-use lib '/Users/stevan/Projects/Moose/Moose/Class-MOP/branches/Class-MOP-tranformations/lib';
-
package Moose::Util::TypeConstraints;
use strict;
use B 'svref_2object';
use Sub::Exporter;
-our $VERSION = '0.09';
+our $VERSION = '0.12';
+our $AUTHORITY = 'cpan:STEVAN';
+
+# Prototyped subs must be predeclared because we have a circular dependency
+# with Moose::Meta::Attribute et. al. so in case of us being use'd first the
+# predeclaration ensures the prototypes are in scope when consumers are
+# compiled
+
+sub find_type_constraint ($);
+sub _create_type_constraint ($$$;$$);
+sub _install_type_coercions ($$);
+sub create_type_constraint_union (@);
+sub type ($$;$$);
+sub subtype ($$;$$$);
+sub coerce ($@);
+sub as ($);
+sub from ($);
+sub where (&);
+sub via (&);
+sub message (&);
+sub optimize_as (&);
+sub enum ($;@);
use Moose::Meta::TypeConstraint;
use Moose::Meta::TypeCoercion;
my @exports = qw/
- type subtype as where message
+ type subtype as where message optimize_as
coerce from via
enum
find_type_constraint
Data::Dumper::Dumper(\%TYPES);
}
- sub _create_type_constraint ($$$;$) {
- my ($name, $parent, $check, $message) = @_;
- my $pkg_defined_in = scalar(caller(1));
+ sub _create_type_constraint ($$$;$$) {
+ my $name = shift;
+ my $parent = shift;
+ my $check = shift;;
+
+ my ($message, $optimized);
+ for (@_) {
+ $message = $_->{message} if exists $_->{message};
+ $optimized = $_->{optimized} if exists $_->{optimized};
+ }
+
+ my $pkg_defined_in = scalar(caller(0));
+
($TYPES{$name}->[0] eq $pkg_defined_in)
- || confess "The type constraint '$name' has already been created "
- if defined $name && exists $TYPES{$name};
+ || confess ("The type constraint '$name' has already been created in "
+ . $TYPES{$name}->[0] . " and cannot be created again in "
+ . $pkg_defined_in)
+ if defined $name && exists $TYPES{$name};
+
$parent = find_type_constraint($parent) if defined $parent;
my $constraint = Moose::Meta::TypeConstraint->new(
name => $name || '__ANON__',
parent => $parent,
constraint => $check,
message => $message,
+ optimized => $optimized,
);
$TYPES{$name} = [ $pkg_defined_in, $constraint ] if defined $name;
return $constraint;
);
}
- sub export_type_contstraints_as_functions {
+ sub export_type_constraints_as_functions {
my $pkg = caller();
no strict 'refs';
foreach my $constraint (keys %TYPES) {
*{"${pkg}::${constraint}"} = find_type_constraint($constraint)->_compiled_type_constraint;
}
- }
+ }
+
+ *Moose::Util::TypeConstraints::export_type_contstraints_as_functions = \&export_type_constraints_as_functions;
+
+ sub list_all_type_constraints { keys %TYPES }
}
# type constructors
-sub type ($$) {
- my ($name, $check) = @_;
- _create_type_constraint($name, undef, $check);
+sub type ($$;$$) {
+ splice(@_, 1, 0, undef);
+ goto &_create_type_constraint;
}
-sub subtype ($$;$$) {
- unshift @_ => undef if scalar @_ <= 2;
+sub subtype ($$;$$$) {
+ unshift @_ => undef if scalar @_ <= 2;
goto &_create_type_constraint;
}
sub from ($) { $_[0] }
sub where (&) { $_[0] }
sub via (&) { $_[0] }
-sub message (&) { $_[0] }
+
+sub message (&) { +{ message => $_[0] } }
+sub optimize_as (&) { +{ optimized => $_[0] } }
sub enum ($;@) {
my ($type_name, @values) = @_;
subtype 'Undef' => as 'Item' => where { !defined($_) };
subtype 'Defined' => as 'Item' => where { defined($_) };
