================ @@ -0,0 +1,190 @@ +//===----------------------------------------------------------------------===// +// +// 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 +// +//===----------------------------------------------------------------------===// + +// <algorithm> + +// UNSUPPORTED: c++03, c++11, c++14, c++17, c++20 +// template<input_iterator I, sentinel_for<I> S, class T, class Proj = identity> +// requires indirect_binary_predicate<ranges::equal_to, projected<I, Proj>, const T*> +// constexpr bool ranges::contains(I first, S last, const T& value, Proj proj = {}); // since C++23 + +// template<input_range R, class T, class Proj = identity> +// requires indirect_binary_predicate<ranges::equal_to, projected<iterator_t<R>, Proj>, const T*> +// constexpr bool ranges::contains(R&& r, const T& value, Proj proj = {}); // since C++23 + +#include <algorithm> +#include <array> +#include <cassert> +#include <ranges> +#include <vector> + +#include "almost_satisfies_types.h" +#include "boolean_testable.h" +#include "test_iterators.h" + +struct NotEqualityComparable {}; + +template <class Iter, class Sent = Iter> +concept HasContainsIt = requires(Iter iter, Sent sent) { std::ranges::contains(iter, sent, *iter); }; + +static_assert(HasContainsIt<int*>); +static_assert(!HasContainsIt<NotEqualityComparable*>); +static_assert(!HasContainsIt<InputIteratorNotDerivedFrom>); +static_assert(!HasContainsIt<InputIteratorNotIndirectlyReadable>); +static_assert(!HasContainsIt<InputIteratorNotInputOrOutputIterator>); +static_assert(!HasContainsIt<cpp20_input_iterator<int*>, SentinelForNotSemiregular>); +static_assert(!HasContainsIt<cpp20_input_iterator<int*>, InputRangeNotSentinelEqualityComparableWith>); + +static_assert(!HasContainsIt<int*, int>); +static_assert(!HasContainsIt<int, int*>); + +template <class Range, class ValT> +concept HasContainsR = requires(Range range) { std::ranges::contains(range, ValT{}); }; + +static_assert(HasContainsR<std::array<int, 1>, int>); +static_assert(!HasContainsR<int, int>); +static_assert(!HasContainsR<std::array<NotEqualityComparable, 1>, NotEqualityComparable>); +static_assert(!HasContainsR<InputRangeNotDerivedFrom, int>); +static_assert(!HasContainsR<InputRangeNotIndirectlyReadable, int>); +static_assert(!HasContainsR<InputRangeNotInputOrOutputIterator, int>); +static_assert(!HasContainsR<InputRangeNotSentinelSemiregular, int>); +static_assert(!HasContainsR<InputRangeNotSentinelEqualityComparableWith, int>); + +static std::vector<int> comparable_data; + +// clang-format off +template <class Iter, class Sent = Iter> +constexpr void test_iterators() { + using ValueT = std::iter_value_t<Iter>; + { // simple tests + { + ValueT a[] = {1, 2, 3, 4, 5, 6}; + std::same_as<bool> auto ret = + std::ranges::contains(Iter(a), Sent(Iter(a + 6)), 3); + assert(ret); + } + { + ValueT a[] = {1, 2, 3, 4, 5, 6}; + auto range = std::ranges::subrange(Iter(a), Sent(Iter(a + 6))); + std::same_as<bool> decltype(auto) ret = + std::ranges::contains(range, 3); + assert(ret); + } + } + + { // check that an empty range works + { + ValueT a[] = {}; + auto ret = std::ranges::contains(Iter(a), Sent(Iter(a)), 1); + assert(!ret); + } + { + ValueT a[] = {}; + auto range = std::ranges::subrange(Iter(a), Sent(Iter(a))); + auto ret = std::ranges::contains(range, 1); + assert(!ret); + } + } + + { // check that no match ---------------- var-const wrote:
We can also check: - one-element range; - the match is the very first element; - the match is the last element. https://github.com/llvm/llvm-project/pull/65148 _______________________________________________ cfe-commits mailing list cfe-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
