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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
// UNSUPPORTED: libcpp-has-no-incomplete-ranges
// template <class R, class P>
// lazy_split_view(R&&, P&&) -> lazy_split_view<views::all_t<R>, views::all_t<P>>;
//
// template <input_range R>
// lazy_split_view(R&&, range_value_t<R>) -> lazy_split_view<views::all_t<R>, single_view<range_value_t<R>>>;
#include <ranges>
#include <concepts>
#include <type_traits>
#include <utility>
#include "types.h"
struct ForwardRange {
forward_iterator<const char*> begin() const;
forward_iterator<const char*> end() const;
};
static_assert( std::ranges::forward_range<ForwardRange>);
struct InputRange {
cpp20_input_iterator<const char*> begin() const;
sentinel_wrapper<cpp20_input_iterator<const char*>> end() const;
};
static_assert(std::ranges::input_range<InputRange>);
template <class I1, class I2, class ExpectedView, class ExpectedPattern>
constexpr void test() {
I1 i1{};
I2 i2{};
std::ranges::lazy_split_view v(std::move(i1), std::move(i2));
static_assert(std::same_as<decltype(v), std::ranges::lazy_split_view<ExpectedView, ExpectedPattern>>);
using O = decltype(std::move(v).base());
static_assert(std::same_as<O, ExpectedView>);
}
constexpr void testCtad() {
// (Range, Pattern)
test<ForwardView, ForwardView, ForwardView, ForwardView>();
test<ForwardRange, ForwardRange, std::ranges::views::all_t<ForwardRange>, std::ranges::views::all_t<ForwardRange>>();
// (Range, RangeElement)
test<ForwardRange, char, std::ranges::views::all_t<ForwardRange>, std::ranges::single_view<char>>();
test<InputRange, char, std::ranges::views::all_t<InputRange>, std::ranges::single_view<char>>();
// (Range, RangeElement) with implicit conversion.
test<ForwardRange, bool, std::ranges::views::all_t<ForwardRange>, std::ranges::single_view<char>>();
test<InputRange, bool, std::ranges::views::all_t<InputRange>, std::ranges::single_view<char>>();
// Note: CTAD from (InputRange, ForwardTinyRange) doesn't work -- the deduction guide wraps the pattern in
// `views::all_t`, resulting in `views::owning_view<ForwardTinyRange>`. That type would never satisfy `tiny-range`
// because `views::owning_view` contains a member function `size()` that shadows the static `size()` in
// `ForwardTinyRange`.
}
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