B::Hooks::OP::Check(3)

NAME
B::Hooks::OP::Check - Wrap OP check callbacks

VERSION
version 0.22

SYNOPSIS
    # include "hook_op_check.h"

    STATIC OP *my_const_check_op (pTHX_ OP *op, void *user_data) {
        /* ... */
        return op;
    }

    STATIC hook_op_check_id my_hook_id = 0;

    void
    setup ()
        CODE:
            my_hook_id = hook_op_check (OP_CONST, my_const_check_op, NULL);

    void
    teardown ()
        CODE:
            hook_op_check_remove (OP_CONST, my_hook_id);

DESCRIPTION
This module provides a C API for XS modules to hook into the callbacks of "PL_check".

ExtUtils::Depends is used to export all functions for other XS modules to use. Include the following in your Makefile.PL:

    my $pkg = ExtUtils::Depends->new('Your::XSModule', 'B::Hooks::OP::Check');
    WriteMakefile(
        ... # your normal makefile flags
        $pkg->get_makefile_vars,
    );

Your XS module can now include "hook_op_check.h".

TYPES

  typedef OP *(*hook_op_check_cb) (pTHX_ OP *, void *);
Type that callbacks need to implement.

  typedef UV hook_op_check_id
Type to identify a callback.

FUNCTIONS

  hook_op_check_id hook_op_check (opcode type, hook_op_check_cb cb, void *user_data)
Register the callback "cb" to be called after the "PL_check" function for opcodes of the given "type". "user_data" will be passed to the callback as the last argument. Returns an id that can be used to remove the callback later on.

  void *hook_op_check_remove (opcode type, hook_op_check_id id)
Remove the callback identified by "id". Returns the user_data that the callback had.

SUPPORT
Bugs may be submitted through the RT bug tracker <https://rt.cpan.org/Public/Dist/Display.html?Name=B-Hooks-OP-Check> (or bug-B-Hooks-OP-Check@rt.cpan.org <mailto:bug-B-Hooks-OP-Check@rt.cpan.org>).

AUTHOR
Florian Ragwitz <rafl@debian.org>

CONTRIBUTORS

•   Karen Etheridge <ether@cpan.org>

•   Zefram <zefram@fysh.org>

•   Alexandr Ciornii <alexchorny@gmail.com>

COPYRIGHT AND LICENCE
This software is copyright (c) 2008 by Florian Ragwitz.

This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.