package core_kernel

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Industrial strength alternative to OCaml's standard library

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Dune Dependency

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Authors

J

Jane Street Group, LLC

Maintainers

J

Jane Street developers

Sources

v0.14.1.tar.gz

sha256=1d91a0d58e9a98809eb3bc888ae716e786c68ad5d07a874c37d9c1ef9fd24438

md5=77b25affd5155128ca757d38e496d89f

doc/core_kernel.bus/Bus/Callback_arity/index.html

Module `Bus.Callback_arity`

Callback_arity states the type of callbacks stored in a bus. Using Callback_arity is an implementation technique that allows callbacks to be defined as ordinary n-ary curried functions (e.g., a1 -> a2 -> a3 -> r), instead of forcing n-ary-variadic callbacks to use tuples (e.g., a1 * a2 * a3 -> r). This also avoids extra allocation.

When reading the bus interface, keep in mind that each 'callback is limited, through create, to the types exposed by the variants in Callback_arity.

type _ t =

| Arity1 : ('a -> unit) t
| Arity2 : ('a -> 'b -> unit) t
| Arity3 : ('a -> 'b -> 'c -> unit) t
| Arity4 : ('a -> 'b -> 'c -> 'd -> unit) t
| Arity5 : ('a -> 'b -> 'c -> 'd -> 'e -> unit) t

val sexp_of_t : 
  ('v_x__001_ -> Ppx_sexp_conv_lib.Sexp.t) ->
  'v_x__001_ t ->
  Ppx_sexp_conv_lib.Sexp.t