31 lines · cpp
1//===----------------------------------------------------------------------===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8 9// UNSUPPORTED: c++0310 11// <type_traits>12 13 14#include <type_traits>15#include <cassert>16 17#include "test_macros.h"18 19int main(int, char**)20{21#ifndef __cpp_lib_is_constant_evaluated22 // expected-error@+1 {{no member named 'is_constant_evaluated' in namespace 'std'}}23 bool b = std::is_constant_evaluated();24#else25 // expected-error@+1 {{static assertion failed}}26 static_assert(!std::is_constant_evaluated(), "");27 // expected-warning@-1 0-1 {{'std::is_constant_evaluated' will always evaluate to 'true' in a manifestly constant-evaluated expression}}28#endif29 return 0;30}31