63 lines · cpp
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-exception6//7//===----------------------------------------------------------------------===//8 9// UNSUPPORTED: no-localization10// UNSUPPORTED: c++03, c++11, c++14, c++1711 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 22template <class CharT>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 55int main(int, char**) {56 test<char>();57#ifndef TEST_HAS_NO_WIDE_CHARACTERS58 test<wchar_t>();59#endif60 61 return 0;62}63