bump version to 0.63

[gitmo/Moose.git] / lib / Moose / Meta / TypeCoercion.pm

diff --git a/lib/Moose/Meta/TypeCoercion.pm b/lib/Moose/Meta/TypeCoercion.pm
index 1e9f470..480b202 100644 (file)
--- a/lib/Moose/Meta/TypeCoercion.pm
+++ b/lib/Moose/Meta/TypeCoercion.pm
@@ -5,17 +5,18 @@ use strict;
 use warnings;
 use metaclass;
 
-use Carp 'confess';
-
 use Moose::Meta::Attribute;
-use Moose::Util::TypeConstraints;
+use Moose::Util::TypeConstraints ();
 
-our $VERSION = '0.01';
+our $VERSION   = '0.63';
+$VERSION = eval $VERSION;
+our $AUTHORITY = 'cpan:STEVAN';
 
 __PACKAGE__->meta->add_attribute('type_coercion_map' => (
     reader  => 'type_coercion_map',
     default => sub { [] }
 ));
+
 __PACKAGE__->meta->add_attribute(
     Moose::Meta::Attribute->new('type_constraint' => (
         reader   => 'type_constraint',
@@ -31,7 +32,7 @@ __PACKAGE__->meta->add_attribute('compiled_type_coercion' => (
 sub new { 
     my $class = shift;
     my $self  = $class->meta->new_object(@_);
-    $self->compile_type_coercion();
+    $self->compile_type_coercion;
     return $self;
 }
 
@@ -41,17 +42,20 @@ sub compile_type_coercion {
     my @coercions;
     while (@coercion_map) {
         my ($constraint_name, $action) = splice(@coercion_map, 0, 2);
-        my $constraint = Moose::Util::TypeConstraints::find_type_constraint($constraint_name)->_compiled_type_constraint;       
-        (defined $constraint)
-            || confess "Could not find the type constraint ($constraint_name)";
-        push @coercions => [  $constraint, $action ];
+        my $type_constraint = ref $constraint_name ? $constraint_name : Moose::Util::TypeConstraints::find_or_parse_type_constraint($constraint_name);
+        (defined $type_constraint)
+            || Moose->throw_error("Could not find the type constraint ($constraint_name) to coerce from");
+        push @coercions => [ 
+            $type_constraint->_compiled_type_constraint, 
+            $action 
+        ];
     }
     $self->_compiled_type_coercion(sub { 
         my $thing = shift;
         foreach my $coercion (@coercions) {
             my ($constraint, $converter) = @$coercion;
-            if (defined $constraint->($thing)) {
-                           local $_ = $thing;                
+            if ($constraint->($thing)) {
+                local $_ = $thing;                
                 return $converter->($thing);
             }
         }
@@ -59,6 +63,31 @@ sub compile_type_coercion {
     });    
 }
 
+sub has_coercion_for_type {
+    my ($self, $type_name) = @_;
+    my %coercion_map = @{$self->type_coercion_map};
+    exists $coercion_map{$type_name} ? 1 : 0;
+}
+
+sub add_type_coercions {
+    my ($self, @new_coercion_map) = @_;
+        
+    my $coercion_map = $self->type_coercion_map;    
+    my %has_coercion = @$coercion_map;
+    
+    while (@new_coercion_map) {
+        my ($constraint_name, $action) = splice(@new_coercion_map, 0, 2);        
+        
+        Moose->throw_error("A coercion action already exists for '$constraint_name'")
+            if exists $has_coercion{$constraint_name};
+        
+        push @{$coercion_map} => ($constraint_name, $action);
+    }
+    
+    # and re-compile ...
+    $self->compile_type_coercion;
+}
+
 sub coerce { $_[0]->_compiled_type_coercion->($_[1]) }
 
 
@@ -70,12 +99,19 @@ __END__
 
 =head1 NAME
 
-Moose::Meta::TypeCoercion - The Moose Type Coercion metaobject
-
-=head1 SYNOPSIS
+Moose::Meta::TypeCoercion - The Moose Type Coercion metaclass
 
 =head1 DESCRIPTION
 
+For the most part, the only time you will ever encounter an 
+instance of this class is if you are doing some serious deep 
+introspection. This API should not be considered final, but 
+it is B<highly unlikely> that this will matter to a regular 
+Moose user.
+
+If you wish to use features at this depth, please come to the 
+#moose IRC channel on irc.perl.org and we can talk :)
+
 =head1 METHODS
 
 =over 4
@@ -84,14 +120,18 @@ Moose::Meta::TypeCoercion - The Moose Type Coercion metaobject
 
 =item B<new>
 
-=item B<coerce>
-
 =item B<compile_type_coercion>
 
+=item B<coerce>
+
 =item B<type_coercion_map>
 
 =item B<type_constraint>
 
+=item B<has_coercion_for_type>
+
+=item B<add_type_coercions>
+
 =back
 
 =head1 BUGS
@@ -106,11 +146,11 @@ Stevan Little E<lt>stevan@iinteractive.comE<gt>
 
 =head1 COPYRIGHT AND LICENSE
 
-Copyright 2006 by Infinity Interactive, Inc.
+Copyright 2006-2008 by Infinity Interactive, Inc.
 
 L<http://www.iinteractive.com>
 
 This library is free software; you can redistribute it and/or modify
 it under the same terms as Perl itself. 
 
-=cut
\ No newline at end of file
+=cut