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B::Hooks::OP::Check(3)               User Contributed Perl Documentation              B::Hooks::OP::Check(3)



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.



perl v5.12.5                                     2011-09-10                           B::Hooks::OP::Check(3)