devel::caller(3pm) [debian man page]

Devel::Caller(3pm)					User Contributed Perl Documentation					Devel::Caller(3pm)

NAME

       Devel::Caller - meatier versions of "caller"

SYNOPSIS

	use Devel::Caller qw(caller_cv);
	$foo = sub { print "huzzah
" if $foo == caller_cv(0) };
	$foo->();  # prints huzzah

	use Devel::Caller qw(called_with);
	sub foo { print called_with(0,1); }
	foo( my @foo ); # should print '@foo'

DESCRIPTION

       caller_cv($level)
	   "caller_cv" gives you the coderef of the subroutine being invoked at the call frame indicated by the value of $level

       caller_args($level)
	   Returns the arguments passed into the caller at level $level

       caller_vars( $level, $names ) =item called_with($level, $names)
	   "called_with" returns a list of references to the original arguments to the subroutine at $level.  if $names is true, the names of the
	   variables will be returned instead

	   constants are returned as "undef" in both cases

       called_as_method($level)
	   "called_as_method" returns true if the subroutine at $level was called as a method.

BUGS

       All of these routines are susceptible to the same limitations as "caller" as described in "caller" in perlfunc

       The deparsing of the optree perfomed by called_with is fairly simple-minded and so a bit flaky.

       o   As a version 2.0 of Devel::Caller we no longer maintain compatibility with versions of perl earlier than 5.8.2.  Older versions
	   continue to be available from CPAN and backpan.

SEE ALSO

       "caller" in perlfunc, PadWalker, Devel::Peek

AUTHOR

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

COPYRIGHT

       Copyright (c) 2002, 2003, 2006, 2007, 2008, 2010 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 v5.14.2							    2011-11-15							Devel::Caller(3pm)

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@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.

perl v5.14.2							    2002-07-25							     LexAlias(3pm)