package ## Hide from PAUSE
MooseX::Meta::TypeConstraint::Structured;
+# ABSTRACT: MooseX::Meta::TypeConstraint::Structured - Structured type constraints.
use Moose;
use Devel::PartialDump;
use MooseX::Meta::TypeCoercion::Structured;
extends 'Moose::Meta::TypeConstraint';
-=head1 NAME
-
-MooseX::Meta::TypeConstraint::Structured - Structured type constraints.
=head1 DESCRIPTION
an Int and then a Str" and that this could be done so with a declaration like:
Tuple[Int,Int,Str]; ## Example syntax
-
+
So a structure is a list of Type constraints (the "Int,Int,Str" in the above
example) which are intended to function together.
-=head1 ATTRIBUTES
-
-This class defines the following attributes.
-
-=head2 type_constraints
+=attr type_constraints
A list of L<Moose::Meta::TypeConstraint> objects.
predicate=>'has_type_constraints',
);
-=head2 constraint_generator
+=attr constraint_generator
A subref or closure that contains the way we validate incoming values against
a set of type constraints.
predicate=>'has_constraint_generator',
);
-=head1 METHODS
-
-This class defines the following methods.
-
-=head2 new
-
-Initialization stuff.
-
-=cut
+has coercion => (
+ is => 'ro',
+ isa => 'Object',
+ builder => '_build_coercion',
+);
-around 'new' => sub {
- my ($new, $class, @args) = @_;
- my $self = $class->$new(@args);
- $self->coercion(MooseX::Meta::TypeCoercion::Structured->new(
+sub _build_coercion {
+ my ($self) = @_;
+ return MooseX::Meta::TypeCoercion::Structured->new(
type_constraint => $self,
- ));
- return $self;
-};
+ );
+}
-=head2 validate
+=method validate
Messing with validate so that we can support niced error messages.
+
=cut
+sub _clean_message {
+ my $message = shift @_;
+ $message =~s/MooseX::Types::Structured:://g;
+ return $message;
+}
+
override 'validate' => sub {
- my ($self, @args) = @_;
- my $message = bless {message=>undef}, 'MooseX::Types::Structured::Message';
+ my ($self, $value, $message_stack) = @_;
+ unless ($message_stack) {
+ $message_stack = MooseX::Types::Structured::MessageStack->new();
+ }
+
+ $message_stack->inc_level;
- if ($self->_compiled_type_constraint->(@args, $message)) {
+ if ($self->_compiled_type_constraint->($value, $message_stack)) {
## Everything is good, no error message to return
return undef;
} else {
## Whoops, need to figure out the right error message
- my $args = Devel::PartialDump::dump(@args);
- if(my $message = $message->{message}) {
- return $self->get_message("$args, Internal Validation Error is: $message");
+ my $args = Devel::PartialDump::dump($value);
+ $message_stack->dec_level;
+ if($message_stack->has_messages) {
+ if($message_stack->level) {
+ ## we are inside a deeply structured constraint
+ return $self->get_message($args);
+ } else {
+ my $message_str = $message_stack->as_string;
+ return _clean_message($self->get_message("$args, Internal Validation Error is: $message_str"));
+ }
} else {
return $self->get_message($args);
}
}
};
-=head2 generate_constraint_for ($type_constraints)
+=method generate_constraint_for ($type_constraints)
Given some type constraints, use them to generate validation rules for an ref
of values (to be passed at check time)
sub generate_constraint_for {
my ($self, $type_constraints) = @_;
- return sub {
- my $arg = shift @_;
- my $constraint_generator = $self->constraint_generator;
- my $result = $constraint_generator->($type_constraints, $arg, $_[0]);
- return $result;
- };
+ return $self->constraint_generator->($self, $type_constraints);
}
-=head2 parameterize (@type_constraints)
+=method parameterize (@type_constraints)
Given a ref of type constraints, create a structured type.
