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|
#!perl -w
package version;
use 5.006002;
use strict;
use vars qw(@ISA $VERSION $CLASS $STRICT $LAX *declare *qv);
$VERSION = 0.9909;
$CLASS = 'version';
# !!!!Delete this next block completely when adding to Perl core!!!!
{
local $SIG{'__DIE__'};
eval "use version::vxs $VERSION";
if ( $@ ) { # don't have the XS version installed
eval "use version::vpp $VERSION"; # don't tempt fate
die "$@" if ( $@ );
push @ISA, "version::vpp";
local $^W;
*version::qv = \&version::vpp::qv;
*version::declare = \&version::vpp::declare;
*version::_VERSION = \&version::vpp::_VERSION;
*version::vcmp = \&version::vpp::vcmp;
*version::new = \&version::vpp::new;
if ($] >= 5.009000) {
no strict 'refs';
*version::stringify = \&version::vpp::stringify;
*{'version::(""'} = \&version::vpp::stringify;
*{'version::(<=>'} = \&version::vpp::vcmp;
*version::parse = \&version::vpp::parse;
}
}
else { # use XS module
push @ISA, "version::vxs";
local $^W;
*version::declare = \&version::vxs::declare;
*version::qv = \&version::vxs::qv;
*version::_VERSION = \&version::vxs::_VERSION;
*version::vcmp = \&version::vxs::VCMP;
*version::new = \&version::vxs::new;
if ($] >= 5.009000) {
no strict 'refs';
*version::stringify = \&version::vxs::stringify;
*{'version::(""'} = \&version::vxs::stringify;
*{'version::(<=>'} = \&version::vxs::VCMP;
*version::parse = \&version::vxs::parse;
}
}
}
# avoid using Exporter
require version::regex;
*version::is_lax = \&version::regex::is_lax;
*version::is_strict = \&version::regex::is_strict;
*LAX = \$version::regex::LAX;
*STRICT = \$version::regex::STRICT;
sub import {
no strict 'refs';
my ($class) = shift;
# Set up any derived class
unless ($class eq $CLASS) {
local $^W;
*{$class.'::declare'} = \&{$CLASS.'::declare'};
*{$class.'::qv'} = \&{$CLASS.'::qv'};
}
my %args;
if (@_) { # any remaining terms are arguments
map { $args{$_} = 1 } @_
}
else { # no parameters at all on use line
%args =
(
qv => 1,
'UNIVERSAL::VERSION' => 1,
);
}
my $callpkg = caller();
if (exists($args{declare})) {
*{$callpkg.'::declare'} =
sub {return $class->declare(shift) }
unless defined(&{$callpkg.'::declare'});
}
if (exists($args{qv})) {
*{$callpkg.'::qv'} =
sub {return $class->qv(shift) }
unless defined(&{$callpkg.'::qv'});
}
if (exists($args{'UNIVERSAL::VERSION'})) {
local $^W;
*UNIVERSAL::VERSION
= \&{$CLASS.'::_VERSION'};
}
if (exists($args{'VERSION'})) {
*{$callpkg.'::VERSION'} = \&{$CLASS.'::_VERSION'};
}
if (exists($args{'is_strict'})) {
*{$callpkg.'::is_strict'} = \&{$CLASS.'::is_strict'}
unless defined(&{$callpkg.'::is_strict'});
}
if (exists($args{'is_lax'})) {
*{$callpkg.'::is_lax'} = \&{$CLASS.'::is_lax'}
unless defined(&{$callpkg.'::is_lax'});
}
}
1;
|
