import TestLib; typedef real F1(string); typedef string F2(int); real f1(string s) { return length(s); } F2 f2 = operator ecast; StartTest("Function type parameters"); from 'template/imports/composeFunctions'(R=real, F1=F1, F2=F2, I=int) access compose; real r = compose(f1, f2)(1234567890); assert(r == 10); EndTest();