xref: /llvm-project/libcxx/test/std/utilities/template.bitset/bitset.members/right_shift.pass.cpp (revision f02120fba28f2352fd9396683892fc6671caa137)
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 // bitset<N> operator>>(size_t pos) const; // constexpr since C++23
10 
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 
19 template <std::size_t N>
test_right_shift()20 TEST_CONSTEXPR_CXX23 bool test_right_shift() {
21     std::vector<std::bitset<N> > const cases = get_test_cases<N>();
22     for (std::size_t c = 0; c != cases.size(); ++c) {
23         for (std::size_t s = 0; s <= N+1; ++s) {
24             std::bitset<N> v1 = cases[c];
25             std::bitset<N> v2 = v1;
26             assert((v1 >>= s) == (v2 >> s));
27         }
28     }
29     return true;
30 }
31 
main(int,char **)32 int main(int, char**) {
33   test_right_shift<0>();
34   test_right_shift<1>();
35   test_right_shift<31>();
36   test_right_shift<32>();
37   test_right_shift<33>();
38   test_right_shift<63>();
39   test_right_shift<64>();
40   test_right_shift<65>();
41   test_right_shift<1000>(); // not in constexpr because of constexpr evaluation step limits
42 #if TEST_STD_VER > 20
43   static_assert(test_right_shift<0>());
44   static_assert(test_right_shift<1>());
45   static_assert(test_right_shift<31>());
46   static_assert(test_right_shift<32>());
47   static_assert(test_right_shift<33>());
48   static_assert(test_right_shift<63>());
49   static_assert(test_right_shift<64>());
50   static_assert(test_right_shift<65>());
51 #endif
52 
53   return 0;
54 }
55