X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=lib%2FMooseX%2FMeta%2FTypeConstraint%2FStructured%2FNamed.pm;h=bcbc9962fdac1876dd3856082e450b7651484ede;hb=67be6b65eafdcc510a27f502aaad8070dc0674b3;hp=837cf3476254aa114c41d60b340ea8007985f92b;hpb=bc5c0758d92c58286c4ba66a613850492525d752;p=gitmo%2FMooseX-Types-Structured.git

diff --git a/lib/MooseX/Meta/TypeConstraint/Structured/Named.pm b/lib/MooseX/Meta/TypeConstraint/Structured/Named.pm
index 837cf34..bcbc996 100644
--- a/lib/MooseX/Meta/TypeConstraint/Structured/Named.pm
+++ b/lib/MooseX/Meta/TypeConstraint/Structured/Named.pm
@@ -2,7 +2,6 @@ package MooseX::Meta::TypeConstraint::Structured::Named;
 
 use Moose;
 use Moose::Meta::TypeConstraint ();
-use Moose::Util::TypeConstraints;
 
 extends 'Moose::Meta::TypeConstraint';
 with 'MooseX::Meta::TypeConstraint::Role::Structured';
@@ -11,41 +10,34 @@ with 'MooseX::Meta::TypeConstraint::Role::Structured';
 
 MooseX::Meta::TypeConstraint::Structured::Named - Structured Type Constraints
 
-=head1 VERSION
+=head1 SYNOPSIS
 
-0.01
+The follow is example usage:
 
-=cut
-
-our $VERSION = '0.01';
+    use Moose::Util::TypeConstraints;
+    use MooseX::Meta::TypeConstraint::Structured::Named;
+    
+    my %required = (key1='Str', key2=>'Int');
+    my %optional = (key3=>'Object');
+    
+    my $tc = MooseX::Meta::TypeConstraint::Structured::Named->new(
+        name => 'Dict',
+        parent => find_type_constraint('HashRef'),
+        package_defined_in => __PACKAGE__,
+        signature => {map {
+            $_ => find_type_constraint($required{$_});
+        } keys %required},
+        optional_signature => {map {
+            $_ => find_type_constraint($optional{$_});
+        } keys %optional},
+    );
 
 =head1 DESCRIPTION
 
-Structured type constraints let you assign an internal pattern of type
-constraints to a 'container' constraint.  The goal is to make it easier to
-declare constraints like "ArrayRef[Int, Int, Str]" where the constraint is an
-ArrayRef of three elements and the internal constraint on the three is Int, Int
-and Str.
-
-To accomplish this, we add an attribute to the base L<Moose::Meta::TypeConstraint>
-to hold a L</signature>, which is a reference to a pattern of type constraints.
-We then override L</constraint> to check our incoming value to the attribute
-against this signature pattern.
-
 Named structured Constraints expect the internal constraints to be in keys or
-fields similar to what we expect in a HashRef.
-
-=head1 TYPES
-
-The following types are defined in this class.
-
-=head2 Moose::Meta::TypeConstraint
-
-Used to make sure we can properly validate incoming signatures.
-
-=cut
-
-class_type 'Moose::Meta::TypeConstraint';
+fields similar to what we expect in a HashRef.  Basically, this allows you to
+easily add type constraint checks against values in the wrapping HashRef
+identified by the key name.
 
 =head1 ATTRIBUTES
 
@@ -58,9 +50,7 @@ contraint container.
 
 =cut
 
-has '+signature' => (
-    isa=>'HashRef[Moose::Meta::TypeConstraint]',
-);
+has '+signature' => (isa=>'HashRef[Moose::Meta::TypeConstraint]');
 
 =head2 optional_signature
 
@@ -69,11 +59,7 @@ contraint container.  These are optional constraints.
 
 =cut
 
-has 'optional_signature' => (
-    is=>'ro',
-    isa=>'HashRef[Moose::Meta::TypeConstraint]',
-    predicate=>'has_optional_signature',
-);
+has '+optional_signature' => (isa=>'HashRef[Moose::Meta::TypeConstraint]');
 
 =head1 METHODS
 
@@ -109,22 +95,26 @@ sub constraint {
     my $self = shift;
     return sub {
         my %args = $self->_normalize_args(shift);
-        my @signature = keys %{$self->signature};
-        my @ptional_signature = keys %{$self->optional_signature}
-         if $self->has_optional_signature;
+        my @optional_signature;
+        
+        if($signature[-1]->isa('MooseX::Meta::TypeConstraint::Structured::Optional')) {
+            my $optional = pop @signature;
+            @optional_signature = @{$optional->signature};
+        }
         
         ## First make sure all the required type constraints match        
-        while( my $type_constraint_key = shift @signature) {
-            my $type_constraint = $self->signature->{$type_constraint_key};
-            if(my $error = $type_constraint->validate($args{$type_constraint_key})) {
+        foreach my $sig_key (keys %{$self->signature}) {
+            my $type_constraint = $self->signature->{$sig_key};
+            if(my $error = $type_constraint->validate($args{$sig_key})) {
                 confess $error;
+            } else {
+                delete $args{$sig_key};
             }
-            delete $args{$type_constraint_key};
         }
         
         ## Now test the option type constraints.
-        while( my $arg_key = keys %args) {
-            my $optional_type_constraint = $self->signature->{$arg_key};
+        foreach my $arg_key (keys %args) {
+            my $optional_type_constraint = $self->optional_signature->{$arg_key};
             if(my $error = $optional_type_constraint->validate($args{$arg_key})) {
                 confess $error;
             }              
@@ -161,27 +151,7 @@ sub signature_equals {
     return 1;
 }
 
-=head2 equals
-
-modifier to make sure equals descends into the L</signature>
 
-=cut
-
-around 'equals' => sub {
-    my ($equals, $self, $compared_type_constraint) = @_;
-    
-    ## Make sure we are comparing typeconstraints of the same base class
-    return unless $compared_type_constraint->isa(__PACKAGE__);
-    
-    ## Make sure the base equals is also good
-    return unless $self->$equals($compared_type_constraint);
-    
-    ## Make sure the signatures match
-    return unless $self->signature_equals($compared_type_constraint);
-   
-    ## If we get this far, the two are equal
-    return 1;
-};
 
 =head1 AUTHOR