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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 outer-iterator& outer-iterator::operator++();
// constexpr decltype(auto) outer-iterator::operator++(int);
// Note that corner cases are tested in `range.lazy.split/general.pass.cpp`.
#include <ranges>
#include <algorithm>
#include <cassert>
#include <string>
#include "../types.h"
constexpr bool test() {
using namespace std::string_literals;
// Can call `outer-iterator::operator++`; `View` is a forward range.
{
SplitViewForward v("abc def ghi", " ");
// ++i
{
auto i = v.begin();
assert(std::ranges::equal(*i, "abc"s));
decltype(auto) i2 = ++i;
static_assert(std::is_lvalue_reference_v<decltype(i2)>);
assert(&i2 == &i);
assert(std::ranges::equal(*i2, "def"s));
}
// i++
{
auto i = v.begin();
assert(std::ranges::equal(*i, "abc"s));
decltype(auto) i2 = i++;
static_assert(!std::is_reference_v<decltype(i2)>);
assert(std::ranges::equal(*i2, "abc"s));
assert(std::ranges::equal(*i, "def"s));
}
}
// Can call `outer-iterator::operator++`; `View` is an input range.
{
SplitViewInput v("abc def ghi", ' ');
// ++i
{
auto i = v.begin();
assert(std::ranges::equal(*i, "abc"s));
decltype(auto) i2 = ++i;
static_assert(std::is_lvalue_reference_v<decltype(i2)>);
assert(&i2 == &i);
assert(std::ranges::equal(*i2, "def"s));
}
// i++
{
auto i = v.begin();
assert(std::ranges::equal(*i, "abc"s));
static_assert(std::is_void_v<decltype(i++)>);
i++;
assert(std::ranges::equal(*i, "def"s));
}
}
return true;
}
int main(int, char**) {
test();
static_assert(test());
return 0;
}
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