as_is => [qw(
as where message optimize_as
from via
- type subtype coerce class_type role_type enum
+
+ type subtype class_type role_type duck_type
+ enum
+ coerce
+
find_type_constraint
)],
);
sub list_all_type_constraints { keys %TYPE }
}
-# is-a predicates
-BEGIN{
- _generate_class_type_for('Mouse::Meta::TypeConstraint' => '_is_a_type_constraint');
- _generate_class_type_for('Mouse::Meta::Class' => '_is_a_metaclass');
- _generate_class_type_for('Mouse::Meta::Role' => '_is_a_metarole');
-}
-
-
sub _create_type{
my $mode = shift;
}
if(!defined $name){
- if(!defined($name = $args{name})){
- $name = '__ANON__';
- }
+ $name = $args{name};
}
$args{name} = $name;
$parent = delete $args{as};
if(!$parent){
$parent = delete $args{name};
- $name = '__ANON__';
+ $name = undef;
}
}
- my $package_defined_in = $args{package_defined_in} ||= caller(1);
-
- my $existing = $TYPE{$name};
- if($existing && $existing->{package_defined_in} ne $package_defined_in){
- confess("The type constraint '$name' has already been created in "
- . "$existing->{package_defined_in} and cannot be created again in $package_defined_in");
+ if(defined $name){
+ my $package_defined_in = $args{package_defined_in} ||= caller(1);
+ my $existing = $TYPE{$name};
+ if($existing && $existing->{package_defined_in} ne $package_defined_in){
+ confess("The type constraint '$name' has already been created in "
+ . "$existing->{package_defined_in} and cannot be created again in $package_defined_in");
+ }
+ }
+ else{
+ $args{name} = '__ANON__';
}
$args{constraint} = delete $args{where} if exists $args{where};
$constraint = Mouse::Meta::TypeConstraint->new(%args);
}
- return $TYPE{$name} = $constraint;
+ if(defined $name){
+ return $TYPE{$name} = $constraint;
+ }
+ else{
+ return $constraint;
+ }
}
sub type {
my $class = $options->{class} || $name;
return _create_type 'subtype', $name => (
as => 'Object',
- optimized_as => _generate_class_type_for($class),
+ optimized_as => Mouse::Util::generate_isa_predicate_for($class),
type => 'Class',
);
);
}
-sub typecast_constraints { # DEPRECATED
- my($class, $pkg, $type, $value) = @_;
- Carp::croak("wrong arguments count") unless @_ == 4;
+sub duck_type {
+ my($name, @methods);
+
+ if(!(@_ == 1 && ref($_[0]) eq 'ARRAY')){
+ $name = shift;
+ }
+
+ @methods = (@_ == 1 && ref($_[0]) eq 'ARRAY') ? @{$_[0]} : @_;
- Carp::cluck("typecast_constraints() has been deprecated, which was an internal utility anyway");
+ return _create_type 'type', $name => (
+ optimized_as => Mouse::Util::generate_can_predicate_for(\@methods),
- return $type->coerce($value);
+ type => 'DuckType',
+ );
}
sub enum {
my($name, %valid);
- # enum ['small', 'medium', 'large']
- if (ref($_[0]) eq 'ARRAY') {
- %valid = map{ $_ => undef } @{ $_[0] };
- $name = sprintf '(%s)', join '|', sort @{$_[0]};
- }
- # enum size => 'small', 'medium', 'large'
- else{
- $name = shift;
- %valid = map{ $_ => undef } @_;
+ if(!(@_ == 1 && ref($_[0]) eq 'ARRAY')){
+ $name = shift;
}
+
+ %valid = map{ $_ => undef } (@_ == 1 && ref($_[0]) eq 'ARRAY' ? @{$_[0]} : @_);
+
return _create_type 'type', $name => (
optimized_as => sub{ defined($_[0]) && !ref($_[0]) && exists $valid{$_[0]} },
my $meta = Mouse::Util::get_metaclass_by_name($spec)
or return undef;
- if(_is_a_metarole($meta)){
+ if(Mouse::Util::is_a_metarole($meta)){
return role_type($spec);
}
else{
}
}
-$TYPE{ArrayRef}{constraint_generator} = sub {
- my($type_parameter) = @_;
- my $check = $type_parameter->_compiled_type_constraint;
-
- return sub{
- foreach my $value (@{$_}) {
- return undef unless $check->($value);
- }
