use warnings;
use metaclass;
-use Sub::Name 'subname';
-use Carp 'confess';
+#use overload '""' => sub { shift->name }, # stringify to tc name
+# fallback => 1;
-our $VERSION = '0.02';
+use Sub::Name 'subname';
+use Carp 'confess';
+use Scalar::Util 'blessed';
-__PACKAGE__->meta->add_attribute('name' => (reader => 'name' ));
-__PACKAGE__->meta->add_attribute('parent' => (reader => 'parent' ));
-__PACKAGE__->meta->add_attribute('constraint' => (reader => 'constraint'));
+our $VERSION = '0.10';
+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'
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',
+));
+
+# private accessors
-# private accessor
__PACKAGE__->meta->add_attribute('compiled_type_constraint' => (
- accessor => '_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 {
+sub new {
my $class = shift;
my $self = $class->meta->new_object(@_);
- $self->compile_type_constraint();
+ $self->compile_type_constraint()
+ unless $self->_has_compiled_type_constraint;
return $self;
}
-sub compile_type_constraint () {
- my $self = shift;
- my $check = $self->constraint;
- (defined $check)
- || confess "Could not compile type constraint '" . $self->name . "' because no constraint check";
- my $parent = $self->parent;
- if (defined $parent) {
- # we have a subtype ...
- $parent = $parent->_compiled_type_constraint;
- $self->_compiled_type_constraint(subname $self->name => sub {
- local $_ = $_[0];
- return undef unless defined $parent->($_[0]) && $check->($_[0]);
- $_[0];
- });
- }
- else {
- # we have a type ....
- $self->_compiled_type_constraint(subname $self->name => sub {
- local $_ = $_[0];
- return undef unless $check->($_[0]);
- $_[0];
- });
- }
-}
-
-sub check { $_[0]->_compiled_type_constraint->($_[1]) }
-
-sub validate {
+sub coerce { ((shift)->coercion || confess "Cannot coerce without a type coercion")->coerce(@_) }
+sub check { $_[0]->_compiled_type_constraint->($_[1]) }
+sub validate {
my ($self, $value) = @_;
if ($self->_compiled_type_constraint->($value)) {
return undef;
return $self->message->($value);
}
else {
- return "Validation failed for '" . $self->name . "' failed.";
+ return "Validation failed for '" . $self->name . "' failed";
+ }
+ }
+}
+
+## type predicates ...
+
+sub is_a_type_of {
+ my ($self, $type_name) = @_;
+ ($self->name eq $type_name || $self->is_subtype_of($type_name));
+}
+
+sub is_subtype_of {
+ my ($self, $type_name) = @_;
+ my $current = $self;
+ while (my $parent = $current->parent) {
+ return 1 if $parent->name eq $type_name;
+ $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;
+
+ return sub {
+ confess unless ref $type_constraint;
+ return undef unless $type_constraint->($_[0]);
+ return 1;
+ };
+}
+
+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 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 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 = $current->parent;
+ }
+ return @parents;
}
+## this should get deprecated actually ...
+
+sub union { die "DEPRECATED" }
+
1;
__END__
=head1 DESCRIPTION
-For the most part, the only time you will ever encounter an
-instance of this class is if you are doing some serious deep
-introspection. This API should not be considered final, but
-it is B<highly unlikely> that this will matter to a regular
+For the most part, the only time you will ever encounter an
+instance of this class is if you are doing some serious deep
+introspection. This API should not be considered final, but
+it is B<highly unlikely> that this will matter to a regular
Moose user.
-If you wish to use features at this depth, please come to the
+If you wish to use features at this depth, please come to the
#moose IRC channel on irc.perl.org and we can talk :)
=head1 METHODS
=item B<new>
+=item B<is_a_type_of ($type_name)>
+
+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 ($type_name)>
+
=item B<compile_type_constraint>
+=item B<coerce ($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
+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.
+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<parent>
+=item B<has_parent>
+
=item B<constraint>
=item B<has_message>
=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