Parser doesn't handle interface functions with contracts

[alexrp]

The parser can't handle code such as:

public interface Iterable(T)
{
    public int opApply(scope int delegate(ref T) dg)
    in
    {
        assert(dg);
    }
}

It will complain on line 7, saying it expects a {.

[alexrp]

Such contracts are also valid in abstract classes (in general, anywhere actually; the parser shouldn't care about the context).

[aBothe]

You're right - it's that function body thing (again). Got to fix that.