Richard Clamp > Devel-LexAlias-0.04 > Devel::LexAlias

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Module Version: 0.04   Source   Latest Release: Devel-LexAlias-0.05

NAME ^

Devel::LexAlias - alias lexical variables

SYNOPSIS ^

 use Devel::LexAlias qw(lexalias);

 sub steal_my_x {
     my $foo = 1;
     lexalias(1, '$x', \$foo);
 }

 sub foo {
     my $x = 22;
     print $x; # prints 22

     steal_my_x;
     print $x; # prints 1
 }

DESCRIPTION ^

Devel::LexAlias provides the ability to alias a lexical variable in a subroutines scope to one of your choosing.

If you don't know why you'd want to do this, I'd suggest that you skip this module. If you think you have a use for it, I'd insist on it.

Still here?

lexalias( $where, $name, $variable )

$where refers to the subroutine in which to alias the lexical, it can be a coderef or a call level such that you'd give to caller

$name is the name of the lexical within that subroutine

$variable is a reference to the variable to install at that location

BUGS ^

lexalias delves into the internals of the interpreter to perform its actions and is so very sensitive to bad data, which will likely result in flaming death, or a core dump. Consider this a warning.

There is no checking that you are attaching a suitable variable back into the pad as implied by the name of the variable, so it is possible to do the following:

 lexalias( $sub, '$foo', [qw(an array)] );

The behaviour of this is untested, I imagine badness is very close on the horizon though.

SEE ALSO ^

peek_sub from PadWalker, Devel::Peek

AUTHOR ^

Richard Clamp <richardc@unixbeard.net> with close reference to PadWalker by Robin Houston

COPYRIGHT ^

Copyright (c) 2002, Richard Clamp. All Rights Reserved. This module is free software. It may be used, redistributed and/or modified under the same terms as Perl itself.

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