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 21 template <std::size_t N> test_right_shift()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 main(int,char **)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