52 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// template <class R, class P>12// split_view(R&&, P&&) -> split_view<views::all_t<R>, views::all_t<P>>;13//14// template <input_range R>15// split_view(R&&, range_value_t<R>) -> split_view<views::all_t<R>, single_view<range_value_t<R>>>;16 17#include <concepts>18#include <ranges>19#include <type_traits>20#include <utility>21 22struct Container {23 int* begin() const;24 int* end() const;25};26 27struct View : std::ranges::view_base {28 int* begin() const;29 int* end() const;30};31 32template <class I1, class I2, class ExpectedView, class ExpectedPattern>33constexpr void test() {34 static_assert(std::is_same_v<decltype(std::ranges::split_view(std::declval<I1>(), std::declval<I2>())),35 std::ranges::split_view<ExpectedView, ExpectedPattern>>);36}37 38constexpr void testCtad() {39 // (Range, Pattern)40 test<View, View, View, View>();41 test<Container&, Container&, std::ranges::ref_view<Container>, std::ranges::ref_view<Container>>();42 test<Container&&, Container&&, std::ranges::owning_view<Container>, std::ranges::owning_view<Container>>();43 44 // (Range, RangeElement)45 test<Container&, int, std::ranges::ref_view<Container>, std::ranges::single_view<int>>();46 test<View, int, View, std::ranges::single_view<int>>();47 48 // (Range, RangeElement) with implicit conversion.49 test<Container&, bool, std::ranges::ref_view<Container>, std::ranges::single_view<int>>();50 test<View, bool, View, std::ranges::single_view<int>>();51}52