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Caller.pm	7.29 KB	-rw-r--r--
LexAlias.pm	2.1 KB	-rw-r--r--
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Size.pm	10.4 KB	-rw-r--r--

Code Editor : LexAlias.pm

package Devel::LexAlias;
require DynaLoader;
use Devel::Caller qw(caller_cv);

require 5.005003;

@ISA = qw(Exporter DynaLoader);
@EXPORT_OK = qw(lexalias);

$VERSION = '0.05';

bootstrap Devel::LexAlias $VERSION;

sub lexalias {
    my $cv = shift;
    unless (ref $cv eq 'CODE') {
        $cv = caller_cv($cv + 1);
    }

return _lexalias($cv, @_);
}

1;
__END__

=head1 NAME

Devel::LexAlias - alias lexical variables

=head1 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
 }

=head1 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?

=over

=item lexalias( $where, $name, $variable )

C<$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 C<caller>

C<$name> is the name of the lexical within that subroutine

C<$variable> is a reference to the variable to install at that location

=back

=head1 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.

=head1 SEE ALSO

peek_sub from L<PadWalker>, L<Devel::Peek>

=head1 AUTHOR

Richard Clamp E<lt>richardc@unixbeard.netE<gt> with close reference to
PadWalker by Robin Houston

=head1 COPYRIGHT

=cut

${this.title}

Code Editor : LexAlias.pm