X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=lib%2FMoose%2FMeta%2FTypeConstraint.pm;h=1ec67a2cd86d224a766044751b80910b109d1ff5;hb=4a315f4b0c6b14bffc21f3337127c6335b7ec15f;hp=559ef20fe2a4d5dcac1342ee8b53cdea64d87fa2;hpb=02679ba41a58922580fbbfea3690670bc1062589;p=gitmo%2FMoose.git

diff --git a/lib/Moose/Meta/TypeConstraint.pm b/lib/Moose/Meta/TypeConstraint.pm
index 559ef20..1ec67a2 100644
--- a/lib/Moose/Meta/TypeConstraint.pm
+++ b/lib/Moose/Meta/TypeConstraint.pm
@@ -5,14 +5,17 @@ use strict;
 use warnings;
 use metaclass;
 
-use overload '""'     => sub { shift->name },   # stringify to tc name
+use overload '0+'     => sub { refaddr(shift) }, # id an object
+             '""'     => sub { shift->name },   # stringify to tc name
+             bool     => sub { 1 },
              fallback => 1;
 
 use Scalar::Util qw(blessed refaddr);
+use Sub::Name qw(subname);
 
 use base qw(Class::MOP::Object);
 
-our $VERSION   = '0.75_01';
+our $VERSION   = '1.19';
 $VERSION = eval $VERSION;
 our $AUTHORITY = 'cpan:STEVAN';
 
@@ -87,6 +90,25 @@ sub coerce {
     return $coercion->coerce(@_);
 }
 
+sub assert_coerce {
+    my $self = shift;
+
+    my $coercion = $self->coercion;
+
+    unless ($coercion) {
+        require Moose;
+        Moose->throw_error("Cannot coerce without a type coercion");
+    }
+
+    return $_[0] if $self->check($_[0]);
+
+    my $result = $coercion->coerce(@_);
+
+    $self->assert_valid($result);
+
+    return $result;
+}
+
 sub check {
     my ($self, @args) = @_;
     my $constraint_subref = $self->_compiled_type_constraint;
@@ -103,6 +125,16 @@ sub validate {
     }
 }
 
+sub assert_valid {
+    my ($self, $value) = @_;
+
+    my $error = $self->validate($value);
+    return 1 if ! defined $error;
+
+    require Moose;
+    Moose->throw_error($error);
+}
+
 sub get_message {
     my ($self, $value) = @_;
     if (my $msg = $self->message) {
@@ -110,9 +142,9 @@ sub get_message {
         return $msg->($value);
     }
     else {
-        $value = (defined $value ? overload::StrVal($value) : 'undef');        
-        return "Validation failed for '" . $self->name . "' failed with value $value";
-    }    
+        $value = (defined $value ? overload::StrVal($value) : 'undef');
+        return "Validation failed for '" . $self->name . "' with value $value";
+    }
 }
 
 ## type predicates ...
@@ -122,7 +154,7 @@ sub equals {
 
     my $other = Moose::Util::TypeConstraints::find_type_constraint($type_or_name) or return;
 
-    return 1 if refaddr($self) == refaddr($other);
+    return 1 if $self == $other;
 
     if ( $self->has_hand_optimized_type_constraint and $other->has_hand_optimized_type_constraint ) {
         return 1 if $self->hand_optimized_type_constraint == $other->hand_optimized_type_constraint;
@@ -137,7 +169,7 @@ sub equals {
         return if $other->has_parent;
     }
 
-    return 1;
+    return;
 }
 
 sub is_a_type_of {
@@ -234,7 +266,7 @@ sub _compile_subtype {
         if ( $check == $null_constraint ) {
             return $optimized_parent;
         } else {
-            return Class::MOP::subname($self->name, sub {
+            return subname($self->name, sub {
                 return undef unless $optimized_parent->($_[0]);
                 my (@args) = @_;
                 local $_ = $args[0];
@@ -245,7 +277,7 @@ sub _compile_subtype {
         # general case, check all the constraints, from the first parent to ourselves
         my @checks = @parents;
         push @checks, $check if $check != $null_constraint;
-        return Class::MOP::subname($self->name => sub {
+        return subname($self->name => sub {
             my (@args) = @_;
             local $_ = $args[0];
             foreach my $check (@checks) {
@@ -261,7 +293,7 @@ sub _compile_type {
 
     return $check if $check == $null_constraint; # Item, Any
 
-    return Class::MOP::subname($self->name => sub {
+    return subname($self->name => sub {
         my (@args) = @_;
         local $_ = $args[0];
         $check->(@args);
@@ -300,7 +332,7 @@ Moose::Meta::TypeConstraint - The Moose Type Constraint metaclass
 =head1 DESCRIPTION
 
 This class represents a single type constraint. Moose's built-in type
-constraints, as well as constraints you define, are all store in a
+constraints, as well as constraints you define, are all stored in a
 L<Moose::Meta::TypeConstraint::Registry> object as objects of this
 class.
 
@@ -370,9 +402,17 @@ C<equals> and C<is_subtype_of>.
 
 =item B<< $constraint->coerce($value) >>
 
-This will attempt to coerce the value to the type. If the type does
+This will attempt to coerce the value to the type. If the type does not
 have any defined coercions this will throw an error.
 
+If no coercion can produce a value matching C<$constraint>, the original
+value is returned.
+
+=item B<< $constraint->assert_coerce($value) >>
+
+This method behaves just like C<coerce>, but if the result is not valid
+according to C<$constraint>, an error is thrown.
+
 =item B<< $constraint->check($value) >>
 
 Returns true if the given value passes the constraint for the type.
@@ -384,6 +424,13 @@ method returns an explicit C<undef>. If the type is not valid, we call
 C<< $self->get_message($value) >> internally to generate an error
 message.
 
+=item B<< $constraint->assert_valid($value) >>
+
+Like C<check> and C<validate>, this method checks whether C<$value> is
+valid under the constraint.  If it is, it will return true.  If it is not,
+an exception will be thrown with the results of
+C<< $self->get_message($value) >>.
+
 =item B<< $constraint->name >>
 
 Returns the type's name, as provided to the constructor.
@@ -448,9 +495,7 @@ behavior and change how child types are created.
 
 =head1 BUGS
 
-All complex software has bugs lurking in it, and this module is no
-exception. If you find a bug please either email me, or add the bug
-to cpan-RT.
+See L<Moose/BUGS> for details on reporting bugs.
 
 =head1 AUTHOR
 
@@ -458,7 +503,7 @@ Stevan Little E<lt>stevan@iinteractive.comE<gt>
 
 =head1 COPYRIGHT AND LICENSE
 
-Copyright 2006-2009 by Infinity Interactive, Inc.
+Copyright 2006-2010 by Infinity Interactive, Inc.
 
 L<http://www.iinteractive.com>