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

NAME
       Devel::ArgNames - Figure out the names of variables passed into
       subroutines.

SYNOPSIS
               use Devel::ArgNames;

               sub foo {
                       warn "foo() called with arguments: "
                               . join(", ", map { defined() ? $_ : "<unknown>" } arg_names(@_) );
               }

               foo($bar, $gorch, $blah[4]);

DESCRIPTION
       When print-debugging code, you will often ind yourself going:

               print "\$foo is $foo, \$bar is $bar"

       With this module, you can write a reusable subroutine easily:

               sub my_print_vars {
                       my %vars;

                       @vars{arg_names()} = @_;

                       foreach my $var ( keys %vars ) {
                               warn "$var is $vars{$var}\n";
                       }
               }

               my_print_vars($foo, $bar);

       This module doesn't provide dumping facilities because there are too
       many to choose from. This is a DIY kit ;-)

EXPORTS
       arg_names [ $level ]
           This function will return the names associated with the variables
           found on @_, at the level $level. If $level is not provided
           "arg_names"'s caller's caller will be used ("$level == 2" in that
           case).

VERSION CONTROL
       This module is maintained using Darcs. You can get the latest version
       from <http://nothingmuch.woobling.org/Devel-ArgNames/>, and use "darcs
       send" to commit changes.

SEE ALSO
       Data::Dumper::Simple, DB, Devel::Caller, Devel::Caller::Perl,
       PadWalker.

AUTHORS
       Ran Eilam

       Yuval Kogman <nothingmuch@woobling.org>

COPYRIGHT
               Copyright (c) 2007 Yuval Kogman. All rights reserved
               This program is free software; you can redistribute
               it and/or modify it under the same terms as Perl itself.

perl v5.32.0                      2020-12-28              Devel::ArgNames(3pm)

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