B::Hooks::OP::Check::StashChange man page on Fedora

B::Hooks::OP::Check::StashChange man page on Fedora

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B::Hooks::OP::Check::SUserCContributed PerlB::Hooks::OP::Check::StashChange(3)

NAME
       B::Hooks::OP::Check::StashChange - Invoke callbacks when the stash code
       is being compiled in changes

SYNOPSIS
   From Perl
	   package Foo;

	   use B::Hooks::OP::Check::StashChange;

	   our $id = B::Hooks::OP::Check::StashChange::register(sub {
	       my ($new, $old) = @_;
	       warn "${old} -> ${new}";
	   });

	   package Bar; # "Foo -> Bar"

	   B::Hooks::OP::Check::StashChange::unregister($Foo::id);

	   package Moo; # callback not invoked

   From C/XS
	   #include "hooks_op_check_stashchange.h"

	   STATIC OP *
	   my_callback (pTHX_ OP *op, char *new_stash, char *old_stash, void *user_data) {
	       /* ... */
	       return op;
	   }

	   UV id;

	   /* register callback */
	   id = hook_op_check_stashchange (cv, my_callback, NULL);

	   /* unregister */
	   hook_op_check_stashchange_remove (id);

DESCRIPTION
Perl API
   register
	   B::Hooks::OP::Check::

	   # or
	   my $id = B::Hooks::OP::Check::StashChange::register(\&callback);

       Register "callback" when an opcode is being compiled in a different
       namespace than the previous one.

       An id that can be used for later removal of the handler using
       "unregister" is returned.

   unregister
	   B::Hooks::OP::Check::StashChange::unregister($id);

       Disable the callback referenced by $id.

C API
   TYPES
       OP *(*hook_op_check_stashchange_cb) (pTHX_ OP *op, const char
       *new_stash, const char *old_stash, void *user_data)

       The type the callbacks need to implement.

   FUNCTIONS
       UV hook_op_check_stashchange (hook_op_check_stashchange_cb cb, void
       *user_data)

       Register the callback "cb" to be when an opcode is compiled in a
       different namespace than the previous. "user_data" will be passed to
       the callback as the last argument.

       Returns an id that can be used to remove the handler using
       "hook_op_check_stashchange_remove".

       void *hook_op_check_stashchange_remove (UV id)

       Remove a previously registered handler referred to by "id".

       Returns the user data that was associated with the handler.

SEE ALSO
       B::Hooks::OP::Check

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 v5.14.1			  2009-04-1B::Hooks::OP::Check::StashChange(3)

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