use warnings;
use metaclass;
-Moose::Meta::TypeConstraint->meta->add_attribute(
- Class::MOP::Attribute->new('name' => (
- reader => 'name'
- ))
-);
-
-Moose::Meta::TypeConstraint->meta->add_attribute(
- Class::MOP::Attribute->new('constraint_code' => (
- reader => 'constraint_code'
- ))
-);
-
-Moose::Meta::TypeConstraint->meta->add_attribute(
- Class::MOP::Attribute->new('coercion_code' => (
- reader => 'coercion_code',
- writer => 'set_coercion_code',
- predicate => 'has_coercion'
- ))
-);
-
-sub new { (shift)->meta->new_object(@_) }
-sub check { (shift)->constraint_code->(@_) }
-sub coerce { (shift)->coercion_code->(@_) }
+use overload '""' => sub { shift->name }, # stringify to tc name
+ fallback => 1;
+
+use Carp 'confess';
+use Scalar::Util qw(blessed refaddr);
+
+our $VERSION = '0.13';
+our $AUTHORITY = 'cpan:STEVAN';
+
+__PACKAGE__->meta->add_attribute('name' => (reader => 'name'));
+__PACKAGE__->meta->add_attribute('parent' => (
+ reader => 'parent',
+ predicate => 'has_parent',
+));
+__PACKAGE__->meta->add_attribute('constraint' => (
+ reader => 'constraint',
+ writer => '_set_constraint',
+ default => sub { sub { 1 } }
+));
+__PACKAGE__->meta->add_attribute('message' => (
+ accessor => 'message',
+ predicate => 'has_message'
+));
+__PACKAGE__->meta->add_attribute('coercion' => (
+ accessor => 'coercion',
+ predicate => 'has_coercion'
+));
+__PACKAGE__->meta->add_attribute('hand_optimized_type_constraint' => (
+ init_arg => 'optimized',
+ accessor => 'hand_optimized_type_constraint',
+ predicate => 'has_hand_optimized_type_constraint',
+));
+
+sub parents {
+ my $self;
+ $self->parent;
+}
+
+# private accessors
+
+__PACKAGE__->meta->add_attribute('compiled_type_constraint' => (
+ accessor => '_compiled_type_constraint',
+ predicate => '_has_compiled_type_constraint'
+));
+__PACKAGE__->meta->add_attribute('package_defined_in' => (
+ accessor => '_package_defined_in'
+));
+
+sub new {
+ my $class = shift;
+ my $self = $class->meta->new_object(@_);
+ $self->compile_type_constraint()
+ unless $self->_has_compiled_type_constraint;
+ return $self;
+}
+
+sub coerce { ((shift)->coercion || confess "Cannot coerce without a type coercion")->coerce(@_) }
+sub check { $_[0]->_compiled_type_constraint->($_[1]) ? 1 : undef }
+sub validate {
+ my ($self, $value) = @_;
+ if ($self->_compiled_type_constraint->($value)) {
+ return undef;
+ }
+ else {
+ $self->get_message($value);
+ }
+}
+
+sub get_message {
+ my ($self, $value) = @_;
+ $value = (defined $value ? overload::StrVal($value) : 'undef');
+ if (my $msg = $self->message) {
+ local $_ = $value;
+ return $msg->($value);
+ }
+ else {
+ return "Validation failed for '" . $self->name . "' failed with value $value";
+ }
+}
+
+## type predicates ...
+
+sub equals {
+ my ( $self, $type_or_name ) = @_;
+
+ my $other = Moose::Util::TypeConstraints::find_type_constraint($type_or_name);
+
+ return 1 if refaddr($self) == refaddr($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;
+ }
+
+ return unless $self->constraint == $other->constraint;
+
+ if ( $self->has_parent ) {
+ return unless $other->has_parent;
+ return unless $self->parent->equals( $other->parent );
+ } else {
+ return if $other->has_parent;
+ }
+
+ return 1;
+}
+
+sub is_a_type_of {
+ my ($self, $type_or_name) = @_;
+
+ my $type = Moose::Util::TypeConstraints::find_type_constraint($type_or_name);
+
+ ($self->equals($type) || $self->is_subtype_of($type));
+}
+
+sub is_subtype_of {
+ my ($self, $type_or_name) = @_;
+
+ my $type = Moose::Util::TypeConstraints::find_type_constraint($type_or_name);
+
+ my $current = $self;
+
+ while (my $parent = $current->parent) {
+ return 1 if $parent->equals($type);
+ $current = $parent;
+ }
+
+ return 0;
+}
+
+## compiling the type constraint
+
+sub compile_type_constraint {
+ my $self = shift;
+ $self->_compiled_type_constraint($self->_actually_compile_type_constraint);
+}
+
+## type compilers ...
