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 () noexcept;
14
15#include <string_view>
16#include <cassert>
17
18#include "test_macros.h"
19
20template <typename T>
21void test() {
22#if TEST_STD_VER > 11
23 {
24 ASSERT_NOEXCEPT(T());
25
26 constexpr T sv1;
27 static_assert(sv1.size() == 0, "");
28 static_assert(sv1.empty(), "");
29 }
30#endif
31
32 {
33 T sv1;
34 assert(sv1.size() == 0);
35 assert(sv1.empty());
36 }
37}
38
39int main(int, char**) {
40 test<std::string_view>();
41 test<std::u16string_view>();
42#ifndef TEST_HAS_NO_CHAR8_T
43 test<std::u8string_view>();
44#endif
45 test<std::u32string_view>();
46#ifndef TEST_HAS_NO_WIDE_CHARACTERS
47 test<std::wstring_view>();
48#endif
49
50 return 0;
51}
52

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