88 lines
1.8 KiB
Perl
88 lines
1.8 KiB
Perl
package MooseX::Traits::Util;
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use strict;
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use warnings;
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our $VERSION = '0.13';
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use Sub::Exporter -setup => {
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exports => ['new_class_with_traits'],
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};
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use Class::Load ();
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use Carp ();
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# note: "$class" throughout is "class name" or "instance of class
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# name"
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sub check_class {
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my $class = shift;
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Carp::confess "We can't interact with traits for a class ($class) ".
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"that does not do MooseX::Traits" unless $class->does('MooseX::Traits');
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}
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sub transform_trait {
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my ($class, $name) = @_;
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return $1 if $name =~ /^[+](.+)$/;
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check_class($class);
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my $namespace = $class->meta->find_attribute_by_name('_trait_namespace');
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my $base;
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if($namespace->has_default){
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$base = $namespace->default;
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if(ref $base eq 'CODE'){
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$base = $base->();
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}
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}
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return $name unless $base;
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return join '::', $base, $name;
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}
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sub resolve_traits {
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my ($class, @traits) = @_;
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check_class($class);
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return map {
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my $orig = $_;
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if(!ref $orig){
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my $transformed = transform_trait($class, $orig);
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Class::Load::load_class($transformed);
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$transformed;
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}
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else {
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$orig;
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}
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} @traits;
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}
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my $anon_serial = 0;
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sub new_class_with_traits {
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my ($class, @traits) = @_;
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check_class($class);
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my $meta;
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@traits = resolve_traits($class, @traits);
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if (@traits) {
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$meta = $class->meta->create(
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join(q{::} => 'MooseX::Traits::__ANON__::SERIAL', ++$anon_serial),
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superclasses => [ $class->meta->name ],
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roles => \@traits,
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cache => 1,
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);
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}
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# if no traits were given just return the class meta
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return $meta ? $meta : $class->meta;
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}
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1;
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=for Pod::Coverage check_class new_class_with_traits resolve_traits transform_trait
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=cut
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