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: no-localization 10 // UNSUPPORTED: c++03, c++11, c++14, c++17 11 12 // iterator& operator++(); 13 // void operator++(int); 14 15 #include <cassert> 16 #include <ranges> 17 #include <sstream> 18 19 #include "test_macros.h" 20 #include "../utils.h" 21 22 template <class CharT> test()23void test() { 24 // operator ++() 25 { 26 auto iss = make_string_stream<CharT>("1 2 345 "); 27 std::ranges::basic_istream_view<int, CharT> isv{iss}; 28 auto it = isv.begin(); 29 assert(*it == 1); 30 31 std::same_as<decltype(it)&> decltype(auto) it2 = ++it; 32 assert(&it2 == &it); 33 assert(*it2 == 2); 34 35 ++it2; 36 assert(*it2 == 345); 37 38 ++it2; 39 assert(it2 == isv.end()); 40 } 41 42 // operator ++(int) 43 { 44 auto iss = make_string_stream<CharT>("1 2 345 "); 45 std::ranges::basic_istream_view<int, CharT> isv{iss}; 46 auto it = isv.begin(); 47 assert(*it == 1); 48 49 static_assert(std::same_as<decltype(it++), void>); 50 it++; 51 assert(*it == 2); 52 } 53 } 54 main(int,char **)55int main(int, char**) { 56 test<char>(); 57 #ifndef TEST_HAS_NO_WIDE_CHARACTERS 58 test<wchar_t>(); 59 #endif 60 61 return 0; 62 } 63