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 // template<class Allocator> 14 // basic_string_view(const basic_string<_CharT, _Traits, Allocator>& _str) noexcept 15 16 #include <string_view> 17 #include <string> 18 #include <cassert> 19 20 #include "test_macros.h" 21 22 struct dummy_char_traits : public std::char_traits<char> {}; 23 24 template<typename CharT, typename Traits> 25 void test ( const std::basic_string<CharT, Traits> &str ) { 26 typedef std::basic_string_view<CharT, Traits> SV; 27 ASSERT_NOEXCEPT(SV(str)); 28 29 SV sv1 ( str ); 30 assert ( sv1.size() == str.size()); 31 assert ( sv1.data() == str.data()); 32 } 33 34 int main(int, char**) { 35 36 test ( std::string("QBCDE") ); 37 test ( std::string("") ); 38 test ( std::string() ); 39 40 #ifndef TEST_HAS_NO_WIDE_CHARACTERS 41 test ( std::wstring(L"QBCDE") ); 42 test ( std::wstring(L"") ); 43 test ( std::wstring() ); 44 #endif 45 46 #if defined(__cpp_lib_char8_t) && __cpp_lib_char8_t >= 201811L 47 test ( std::u8string{u8"QBCDE"} ); 48 test ( std::u8string{u8""} ); 49 test ( std::u8string{} ); 50 #endif 51 52 #if TEST_STD_VER >= 11 53 test ( std::u16string{u"QBCDE"} ); 54 test ( std::u16string{u""} ); 55 test ( std::u16string{} ); 56 57 test ( std::u32string{U"QBCDE"} ); 58 test ( std::u32string{U""} ); 59 test ( std::u32string{} ); 60 #endif 61 62 test ( std::basic_string<char, dummy_char_traits>("QBCDE") ); 63 test ( std::basic_string<char, dummy_char_traits>("") ); 64 test ( std::basic_string<char, dummy_char_traits>() ); 65 66 67 return 0; 68 } 69