added Mouse::Meta::TypeConstraint and use it. Mouse::Meta::Attribute->type_constraint...

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

diff --git a/lib/Mouse/Meta/Attribute.pm b/lib/Mouse/Meta/Attribute.pm
index ab72881..4344c27 100644 (file)
--- a/lib/Mouse/Meta/Attribute.pm
+++ b/lib/Mouse/Meta/Attribute.pm
@@ -5,6 +5,7 @@ require overload;
 
 use Carp 'confess';
 use Scalar::Util ();
+use Mouse::Meta::TypeConstraint;
 
 sub new {
     my ($class, $name, %options) = @_;
@@ -36,7 +37,6 @@ sub trigger              { $_[0]->{trigger}                }
 sub builder              { $_[0]->{builder}                }
 sub should_auto_deref    { $_[0]->{auto_deref}             }
 sub should_coerce        { $_[0]->{should_coerce}          }
-sub find_type_constraint { $_[0]->{find_type_constraint}   }
 
 sub has_default          { exists $_[0]->{default}         }
 sub has_predicate        { exists $_[0]->{predicate}       }
@@ -63,7 +63,7 @@ sub generate_accessor {
 
     my $name          = $attribute->name;
     my $default       = $attribute->default;
-    my $constraint    = $attribute->find_type_constraint;
+    my $constraint    = $attribute->type_constraint;
     my $builder       = $attribute->builder;
     my $trigger       = $attribute->trigger;
     my $is_weak       = $attribute->is_weak_ref;
@@ -73,23 +73,31 @@ sub generate_accessor {
     my $self  = '$_[0]';
     my $key   = $attribute->inlined_name;
 
-    my $accessor = "sub {\n";
+    my $accessor = 
+        '#line ' . __LINE__ . ' "' . __FILE__ . "\"\n" .
+        "sub {\n";
     if ($attribute->_is_metadata eq 'rw') {
-        $accessor .= 'if (scalar(@_) >= 2) {' . "\n";
+        $accessor .= 
+            '#line ' . __LINE__ . ' "' . __FILE__ . "\"\n" .
+            'if (@_ >= 2) {' . "\n";
 
         my $value = '$_[1]';
 
         if ($constraint) {
             $accessor .= 'my $val = ';
             if ($should_coerce) {
-                $accessor  .= 'Mouse::Util::TypeConstraints->typecast_constraints("'.$attribute->associated_class->name.'", $attribute->{find_type_constraint}, $attribute->{type_constraint}, '.$value.');';
+                $accessor .=
+                    "\n".
+                    '#line ' . __LINE__ . ' "' . __FILE__ . "\"\n" .
+                    'Mouse::Util::TypeConstraints->typecast_constraints("'.$attribute->associated_class->name.'", $attribute->{type_constraint}, '.$value.');';
             } else {
                 $accessor .= $value.';';
             }
-            $accessor .= 'local $_ = $val;';
-            $accessor .= '
-                unless ($constraint->()) {
-                    $attribute->verify_type_constraint_error($name, $_, $attribute->type_constraint);
+            $accessor .= 
+                "\n".
+                '#line ' . __LINE__ . ' "' . __FILE__ . "\"\n" .
+                'unless ($constraint->check($val)) {
+                    $attribute->verify_type_constraint_error($name, $val, $attribute->{type_constraint});
                 }' . "\n";
             $value = '$val';
         }
@@ -105,7 +113,7 @@ sub generate_accessor {
         }
 
         if ($trigger) {
-            $accessor .= '$trigger->('.$self.', '.$value.', $attribute);' . "\n";
+            $accessor .= '$trigger->('.$self.', '.$value.');' . "\n";
         }
 
