76 lines
2.1 KiB
C++
76 lines
2.1 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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// bitset<N>::reference operator[](size_t pos); // constexpr since C++23
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#include <bitset>
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#include <cassert>
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#include <cstddef>
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#include <vector>
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#include "../bitset_test_cases.h"
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#include "test_macros.h"
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template <std::size_t N>
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TEST_CONSTEXPR_CXX23 void test_index() {
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std::vector<std::bitset<N> > const cases = get_test_cases<N>();
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for (std::size_t c = 0; c != cases.size(); ++c) {
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std::bitset<N> v1 = cases[c];
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if (v1.size() > 0) {
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assert(v1[N/2] == v1.test(N/2));
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typename std::bitset<N>::reference r = v1[N/2];
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assert(r == v1.test(N/2));
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typename std::bitset<N>::reference r2 = v1[N/2];
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r = r2;
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assert(r == v1.test(N/2));
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r = false;
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assert(r == false);
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assert(v1.test(N/2) == false);
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r = true;
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assert(r == true);
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assert(v1.test(N/2) == true);
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bool b = ~r;
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assert(r == true);
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assert(v1.test(N/2) == true);
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assert(b == false);
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r.flip();
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assert(r == false);
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assert(v1.test(N/2) == false);
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}
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ASSERT_SAME_TYPE(decltype(v1[0]), typename std::bitset<N>::reference);
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}
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}
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TEST_CONSTEXPR_CXX23 bool test() {
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test_index<0>();
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test_index<1>();
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test_index<31>();
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test_index<32>();
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test_index<33>();
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test_index<63>();
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test_index<64>();
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test_index<65>();
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std::bitset<1> set;
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set[0] = false;
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auto b = set[0];
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set[0] = true;
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assert(b);
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return true;
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}
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int main(int, char**) {
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test();
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test_index<1000>(); // not in constexpr because of constexpr evaluation step limits
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#if TEST_STD_VER > 20
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static_assert(test());
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#endif
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return 0;
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}
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