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-exception
6//
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(s: "QBCDE", sz: 5);
36 test("QBCDE", 2);
37 test("", 0);
38#if TEST_STD_VER > 11
39 {
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#endif
46
47#ifndef TEST_HAS_NO_WIDE_CHARACTERS
48 test(L"QBCDE", 5);
49 test(L"QBCDE", 2);
50 test(L"", 0);
51# if TEST_STD_VER > 11
52 {
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# endif
59#endif // TEST_HAS_NO_WIDE_CHARACTERS
60
61#if TEST_STD_VER >= 11
62 test(u"QBCDE", 5);
63 test(u"QBCDE", 2);
64 test(u"", 0);
65# if TEST_STD_VER > 11
66 {
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# endif
73
74 test(U"QBCDE", 5);
75 test(U"QBCDE", 2);
76 test(U"", 0);
77# if TEST_STD_VER > 11
78 {
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# endif
85#endif
86
87 return 0;
88}
89

source code of libcxx/test/std/strings/string.view/string.view.cons/from_ptr_len.pass.cpp