=cut
sub parameterize {
-
my ($self, @type_constraints) = @_;
my $class = ref $self;
my $name = $self->name .'['. join(',', map {"$_"} @type_constraints) .']';
);
}
-=head2 __infer_constraint_generator
+=method __infer_constraint_generator
This returns a CODEREF which generates a suitable constraint generator. Not
user servicable, you'll never call this directly.
## 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
+=method compile_type_constraint
hook into compile_type_constraint so we can set the correct validation rules.
around 'compile_type_constraint' => sub {
my ($compile_type_constraint, $self, @args) = @_;
-
+
if($self->has_type_constraints) {
my $type_constraints = $self->type_constraints;
my $constraint = $self->generate_constraint_for($type_constraints);
- $self->_set_constraint($constraint);
+ $self->_set_constraint($constraint);
}
return $self->$compile_type_constraint(@args);
};
-=head2 create_child_type
+=method create_child_type
modifier to make sure we get the constraint_generator
);
};
-=head2 is_a_type_of
+=method is_a_type_of
-=head2 is_subtype_of
+=method is_subtype_of
-=head2 equals
+=method equals
Override the base class behavior.
sub equals {
my ( $self, $type_or_name ) = @_;
- my $other = Moose::Util::TypeConstraints::find_type_constraint($type_or_name);
+ my $other = Moose::Util::TypeConstraints::find_type_constraint($type_or_name)
+ or return;
return unless $other->isa(__PACKAGE__);
-
+
return (
$self->parent->equals($other->parent)
and
sub is_a_type_of {
my ( $self, $type_or_name ) = @_;
- my $other = Moose::Util::TypeConstraints::find_type_constraint($type_or_name);
+ my $other = Moose::Util::TypeConstraints::find_type_constraint($type_or_name)
+ or return;
if ( $other->isa(__PACKAGE__) and @{ $other->type_constraints || [] }) {
- warn "structured ( $self, $other )";
if ( $self->parent->is_a_type_of($other->parent) ) {
- warn "related ( $self, $other )";
return $self->_type_constraints_op_all($other, "is_a_type_of");
} elsif ( $self->parent->is_a_type_of($other) ) {
return 1;
sub is_subtype_of {
my ( $self, $type_or_name ) = @_;
-
- my $other = Moose::Util::TypeConstraints::find_type_constraint($type_or_name);
-
+ my $other = Moose::Util::TypeConstraints::find_type_constraint($type_or_name)
+ or return;
if ( $other->isa(__PACKAGE__) ) {
if ( $other->type_constraints and $self->type_constraints ) {
if ( $self->parent->is_a_type_of($other->parent) ) {
}
}
-=head2 type_constraints_equals
+=method type_constraints_equals
-Checks to see if the internal type contraints are equal.
+Checks to see if the internal type constraints are equal.
=cut
while(@self_type_constraints) {
my $self_type_constraint = shift @self_type_constraints;
my $other_type_constraint = shift @other_type_constraints;
-
+
$_ = Moose::Util::TypeConstraints::find_or_create_isa_type_constraint($_)
for $self_type_constraint, $other_type_constraint;
- $self_type_constraint->$op($other_type_constraint) or return;
+ my $result = $self_type_constraint->$op($other_type_constraint);
+ return unless $result;
}
-
+
return 1; ##If we get this far, everything is good.
}
while(@self_type_constraints) {
my $self_type_constraint = shift @self_type_constraints;
my $other_type_constraint = shift @other_type_constraints;
-
+
$_ = Moose::Util::TypeConstraints::find_or_create_isa_type_constraint($_)
for $self_type_constraint, $other_type_constraint;
-
+
return 1 if $self_type_constraint->$op($other_type_constraint);
}
return 0;
}
-=head2 get_message
+=method get_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
L<Moose>, L<Moose::Meta::TypeConstraint>
-=head1 AUTHOR
-
-John Napiorkowski, C<< <jjnapiork@cpan.org> >>
-
-=head1 COPYRIGHT & LICENSE
-
-This program is free software; you can redistribute it and/or modify
-it under the same terms as Perl itself.
-
=cut
-__PACKAGE__->meta->make_immutable;
+__PACKAGE__->meta->make_immutable(inline_constructor => 0);
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