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 // size_t count() 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_count()20TEST_CONSTEXPR_CXX23 void test_count() { 21 std::vector<std::bitset<N> > const cases = get_test_cases<N>(); 22 for (std::size_t c = 0; c != cases.size(); ++c) { 23 const std::bitset<N> v = cases[c]; 24 std::size_t c1 = v.count(); 25 std::size_t c2 = 0; 26 for (std::size_t i = 0; i < v.size(); ++i) 27 if (v[i]) 28 ++c2; 29 assert(c1 == c2); 30 } 31 } 32 test()33TEST_CONSTEXPR_CXX23 bool test() { 34 test_count<0>(); 35 test_count<1>(); 36 test_count<31>(); 37 test_count<32>(); 38 test_count<33>(); 39 test_count<63>(); 40 test_count<64>(); 41 test_count<65>(); 42 43 return true; 44 } 45 main(int,char **)46int main(int, char**) { 47 test(); 48 test_count<1000>(); // not in constexpr because of constexpr evaluation step limits 49 #if TEST_STD_VER > 20 50 static_assert(test()); 51 #endif 52 53 return 0; 54 } 55