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 // class iterator 14 15 #include <cassert> 16 #include <concepts> 17 #include <iterator> 18 #include <string_view> 19 20 #include "test_macros.h" 21 #include "make_string.h" 22 23 template <class CharT> 24 TEST_CONSTEXPR_CXX14 void test_type() { 25 using C = std::basic_string_view<CharT>; 26 typename C::iterator ii1 = typename C::iterator(), ii2 = typename C::iterator(); 27 typename C::iterator ii4 = ii1; 28 typename C::const_iterator cii = typename C::const_iterator(); 29 assert(ii1 == ii2); 30 assert(ii1 == ii4); 31 assert(ii1 == cii); 32 33 assert(!(ii1 != ii2)); 34 assert(!(ii1 != cii)); 35 36 #if TEST_STD_VER >= 17 37 C c = MAKE_STRING_VIEW(CharT, "abc"); 38 assert(c.begin() == std::begin(c)); 39 assert(c.rbegin() == std::rbegin(c)); 40 assert(c.cbegin() == std::cbegin(c)); 41 assert(c.crbegin() == std::crbegin(c)); 42 43 assert(c.end() == std::end(c)); 44 assert(c.rend() == std::rend(c)); 45 assert(c.cend() == std::cend(c)); 46 assert(c.crend() == std::crend(c)); 47 48 assert(std::begin(c) != std::end(c)); 49 assert(std::rbegin(c) != std::rend(c)); 50 assert(std::cbegin(c) != std::cend(c)); 51 assert(std::crbegin(c) != std::crend(c)); 52 #endif 53 54 #if TEST_STD_VER >= 20 55 // P1614 + LWG3352 56 std::same_as<std::strong_ordering> decltype(auto) r1 = ii1 <=> ii2; 57 assert(r1 == std::strong_ordering::equal); 58 59 std::same_as<std::strong_ordering> decltype(auto) r2 = ii1 <=> ii2; 60 assert(r2 == std::strong_ordering::equal); 61 #endif 62 } 63 64 TEST_CONSTEXPR_CXX14 bool test() { 65 test_type<char>(); 66 #ifndef TEST_HAS_NO_WIDE_CHARACTERS 67 test_type<wchar_t>(); 68 #endif 69 #ifndef TEST_HAS_NO_CHAR8_T 70 test_type<char8_t>(); 71 #endif 72 test_type<char16_t>(); 73 test_type<char32_t>(); 74 75 return true; 76 } 77 78 int main(int, char**) { 79 test(); 80 #if TEST_STD_VER >= 14 81 static_assert(test(), ""); 82 #endif 83 84 return 0; 85 } 86