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 // <string_view> 10 11 // constexpr basic_string_view& operator=(const basic_string_view &) noexcept = default; 12 13 #include <string_view> 14 #include <cassert> 15 16 #include "test_macros.h" 17 18 template<typename T> 19 #if TEST_STD_VER > 11 20 constexpr 21 #endif 22 bool test (T sv0) 23 { 24 T sv1; 25 sv1 = sv0; 26 // We can't just say "sv0 == sv1" here because string_view::compare 27 // isn't constexpr until C++17, and we want to support back to C++14 28 return sv0.size() == sv1.size() && sv0.data() == sv1.data(); 29 } 30 31 int main(int, char**) { 32 33 assert( test<std::string_view> ( "1234")); 34 #if defined(__cpp_lib_char8_t) && __cpp_lib_char8_t >= 201811L 35 assert( test<std::u8string_view> (u8"1234")); 36 #endif 37 #if TEST_STD_VER >= 11 38 #ifndef _LIBCPP_HAS_NO_UNICODE_CHARS 39 assert( test<std::u16string_view> ( u"1234")); 40 assert( test<std::u32string_view> ( U"1234")); 41 #endif 42 #endif 43 assert( test<std::wstring_view> ( L"1234")); 44 45 #if TEST_STD_VER > 11 46 static_assert( test<std::string_view> ({ "abc", 3}), ""); 47 #if defined(__cpp_lib_char8_t) && __cpp_lib_char8_t >= 201811L 48 static_assert( test<std::u8string_view> ({u8"abc", 3}), ""); 49 #endif 50 #ifndef _LIBCPP_HAS_NO_UNICODE_CHARS 51 static_assert( test<std::u16string_view> ({ u"abc", 3}), ""); 52 static_assert( test<std::u32string_view> ({ U"abc", 3}), ""); 53 #endif 54 static_assert( test<std::wstring_view> ({ L"abc", 3}), ""); 55 #endif 56 57 return 0; 58 } 59