Add coerce() to the function list

[gitmo/Mouse.git] / lib / Mouse / Util / TypeConstraints.pm

diff --git a/lib/Mouse/Util/TypeConstraints.pm b/lib/Mouse/Util/TypeConstraints.pm
index 2b2d558..a3645e1 100644 (file)
--- 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
     )],
 );
@@ -172,6 +176,22 @@ sub role_type {
     );
 }
 
+sub duck_type {
+    my($name, @methods);
+
+    if(!(@_ == 1 && ref($_[0]) eq 'ARRAY')){
+        $name = shift;
+    }
+
+    @methods = (@_ == 1 && ref($_[0]) eq 'ARRAY') ? @{$_[0]} : @_;
+
+    return _create_type 'type', $name => (
+        optimized_as => Mouse::Util::generate_can_predicate_for(\@methods),
+
+        type => 'DuckType',
+    );
+}
+
 sub typecast_constraints { # DEPRECATED
     my($class, $pkg, $type, $value) = @_;
     Carp::croak("wrong arguments count") unless @_ == 4;
@@ -519,16 +539,26 @@ 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 $name => as $parent => where { } ... -> Mouse::Meta::TypeConstraint >>
 
-=item C<< subtype 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