         $accessor .= "}\n";
@@ -126,8 +134,8 @@ sub generate_accessor {
     }
 
     if ($should_deref) {
-        my $type_constraint = $attribute->type_constraint;
-        if (!ref($type_constraint) && $type_constraint eq 'ArrayRef') {
+        my $type_constraint = $attribute->{type_constraint};
+        if (ref($type_constraint) && $type_constraint->name eq 'ArrayRef') {
             $accessor .= 'if (wantarray) {
                 return @{ '.$self.'->{'.$key.'} || [] };
             }';
@@ -204,31 +212,15 @@ sub create {
         if exists $args{coerce};
 
     if (exists $args{isa}) {
+        confess "Got isa => $args{isa}, but Mouse does not yet support parameterized types for containers other than ArrayRef and HashRef (rt.cpan.org #39795)"
+            if $args{isa} =~ /^([^\[]+)\[.+\]$/ &&
+               $1 ne 'ArrayRef' &&
+               $1 ne 'HashRef'  &&
+               $1 ne 'Maybe'
+        ;
+
         my $type_constraint = delete $args{isa};
-        $type_constraint =~ s/\s//g;
-        my @type_constraints = split /\|/, $type_constraint;
-
-        my $code;
-        my $optimized_constraints = Mouse::Util::TypeConstraints->optimized_constraints;
-        if (@type_constraints == 1) {
-            $code = $optimized_constraints->{$type_constraints[0]} ||
-                sub { Scalar::Util::blessed($_) && $_->isa($type_constraints[0]) };
-            $args{type_constraint} = $type_constraints[0];
-        } else {
-            my @code_list = map {
-                my $type = $_;
-                $optimized_constraints->{$type} ||
-                    sub { Scalar::Util::blessed($_) && $_->isa($type) }
-            } @type_constraints;
-            $code = sub {
-                for my $code (@code_list) {
-                    return 1 if $code->();
-                }
-                return 0;
-            };
-            $args{type_constraint} = \@type_constraints;
-        }
-        $args{find_type_constraint} = $code;
+        $args{type_constraint}= Mouse::Util::TypeConstraints::find_or_create_isa_type_constraint($type_constraint);
     }
 
     my $attribute = $self->new($name, %args);
@@ -326,23 +318,23 @@ sub verify_against_type_constraint {
     return 1 unless $_[0]->{type_constraint};
 
     local $_ = $_[1];
-    return 1 if $_[0]->{find_type_constraint}->($_);
+    return 1 if $_[0]->{type_constraint}->check($_);
 
     my $self = shift;
-    $self->verify_type_constraint_error($self->name, $_, $self->type_constraint);
+    $self->verify_type_constraint_error($self->name, $_, $self->{type_constraint});
 }
 
 sub verify_type_constraint_error {
     my($self, $name, $value, $type) = @_;
-    $type = ref($type) eq 'ARRAY' ? join '|', @{ $type } : $type;
-    my $display = defined($_) ? overload::StrVal($_) : 'undef';
+    $type = ref($type) eq 'ARRAY' ? join '|', map { $_->name } @{ $type } : $type->name;
+    my $display = defined($value) ? overload::StrVal($value) : 'undef';
     Carp::confess("Attribute ($name) does not pass the type constraint because: Validation failed for \'$type\' failed with value $display");
 }
 
 sub coerce_constraint { ## my($self, $value) = @_;
     my $type = $_[0]->{type_constraint}
         or return $_[1];
-    return Mouse::Util::TypeConstraints->typecast_constraints($_[0]->associated_class->name, $_[0]->find_type_constraint, $type, $_[1]);
+    return Mouse::Util::TypeConstraints->typecast_constraints($_[0]->associated_class->name, $_[0]->type_constraint, $_[1]);
 }
 
 sub _canonicalize_handles {
@@ -464,11 +456,6 @@ Creates a new code reference for the attribute's clearer.
 
 Creates a new code reference for each of the attribute's handles methods.
 
-=head2 find_type_constraint -> CODE
-
-Returns a code reference which can be used to check that a given value passes
-this attribute's type constraint;
-
 =head2 verify_against_type_constraint Item -> 1 | ERROR
 
 Checks that the given value passes this attribute's type constraint. Returns 1