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use strict;
use warnings;
package Class::Load::PP;
our $VERSION = '0.25';
use Module::Runtime ();
use Package::Stash 0.14;
use Scalar::Util ();
use Try::Tiny;
sub is_class_loaded {
my $class = shift;
my $options = shift;
my $loaded = _is_class_loaded($class);
return $loaded if ! $loaded;
return $loaded unless $options && $options->{-version};
return try {
$class->VERSION($options->{-version});
1;
}
catch {
0;
};
}
sub _is_class_loaded {
my $class = shift;
return 0 unless Module::Runtime::is_module_name($class);
my $stash = Package::Stash->new($class);
if ($stash->has_symbol('$VERSION')) {
my $version = ${ $stash->get_symbol('$VERSION') };
if (defined $version) {
return 1 if ! ref $version;
# Sometimes $VERSION ends up as a reference to undef (weird)
return 1 if ref $version && Scalar::Util::reftype $version eq 'SCALAR' && defined ${$version};
# a version object
return 1 if Scalar::Util::blessed $version;
}
}
if ($stash->has_symbol('@ISA')) {
return 1 if @{ $stash->get_symbol('@ISA') };
}
# check for any method
return 1 if $stash->list_all_symbols('CODE');
# fail
return 0;
}
1;