package Mouse::Meta::TypeConstraint;
-use strict;
-use warnings;
+use Mouse::Util qw(:meta); # enables strict and warnings
use overload
'""' => sub { shift->{name} }, # stringify to tc name
use Carp qw(confess);
use Scalar::Util qw(blessed reftype);
-use Mouse::Util qw(:meta);
-
my $null_check = sub { 1 };
sub new {
my $check = delete $args{optimized};
if($args{_compiled_type_constraint}){
- Carp::cluck("'_compiled_type_constraint' has been deprecated, use 'optimized' instead");
- $check = $args{_compiled_type_constraint};
+ Carp::cluck("'_compiled_type_constraint' has been deprecated, use 'optimized' instead")
+ if _MOUSE_VERBOSE;
- if(blessed($check)){
- Carp::cluck("Constraint must be a CODE reference");
- $check = $check->{compiled_type_constraint};
- }
+ $check = $args{_compiled_type_constraint};
}
if($check){
my $self = bless \%args, $class;
$self->compile_type_constraint() if !$self->{hand_optimized_type_constraint};
+ if($self->{type_constraints}){ # Union
+ my @coercions;
+ foreach my $type(@{$self->{type_constraints}}){
+ if($type->has_coercion){
+ push @coercions, $type;
+ }
+ }
+ if(@coercions){
+ $self->{_compiled_type_coercion} = sub {
+ my($thing) = @_;
+ foreach my $type(@coercions){
+ my $value = $type->coerce($thing);
+ return $value if $self->check($value);
+ }
+ return $thing;
+ };
+ }
+ }
+
return $self;
}
sub _compiled_type_constraint{ $_[0]->{compiled_type_constraint} }
-sub check {
- my $self = shift;
- $self->_compiled_type_constraint->(@_);
-}
-
-sub validate {
- my ($self, $value) = @_;
- if ($self->_compiled_type_constraint->($value)) {
- return undef;
- }
- else {
- $self->get_message($value);
- }
-}
-
-sub assert_valid {
- my ($self, $value) = @_;
-
- my $error = $self->validate($value);
- return 1 if ! defined $error;
-
- confess($error);
-}
-
-sub get_message {
- my ($self, $value) = @_;
- if ( my $msg = $self->message ) {
- local $_ = $value;
- return $msg->($value);
- }
- else {
- $value = ( defined $value ? overload::StrVal($value) : 'undef' );
- return
- "Validation failed for '"
- . $self->name
- . "' failed with value $value";
- }
-}
-
-sub is_a_type_of{
- my($self, $other) = @_;
-
- # ->is_a_type_of('__ANON__') is always false
- return 0 if !blessed($other) && $other eq '__ANON__';
-
- (my $other_name = $other) =~ s/\s+//g;
-
- return 1 if $self->name eq $other_name;
-
- if(exists $self->{type_constraints}){ # union
- foreach my $type(@{$self->{type_constraints}}){
- return 1 if $type->name eq $other_name;
- }
- }
-
- for(my $parent = $self->parent; defined $parent; $parent = $parent->parent){
- return 1 if $parent->name eq $other_name;
- }
-
- return 0;
-}
+sub has_coercion{ exists $_[0]->{_compiled_type_coercion} }
sub compile_type_constraint{
my($self) = @_;
return;
}
+sub _add_type_coercions{
+ my $self = shift;
+
+ my $coercions = ($self->{_coercion_map} ||= []);
+ my %has = map{ $_->[0] => undef } @{$coercions};
+
+ for(my $i = 0; $i < @_; $i++){
+ my $from = $_[ $i];
+ my $action = $_[++$i];
+
+ if(exists $has{$from}){
+ confess("A coercion action already exists for '$from'");
+ }
+
+ my $type = Mouse::Util::TypeConstraints::find_or_parse_type_constraint($from)
+ or confess("Could not find the type constraint ($from) to coerce from");
+
+ push @{$coercions}, [ $type => $action ];
+ }
+
+ # compile
+ if(exists $self->{type_constraints}){ # union type
+ confess("Cannot add additional type coercions to Union types");
+ }
+ else{
+ $self->{_compiled_type_coercion} = sub {
+ my($thing) = @_;\r
+ foreach my $pair (@{$coercions}) {\r
+ #my ($constraint, $converter) = @$pair;\r
+ if ($pair->[0]->check($thing)) {\r
+ local $_ = $thing;
+ return $pair->[1]->($thing);
+ }\r
+ }\r
+ return $thing;\r
+ };
+ }
+ return;
+}
+
+sub check {
+ my $self = shift;
+ return $self->_compiled_type_constraint->(@_);
+}
+
+sub coerce {
+ my $self = shift;
+ if(!$self->{_compiled_type_coercion}){
+ confess("Cannot coerce without a type coercion ($self)");
+ }
+
+ return $_[0] if $self->_compiled_type_constraint->(@_);
+
+ return $self->{_compiled_type_coercion}->(@_);
+}
+
+sub get_message {
+ my ($self, $value) = @_;
+ if ( my $msg = $self->message ) {
+ local $_ = $value;
+ return $msg->($value);
+ }
+ else {
+ $value = ( defined $value ? overload::StrVal($value) : 'undef' );
+ return "Validation failed for '$self' failed with value $value";
+ }
+}
+
+sub is_a_type_of{
+ my($self, $other) = @_;
+
+ # ->is_a_type_of('__ANON__') is always false
+ return 0 if !blessed($other) && $other eq '__ANON__';
+
+ (my $other_name = $other) =~ s/\s+//g;
+
+ return 1 if $self->name eq $other_name;
+
+ if(exists $self->{type_constraints}){ # union
+ foreach my $type(@{$self->{type_constraints}}){
+ return 1 if $type->name eq $other_name;
+ }
+ }
+
+ for(my $parent = $self->parent; defined $parent; $parent = $parent->parent){
+ return 1 if $parent->name eq $other_name;
+ }
+
+ return 0;
+}
+
+
1;
__END__
Mouse::Meta::TypeConstraint - The Mouse Type Constraint metaclass
+=head1 VERSION
+
+This document describes Mouse version 0.39
+
=head1 DESCRIPTION
For the most part, the only time you will ever encounter an
projects / gitmo/Mouse.git / blobdiff