39 lines · cpp
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-exception6//7//===----------------------------------------------------------------------===//8// UNSUPPORTED: c++03, c++11, c++14, c++179 10// <string>11 12// template<> struct char_traits<char8_t>13 14// static constexpr size_t length(const char_type* s);15 16#include <string>17#include <cassert>18 19#include "test_macros.h"20 21#ifndef TEST_HAS_NO_CHAR8_T22constexpr bool test_constexpr() {23 return std::char_traits<char8_t>::length(u8"") == 0 && std::char_traits<char8_t>::length(u8"abcd") == 4;24}25 26int main(int, char**) {27 assert(std::char_traits<char8_t>::length(u8"") == 0);28 assert(std::char_traits<char8_t>::length(u8"a") == 1);29 assert(std::char_traits<char8_t>::length(u8"aa") == 2);30 assert(std::char_traits<char8_t>::length(u8"aaa") == 3);31 assert(std::char_traits<char8_t>::length(u8"aaaa") == 4);32 33 static_assert(test_constexpr(), "");34 return 0;35}36#else37int main(int, char**) { return 0; }38#endif39