59 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// bitset<N>& flip(size_t pos); // constexpr since C++2310 11#include <bitset>12#include <cassert>13#include <cstddef>14#include <vector>15 16#include "../bitset_test_cases.h"17#include "test_macros.h"18 19template <std::size_t N>20TEST_CONSTEXPR_CXX23 void test_flip_one() {21 std::vector<std::bitset<N> > const cases = get_test_cases<N>();22 for (std::size_t c = 0; c != cases.size(); ++c) {23 std::bitset<N> v = cases[c];24 if (v.size() > 0) {25 std::size_t middle = v.size() / 2;26 v.flip(middle);27 bool b = v[middle];28 assert(v[middle] == b);29 v.flip(middle);30 assert(v[middle] != b);31 v.flip(middle);32 assert(v[middle] == b);33 }34 }35}36 37TEST_CONSTEXPR_CXX23 bool test() {38 test_flip_one<0>();39 test_flip_one<1>();40 test_flip_one<31>();41 test_flip_one<32>();42 test_flip_one<33>();43 test_flip_one<63>();44 test_flip_one<64>();45 test_flip_one<65>();46 47 return true;48}49 50int main(int, char**) {51 test();52 test_flip_one<1000>(); // not in constexpr because of constexpr evaluation step limits53#if TEST_STD_VER > 2054 static_assert(test());55#endif56 57 return 0;58}59