forked from OSchip/llvm-project
73 lines
1.8 KiB
C++
73 lines
1.8 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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// UNSUPPORTED: c++03, c++11, c++14, c++17
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// constexpr decltype(auto) inner-iterator::operator*() const;
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#include <ranges>
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#include "../types.h"
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constexpr bool test() {
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// Can call `inner-iterator::operator*`; `View` is a forward range.
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{
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SplitViewDiff v("abc def", " ");
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auto val = *v.begin();
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// Non-const iterator.
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{
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auto i = val.begin();
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static_assert(std::same_as<decltype(*i), char&>);
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assert(*i == 'a');
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assert(*(++i) == 'b');
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assert(*(++i) == 'c');
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}
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// Const iterator.
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{
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const auto ci = val.begin();
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static_assert(std::same_as<decltype(*ci), char&>);
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assert(*ci == 'a');
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}
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}
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// Can call `inner-iterator::operator*`; `View` is an input range.
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{
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SplitViewInput v("abc def", ' ');
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auto val = *v.begin();
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// Non-const iterator.
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{
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auto i = val.begin();
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static_assert(std::same_as<decltype(*i), char&>);
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assert(*i == 'a');
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assert(*(++i) == 'b');
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assert(*(++i) == 'c');
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}
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// Const iterator.
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{
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const auto ci = val.begin();
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static_assert(std::same_as<decltype(*ci), char&>);
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// Note: when the underlying range is an input range, `current` is stored in the `lazy_split_view` itself and
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// shared between `inner-iterator`s. Consequently, incrementing one iterator effectively increments all of them.
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assert(*ci == 'c');
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}
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}
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return true;
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}
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int main(int, char**) {
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test();
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static_assert(test());
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return 0;
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}
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