is expected to be called
at the end of the validation of a block, when there is no more
accesses to the cache.
[cache_nonce] identifies the block that introduced new cache
entries. The nonce should identify uniquely the block which
modifies this value. It cannot be the block hash for circularity
reasons: The value of the nonce is stored onto the context and
consequently influences the context hash of the very same
block. Such nonce cannot be determined by the shell and its
computation is delegated to the economic protocol.
*)
val sync : t -> cache_nonce:Bytes.t -> t Lwt.t
(** [clear ctxt] removes all cache entries. *)
val clear : t -> t
(** {3 Cache introspection} *)
(** [list_keys ctxt ~cache_index] returns the list of cached keys in
cache numbered [cache_index] along with their respective
[size]. The returned list is sorted in terms of their age in the
cache, the oldest coming first. If [cache_index] is invalid,
then this function returns [None]. *)
val list_keys : t -> cache_index:index -> (key * size) list option
(** [key_rank index ctxt key] returns the number of cached value older
than the given [key]; or, [None] if the [key] is not a cache key. *)
val key_rank : t -> key -> int option
(** {3 Cache helpers for RPCs} *)
(** [future_cache_expectation ctxt ~time_in_blocks] returns [ctxt] except
that the entries of the caches that are presumably too old to
still be in the caches in [n_blocks] are removed.
This function is based on a heuristic. The context maintains
the median of the number of removed entries: this number is
multipled by `n_blocks` to determine the entries that are
likely to be removed in `n_blocks`. *)
val future_cache_expectation : t -> time_in_blocks:int -> t
(** [cache_size ctxt ~cache_index] returns an overapproximation of
the size of the cache. Returns [None] if [cache_index] is not a
valid cache index. *)
val cache_size : t -> cache_index:index -> size option
(** [cache_size_limit ctxt ~cache_index] returns the maximal size of
the cache indexed by [cache_index]. Returns [None] if
[cache_index] is not a valid cache index. *)
val cache_size_limit : t -> cache_index:index -> size option
end
module Cache :
CACHE
with type t := t
and type size := int
and type index := int
and type identifier := string
and type key = cache_key
and type value = cache_value
end
# 122 "v5.in.ml"
module Updater : sig
# 1 "v5/updater.mli"
(** Tezos Protocol Environment - Protocol updater. *)
(** Validation result: the record returned by the protocol
on the successful validation of a block. *)
type validation_result = {
context : Context.t;
(** The resulting context, it will be used for the next block. *)
fitness : Fitness.t;
(** The effective fitness of the block (to be compared with the one
'announced' in the block header). *)
message : string option;
(** An optional informative message, akin to a 'git commit' message,
which can be attached to the [context] when it's being commited. *)
max_operations_ttl : int;
(** The "time-to-live" of operations for the next block: any
operation whose 'branch' is older than 'ttl' blocks in the past
cannot be included in the next block. *)
last_allowed_fork_level : Int32.t;
(** The level of the last block for which the node might consider an
alternate branch. The shell should consider as invalid any branch
whose fork point is older (has a lower level) than the
given value. *)
}
type quota = {
max_size : int;
(** The maximum size (in bytes) of the serialized list of
operations. *)
max_op : int option;
(** The maximum number of operations in a block.
[None] means no limit. *)
}
type rpc_context = {
block_hash : Block_hash.t;
block_header : Block_header.shell_header;
context : Context.t;
}
(** This is the signature of a Tezos protocol implementation. It has
access to the standard library and the Environment module. *)
module type PROTOCOL = sig
(** The maximum size of a block header in bytes. *)
val max_block_length : int
(** The maximum size of an {!operation} in bytes. This value is bigger than the size
of the bytes required for {!operation_data}, because this value accounts
for the shell header. *)
val max_operation_data_length : int
(** Operations quota for each validation pass. The length of the
list denotes the number of validation passes. *)
val validation_passes : quota list
(** The economic protocol-specific type of blocks. *)
(** Encoding for economic protocol-specific part of block headers. *)
(** A fully parsed block header. *)
(** Economic protocol-specific side information computed by the
protocol during the validation of a block. Should not include
information about the evaluation of operations which is handled
separately by {!operation_metadata}. To be used as an execution
trace by tools (client, indexer). Not necessary for
validation. *)
(** Encoding for economic protocol-specific block metadata. *)
(** The economic protocol-specific type of operations. *)
type operation_data
(** Economic protocol-specific side information computed by the
protocol during the validation of each operation, to be used
conjointly with {!block_header_metadata}. *)
type operation_receipt
(** A fully parsed operation. *)
type operation = {
shell : Operation.shell_header;
protocol_data : operation_data;
}
(** Encoding for economoic protocol-specific operation data. *)
val operation_data_encoding : operation_data Data_encoding.t
(** Encoding for eonomic protocol-specific operation receipts. *)
val operation_receipt_encoding : operation_receipt Data_encoding.t
(** Encoding that mixes an operation data and its receipt. *)
val operation_data_and_receipt_encoding :
(operation_data * operation_receipt) Data_encoding.t
(** [acceptable_passes op] lists the validation passes in which the
input operation [op] can appear. For instance, it results in
[[0]] if [op] only belongs to the first pass. An answer of [[]]
means that the [op] is ill-formed and cannot be included at
all in a block. *)
val acceptable_passes : operation -> int list
(** [relative_position_within_block op1 op2] provides a partial and
strict order of operations within a block. It is intended to be
used as an argument to {!List.sort} (and other sorting/ordering
functions) to arrange a set of operations into a sequence, the
order of which is valid for the protocol.
