Am Thu, 10 Oct 2013 16:46:18 +0200 schrieb "Gary Willoughby" <dev at nomad.so>: > class Foo(T) : Bar!(int) if (is(T == string)) // <-- > template constraint causes error. This syntax was added in a more recent frontend release. You should do this instead for older frontend versions: ------- class Foo(T) if (is(T == string)) : Bar!(int) -------