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 // <vector> 10 11 #include <cassert> 12 #include <vector> 13 14 #include "test_macros.h" 15 test()16TEST_CONSTEXPR_CXX20 bool test() { 17 using CRefT = std::vector<bool>::const_reference; 18 #if !defined(_LIBCPP_VERSION) || defined(_LIBCPP_ABI_BITSET_VECTOR_BOOL_CONST_SUBSCRIPT_RETURN_BOOL) 19 ASSERT_SAME_TYPE(CRefT, bool); 20 #else 21 ASSERT_SAME_TYPE(CRefT, std::__bit_const_reference<std::vector<bool> >); 22 std::vector<bool> vec; 23 vec.push_back(true); 24 CRefT ref = vec[0]; 25 assert(ref); 26 vec[0] = false; 27 assert(!ref); 28 #endif 29 30 return true; 31 } 32 main(int,char **)33int main(int, char**) { 34 test(); 35 #if TEST_STD_VER > 17 36 static_assert(test()); 37 #endif 38 39 return 0; 40 } 41