use Mouse::Util qw(:meta); # enables strict and warnings
use overload
+ 'bool' => sub { 1 }, # always true
+
'""' => sub { $_[0]->name }, # stringify to tc name
+
+ '|' => sub { # or-combination
+ require Mouse::Util::TypeConstraints;
+ return Mouse::Util::TypeConstraints::find_or_parse_type_constraint(
+ "$_[0] | $_[1]",
+ );
+ },
+
fallback => 1;
use Carp ();
-my $null_check = sub { 1 };
-
sub new {
my($class, %args) = @_;
my $check = delete $args{optimized};
- if($args{_compiled_type_constraint}){
- Carp::cluck("'_compiled_type_constraint' has been deprecated, use 'optimized' instead")
- if _MOUSE_VERBOSE;
-
- $check = $args{_compiled_type_constraint};
- }
-
if($check){
$args{hand_optimized_type_constraint} = $check;
$args{compiled_type_constraint} = $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;
- };
- }
- }
-
+ $self->_compile_union_type_coercion() if $self->{type_constraints};
return $self;
}
);
}
+sub name;
+sub parent;
+sub message;
+sub has_coercion;
+sub _compiled_type_constraint;
+sub _compiled_type_coercion;
-sub compile_type_constraint{
- my($self) = @_;
-
- # add parents first
- my @checks;
- for(my $parent = $self->parent; defined $parent; $parent = $parent->parent){
- if($parent->{hand_optimized_type_constraint}){
- unshift @checks, $parent->{hand_optimized_type_constraint};
- last; # a hand optimized constraint must include all the parents
- }
- elsif($parent->{constraint}){
- unshift @checks, $parent->{constraint};
- }
- }
-
- # then add child
- if($self->{constraint}){
- push @checks, $self->{constraint};
- }
-
- if($self->{type_constraints}){ # Union
- my @types = map{ $_->_compiled_type_constraint } @{ $self->{type_constraints} };
- push @checks, sub{
- foreach my $c(@types){
- return 1 if $c->($_[0]);
- }
- return 0;
- };
- }
-
- if(@checks == 0){
- $self->{compiled_type_constraint} = $null_check;
- }
- elsif(@checks == 1){
- my $c = $checks[0];
- $self->{compiled_type_constraint} = sub{
- my(@args) = @_;
- local $_ = $args[0];
- return $c->(@args);
- };
- }
- else{
- $self->{compiled_type_constraint} = sub{
- my(@args) = @_;
- local $_ = $args[0];
- foreach my $c(@checks){
- return undef if !$c->(@args);
- }
- return 1;
- };
- }
- return;
-}
+sub compile_type_constraint;
sub _add_type_coercions{
my $self = shift;
Carp::confess("Cannot add additional type coercions to Union types");
}
else{
+ $self->_compile_type_coercion();
+ }
+ return;
+}
+
+sub _compile_type_coercion {
+ my($self) = @_;
+
+ my @coercions = @{$self->{_coercion_map}};
+
+ $self->{_compiled_type_coercion} = sub {
+ my($thing) = @_;
+ foreach my $pair (@coercions) {
+ #my ($constraint, $converter) = @$pair;
+ if ($pair->[0]->check($thing)) {
+ local $_ = $thing;
+ return $pair->[1]->($thing);
+ }
+ }
+ return $thing;
+ };
+ return;
+}
+
+sub _compile_union_type_coercion {
+ my($self) = @_;
+
+ my @coercions;
+ foreach my $type(@{$self->{type_constraints}}){
+ if($type->has_coercion){
+ push @coercions, $type;
+ }
+ }
+ if(@coercions){
$self->{_compiled_type_coercion} = sub {
- my($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 $thing;\r
+ my($thing) = @_;
+ foreach my $type(@coercions){
+ my $value = $type->coerce($thing);
+ return $value if $self->check($value);
+ }
+ return $thing;
};
}
return;
sub coerce {
my $self = shift;
+ my $coercion = $self->_compiled_type_coercion;
+ if(!$coercion){
+ Carp::confess("Cannot coerce without a type coercion");
+ }
+
return $_[0] if $self->_compiled_type_constraint->(@_);
- my $coercion = $self->_compiled_type_coercion;
- return $coercion ? $coercion->(@_) : $_[0];
+ return $coercion->(@_);
}
sub get_message {
return 0;
}
+# See also Moose::Meta::TypeConstraint::Parameterizable
+sub parameterize{
+ my($self, $param, $name) = @_;
+
+ if(!ref $param){
+ require Mouse::Util::TypeConstraints;
+ $param = Mouse::Util::TypeConstraints::find_or_create_isa_type_constraint($param);
+ }
+
+ $name ||= sprintf '%s[%s]', $self->name, $param->name;
+
+ my $generator = $self->{constraint_generator}
+ || Carp::confess("The $name constraint cannot be used, because $param doesn't subtype from a parameterizable type");
+
+ return Mouse::Meta::TypeConstraint->new(
+ name => $name,
+ parent => $self,
+ type_parameter => $param,
+ constraint => $generator->($param), # must be 'constraint', not 'optimized'
+
+ type => 'Parameterized',
+ );
+}
+
+sub assert_valid {
+ my ($self, $value) = @_;
+
+ if(!$self->_compiled_type_constraint->($value)){
+ Carp::confess($self->get_message($value));
+ }
+ return 1;
+}
1;
__END__
=head1 VERSION
-This document describes Mouse version 0.40_01
+This document describes Mouse version 0.50_01
=head1 DESCRIPTION
projects / gitmo/Mouse.git / blobdiff