PadWalker - play with other peoples' lexical variables
SYNOPSIS
use PadWalker qw(peek_my peek_sub);
...
DESCRIPTION
PadWalker is a module which allows you to inspect (and even change!)
lexical variables in any subroutine which called you. It will only
show those variables which are in scope at the point of the call.
The "peek_my" routine takes one parameter, the number of call levels
to go back. (It works the same way as caller() does.) It returns a
reference to a hash which associates each variable name with a reference
to its value. The variable names include the prefix, so $x is actually '$x'.
sub increment_my_x {
my $h = peek_my(1) ;
${$h->{'$x'}}++;
}
my $x=5;
increment_my_x;
print $x; # prints 6
The "peek_sub" routine takes a coderef as its argument, and returns a hash
of the lexical variables used in that sub.
AUTHOR
Robin Houston <robin@cpan.org>
With contributions from Richard Soberberg, and bug-spotting
from Peter Scott.
SEE ALSO
Devel::LexAlias, Devel::Caller, Sub::Parameters
COPYRIGHT
Copyright (c) 2000-2002, Robin Houston. All Rights Reserved.
This module is free software. It may be used, redistributed
and/or modified under the same terms as Perl itself.
