46 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 9// UNSUPPORTED: c++03, c++11, c++14, c++1710 11// <string>12 13// template<> struct char_traits<char8_t>14 15// static char_type* copy(char_type* s1, const char_type* s2, size_t n);16 17#include <string>18#include <cassert>19 20#include "test_macros.h"21 22TEST_CONSTEXPR_CXX20 bool test() {23#ifndef TEST_HAS_NO_CHAR8_T24 char8_t s1[] = {1, 2, 3};25 char8_t s2[3] = {0};26 assert(std::char_traits<char8_t>::copy(s2, s1, 3) == s2);27 assert(s2[0] == char8_t(1));28 assert(s2[1] == char8_t(2));29 assert(s2[2] == char8_t(3));30 assert(std::char_traits<char8_t>::copy(NULL, s1, 0) == NULL);31 assert(std::char_traits<char8_t>::copy(s1, NULL, 0) == s1);32#endif33 34 return true;35}36 37int main(int, char**) {38 test();39 40#if TEST_STD_VER > 1741 static_assert(test());42#endif43 44 return 0;45}46