Howdy!

OK. Short answer: both guilty, sort of. Consider 'foo.pl': 

#!/usr/bin/perl
use strict;
use warnings;
use Set::Scalar::Valued;

test_args(Set::Scalar::Valued->new());

sub test_args
{
        my @opt_args;
        while (my $arg = shift)
        {
                if (ref($arg) eq 'ARRAY')
                {
                        push @opt_args, @$arg;
                }
                else
                {
                        push @opt_args, $arg;
                }
        }
        print scalar(@opt_args), "\n";
}

[download]

Now consider the following session via 'perl -d foo.pl': 

main::(foo.pl:6):       test_args(Set::Scalar->new());
                                                                      
+                         DB<0> s
Set::Scalar::Base::new(/Library/Perl/5.8.6/Set/Scalar/Base.pm:68):
68:         my $class = shift;
                                                                      
+                         DB<0> r
list context return from Set::Scalar::Base::new:
0  Set::Scalar=HASH(0x18092cc)
   'elements' => HASH(0x194c7d4)
        empty hash
   'universe' => Set::Scalar::Universe=HASH(0x18d312c)
      'elements' => HASH(0x18b1db0)
           empty hash
      'null' => Set::Scalar::Null=HASH(0x18acce4)
         'universe' => Set::Scalar::Universe=HASH(0x18d312c)
            -> REUSED_ADDRESS
      'universe' => undef
main::test_args(foo.pl:10):             my @opt_args;
                                                                      
+                         DB<0> n
main::test_args(foo.pl:11):             while (my $arg = shift)
main::test_args(foo.pl:12):             {
                                                                      
+                         DB<0> s
Set::Scalar::Base::size(/Library/Perl/5.8.6/Set/Scalar/Base.pm:122):
122:        my $self = shift;

[download]

I'm now puzzling over just how one goes from "my $arg = shift" to Set::Scalar::Base::size... and I return from a bit more digging.

Set::Scalar::Base overloads 'bool' by calling 'size'. Aha!

When I change the while condition to do "defined my $arg = shift", it works correctly. Methinks a patch is in order...

This has been an interesting course of investigation. I hope y'all have not found it boring.

yours,
Michael

In reply to Re: Difficulty with Object::InsideOut by herveus
in thread Difficulty with Object::InsideOut by herveus

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