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<wchar_t>12 13// static void assign(char_type& c1, const char_type& c2);14// constexpr in C++1715 16// UNSUPPORTED: no-wide-characters17 18#include <string>19#include <cassert>20 21#include "test_macros.h"22 23#if TEST_STD_VER > 1424constexpr bool test_constexpr() {25 wchar_t c = L'1';26 std::char_traits<wchar_t>::assign(c, L'a');27 return c == L'a';28}29#endif30 31int main(int, char**) {32 wchar_t c = L'\0';33 std::char_traits<wchar_t>::assign(c, L'a');34 assert(c == L'a');35 36#if TEST_STD_VER > 1437 static_assert(test_constexpr(), "");38#endif39 40 return 0;41}42