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 20 template <typename T> test()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 main(int,char **)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