LexAlias(3pm)                  User Contributed Perl Documentation                  LexAlias(3pm)



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 AT unixbeard.net> with close reference to PadWalker by Robin Houston

COPYRIGHT
       Copyright (c) 2002, 2013, 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.



perl v5.20.0                                2013-01-16                              LexAlias(3pm)