Return values of type 'Generator' must be explicitly specified.

[jmalloc]

Hey man,

If I remember correctly, this is about creating suitable default return values for stubs (?).

I've started using Phony 0.8 for testing recoil and recoil/amqp and this is quickly becoming annoying for largish interfaces where I'm mocking specific methods.

For my purposes it would be suitable if methods marked as returning any kind of traversable were to return an empty generator. For the purposes of coroutines this is equivalent to "return null", and I don't thing it would present problems for non-coroutine use of traversables/generators (we already do this for arrays).

Any thoughts? I'll submit a PR if you're happy for this to go ahead.

[jmalloc]

I've hacked this into my local copy for now:

                case 'Iterator':
                case 'Traversable':
                    $value = new \ArrayIterator(array());

                    break;

                case 'Generator':
                    $fn = function () { return; yield; };
                    $value = $fn();

                    break;

It would probably need to use the feature detector for building the generator or whatever, though that shouldn't produce a parse error even under PHP 5.3.