my $tc;
if(exists $args->{isa}){
- $args->{type_constraint} = Mouse::Util::TypeConstraints::find_or_create_isa_type_constraint($args->{isa});
+ $tc = $args->{type_constraint} = Mouse::Util::TypeConstraints::find_or_create_isa_type_constraint($args->{isa});
}
- elsif(exists $args->{does}){
- $args->{type_constraint} = Mouse::Util::TypeConstraints::find_or_create_does_type_constraint($args->{does});
+
+ if(exists $args->{does}){
+ if(defined $tc){ # both isa and does supplied
+ my $does_ok = do{
+ local $@;
+ eval{ "$tc"->does($args) };
+ };
+ if(!$does_ok){
+ $class->throw_error("Cannot have both an isa option and a does option because '$tc' does not do '$args->{does}' on attribute ($name)");
+ }
+ }
+ else {
+ $tc = $args->{type_constraint} = Mouse::Util::TypeConstraints::find_or_create_does_type_constraint($args->{does});
+ }
}
- $tc = $args->{type_constraint};
if($args->{coerce}){
defined($tc)