package Mouse::Meta::TypeConstraint;
use Mouse::Util qw(:meta); # enables strict and warnings
+use Scalar::Util ();
use overload
- 'bool' => sub { 1 }, # always true
-
+ 'bool' => sub (){ 1 }, # always true
'""' => sub { $_[0]->name }, # stringify to tc name
-
+ '0+' => sub { Scalar::Util::refaddr($_[0]) },
'|' => sub { # or-combination
require Mouse::Util::TypeConstraints;
return Mouse::Util::TypeConstraints::find_or_parse_type_constraint(
fallback => 1;
-use Carp ();
-
sub new {
- my($class, %args) = @_;
+ my $class = shift;
+ my %args = @_ == 1 ? %{$_[0]} : @_;
$args{name} = '__ANON__' if !defined $args{name};
$check = $args{constraint};
if(defined($check) && ref($check) ne 'CODE'){
- Carp::confess("Constraint for $args{name} is not a CODE reference");
+ $class->throw_error("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 create_child_type{
my $self = shift;
- # XXX: FIXME
return ref($self)->new(
# a child inherits its parent's attributes
%{$self},
);
}
+sub name;
+sub parent;
+sub message;
+sub has_coercion;
+
+sub check;
+
+sub type_parameter;
+sub __is_parameterized;
+
+sub _compiled_type_constraint;
+sub _compiled_type_coercion;
+
+sub compile_type_constraint;
+
+
sub _add_type_coercions{
my $self = shift;
- my $coercions = ($self->{_coercion_map} ||= []);
+ my $coercions = ($self->{coercion_map} ||= []);
my %has = map{ $_->[0] => undef } @{$coercions};
for(my $i = 0; $i < @_; $i++){
my $action = $_[++$i];
if(exists $has{$from}){
- Carp::confess("A coercion action already exists for '$from'");
+ $self->throw_error("A coercion action already exists for '$from'");
}
my $type = Mouse::Util::TypeConstraints::find_or_parse_type_constraint($from)
- or Carp::confess("Could not find the type constraint ($from) to coerce from");
+ or $self->throw_error("Could not find the type constraint ($from) to coerce from");
push @{$coercions}, [ $type => $action ];
}
# compile
if(exists $self->{type_constraints}){ # union type
- Carp::confess("Cannot add additional type coercions to Union types");
+ $self->throw_error("Cannot add additional type coercions to Union types");
}
else{
- $self->{_compiled_type_coercion} = sub {
- my($thing) = @_;
- foreach my $pair (@{$coercions}) {
- #my ($constraint, $converter) = @$pair;
- if ($pair->[0]->check($thing)) {
- local $_ = $thing;
- return $pair->[1]->($thing);
- }
- }
- return $thing;
- };
+ $self->_compile_type_coercion();
}
return;
}
-sub check {
- my $self = shift;
- return $self->_compiled_type_constraint->(@_);
+sub _compile_type_coercion {
+ my($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) = @_;
+ foreach my $type(@coercions){
+ my $value = $type->coerce($thing);
+ return $value if $self->check($value);
+ }
+ return $thing;
+ };
+ }
+ return;
}
sub coerce {
my $self = shift;
- return $_[0] if $self->_compiled_type_constraint->(@_);
-
my $coercion = $self->_compiled_type_coercion;
- return $coercion ? $coercion->(@_) : $_[0];
+ if(!$coercion){
+ $self->throw_error("Cannot coerce without a type coercion");
+ }
+
+ return $_[0] if $self->check(@_);
+
+ return $coercion->(@_);
}
sub get_message {
}
else {
$value = ( defined $value ? overload::StrVal($value) : 'undef' );
- return "Validation failed for '$self' failed with value $value";
+ return "Validation failed for '$self' with value $value";
}
}
$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");
+ || $self->throw_error("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',
+ name => $name,
+ parent => $self,
+ type_parameter => $param,
+ constraint => $generator->($param), # must be 'constraint', not 'optimized'
);
}
+sub assert_valid {
+ my ($self, $value) = @_;
+
+ if(!$self->check($value)){
+ $self->throw_error($self->get_message($value));
+ }
+ return 1;
+}
+
+sub throw_error {
+ require Mouse::Meta::Module;
+ goto &Mouse::Meta::Module::throw_error;
+}
+
1;
__END__
=head1 VERSION
-This document describes Mouse version 0.46
+This document describes Mouse version 0.67
=head1 DESCRIPTION