X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=lib%2FMouse%2FUtil%2FTypeConstraints.pm;h=38961822f2d169ba2443dfeb5c0ab850c72fbe8f;hb=939c3d875f956f33b2c351c951fdd1dc125f196c;hp=2b2d558c4f04efe7f795e1050a91661a6412a1cc;hpb=f152b0997e523b60b2dbcefff8d102fc1096bf49;p=gitmo%2FMouse.git

diff --git a/lib/Mouse/Util/TypeConstraints.pm b/lib/Mouse/Util/TypeConstraints.pm
index 2b2d558..3896182 100644
--- a/lib/Mouse/Util/TypeConstraints.pm
+++ b/lib/Mouse/Util/TypeConstraints.pm
@@ -11,7 +11,11 @@ Mouse::Exporter->setup_import_methods(
     as_is => [qw(
         as where message optimize_as
         from via
-        type subtype coerce class_type role_type enum
+
+        type subtype class_type role_type duck_type
+        enum
+        coerce
+
         find_type_constraint
     )],
 );
@@ -95,9 +99,7 @@ sub _create_type{
     }
 
     if(!defined $name){
-        if(!defined($name = $args{name})){
-            $name = '__ANON__';
-        }
+        $name = $args{name};
     }
 
     $args{name} = $name;
@@ -106,16 +108,20 @@ sub _create_type{
         $parent = delete $args{as};
         if(!$parent){
             $parent = delete $args{name};
-            $name   = '__ANON__';
+            $name   = undef;
         }
     }
 
-    my $package_defined_in = $args{package_defined_in} ||= caller(1);
-
-    my $existing = $TYPE{$name};
-    if($existing && $existing->{package_defined_in} ne $package_defined_in){
-        confess("The type constraint '$name' has already been created in "
-              . "$existing->{package_defined_in} and cannot be created again in $package_defined_in");
+    if(defined $name){
+        my $package_defined_in = $args{package_defined_in} ||= caller(1);
+        my $existing = $TYPE{$name};
+        if($existing && $existing->{package_defined_in} ne $package_defined_in){
+            confess("The type constraint '$name' has already been created in "
+                  . "$existing->{package_defined_in} and cannot be created again in $package_defined_in");
+        }
+    }
+    else{
+        $args{name} = '__ANON__';
     }
 
     $args{constraint} = delete $args{where}        if exists $args{where};
@@ -129,7 +135,12 @@ sub _create_type{
         $constraint = Mouse::Meta::TypeConstraint->new(%args);
     }
 
-    return $TYPE{$name} = $constraint;
+    if(defined $name){
+        return $TYPE{$name} = $constraint;
+    }
+    else{
+        return $constraint;
+    }
 }
 
 sub type {
@@ -172,13 +183,20 @@ sub role_type {
     );
 }
 
-sub typecast_constraints { # DEPRECATED
-    my($class, $pkg, $type, $value) = @_;
-    Carp::croak("wrong arguments count") unless @_ == 4;
+sub duck_type {
+    my($name, @methods);
+
+    if(!(@_ == 1 && ref($_[0]) eq 'ARRAY')){
+        $name = shift;
+    }
 
-    Carp::cluck("typecast_constraints() has been deprecated, which was an internal utility anyway");
+    @methods = (@_ == 1 && ref($_[0]) eq 'ARRAY') ? @{$_[0]} : @_;
 
-    return $type->coerce($value);
+    return _create_type 'type', $name => (
+        optimized_as => Mouse::Util::generate_can_predicate_for(\@methods),
+
+        type => 'DuckType',
+    );
 }
 
 sub enum {
@@ -346,7 +364,7 @@ Mouse::Util::TypeConstraints - Type constraint system for Mouse
 
 =head1 VERSION
 
-This document describes Mouse version 0.43
+This document describes Mouse version 0.4501
 
 =head2 SYNOPSIS
 
@@ -519,16 +537,26 @@ Returns the names of all the type constraints.
 
 =over 4
 
-=item C<< subtype 'Name' => as 'Parent' => where { } ... -> Mouse::Meta::TypeConstraint >>
+=item C<< type $name => where { } ... -> Mouse::Meta::TypeConstraint >>
 
-=item C<< subtype as 'Parent' => where { } ...  -> Mouse::Meta::TypeConstraint >>
+=item C<< subtype $name => as $parent => where { } ... -> Mouse::Meta::TypeConstraint >>
+
+=item C<< subtype as $parent => where { } ...  -> Mouse::Meta::TypeConstraint >>
 
 =item C<< class_type ($class, ?$options) -> Mouse::Meta::TypeConstraint >>
 
 =item C<< role_type ($role, ?$options) -> Mouse::Meta::TypeConstraint >>
 
+=item C<< duck_type($name, @methods | \@methods) -> Mouse::Meta::TypeConstraint >>
+
+=item C<< duck_type(\@methods) -> Mouse::Meta::TypeConstraint >>
+
+=item C<< enum($name, @values | \@values) -> Mouse::Meta::TypeConstraint >>
+
 =item C<< enum (\@values) -> Mouse::Meta::TypeConstraint >>
 
+=item C<< coerce $type => from $another_type, via { }, ... >>
+
 =back
 
 =over 4