package Mouse::TypeRegistry;
use strict;
use warnings;
-use Scalar::Util qw/looks_like_number blessed openhandle/;
-no warnings 'uninitialized';
-sub optimized_constraints {
- return {
+use Carp ();
+use Mouse::Util qw/blessed looks_like_number openhandle/;
+
+my $SUBTYPE = +{};
+my $COERCE = +{};
+
+#find_type_constraint register_type_constraint
+sub import {
+ my $class = shift;
+ my %args = @_;
+ my $caller = $args{callee} || caller(0);
+
+ no strict 'refs';
+ *{"$caller\::as"} = \&_as;
+ *{"$caller\::where"} = \&_where;
+ *{"$caller\::message"} = \&_message;
+ *{"$caller\::from"} = \&_from;
+ *{"$caller\::via"} = \&_via;
+ *{"$caller\::subtype"} = \&_subtype;
+ *{"$caller\::coerce"} = \&_coerce;
+ *{"$caller\::class_type"} = \&_class_type;
+ *{"$caller\::role_type"} = \&_role_type;
+}
+
+
+sub _as ($) {
+ as => $_[0]
+}
+sub _where (&) {
+ where => $_[0]
+}
+sub _message ($) {
+ message => $_[0]
+}
+
+sub _from { @_ }
+sub _via (&) {
+ $_[0]
+}
+
+my $optimized_constraints;
+my $optimized_constraints_base;
+{
+ no warnings 'uninitialized';
+ $SUBTYPE = {
Any => sub { 1 },
Item => sub { 1 },
Bool => sub {
Num => sub { !ref($_) && looks_like_number($_) },
Int => sub { defined($_) && !ref($_) && /^-?[0-9]+$/ },
Str => sub { defined($_) && !ref($_) },
+ ClassName => sub { Mouse::is_class_loaded($_) },
Ref => sub { ref($_) },
ScalarRef => sub { ref($_) eq 'SCALAR' },
or
blessed($_)
&& $_->isa("IO::Handle")
- },
+ },
Object => sub { blessed($_) && blessed($_) ne 'Regexp' },
+ };
- ClassName => sub {
- return if ref($_);
- return unless defined($_) && length($_);
+ sub optimized_constraints { $SUBTYPE }
+ my @SUBTYPE_KEYS = keys %{ $SUBTYPE };
+ sub list_all_builtin_type_constraints { @SUBTYPE_KEYS }
+}
- # walk the symbol table tree to avoid autovififying
- # \*{${main::}{"Foo::"}} == \*main::Foo::
+sub _subtype {
+ my $pkg = caller(0);
+ my($name, %conf) = @_;
+ if (my $type = $SUBTYPE->{$name}) {
+ Carp::croak "The type constraint '$name' has already been created, cannot be created again in $pkg";
+ };
+ my $as = $conf{as};
+ my $stuff = $conf{where} || optimized_constraints()->{$as};
- my $pack = \*::;
- foreach my $part (split('::', $_)) {
- return unless exists ${$$pack}{"${part}::"};
- $pack = \*{${$$pack}{"${part}::"}};
- }
+ $SUBTYPE->{$name} = $stuff;
+}
- # check for $VERSION or @ISA
- return 1 if exists ${$$pack}{VERSION}
- && defined *{${$$pack}{VERSION}}{SCALAR};
- return 1 if exists ${$$pack}{ISA}
- && defined *{${$$pack}{ISA}}{ARRAY};
+sub _coerce {
+ my($name, %conf) = @_;
- # check for any method
- foreach ( keys %{$$pack} ) {
- next if substr($_, -2, 2) eq '::';
- return 1 if defined *{${$$pack}{$_}}{CODE};
- }
+ Carp::croak "Cannot find type '$name', perhaps you forgot to load it."
+ unless optimized_constraints()->{$name};
- # fail
- return;
- },
- };
+ my $subtypes = optimized_constraints();
+ $COERCE->{$name} ||= {};
+ while (my($type, $code) = each %conf) {
+ Carp::croak "A coercion action already exists for '$type'"
+ if $COERCE->{$name}->{$type};
+
+ Carp::croak "Could not find the type constraint ($type) to coerce from"
+ unless $subtypes->{$type};
+
+ $COERCE->{$name}->{$type} = $code;
+ }
+}
+
+sub _class_type {
+ my $pkg = caller(0);
+ my($name, $conf) = @_;
+ my $class = $conf->{class};
+ _subtype(
+ $name => where => sub {
+ defined $_ && ref($_) eq $class;
+ }
+ );
+}
+
+sub _role_type {
+ my($name, $conf) = @_;
+ my $role = $conf->{role};
+ _subtype(
+ $name => where => sub {
+ return unless defined $_ && ref($_) && $_->isa('Mouse::Object');
+ $_->meta->does_role($role);
+ }
+ );
+}
+
+sub typecast_constraints {
+ my($class, $pkg, $type_constraint, $types, $value) = @_;
+ my $optimized_constraints = optimized_constraints();
+
+ for my $type (ref($types) eq 'ARRAY' ? @{ $types } : ( $types )) {
+ next unless $COERCE->{$type};
+
+ for my $coerce_type (keys %{ $COERCE->{$type} }) {
+ local $_ = $value;
+ if ($optimized_constraints->{$coerce_type}->()) {
+ local $_ = $value;
+ local $_ = $COERCE->{$type}->{$coerce_type}->();
+ return $_ if $type_constraint->();
+ }
+ }
+ }
+ return $value;
}
1;