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: c++03, c++11, c++14, c++1710 11// constexpr value_type operator*() const;12// Effects: Equivalent to return {cur_, next_.begin()};13 14#include <cassert>15#include <ranges>16 17#include "../types.h"18 19struct Iter : ForwardIterBase<Iter> {20 int i;21 constexpr Iter() = default;22 constexpr Iter(int ii) : i(ii) {}23};24 25constexpr bool test() {26 using SplitView = std::ranges::split_view<std::ranges::subrange<Iter>, std::ranges::subrange<Iter>>;27 using SplitIter = std::ranges::iterator_t<SplitView>;28 29 {30 SplitView sv;31 Iter current{5};32 std::ranges::subrange next{Iter{6}, Iter{7}};33 const SplitIter it{sv, current, next};34 std::same_as<std::ranges::subrange<Iter>> decltype(auto) value = *it;35 assert(value.begin().i == 5);36 assert(value.end().i == 6);37 }38 39 return true;40}41 42int main(int, char**) {43 test();44 static_assert(test());45 46 return 0;47}48