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This queue is for tickets about the IO-stringy CPAN distribution.

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The Basics
Id: 38642
Status: new
Priority: 0/
Queue: IO-stringy

People
Owner: Nobody in particular
Requestors: hightowe [...] cpan.org
Cc:
AdminCc:

Bug Information
Severity: Important
Broken in:
  • 1.220
  • 2.108
  • 2.109
  • 2.110
Fixed in: (no value)

Attachments


Subject: PATCH: Adds overload methods for eq, ne, ==, and !=
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text/plain 836b
The attached patch adds support for comparison operators to IO::Scalar, so that this code: Show quoted text
> #!/usr/bin/perl > > use strict; > use IO::Scalar; > my $a; my $b; > my $fh_a=new IO::Scalar \$a; > my $fh_b=new IO::Scalar \$b; > if ($fh_a eq $fh_b) { print "eq (wrong)\n"; } > if ($fh_a eq $fh_a) { print "eq (right)\n"; } > if ($fh_a ne $fh_a) { print "ne (wrong)\n"; } > if ($fh_a ne $fh_b) { print "ne (right)\n"; } > if ($fh_a == $fh_b) { print "== (wrong)\n"; } > if ($fh_a == $fh_a) { print "== (right)\n"; } > if ($fh_a != $fh_a) { print "!= (wrong)\n"; } > if ($fh_a != $fh_b) { print "!= (right)\n"; }
will yield this result, when run: Show quoted text
> eq (right) > ne (right) > == (right) > != (right)
I have noted that some perl modules, that use file handles, use these types of comparison operators to determine if the handles are the same.
Subject: IO_Scalar.comparison_ops.patch
--- /usr/share/perl5/IO/Scalar.pm.orig 2008-08-21 14:30:34.000000000 -0400 +++ /usr/share/perl5/IO/Scalar.pm 2008-08-21 14:30:40.000000000 -0400 @@ -150,12 +150,22 @@ use strict; use vars qw($VERSION @ISA); use IO::Handle; +use Scalar::Util; use 5.005; ### Stringification, courtesy of B. K. Oxley (binkley): :-) use overload '""' => sub { ${*{$_[0]}->{SR}} }; +use overload 'eq' => sub { + return (Scalar::Util::refaddr($_[0]) == Scalar::Util::refaddr($_[1])); +}; +use overload '==' => overload::Method(__PACKAGE__,'eq'); +use overload 'ne' => sub { + return (Scalar::Util::refaddr($_[0]) != Scalar::Util::refaddr($_[1])); +}; +use overload '!=' => overload::Method(__PACKAGE__,'ne'); use overload 'bool' => sub { 1 }; ### have to do this, so object is true! +use overload 'fallback' => 0; ### The package version, both in 1.23 style *and* usable by MakeMaker: $VERSION = "2.110";


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