| //===----------------------------------------------------------------------===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| // UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14) |
| |
| // <string_view> |
| |
| // constexpr basic_string_view () noexcept; |
| |
| #include <string_view> |
| #include <cassert> |
| |
| #include "test_macros.h" |
| |
| template <typename T> |
| void test() { |
| #if TEST_STD_VER > 11 |
| { |
| ASSERT_NOEXCEPT(T()); |
| |
| constexpr T sv1; |
| static_assert(sv1.size() == 0, ""); |
| static_assert(sv1.empty(), ""); |
| } |
| #endif |
| |
| { |
| T sv1; |
| assert(sv1.size() == 0); |
| assert(sv1.empty()); |
| } |
| } |
| |
| int main(int, char**) { |
| test<std::string_view>(); |
| test<std::u16string_view>(); |
| #ifndef TEST_HAS_NO_CHAR8_T |
| test<std::u8string_view>(); |
| #endif |
| test<std::u32string_view>(); |
| #ifndef TEST_HAS_NO_WIDE_CHARACTERS |
| test<std::wstring_view>(); |
| #endif |
| |
| return 0; |
| } |