Mercurial > hg > CbC > CbC_gcc
view gcc/testsuite/g++.dg/cpp1z/fold1.C @ 131:84e7813d76e9
gcc-8.2
author | mir3636 |
---|---|
date | Thu, 25 Oct 2018 07:37:49 +0900 |
parents | 04ced10e8804 |
children |
line wrap: on
line source
// { dg-do run { target c++17 } } // { dg-options "" } #include <cassert> // Check the semantics of a couple of operations to make sure // that the expressions are formed correctly. #define COMMA , #define MAKE_FNS(name, op) \ template<typename... Ts> \ auto unary_left_ ## name (Ts... ts) { return (... op ts); } \ template<typename... Ts> \ auto unary_right_ ## name (Ts... ts) { return (ts op ...); } \ template<typename T, typename... Ts> \ auto binary_left_ ## name (T x, Ts... ts) { return (x op ... op ts); } \ template<typename T, typename... Ts> \ auto binary_right_ ## name (T x, Ts... ts) { return (ts op ... op x); } MAKE_FNS (add, +); MAKE_FNS (sub, -); int main() { // assert(unary_left_add() == 0); assert(unary_left_add(1) == 1); assert(unary_left_add(1, 2, 3) == 6); // assert(unary_right_add() == 0); assert(unary_right_add(1) == 1); assert(unary_right_add(1, 2, 3) == 6); assert(binary_left_add(1) == 1); assert(binary_left_add(1, 1) == 2); assert(binary_left_add(1, 1, 2, 3) == 7); assert(binary_right_add(1) == 1); assert(binary_right_add(1, 1) == 2); assert(binary_right_add(1, 1, 2, 3) == 7); // unary_left_sub(); // { dg-error "empty"} assert(unary_left_sub(1) == 1); assert(unary_left_sub(1, 2, 3) == -4); // unary_right_sub(); // { dg-error "empty"} assert(unary_right_sub(1) == 1); assert(unary_right_sub(1, 2, 3) == 2); assert(binary_left_sub(1) == 1); assert(binary_left_sub(1, 1) == 0); assert(binary_left_sub(1, 1, 2, 3) == -5); assert(binary_right_sub(1) == 1); assert(binary_right_sub(1, 1) == 0); assert(binary_right_sub(1, 1, 2, 3) == 1); }