A negative (respectively, positive) results means that [op1]
should appear before (and, respectively, after) [op2] in a
block. This function does not provide a total ordering on the
operations: a result of [0] entails that the protocol does not
impose any preferences to the order in which [op1] and [op2]
should be included in a block.
{b Caveat Emptor!} [relative_position_within_block o1 o2 = 0]
does NOT imply that [o1] is equal to [o2] in any way.
Consequently, it {e MUST NOT} be used as a [compare] component of
an {!Stdlib.Map.OrderedType}, or any such collection which relies
on a total comparison function. *)
val relative_position_within_block : operation -> operation -> int
(** A functional state that is transmitted through the steps of a
block validation sequence: it can be created by any of the
[begin_x] functions below, and its final value is produced by
{!finalize_block}. It must retain the current state of the store,
and it can also contain additional information that must be
remembered during the validation process. Said extra content must
however be immutable: validator or baker implementations are
allowed to pause, replay or backtrack throughout validation
steps. *)
type validation_state
(** [begin_partial_application cid ctxt] checks that a block is
well-formed in a given context. This function should run quickly,
as its main use is to reject bad blocks from the chain as early
as possible. The input [ancestor_context] is expected to result
from the application of an ancestor block of the current head
with the same economic protocol. Said ancestor block is also
required to be more recent (i.e., it has a greater level), than
the current head's "last_allowed_fork_level".
The resulting `validation_state` will be used for multi-pass
validation. *)
val begin_partial_application :
chain_id:Chain_id.t ->
ancestor_context:Context.t ->
predecessor_timestamp:Time.t ->
predecessor_fitness:Fitness.t ->
block_header ->
validation_state tzresult Lwt.t
(** [begin_application chain_id ... bh] defines the first step in a
block validation sequence. It initializes a validation context
for validating a block, whose header is [bh]. *)
val begin_application :
chain_id:Chain_id.t ->
predecessor_context:Context.t ->
predecessor_timestamp:Time.t ->
predecessor_fitness:Fitness.t ->
block_header ->
validation_state tzresult Lwt.t
(** [begin_construction] initializes a validation context for
constructing a new block, as opposed to validating an existing
block.
This function can be used in two modes: with and without the
optional [protocol_data] argument. With the latter, it is used by
bakers to start the process for baking a new block. Without it,
is used by the Shell's prevalidator to construct a virtual block,
which carries the contents of the pre-applied operations of the
mempool.
When [protocol_data] is provided, it is not expected to be the
final value of the field of the same name in the {!type-block_header}
of the block eventually being baked. Instead, it is expected to
construct a protocol-specific, good enough, "prototype" of its
final value. For instance, if the economic protocol specifies
that its block headers include a signature, [protocol_data] must
include a (faked) signature.
Moreover, these prototypes should not be distinguishable after
the application of [begin_construction]: the function must
produce the exact same context regardless of being passed a
prototype, or an "equivalent-but-complete" header. *)
val begin_construction :
chain_id:Chain_id.t ->
predecessor_context:Context.t ->
predecessor_timestamp:Time.t ->
predecessor_level:Int32.t ->
predecessor_fitness:Fitness.t ->
predecessor:Block_hash.t ->
timestamp:Time.t ->
?protocol_data:block_header_data ->
unit ->
validation_state tzresult Lwt.t
(** [apply_operation vs op] applies the input operation [op] on top
of the given {!validation_state} [vs]. It must be called after
{!begin_application} or {!begin_construction}, and before
{!finalize_block}, for each operation in a block. On a successful
application, it returns a pair consisting of the resulting
[validation_state], and the corresponding [operation_receipt]. *)
val apply_operation :
validation_state ->
operation ->
(validation_state * operation_receipt) tzresult Lwt.t
(** [finalize_block vs] finalizes the context resulting from the
application of the contents of the block being validated.
If there is no protocol migration, i.e., if the block being
applied is not the last block of the current economic protocol, the
resulting context can be used in the future as input for the
validation of its successor blocks. *)
val finalize_block :
validation_state ->
Block_header.shell_header option ->
(validation_result * block_header_metadata) tzresult Lwt.t
(** [rpc_services] provides the list of remote procedures exported
by this protocol implementation. *)
val rpc_services : rpc_context RPC_directory.t
(** [init ctxt hd] initializes the context, or upgrades the context
after a protocol amendment. This function receives as arguments
the context [ctxt] resulting from the application of the block
that triggered the amendment, as well as its header [hd]. This
function should fail if the "protocol stitching", i.e., the
transition from a valid previous protocol to the one being
activated, has not been implemented. *)
val init :
Context.t -> Block_header.shell_header -> validation_result tzresult Lwt.t
(** [value_of_key chain_id predecessor_context
predecessor_timestamp predecessor_level predecessor_fitness
predecessor timestamp] returns a function to build one value of
the cache from its key.
