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-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 // bool none() const; // constexpr since C++23 10 11 #include <bitset> 12 #include <cassert> 13 #include <cstddef> 14 15 #include "test_macros.h" 16 17 template <std::size_t N> test_none()18TEST_CONSTEXPR_CXX23 void test_none() { 19 std::bitset<N> v; 20 v.reset(); 21 assert(v.none() == true); 22 v.set(); 23 assert(v.none() == (N == 0)); 24 if (v.size() > 1) { 25 v[N/2] = false; 26 assert(v.none() == false); 27 v.reset(); 28 v[N/2] = true; 29 assert(v.none() == false); 30 } 31 } 32 test()33TEST_CONSTEXPR_CXX23 bool test() { 34 test_none<0>(); 35 test_none<1>(); 36 test_none<31>(); 37 test_none<32>(); 38 test_none<33>(); 39 test_none<63>(); 40 test_none<64>(); 41 test_none<65>(); 42 test_none<1000>(); 43 44 return true; 45 } 46 main(int,char **)47int main(int, char**) { 48 test(); 49 #if TEST_STD_VER > 20 50 static_assert(test()); 51 #endif 52 53 return 0; 54 } 55