89 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(const _CharT* _s, size_type _len)14// : __data (_s), __size(_len) {}15 16#include <string_view>17#include <string>18#include <cassert>19 20#include "test_macros.h"21 22template <typename CharT>23void test(const CharT* s, std::size_t sz) {24 {25 typedef std::basic_string_view<CharT> SV;26 LIBCPP_ASSERT_NOEXCEPT(SV(s, sz));27 28 SV sv1(s, sz);29 assert(sv1.size() == sz);30 assert(sv1.data() == s);31 }32}33 34int main(int, char**) {35 test("QBCDE", 5);36 test("QBCDE", 2);37 test("", 0);38#if TEST_STD_VER > 1139 {40 constexpr const char* s = "QBCDE";41 constexpr std::basic_string_view<char> sv1(s, 2);42 static_assert(sv1.size() == 2, "");43 static_assert(sv1.data() == s, "");44 }45#endif46 47#ifndef TEST_HAS_NO_WIDE_CHARACTERS48 test(L"QBCDE", 5);49 test(L"QBCDE", 2);50 test(L"", 0);51# if TEST_STD_VER > 1152 {53 constexpr const wchar_t* s = L"QBCDE";54 constexpr std::basic_string_view<wchar_t> sv1(s, 2);55 static_assert(sv1.size() == 2, "");56 static_assert(sv1.data() == s, "");57 }58# endif59#endif // TEST_HAS_NO_WIDE_CHARACTERS60 61#if TEST_STD_VER >= 1162 test(u"QBCDE", 5);63 test(u"QBCDE", 2);64 test(u"", 0);65# if TEST_STD_VER > 1166 {67 constexpr const char16_t* s = u"QBCDE";68 constexpr std::basic_string_view<char16_t> sv1(s, 2);69 static_assert(sv1.size() == 2, "");70 static_assert(sv1.data() == s, "");71 }72# endif73 74 test(U"QBCDE", 5);75 test(U"QBCDE", 2);76 test(U"", 0);77# if TEST_STD_VER > 1178 {79 constexpr const char32_t* s = U"QBCDE";80 constexpr std::basic_string_view<char32_t> sv1(s, 2);81 static_assert(sv1.size() == 2, "");82 static_assert(sv1.data() == s, "");83 }84# endif85#endif86 87 return 0;88}89