use Mouse::Util qw(:meta); # enables strict and warnings
use overload
- '""' => sub { shift->{name} }, # stringify to tc name
- fallback => 1;
+ 'bool' => sub { 1 }, # always true
+
+ '""' => sub { $_[0]->name }, # stringify to tc name
-use Carp qw(confess);
-use Scalar::Util qw(blessed reftype);
+ '|' => sub { # or-combination
+ require Mouse::Util::TypeConstraints;
+ return Mouse::Util::TypeConstraints::find_or_parse_type_constraint(
+ "$_[0] | $_[1]",
+ );
+ },
+
+ fallback => 1;
-my $null_check = sub { 1 };
+use Carp ();
sub new {
my($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;
$check = $args{constraint};
- if(blessed($check)){
- Carp::cluck("Constraint for $args{name} must be a CODE reference");
- $check = $check->{compiled_type_constraint};
- }
-
if(defined($check) && ref($check) ne 'CODE'){
- confess("Constraint for $args{name} is not a CODE reference");
+ Carp::confess("Constraint for $args{name} is not a CODE reference");
}
$args{package_defined_in} ||= caller;
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 { $_[0]->{name} }
-sub parent { $_[0]->{parent} }
-sub message { $_[0]->{message} }
-
-sub _compiled_type_constraint{ $_[0]->{compiled_type_constraint} }
+sub name;
+sub parent;
+sub message;
+sub has_coercion;
+sub _compiled_type_constraint;
+sub _compiled_type_coercion;
-sub has_coercion{ exists $_[0]->{_compiled_type_coercion} }
-
-sub compile_type_constraint{
- my($self) = @_;
-
- # add parents first
- my @checks;
- for(my $parent = $self->parent; defined $parent; $parent = $parent->parent){
- if($parent->{hand_optimized_type_constraint}){
- push @checks, $parent->{hand_optimized_type_constraint};
- last; # a hand optimized constraint must include all the parents
- }
- elsif($parent->{constraint}){
- push @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;
my $action = $_[++$i];
if(exists $has{$from}){
- confess("A coercion action already exists for '$from'");
+ Carp::confess("A coercion action already exists for '$from'");
}
my $type = Mouse::Util::TypeConstraints::find_or_parse_type_constraint($from)
- or confess("Could not find the type constraint ($from) to coerce from");
+ or Carp::confess("Could not find the type constraint ($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");
+ 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 $self = shift;
- if(!$self->{_compiled_type_coercion}){
- confess("Cannot coerce without a type coercion ($self)");
+
+ my $coercion = $self->_compiled_type_coercion;
+ if(!$coercion){
+ Carp::confess("Cannot coerce without a type coercion");
}
return $_[0] if $self->_compiled_type_constraint->(@_);
- return $self->{_compiled_type_coercion}->(@_);
+ return $coercion->(@_);
}
sub get_message {
my($self, $other) = @_;
# ->is_a_type_of('__ANON__') is always false
- return 0 if !blessed($other) && $other eq '__ANON__';
+ return 0 if !ref($other) && $other eq '__ANON__';
(my $other_name = $other) =~ s/\s+//g;
return 0;
}
+# See also Moose::Meta::TypeConstraint::Parameterizable
+sub parameterize{
+ my($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,
+ parameter => $param,
+ constraint => $generator->($param), # must be 'constraint', not 'optimized'
+
+ type => 'Parameterized',
+ );
+}
1;
__END__
=head1 VERSION
-This document describes Mouse version 0.39
+This document describes Mouse version 0.50
=head1 DESCRIPTION
projects / gitmo/Mouse.git / blobdiff