60 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: !stdlib=libc++ && (c++03 || c++11 || c++14)10 11// <string_view>12 13// constexpr basic_string_view& operator=(const basic_string_view &) noexcept = default;14 15#include <string_view>16#include <cassert>17 18#include "test_macros.h"19 20template <typename T>21#if TEST_STD_VER > 1122constexpr23#endif24 bool25 test(T sv0) {26 T sv1;27 sv1 = sv0;28 // We can't just say "sv0 == sv1" here because string_view::compare29 // isn't constexpr until C++17, and we want to support back to C++1430 return sv0.size() == sv1.size() && sv0.data() == sv1.data();31}32 33int main(int, char**) {34 assert(test<std::string_view>("1234"));35#ifndef TEST_HAS_NO_CHAR8_T36 assert(test<std::u8string_view>(u8"1234"));37#endif38#if TEST_STD_VER >= 1139 assert(test<std::u16string_view>(u"1234"));40 assert(test<std::u32string_view>(U"1234"));41#endif42#ifndef TEST_HAS_NO_WIDE_CHARACTERS43 assert(test<std::wstring_view>(L"1234"));44#endif45 46#if TEST_STD_VER > 1147 static_assert(test<std::string_view>({"abc", 3}), "");48# ifndef TEST_HAS_NO_CHAR8_T49 static_assert(test<std::u8string_view>({u8"abc", 3}), "");50# endif51 static_assert(test<std::u16string_view>({u"abc", 3}), "");52 static_assert(test<std::u32string_view>({U"abc", 3}), "");53# ifndef TEST_HAS_NO_WIDE_CHARACTERS54 static_assert(test<std::wstring_view>({L"abc", 3}), "");55# endif56#endif57 58 return 0;59}60