JezK
Edit File: Number.pm
# $Id$ # # This is free software, you may use it and distribute it under the same terms as # Perl itself. # # Copyright 2001-2003 AxKit.com Ltd., 2002-2006 Christian Glahn, 2006-2009 Petr Pajas # # package XML::LibXML::Number; use XML::LibXML::Boolean; use XML::LibXML::Literal; use strict; use warnings; use vars qw ($VERSION); $VERSION = "2.0134"; # VERSION TEMPLATE: DO NOT CHANGE use overload '""' => \&value, '0+' => \&value, '<=>' => \&cmp; sub new { my $class = shift; my $number = shift; if ($number !~ /^\s*(-\s*)?(\d+(\.\d*)?|\.\d+)\s*$/) { $number = undef; } else { $number =~ s/\s+//g; } bless \$number, $class; } sub as_string { my $self = shift; defined $$self ? $$self : 'NaN'; } sub as_xml { my $self = shift; return "<Number>" . (defined($$self) ? $$self : 'NaN') . "</Number>\n"; } sub value { my $self = shift; $$self; } sub cmp { my $self = shift; my ($other, $swap) = @_; if ($swap) { return $other <=> $$self; } return $$self <=> $other; } sub evaluate { my $self = shift; $self; } sub to_boolean { my $self = shift; return $$self ? XML::LibXML::Boolean->True : XML::LibXML::Boolean->False; } sub to_literal { XML::LibXML::Literal->new($_[0]->as_string); } sub to_number { $_[0]; } sub string_value { return $_[0]->value } 1; __END__ =head1 NAME XML::LibXML::Number - Simple numeric values. =head1 DESCRIPTION This class holds simple numeric values. It doesn't support -0, +/- Infinity, or NaN, as the XPath spec says it should, but I'm not hurting anyone I don't think. =head1 API =head2 new($num) Creates a new XML::LibXML::Number object, with the value in $num. Does some rudimentary numeric checking on $num to ensure it actually is a number. =head2 value() Also as overloaded stringification. Returns the numeric value held. =cut