50 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* move(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 assert(std::char_traits<char8_t>::move(s1, s1 + 1, 2) == s1);26 assert(s1[0] == char8_t(2));27 assert(s1[1] == char8_t(3));28 assert(s1[2] == char8_t(3));29 s1[2] = char8_t(0);30 assert(std::char_traits<char8_t>::move(s1 + 1, s1, 2) == s1 + 1);31 assert(s1[0] == char8_t(2));32 assert(s1[1] == char8_t(2));33 assert(s1[2] == char8_t(3));34 assert(std::char_traits<char8_t>::move(NULL, s1, 0) == NULL);35 assert(std::char_traits<char8_t>::move(s1, NULL, 0) == s1);36#endif37 38 return true;39}40 41int main(int, char**) {42 test();43 44#if TEST_STD_VER > 1745 static_assert(test());46#endif47 48 return 0;49}50