package DateTime::Infinite;
BEGIN {
$DateTime::Infinite::VERSION = '0.66';
}
use strict;
use warnings;
use DateTime;
use DateTime::TimeZone;
use base qw(DateTime);
foreach my $m (qw( set set_time_zone truncate )) {
no strict 'refs';
*{"DateTime::Infinite::$m"} = sub { return $_[0] };
}
sub is_finite {0}
sub is_infinite {1}
sub _rd2ymd {
return $_[2] ? ( $_[1] ) x 7 : ( $_[1] ) x 3;
}
sub _seconds_as_components {
return ( $_[1] ) x 3;
}
sub _stringify {
$_[0]->{utc_rd_days} == DateTime::INFINITY
? DateTime::INFINITY . ''
: DateTime::NEG_INFINITY . '';
}
sub STORABLE_freeze {return}
sub STORABLE_thaw {return}
package DateTime::Infinite::Future;
BEGIN {
$DateTime::Infinite::Future::VERSION = '0.66';
}
use base qw(DateTime::Infinite);
{
my $Pos = bless {
utc_rd_days => DateTime::INFINITY,
utc_rd_secs => DateTime::INFINITY,
local_rd_days => DateTime::INFINITY,
local_rd_secs => DateTime::INFINITY,
rd_nanosecs => DateTime::INFINITY,
tz => DateTime::TimeZone->new( name => 'floating' ),
},
__PACKAGE__;
$Pos->_calc_utc_rd;
$Pos->_calc_local_rd;
sub new {$Pos}
}
package DateTime::Infinite::Past;
BEGIN {
$DateTime::Infinite::Past::VERSION = '0.66';
}
use base qw(DateTime::Infinite);
{
my $Neg = bless {
utc_rd_days => DateTime::NEG_INFINITY,
utc_rd_secs => DateTime::NEG_INFINITY,
local_rd_days => DateTime::NEG_INFINITY,
local_rd_secs => DateTime::NEG_INFINITY,
rd_nanosecs => DateTime::NEG_INFINITY,
tz => DateTime::TimeZone->new( name => 'floating' ),
},
__PACKAGE__;
$Neg->_calc_utc_rd;
$Neg->_calc_local_rd;
sub new {$Neg}
}
1;
# ABSTRACT: Infinite past and future DateTime objects
=pod
=head1 NAME
DateTime::Infinite - Infinite past and future DateTime objects
=head1 VERSION
version 0.66
=head1 SYNOPSIS
my $future = DateTime::Infinite::Future->new();
my $past = DateTime::Infinite::Past->new();
=head1 DESCRIPTION
This module provides two L<DateTime.pm|DateTime> subclasses,
C<DateTime::Infinite::Future> and C<DateTime::Infinite::Past>.
The objects are in the "floating" timezone, and this cannot be
changed.
=head1 BUGS
There seem to be lots of problems when dealing with infinite numbers
on Win32. This may be a problem with this code, Perl, or Win32's IEEE
math implementation. Either way, the module may not be well-behaved
on Win32 operating systems.
=head1 METHODS
The only constructor for these two classes is the C<new()> method, as
shown in the L<SYNOPSIS|/SYNOPSIS>. This method takes no parameters.
All "get" methods in this module simply return infinity, positive or
negative. If the method is expected to return a string, it return the
string representation of positive or negative infinity used by your
system. For example, on my system calling C<year()> returns a number
which when printed appears either "inf" or "-inf".
The object is not mutable, so the C<set()>, C<set_time_zone()>, and
C<truncate()> methods are all do-nothing methods that simply return
the object they are called with.
Obviously, the C<is_finite()> method returns false and the
C<is_infinite()> method returns true.
=head1 SEE ALSO
datetime@perl.org mailing list
http://datetime.perl.org/
=head1 AUTHOR
Dave Rolsky <autarch@urth.org>
=head1 COPYRIGHT AND LICENSE
This software is Copyright (c) 2010 by Dave Rolsky.
This is free software, licensed under:
The Artistic License 2.0
=cut
__END__