NAME

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

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 userdata the callback had.

AUTHOR

Florian Ragwitz <rafl@debian.org>

COPYRIGHT AND LICENSE

Copyright (c) 2008 Florian Ragwitz

This module is free software.

You may distribute this code under the same terms as Perl itself.