- return 1;
- }
-};
-$TYPE{HashRef}{constraint_generator} = sub {
- my($type_parameter) = @_;
- my $check = $type_parameter->_compiled_type_constraint;
-
- return sub{
- foreach my $value(values %{$_}){
- return undef unless $check->($value);
- }
- return 1;
- };
-};
-
-# 'Maybe' type accepts 'Any', so it requires parameters
-$TYPE{Maybe}{constraint_generator} = sub {
- my($type_parameter) = @_;
- my $check = $type_parameter->_compiled_type_constraint;
-
- return sub{
- return !defined($_) || $check->($_);
- };
-};
+$TYPE{ArrayRef}{constraint_generator} = \&_parameterize_ArrayRef_for;
+$TYPE{HashRef}{constraint_generator} = \&_parameterize_HashRef_for;
+$TYPE{Maybe}{constraint_generator} = \&_parameterize_Maybe_for;
sub _find_or_create_parameterized_type{
my($base, $param) = @_;
my $name = sprintf '%s[%s]', $base->name, $param->name;
- $TYPE{$name} ||= do{
- my $generator = $base->{constraint_generator};
-
- if(!$generator){
- confess("The $name constraint cannot be used, because $param doesn't subtype from a parameterizable type");
- }
-
- Mouse::Meta::TypeConstraint->new(
- name => $name,
- parent => $base,
- constraint => $generator->($param),
-
- type => 'Parameterized',
- );
- }
+ $TYPE{$name} ||= $base->parameterize($param, $name);
}
+
sub _find_or_create_union_type{
my @types = sort map{ $_->{type_constraints} ? @{$_->{type_constraints}} : $_ } @_;
my $name = join '|', @types;
- $TYPE{$name} ||= do{
- return Mouse::Meta::TypeConstraint->new(
- name => $name,
- type_constraints => \@types,
+ $TYPE{$name} ||= Mouse::Meta::TypeConstraint->new(
+ name => $name,
+ type_constraints => \@types,
- type => 'Union',
- );
- };
+ type => 'Union',
+ );
}
# The type parser
sub find_type_constraint {
my($spec) = @_;
- return $spec if _is_a_type_constraint($spec);
+ return $spec if Mouse::Util::is_a_type_constraint($spec);
$spec =~ s/\s+//g;
return $TYPE{$spec};
sub find_or_parse_type_constraint {
my($spec) = @_;
- return $spec if _is_a_type_constraint($spec);
+ return $spec if Mouse::Util::is_a_type_constraint($spec);
$spec =~ s/\s+//g;
return $TYPE{$spec} || do{
}
1;
-
__END__
=head1 NAME
=head1 VERSION
-This document describes Mouse version 0.40_02
+This document describes Mouse version 0.50
=head2 SYNOPSIS
This module also provides a simple hierarchy for Perl 5 types, here is
that hierarchy represented visually.
- Any
+ Any
Item
Bool
Maybe[`a]
Undef
Defined
Value
- Num
- Int
Str
- ClassName
- RoleName
+ Num
+ Int
+ ClassName
+ RoleName
Ref
ScalarRef
ArrayRef[`a]
CodeRef
RegexpRef
GlobRef
- FileHandle
+ FileHandle
Object
B<NOTE:> Any type followed by a type parameter C<[`a]> can be
=over 4
-=item C<< subtype 'Name' => as 'Parent' => where { } ... -> Mouse::Meta::TypeConstraint >>
+=item C<< type $name => where { } ... -> Mouse::Meta::TypeConstraint >>
-=item C<< subtype as 'Parent' => where { } ... -> Mouse::Meta::TypeConstraint >>
+=item C<< subtype $name => as $parent => where { } ... -> Mouse::Meta::TypeConstraint >>
+
+=item C<< subtype as $parent => where { } ... -> Mouse::Meta::TypeConstraint >>
=item C<< class_type ($class, ?$options) -> Mouse::Meta::TypeConstraint >>
=item C<< role_type ($role, ?$options) -> Mouse::Meta::TypeConstraint >>
+=item C<< duck_type($name, @methods | \@methods) -> Mouse::Meta::TypeConstraint >>
+
+=item C<< duck_type(\@methods) -> Mouse::Meta::TypeConstraint >>
+
+=item C<< enum($name, @values | \@values) -> Mouse::Meta::TypeConstraint >>
+
=item C<< enum (\@values) -> Mouse::Meta::TypeConstraint >>
+=item C<< coerce $type => from $another_type, via { }, ... >>
+
=back
=over 4