public bool Matches(ITestActualEvaluation <TFrom> actualFactory) { var real = TestMatcherName.FromType(_real.GetType()); Func <T> thunk = () => { try { var actual = actualFactory.Value; return((T)(object)actual); } catch (InvalidCastException e) { throw SpecFailure.CastRequiredByMatcherFailure(e, real); } }; return(_real.Matches(TestActual.Of(thunk))); }