Always load Mouse::Util first, which will be load Mouse::XS in the future

[gitmo/Mouse.git] / lib / Mouse / Meta / TypeConstraint.pm

diff --git a/lib/Mouse/Meta/TypeConstraint.pm b/lib/Mouse/Meta/TypeConstraint.pm
index 7b584bf..916acc1 100644 (file)
--- a/lib/Mouse/Meta/TypeConstraint.pm
+++ b/lib/Mouse/Meta/TypeConstraint.pm
@@ -1,9 +1,14 @@
 package Mouse::Meta::TypeConstraint;
 use strict;
 use warnings;
+
 use overload '""'     => sub { shift->{name} },   # stringify to tc name
              fallback => 1;
 
+use Carp ();
+
+use Mouse::Util ();
+
 sub new {
     my $class = shift;
     my %args = @_;
@@ -14,7 +19,11 @@ sub new {
         $check = $check->{_compiled_type_constraint};
     }
 
-    bless +{ name => $name, _compiled_type_constraint => $check }, $class;
+    bless +{
+        name                      => $name,
+        _compiled_type_constraint => $check,
+        message                   => $args{message}
+    }, $class;
 }
 
 sub name { shift->{name} }
@@ -24,6 +33,52 @@ sub check {
     $self->{_compiled_type_constraint}->(@_);
 }
 
+sub validate {
+    my ($self, $value) = @_;\r
+    if ($self->{_compiled_type_constraint}->($value)) {\r
+        return undef;\r
+    }\r
+    else {\r
+        $self->get_message($value);\r
+    }\r
+}
+
+sub assert_valid {\r
+    my ($self, $value) = @_;\r
+\r
+    my $error = $self->validate($value);\r
+    return 1 if ! defined $error;\r
+
+    Carp::confess($error);\r
+}\r
+
+
+sub message {
+    return $_[0]->{message};
+}
+
+sub get_message {
+    my ($self, $value) = @_;
+    if ( my $msg = $self->message ) {
+        local $_ = $value;
+        return $msg->($value);
+    }
+    else {
+        $value = ( defined $value ? overload::StrVal($value) : 'undef' );
+        return
+            "Validation failed for '"
+          . $self->name
+          . "' failed with value $value";
+    }
+}
+
+sub is_a_type_of{
+    my($self, $tc_name) = @_;
+
+    return $self->name eq $tc_name
+        || $self->name =~ /\A $tc_name \[/xms; # "ArrayRef" =~ "ArrayRef[Foo]"
+}
+
 1;
 __END__