+
+sub _actually_compile_type_constraint {
+ my $self = shift;
+
+ return $self->_compile_hand_optimized_type_constraint
+ if $self->has_hand_optimized_type_constraint;
+
+ my $check = $self->constraint;
+ (defined $check)
+ || confess "Could not compile type constraint '"
+ . $self->name
+ . "' because no constraint check";
+
+ return $self->_compile_subtype($check)
+ if $self->has_parent;
+
+ return $self->_compile_type($check);
+}
+
+sub _compile_hand_optimized_type_constraint {
+ my $self = shift;
+
+ my $type_constraint = $self->hand_optimized_type_constraint;
+
+ confess unless ref $type_constraint;
+
+ return $type_constraint;
+}
+
+sub _compile_subtype {
+ my ($self, $check) = @_;
+
+ # so we gather all the parents in order
+ # and grab their constraints ...
+ my @parents;
+ foreach my $parent ($self->_collect_all_parents) {
+ if ($parent->has_hand_optimized_type_constraint) {
+ unshift @parents => $parent->hand_optimized_type_constraint;
+ last;
+ }
+ else {
+ unshift @parents => $parent->constraint;
+ }
+ }
+
+ # then we compile them to run without
+ # having to recurse as we did before
+ return Class::MOP::subname($self->name => sub {
+ local $_ = $_[0];
+ foreach my $parent (@parents) {
+ return undef unless $parent->($_[0]);
+ }
+ return undef unless $check->($_[0]);
+ 1;
+ });
+}
+
+sub _compile_type {
+ my ($self, $check) = @_;
+ return Class::MOP::subname($self->name => sub {
+ local $_ = $_[0];
+ return undef unless $check->($_[0]);
+ 1;
+ });
+}
+
+## other utils ...
+
+sub _collect_all_parents {
+ my $self = shift;
+ my @parents;
+ my $current = $self->parent;
+ while (defined $current) {
+ push @parents => $current;
+ $current = $current->parent;
+ }
+ return @parents;
+}
+
+## this should get deprecated actually ...
+
+sub union { Carp::croak "DEPRECATED" }
1;
=head1 NAME
-Moose::Meta::TypeConstraint - The Moose Type Constraint metaobject
-
-=head1 SYNOPSIS
+Moose::Meta::TypeConstraint - The Moose Type Constraint metaclass
=head1 DESCRIPTION
+For the most part, the only time you will ever encounter an
+instance of this class is if you are doing some serious deep
+introspection. This API should not be considered final, but
+it is B<highly unlikely> that this will matter to a regular
+Moose user.
+
+If you wish to use features at this depth, please come to the
+#moose IRC channel on irc.perl.org and we can talk :)
+
=head1 METHODS
=over 4
=item B<new>
+=item B<equals ($type_name_or_object)>
+
+=item B<is_a_type_of ($type_name_or_object)>
+
+This checks the current type name, and if it does not match,
+checks if it is a subtype of it.
+
+=item B<is_subtype_of ($type_name_or_object)>
+
+=item B<compile_type_constraint>
+
+=item B<coerce ($value)>
+
+This will apply the type-coercion if applicable.
+
+=item B<check ($value)>
+
+This method will return a true (C<1>) if the C<$value> passes the
+constraint, and false (C<0>) otherwise.
+
+=item B<validate ($value)>
+
+This method is similar to C<check>, but it deals with the error
+message. If the C<$value> passes the constraint, C<undef> will be
+returned. If the C<$value> does B<not> pass the constraint, then
+the C<message> will be used to construct a custom error message.
+
=item B<name>
-=item B<check>
+=item B<parent>
-=item B<coerce>
+=item B<has_parent>
-=item B<coercion_code>
+=item B<parents>
-=item B<set_coercion_code>
+=item B<constraint>
-=item B<constraint_code>
+=item B<has_message>
+
+=item B<message>
+
+=item B<get_message ($value)>
=item B<has_coercion>
+=item B<coercion>
+
+=item B<hand_optimized_type_constraint>
+
+=item B<has_hand_optimized_type_constraint>
+
+=back
+
+=head2 DEPRECATED METHOD
+
+=over 4
+
+=item B<union>
+
+This was just bad idea on my part,.. use the L<Moose::Meta::TypeConstraint::Union>
+itself instead.
+
=back
=head1 BUGS
-All complex software has bugs lurking in it, and this module is no
+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.
=head1 COPYRIGHT AND LICENSE
-Copyright 2006 by Infinity Interactive, Inc.
+Copyright 2006-2008 by Infinity Interactive, Inc.
L<http://www.iinteractive.com>
This library is free software; you can redistribute it and/or modify
-it under the same terms as Perl itself.
+it under the same terms as Perl itself.
-=cut
\ No newline at end of file
+=cut
projects / gitmo/Moose.git / blobdiff