49 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<forward_range V, forward_range Pattern>12// requires view<V> && view<Pattern> &&13// indirectly_comparable<iterator_t<V>, iterator_t<Pattern>, ranges::equal_to>14// class split_view;15 16#include <ranges>17 18#include "test_macros.h"19#include "test_iterators.h"20 21template <class It>22using Range = std::ranges::subrange<It, sentinel_wrapper<It>>;23 24template <class View, class Pattern>25concept HasSplitView = requires { typename std::ranges::split_view<View, Pattern>; };26 27static_assert(HasSplitView<Range<int*>, Range<int*>>);28 29// !forward_range<V>30static_assert(!HasSplitView<Range<cpp20_input_iterator<int*>>, Range<int*>>);31 32// !forward_range<Pattern>33static_assert(!HasSplitView<Range<int*>, Range<cpp20_input_iterator<int*>>>);34 35struct NotAView {36 int* begin() const;37 int* end() const;38};39 40// !view<V>41static_assert(!HasSplitView<NotAView, Range<int*>>);42 43// !view<Pattern>44static_assert(!HasSplitView<Range<int*>, NotAView>);45 46// indirectly_comparable<iterator_t<V>, iterator_t<Pattern>, ranges::equal_to47struct Foo {};48static_assert(!HasSplitView<Range<int*>, Range<Foo*>>);49