-subtype 'Bool' => as 'Item' => where { !defined($_) || $_ eq "" || "$_" eq '1' || "$_" eq '0' };
-
-subtype 'Value' => as 'Defined' => where { !ref($_) };
-subtype 'Ref' => as 'Defined' => where { ref($_) };
-
-subtype 'Str' => as 'Value' => where { 1 };
-
-subtype 'Num' => as 'Value' => where { Scalar::Util::looks_like_number($_) };
-subtype 'Int' => as 'Num' => where { "$_" =~ /^-?[0-9]+$/ };
+subtype 'Bool'
+ => as 'Item'
+ => where { !defined($_) || $_ eq "" || "$_" eq '1' || "$_" eq '0' };
-subtype 'ScalarRef' => as 'Ref' => where { ref($_) eq 'SCALAR' };
-subtype 'ArrayRef' => as 'Ref' => where { ref($_) eq 'ARRAY' };
-subtype 'HashRef' => as 'Ref' => where { ref($_) eq 'HASH' };
-subtype 'CodeRef' => as 'Ref' => where { ref($_) eq 'CODE' };
-subtype 'RegexpRef' => as 'Ref' => where { ref($_) eq 'Regexp' };
-subtype 'GlobRef' => as 'Ref' => where { ref($_) eq 'GLOB' };
+subtype 'Value'
+ => as 'Defined'
+ => where { !ref($_) }
+ => optimize_as { defined($_[0]) && !ref($_[0]) };
+
+subtype 'Ref'
+ => as 'Defined'
+ => where { ref($_) }
+ => optimize_as { ref($_[0]) };
+
+subtype 'Str'
+ => as 'Value'
+ => where { 1 }
+ => optimize_as { defined($_[0]) && !ref($_[0]) };
+
+subtype 'Num'
+ => as 'Value'
+ => where { Scalar::Util::looks_like_number($_) }
+ => optimize_as { !ref($_[0]) && Scalar::Util::looks_like_number($_[0]) };
+
+subtype 'Int'
+ => as 'Num'
+ => where { "$_" =~ /^-?[0-9]+$/ }
+ => optimize_as { defined($_[0]) && !ref($_[0]) && $_[0] =~ /^-?[0-9]+$/ };
+
+subtype 'ScalarRef' => as 'Ref' => where { ref($_) eq 'SCALAR' } => optimize_as { ref($_[0]) eq 'SCALAR' };
+subtype 'ArrayRef' => as 'Ref' => where { ref($_) eq 'ARRAY' } => optimize_as { ref($_[0]) eq 'ARRAY' };
+subtype 'HashRef' => as 'Ref' => where { ref($_) eq 'HASH' } => optimize_as { ref($_[0]) eq 'HASH' };
+subtype 'CodeRef' => as 'Ref' => where { ref($_) eq 'CODE' } => optimize_as { ref($_[0]) eq 'CODE' };
+subtype 'RegexpRef' => as 'Ref' => where { ref($_) eq 'Regexp' } => optimize_as { ref($_[0]) eq 'Regexp' };
+subtype 'GlobRef' => as 'Ref' => where { ref($_) eq 'GLOB' } => optimize_as { ref($_[0]) eq 'GLOB' };
# NOTE:
# scalar filehandles are GLOB refs,
# but a GLOB ref is not always a filehandle
-subtype 'FileHandle' => as 'GlobRef' => where { Scalar::Util::openhandle($_) };
+subtype 'FileHandle'
+ => as 'GlobRef'
+ => where { Scalar::Util::openhandle($_) }
+ => optimize_as { ref($_[0]) eq 'GLOB' && Scalar::Util::openhandle($_[0]) };
# NOTE:
# blessed(qr/.../) returns true,.. how odd
-subtype 'Object' => as 'Ref' => where { blessed($_) && blessed($_) ne 'Regexp' };
+subtype 'Object'
+ => as 'Ref'
+ => where { blessed($_) && blessed($_) ne 'Regexp' }
+ => optimize_as { blessed($_[0]) && blessed($_[0]) ne 'Regexp' };
+
+subtype 'Role'
+ => as 'Object'
+ => where { $_->can('does') }
+ => optimize_as { blessed($_[0]) && $_[0]->can('does') };
+
+subtype 'ClassName'
+ => as 'Str'
+ => where { eval { $_->isa('UNIVERSAL') } }
+ => optimize_as { !ref($_[0]) && eval { $_[0]->isa('UNIVERSAL') } };
-subtype 'Role' => as 'Object' => where { $_->can('does') };
+{
+ my @BUILTINS = list_all_type_constraints();
+ sub list_all_builtin_type_constraints { @BUILTINS }
+}
1;
=head1 DESCRIPTION
-This module provides Moose with the ability to create type contraints
-to be are used in both attribute definitions and for method argument
-validation.