This function is used to restore all or part of the cache, for
instance when booting a validator to preheat the cache, or when a
reorganization happens. This function should never fail, returned
errors are fatal.
The generated function is passed to [Context.Cache.load_caches]
which will use it either immediately a cache-loading time or
on-demand, when a given cached value is accessed. *)
val value_of_key :
chain_id:Chain_id.t ->
predecessor_context:Context.t ->
predecessor_timestamp:Time.t ->
predecessor_level:Int32.t ->
predecessor_fitness:Fitness.t ->
predecessor:Block_hash.t ->
timestamp:Time.t ->
(Context.Cache.key -> Context.Cache.value tzresult Lwt.t) tzresult Lwt.t
end
(** [activate ctxt ph] activates an economic protocol (given by its
hash [ph]) from the context [ctxt]. The resulting context is still
a context for the current economic protocol, and the migration is
not complete until [init] in invoked. *)
val activate : Context.t -> Protocol_hash.t -> Context.t Lwt.t
end
# 124 "v5.in.ml"
module RPC_context : sig
# 1 "v5/RPC_context.mli"
type t = Updater.rpc_context
class type ['pr] simple =
object
method call_proto_service0 :
'm 'q 'i 'o.
(([< RPC_service.meth] as 'm), t, t, 'q, 'i, 'o) RPC_service.t ->
'pr ->
'q ->
'i ->
'o Error_monad.shell_tzresult Lwt.t
method call_proto_service1 :
'm 'a 'q 'i 'o.
(([< RPC_service.meth] as 'm), t, t * 'a, 'q, 'i, 'o) RPC_service.t ->
'pr ->
'a ->
'q ->
'i ->
'o Error_monad.shell_tzresult Lwt.t
method call_proto_service2 :
'm 'a 'b 'q 'i 'o.
(([< RPC_service.meth] as 'm), t, (t * 'a) * 'b, 'q, 'i, 'o) RPC_service.t ->
'pr ->
'a ->
'b ->
'q ->
'i ->
'o Error_monad.shell_tzresult Lwt.t
method call_proto_service3 :
'm 'a 'b 'c 'q 'i 'o.
( ([< RPC_service.meth] as 'm),
t,
((t * 'a) * 'b) * 'c,
'q,
'i,
'o )
RPC_service.t ->
'pr ->
'a ->
'b ->
'c ->
'q ->
'i ->
'o Error_monad.shell_tzresult Lwt.t
end
val make_call0 :
([< RPC_service.meth], t, t, 'q, 'i, 'o) RPC_service.t ->
'pr #simple ->
'pr ->
'q ->
'i ->
'o shell_tzresult Lwt.t
val make_call1 :
([< RPC_service.meth], t, t * 'a, 'q, 'i, 'o) RPC_service.t ->
'pr #simple ->
'pr ->
'a ->
'q ->
'i ->
'o shell_tzresult Lwt.t
val make_call2 :
([< RPC_service.meth], t, (t * 'a) * 'b, 'q, 'i, 'o) RPC_service.t ->
'pr #simple ->
'pr ->
'a ->
'b ->
'q ->
'i ->
'o shell_tzresult Lwt.t
val make_call3 :
([< RPC_service.meth], t, ((t * 'a) * 'b) * 'c, 'q, 'i, 'o) RPC_service.t ->
'pr #simple ->
'pr ->
'a ->
'b ->
'c ->
'q ->
'i ->
'o shell_tzresult Lwt.t
val make_opt_call0 :
([< RPC_service.meth], t, t, 'q, 'i, 'o) RPC_service.t ->
'pr #simple ->
'pr ->
'q ->
'i ->
'o option shell_tzresult Lwt.t
val make_opt_call1 :
([< RPC_service.meth], t, t * 'a, 'q, 'i, 'o) RPC_service.t ->
'pr #simple ->
'pr ->
'a ->
'q ->
'i ->
'o option shell_tzresult Lwt.t
val make_opt_call2 :
([< RPC_service.meth], t, (t * 'a) * 'b, 'q, 'i, 'o) RPC_service.t ->
'pr #simple ->
'pr ->
'a ->
'b ->
'q ->
'i ->
'o option shell_tzresult Lwt.t
val make_opt_call3 :
([< RPC_service.meth], t, ((t * 'a) * 'b) * 'c, 'q, 'i, 'o) RPC_service.t ->
'pr #simple ->
'pr ->
'a ->
'b ->
'c ->
'q ->
'i ->
'o option shell_tzresult Lwt.t
end
# 126 "v5.in.ml"
end