package ppx_deriving

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Type-driven code generation for OCaml >=4.02.2

Install

Dune Dependency

github.com Readme Changelog Edit opam file Versions (11)

Authors

W

whitequark <whitequark@whitequark.org>

Maintainers

W

whitequark <whitequark@whitequark.org>

Sources

v4.4.tar.gz

sha256=c2d85af4cb65a1f163f624590fb0395a164bbfd0d05082092526b669e66bcc34

doc/ppx_deriving.runtime/Ppx_deriving_runtime/Callback/index.html

Module `Ppx_deriving_runtime.Callback`

Registering OCaml values with the C runtime.

This module allows OCaml values to be registered with the C runtime under a symbolic name, so that C code can later call back registered OCaml functions, or raise registered OCaml exceptions.

val register : string -> 'a -> unit

Callback.register n v registers the value v under the name n. C code can later retrieve a handle to v by calling caml_named_value(n).

val register_exception : string -> exn -> unit

Callback.register_exception n exn registers the exception contained in the exception value exn under the name n. C code can later retrieve a handle to the exception by calling caml_named_value(n). The exception value thus obtained is suitable for passing as first argument to raise_constant or raise_with_arg.