52 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 () 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 > 1123 {24 ASSERT_NOEXCEPT(T());25 26 constexpr T sv1;27 static_assert(sv1.size() == 0, "");28 static_assert(sv1.empty(), "");29 }30#endif31 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_T43 test<std::u8string_view>();44#endif45 test<std::u32string_view>();46#ifndef TEST_HAS_NO_WIDE_CHARACTERS47 test<std::wstring_view>();48#endif49 50 return 0;51}52