Implement compile_type_constraint in XS

[gitmo/Mouse.git] / lib / Mouse / PurePerl.pm

diff --git a/lib/Mouse/PurePerl.pm b/lib/Mouse/PurePerl.pm
index 32616b0..9b67e30 100644 (file)
--- a/lib/Mouse/PurePerl.pm
+++ b/lib/Mouse/PurePerl.pm
@@ -282,6 +282,55 @@ sub _compiled_type_coercion  { $_[0]->{_compiled_type_coercion}  }
 
 sub has_coercion{ exists $_[0]->{_compiled_type_coercion} }
 
+
+sub compile_type_constraint{
+    my($self) = @_;
+
+    # add parents first
+    my @checks;
+    for(my $parent = $self->{parent}; defined $parent; $parent = $parent->{parent}){
+         if($parent->{hand_optimized_type_constraint}){
+            unshift @checks, $parent->{hand_optimized_type_constraint};
+            last; # a hand optimized constraint must include all the parents
+        }
+        elsif($parent->{constraint}){
+            unshift @checks, $parent->{constraint};
+        }
+    }
+
+    # then add child
+    if($self->{constraint}){
+        push @checks, $self->{constraint};
+    }
+
+    if($self->{type_constraints}){ # Union
+        my @types = map{ $_->{compiled_type_constraint} } @{ $self->{type_constraints} };
+        push @checks, sub{
+            foreach my $c(@types){
+                return 1 if $c->($_[0]);
+            }
+            return 0;
+        };
+    }
+
+    if(@checks == 0){
+        $self->{compiled_type_constraint} = \&Mouse::Util::TypeConstraints::Any;
+    }
+    else{
+        $self->{compiled_type_constraint} =  sub{
+            my(@args) = @_;
+            local $_ = $args[0];
+            foreach my $c(@checks){
+                return undef if !$c->(@args);
+            }
+            return 1;
+        };
+    }
+    return;
+}
+
+
+
 1;
 __END__