44 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// <string>10 11// template<> struct char_traits<wchar_t>12 13// static char_type* copy(char_type* s1, const char_type* s2, size_t n);14 15// UNSUPPORTED: no-wide-characters16 17#include <string>18#include <cassert>19 20#include "test_macros.h"21 22TEST_CONSTEXPR_CXX20 bool test() {23 wchar_t s1[] = {1, 2, 3};24 wchar_t s2[3] = {0};25 assert(std::char_traits<wchar_t>::copy(s2, s1, 3) == s2);26 assert(s2[0] == wchar_t(1));27 assert(s2[1] == wchar_t(2));28 assert(s2[2] == wchar_t(3));29 assert(std::char_traits<wchar_t>::copy(NULL, s1, 0) == NULL);30 assert(std::char_traits<wchar_t>::copy(s1, NULL, 0) == s1);31 32 return true;33}34 35int main(int, char**) {36 test();37 38#if TEST_STD_VER > 1739 static_assert(test());40#endif41 42 return 0;43}44