On Friday, 29 September 2017 at 01:51:36 UTC, Jerry wrote: > [...] Maybe this? ref auto at(T : U[], U)(T arr, size_t index) { return arr[index]; } int main(string[] argv) { int* a = new int(1); int[] b = [1]; int[1] c = [1]; a.at(0); // won't compile b.at(0); c.at(0); reutnr 0; }