-package MooseX::Meta::TypeConstraint::Structured;
+package ## Hide from PAUSE
+ MooseX::Meta::TypeConstraint::Structured;
use Moose;
+use Devel::PartialDump;
use Moose::Util::TypeConstraints ();
use MooseX::Meta::TypeCoercion::Structured;
extends 'Moose::Meta::TypeConstraint';
=cut
-has 'constraint_generator' => (is=>'ro', isa=>'CodeRef');
+has 'constraint_generator' => (
+ is=>'ro',
+ isa=>'CodeRef',
+ predicate=>'has_constraint_generator',
+);
=head1 METHODS
sub generate_constraint_for {
my ($self, $type_constraints) = @_;
return sub {
+ my (@args) = @_;
my $constraint_generator = $self->constraint_generator;
- return $constraint_generator->($type_constraints, @_);
+ return $constraint_generator->($type_constraints, @args);
};
}
=cut
sub parameterize {
+
my ($self, @type_constraints) = @_;
my $class = ref $self;
my $name = $self->name .'['. join(',', map {"$_"} @type_constraints) .']';
+ my $constraint_generator = $self->__infer_constraint_generator;
return $class->new(
name => $name,
parent => $self,
type_constraints => \@type_constraints,
- constraint_generator => $self->constraint_generator || sub {
+ constraint_generator => $constraint_generator,
+ );
+}
+
+=head2 __infer_constraint_generator
+
+This returns a CODEREF which generates a suitable constraint generator. Not
+user servicable, you'll never call this directly.
+
+=cut
+
+sub __infer_constraint_generator {
+ my ($self) = @_;
+ if($self->has_constraint_generator) {
+ return $self->constraint_generator;
+ } else {
+ return sub {
+ ## I'm not sure about this stuff but everything seems to work
my $tc = shift @_;
my $merged_tc = [@$tc, @{$self->parent->type_constraints}];
- $self->constraint->($merged_tc, @_);
- },
- );
+ $self->constraint->($merged_tc, @_);
+ };
+ }
}
=head2 compile_type_constraint
my ($create_child_type, $self, %opts) = @_;
return $self->$create_child_type(
%opts,
- constraint_generator => $self->constraint_generator,
+ constraint_generator => $self->__infer_constraint_generator,
);
};
=head2 get_message
-May want to override this to set a more useful error message
+Give you a better peek into what's causing the error. For now we stringify the
+incoming deep value with L<Devel::PartialDump> and pass that on to either your
+custom error message or the default one. In the future we'll try to provide a
+more complete stack trace of the actual offending elements
+
+=cut
+
+around 'get_message' => sub {
+ my ($get_message, $self, $value) = @_;
+ my $new_value = Devel::PartialDump::dump($value);
+ return $self->$get_message($new_value);
+};
=head1 SEE ALSO
=cut
-1;
\ No newline at end of file
+__PACKAGE__->meta->make_immutable;
\ No newline at end of file