48 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// std::views::istream<T>13 14#include <cassert>15#include <ranges>16#include <sstream>17#include <type_traits>18 19#include "test_macros.h"20#include "utils.h"21 22static_assert(!std::is_invocable_v<decltype((std::views::istream<int>))>);23static_assert(std::is_invocable_v<decltype((std::views::istream<int>)), std::istream&>);24static_assert(!std::is_invocable_v<decltype((std::views::istream<int>)), const std::istream&>);25static_assert(!std::is_invocable_v<decltype((std::views::istream<int>)), int>);26 27#ifndef TEST_HAS_NO_WIDE_CHARACTERS28static_assert(std::is_invocable_v<decltype((std::views::istream<int>)), std::wistream&>);29static_assert(!std::is_invocable_v<decltype((std::views::istream<int>)), const std::wistream&>);30#endif31 32template <class CharT>33void test() {34 auto iss = make_string_stream<CharT>("12 3");35 auto isv = std::views::istream<int>(iss);36 auto it = isv.begin();37 assert(*it == 12);38}39 40int main(int, char**) {41 test<char>();42#ifndef TEST_HAS_NO_WIDE_CHARACTERS43 test<wchar_t>();44#endif45 46 return 0;47}48