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// <string>10 11// template<> struct char_traits<char16_t>12 13// static char_type* move(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 assert(std::char_traits<char16_t>::move(s1, s1 + 1, 2) == s1);23 assert(s1[0] == char16_t(2));24 assert(s1[1] == char16_t(3));25 assert(s1[2] == char16_t(3));26 s1[2] = char16_t(0);27 assert(std::char_traits<char16_t>::move(s1 + 1, s1, 2) == s1 + 1);28 assert(s1[0] == char16_t(2));29 assert(s1[1] == char16_t(2));30 assert(s1[2] == char16_t(3));31 assert(std::char_traits<char16_t>::move(NULL, s1, 0) == NULL);32 assert(std::char_traits<char16_t>::move(s1, NULL, 0) == s1);33 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