package eio

  1. Overview
  2. Docs
Effect-based direct-style IO API for OCaml

Install 

dune-project
 Dependency

github.com Readme Changelog ISC License Edit opam file Versions (19)

Authors

  1. A
    Anil Madhavapeddy
  2. T
    Thomas Leonard

Maintainers

  1. A
    anil@recoil.org

Sources

eio-1.3.tbz
sha256=8ed5c13e6689f31c85dca5f12762d84b8cc0042a7b07d3e464df6eb4b72b3dfc
sha512=46e8f817f32c3316e7f35835a136ad177a295b3306351eb2efa2386482b0169a5b19ed2925b32da2a1f10d40f083fe3d588dd401908f9fec6e4a44cd68535204

doc/eio/Eio/Exn/Backend/index.html

Module Exn.BackendSource

Extensible backend-specific exceptions.

Sourcetype t = ..
Sourceval show : bool ref

Controls the behaviour of pp.

Sourceval register_pp : (Format.formatter -> t -> bool) -> unit

register_pp pp adds pp as a pretty-printer of backend errors.

pp f err should format err using f, if possible. It should return true on success, or false if it didn't recognise err.

Sourceval pp : t Fmt.t

pp behaves like pp except that if display of backend errors has been turned off (with show) then it just prints a place-holder.

This is useful for formatting the backend-specific part of exceptions, which should be hidden in expect-style testing that needs to work on multiple backends.