+This module provides Moose with the ability to create custom type
+contraints to be used in attribute definition.
=head2 Important Caveat
yet to have been created yet, is to simply do this:
use DateTime;
- subtype 'DateTime' => as Object => where { $_->isa('DateTime') };
+ subtype 'DateTime' => as 'Object' => where { $_->isa('DateTime') };
=head2 Default Type Constraints
Num
Int
Str
+ ClassName
Ref
ScalarRef
ArrayRef
B<NOTE:> The C<Undef> type constraint does not work correctly
in every occasion, please use it sparringly.
+
+B<NOTE:> The C<ClassName> type constraint is simply a subtype
+of string which responds true to C<isa('UNIVERSAL')>. This means
+that your class B<must> be loaded for this type constraint to
+pass. I know this is not ideal for all, but it is a saner
+restriction then most others.
+
+=head2 Use with Other Constraint Modules
+
+This module should play fairly nicely with other constraint
+modules with only some slight tweaking. The C<where> clause
+in types is expected to be a C<CODE> reference which checks
+it's first argument and returns a bool. Since most constraint
+modules work in a similar way, it should be simple to adapt
+them to work with Moose.
+
+For instance, this is how you could use it with
+L<Declare::Constraints::Simple> to declare a completely new type.
+
+ type 'HashOfArrayOfObjects'
+ => IsHashRef(
+ -keys => HasLength,
+ -values => IsArrayRef( IsObject ));
+
+For more examples see the F<t/204_example_w_DCS.t> test file.
+
+Here is an example of using L<Test::Deep> and it's non-test
+related C<eq_deeply> function.
+
+ type 'ArrayOfHashOfBarsAndRandomNumbers'
+ => where {
+ eq_deeply($_,
+ array_each(subhashof({
+ bar => isa('Bar'),
+ random_number => ignore()
+ })))
+ };
+
+For a complete example see the F<t/205_example_w_TestDeep.t>
+test file.
=head1 FUNCTIONS
Given a list of C<@type_constraint_names>, this will return a
B<Moose::Meta::TypeConstraint::Union> instance.
-=item B<export_type_contstraints_as_functions>
+=item B<export_type_constraints_as_functions>
This will export all the current type constraints as functions
into the caller's namespace. Right now, this is mostly used for
testing, but it might prove useful to others.
+=item B<export_type_contstraints_as_functions>
+
+Alias for the above function.
+
+=item B<list_all_type_constraints>
+
+This will return a list of type constraint names, you can then
+fetch them using C<find_type_constraint ($type_name)> if you
+want to.
+
+=item B<list_all_builtin_type_constraints>
+
+This will return a list of builtin type constraints, meaning,
+those which are defined in this module. See the section
+labeled L<Default Type Constraints> for a complete list.
+
=back
=head2 Type Constraint Constructors
They will then register the type constraints in a global store
where Moose can get to them if it needs to.
-See the L<SYNOPOSIS> for an example of how to use these.
+See the L<SYNOPSIS> for an example of how to use these.
=over 4
This is just sugar for the type constraint construction syntax.
+=item B<optimize_as>
+
+This can be used to define a "hand optimized" version of your
+type constraint which can be used to avoid traversing a subtype
+constraint heirarchy.
+
+B<NOTE:> You should only use this if you know what you are doing,
+all the built in types use this, so your subtypes (assuming they
+are shallow) will not likely need to use this.
+
=back
=head2 Type Coercion Constructors
-Type constraints can also contain type coercions as well. In most
-cases Moose will run the type-coercion code first, followed by the
-type constraint check. This feature should be used carefully as it
-is very powerful and could easily take off a limb if you are not
-careful.
+Type constraints can also contain type coercions as well. If you
+ask your accessor too coerce, the Moose will run the type-coercion
+code first, followed by the type constraint check. This feature
+should be used carefully as it is very powerful and could easily
+take off a limb if you are not careful.
-See the L<SYNOPOSIS> for an example of how to use these.
+See the L<SYNOPSIS> for an example of how to use these.
=over 4
=head1 COPYRIGHT AND LICENSE
-Copyright 2006 by Infinity Interactive, Inc.
+Copyright 2006, 2007 by Infinity Interactive, Inc.
L<http://www.iinteractive.com>
projects / gitmo/Moose.git / blobdiff