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& operator=(const basic_string_view &) noexcept = default; 14 15 #include <string_view> 16 #include <cassert> 17 18 #include "test_macros.h" 19 20 template<typename T> 21 #if TEST_STD_VER > 11 22 constexpr 23 #endif 24 bool test (T sv0) 25 { 26 T sv1; 27 sv1 = sv0; 28 // We can't just say "sv0 == sv1" here because string_view::compare 29 // isn't constexpr until C++17, and we want to support back to C++14 30 return sv0.size() == sv1.size() && sv0.data() == sv1.data(); 31 } 32 33 int main(int, char**) { 34 35 assert( test<std::string_view> ( "1234")); 36 #if defined(__cpp_lib_char8_t) && __cpp_lib_char8_t >= 201811L 37 assert( test<std::u8string_view> (u8"1234")); 38 #endif 39 #if TEST_STD_VER >= 11 40 # ifndef TEST_HAS_NO_UNICODE_CHARS 41 assert( test<std::u16string_view> ( u"1234")); 42 assert( test<std::u32string_view> ( U"1234")); 43 # endif 44 #endif 45 #ifndef TEST_HAS_NO_WIDE_CHARACTERS 46 assert( test<std::wstring_view> ( L"1234")); 47 #endif 48 49 #if TEST_STD_VER > 11 50 static_assert( test<std::string_view> ({ "abc", 3}), ""); 51 # if defined(__cpp_lib_char8_t) && __cpp_lib_char8_t >= 201811L 52 static_assert( test<std::u8string_view> ({u8"abc", 3}), ""); 53 # endif 54 # ifndef TEST_HAS_NO_UNICODE_CHARS 55 static_assert( test<std::u16string_view> ({ u"abc", 3}), ""); 56 static_assert( test<std::u32string_view> ({ U"abc", 3}), ""); 57 # endif 58 # ifndef TEST_HAS_NO_WIDE_CHARACTERS 59 static_assert( test<std::wstring_view> ({ L"abc", 3}), ""); 60 # endif 61 #endif 62 63 return 0; 64 } 65