Provided by: libkwargs-perl_0.01-1_all bug


       Kwargs - Simple, clean handing of named/keyword arguments.


       version 0.01


           use Kwargs;

           # just named
           my ($foo, $bar, baz) = kw @_, qw(foo bar baz);

           # positional followed by named
           my ($pos, $opt_one, $opt_two) = kwn @_, 1, qw(opt_one opt_two)

           # just a hashref
           my $opts = kw @_;

           # positional then hashref
           my ($one, $two, $opts) = kwn @_, 2;


       Named arguments are good, especially when you take lots of (sometimes optional) arguments.
       There are two styles of passing named arguments (by convention) in perl though, with and
       without braces:

           sub foo {
               my $args = shift;
               my $bar  = $args->{bar};

           foo({ bar => 'baz' });

           sub bar {
               my %args = @_;
               my $foo  = $args{foo};

           bar(foo => 'baz');

       If you want to support both calling styles (because it should be mainly a style issue),
       then you have to do something like this:

           sub foo {
               my $args = ref $_[0] eq 'HASH' ? $_[0] : { @_ };
               my $bar  = $args->{bar};

       Which is annoying, and not even entirely correct. What if someone wanted to pass in a tied
       object for their optional arguments? That could work, but what are the right semantics for
       checking for it?  It also gets uglier if you want to unpack your keyword arguments in one
       line for clarity:

           sub foo {
               my ($one, $two, $three) =
                   @{ ref $_[0] eq 'HASH' ? $_[0] : { @_ } }{qw(one two three) };

       Did I say clarity? HAHAHAHAHA! Surely no one would actually put something like that in his
       code. Except I found myself typing this very thing, and That Is Why.


       Two functions (kw and kwn) are exported by default. You can also ask for them individually
       or rename them to something else.  See Sub::Exporter for details.

   kw(@array, @names)
       Short for "kwn(@array, 0, @names)"

   kwn(@array, $number_of_positional_args, @names)
       Conceptually shifts off n positional arguments from array, then figures out whether the
       rest of the array is a list of key-value pairs or a single argument (usually, but not
       necessarily, a hashref). If you passed in any @names, these are used as keys into the
       hash, and the values at those keys are appended to any positional arguments and returned.
       If you do not pass @names, you will get a hashref (or whatever the single argument was,
       like a tied object) back.

       Note that if the single argument cannot be dereferenced as a hashref, this can die. No
       attempt is made by this module to handle the exception.


       Paul Driver <>


       This software is copyright (c) 2011 by Paul Driver <>.

       This is free software; you can redistribute it and/or modify it under the same terms as
       the Perl 5 programming language system itself.