Monkey::Patch(3pm)					User Contributed Perl Documentation					Monkey::Patch(3pm)

NAME

       Monkey::Patch - Scoped monkeypatching (you can at least play nice)

VERSION

       version 0.03

SYNOPSIS

	   use Monkey::Patch qw(:all);

	   sub some_subroutine {
	       my $pkg = patch_class 'Some::Class' => 'something' => sub {
		   my $original = shift;
		   say "Whee!";
		   $original->(@_);
	       };
	       Some::Class->something(); # says Whee! and does whatever
	       undef $pkg;
	       Some::Class->something(); # no longer says Whee!

	       my $obj = Some::Class->new;
	       my $obj2 = Some::Class->new;

	       my $whoah = patch_object $obj, 'twiddle' => sub {
		   my $original = shift;
		   my $self	= shift;
		   say "Whoah!";
		   $self->$original(@_);
	       };

	       $obj->twiddle();  # says Whoah!
	       $obj2->twiddle(); # doesn't
	       $obj->twiddle()	 # still does
	       undef $whoah;
	       $obj->twiddle();  # but not any more

SUBROUTINES

       The following subroutines are available (either individually or via :all)

   patch_package (package, subname, code)
       Wraps "package"'s subroutine named <subname> with your <code>.  Your code recieves the original subroutine as its first argument, followed
       by any arguments the subroutine would have normally gotten.  You can always call the subroutine ref your received; if there was no
       subroutine by that name, the coderef will simply do nothing.

   patch_class (class, methodname, code)
       Just like "patch_package", except that the @ISA chain is walked when you try to call the original subroutine if there wasn't any subroutine
       by that name in the package.

   patch_object (object, methodname, code)
       Just like "patch_class", except that your code will only get called on the object you pass, not the entire class.

HANDLES

       All the "patch" functions return a handle object.  As soon as you lose the value of the handle (by calling in void context, assigning over
       the variable, undeffing the variable, letting it go out of scope, etc), the monkey patch is unwrapped.  You can stack monkeypatches and let
       go of the handles in any order; they obey a stack discipline, and the most recent valid monkeypatch will always be called.  Calling the
       "original" argument to your wrapper routine will always call the next-most-recent monkeypatched version (or, the original subroutine, of
       course).

BUGS

       This magic is only faintly black, but mucking around with the symbol table is not for the faint of heart.  Help make this module better by
       reporting any strange behavior that you see!

perl v5.10.1							    2010-07-16							Monkey::Patch(3pm)