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// ADDITIONAL_COMPILE_FLAGS(has-fconstexpr-steps): -fconstexpr-steps=15000000
10
11// bitset<N>& operator<<=(size_t pos); // constexpr since C++23
12
13#include <bitset>
14#include <cassert>
15#include <cstddef>
16#include <vector>
17
18#include "../bitset_test_cases.h"
19#include "test_macros.h"
20
21template <std::size_t N>
22TEST_CONSTEXPR_CXX23 bool test_right_shift() {
23 std::vector<std::bitset<N> > const cases = get_test_cases<N>();
24 for (std::size_t c = 0; c != cases.size(); ++c) {
25 for (std::size_t s = 0; s <= N+1; ++s) {
26 std::bitset<N> v1 = cases[c];
27 std::bitset<N> v2 = v1;
28 v1 >>= s;
29 for (std::size_t i = 0; i < v1.size(); ++i)
30 if (i + s < v1.size())
31 assert(v1[i] == v2[i + s]);
32 else
33 assert(v1[i] == 0);
34 }
35 }
36 return true;
37}
38
39int main(int, char**) {
40 test_right_shift<0>();
41 test_right_shift<1>();
42 test_right_shift<31>();
43 test_right_shift<32>();
44 test_right_shift<33>();
45 test_right_shift<63>();
46 test_right_shift<64>();
47 test_right_shift<65>();
48 test_right_shift<1000>(); // not in constexpr because of constexpr evaluation step limits
49#if TEST_STD_VER > 20
50 static_assert(test_right_shift<0>());
51 static_assert(test_right_shift<1>());
52 static_assert(test_right_shift<31>());
53 static_assert(test_right_shift<32>());
54 static_assert(test_right_shift<33>());
55 static_assert(test_right_shift<63>());
56 static_assert(test_right_shift<64>());
57 static_assert(test_right_shift<65>());
58#endif
59
60 return 0;
61}
62

source code of libcxx/test/std/utilities/template.bitset/bitset.members/right_shift_eq.pass.cpp