42 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<char16_t>12 13// static char_type* copy(char_type* s1, const char_type* s2, size_t n);14 15#include <string>16#include <cassert>17 18#include "test_macros.h"19 20TEST_CONSTEXPR_CXX20 bool test() {21 char16_t s1[] = {1, 2, 3};22 char16_t s2[3] = {0};23 assert(std::char_traits<char16_t>::copy(s2, s1, 3) == s2);24 assert(s2[0] == char16_t(1));25 assert(s2[1] == char16_t(2));26 assert(s2[2] == char16_t(3));27 assert(std::char_traits<char16_t>::copy(NULL, s1, 0) == NULL);28 assert(std::char_traits<char16_t>::copy(s1, NULL, 0) == s1);29 30 return true;31}32 33int main(int, char**) {34 test();35 36#if TEST_STD_VER > 1737 static_assert(test());38#endif39 40 return 0;41}42