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