package caqti

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in-package search v0.2.0

Unified interface to relational database libraries

Install

sha256=b8ea432820154ec095132c4f7b244b06cd8553e0b2035185b844d9c4f30af8bb

sha512=b7e3ad8e6a9b587db2d517e15cd42df2945148f9223b2fa6f4bc2bcdd2709d53549cca4b65e54511d22466e4c9aa7f0b9c17305a07505519d8bf81d95de629b8

type +'a t

A concurrency monad with an optional failure monad, or just the identity type constructor for blocking operation.

module Infix : sig ... end

val return : 'a -> 'a t

Return operation of the concurrency monad.

val catch : (unit -> 'a t) -> (exn -> 'a t) -> 'a t

val finally : (unit -> 'a t) -> (unit -> unit t) -> 'a t

finally f g runs f () and then runs g () whether the former finished, failed with an exception, or failed with a monadic failure.

val cleanup : (unit -> 'a t) -> (unit -> unit t) -> 'a t

cleanup f g runs f () and then runs g () and re-raise the failure if and only if f () failed with an exception or a monadic failure.