[libc-commits] [libc] [libc++] Implement ranges::contains (PR #65148)
via libc-commits
libc-commits at lists.llvm.org
Fri Oct 13 07:32:36 PDT 2023
https://github.com/ZijunZhaoCCK updated https://github.com/llvm/llvm-project/pull/65148
>From 02e9afd761228f401df4d9f8dfaaca44ffae0c6e Mon Sep 17 00:00:00 2001
From: zijunzhao <zijunzhao at google.com>
Date: Thu, 31 Aug 2023 20:08:32 +0000
Subject: [PATCH 01/15] [libc++] Implement ranges::contains
Differential Revision: https://reviews.llvm.org/D159232
---
libcxx/include/CMakeLists.txt | 1 +
libcxx/include/__algorithm/ranges_contains.h | 60 ++++++
libcxx/include/algorithm | 9 +
...obust_against_copying_projections.pass.cpp | 4 +
.../alg.contains/ranges.contains.pass.cpp | 190 ++++++++++++++++++
.../niebloid.compile.pass.cpp | 1 +
6 files changed, 265 insertions(+)
create mode 100644 libcxx/include/__algorithm/ranges_contains.h
create mode 100644 libcxx/test/std/algorithms/alg.nonmodifying/alg.contains/ranges.contains.pass.cpp
diff --git a/libcxx/include/CMakeLists.txt b/libcxx/include/CMakeLists.txt
index 77a7269121ec142..024aa8959fb7200 100644
--- a/libcxx/include/CMakeLists.txt
+++ b/libcxx/include/CMakeLists.txt
@@ -104,6 +104,7 @@ set(files
__algorithm/ranges_any_of.h
__algorithm/ranges_binary_search.h
__algorithm/ranges_clamp.h
+ __algorithm/ranges_contains.h
__algorithm/ranges_copy.h
__algorithm/ranges_copy_backward.h
__algorithm/ranges_copy_if.h
diff --git a/libcxx/include/__algorithm/ranges_contains.h b/libcxx/include/__algorithm/ranges_contains.h
new file mode 100644
index 000000000000000..647b7ea34be3421
--- /dev/null
+++ b/libcxx/include/__algorithm/ranges_contains.h
@@ -0,0 +1,60 @@
+//===----------------------------------------------------------------------===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef _LIBCPP___ALGORITHM_RANGES_CONTAINS_H
+#define _LIBCPP___ALGORITHM_RANGES_CONTAINS_H
+
+#include <__algorithm/in_in_result.h>
+#include <__algorithm/ranges_find.h>
+#include <__config>
+#include <__functional/identity.h>
+#include <__functional/ranges_operations.h>
+#include <__functional/reference_wrapper.h>
+#include <__iterator/concepts.h>
+#include <__iterator/indirectly_comparable.h>
+#include <__iterator/projected.h>
+#include <__ranges/access.h>
+#include <__ranges/concepts.h>
+#include <__utility/move.h>
+
+#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
+# pragma GCC system_header
+#endif
+
+#if _LIBCPP_STD_VER >= 23
+
+_LIBCPP_BEGIN_NAMESPACE_STD
+
+namespace ranges {
+namespace __contains {
+struct __fn {
+ template <input_iterator _Iter, sentinel_for<_Iter> _Sent, class _Type, class _Proj = identity>
+ requires indirect_binary_predicate<ranges::equal_to, projected<_Iter, _Proj>, const _Type*>
+ _LIBCPP_NODISCARD_EXT _LIBCPP_HIDE_FROM_ABI constexpr bool
+ operator()(_Iter __first, _Sent __last, const _Type& __value, _Proj __proj = {}) const {
+ return ranges::find(std::move(__first), std::move(__last), __value, std::ref(__proj)) != __last;
+ }
+
+ template <input_range _Range, class _Type, class _Proj = identity>
+ requires indirect_binary_predicate<ranges::equal_to, projected<iterator_t<_Range>, _Proj>, const _Type*>
+ _LIBCPP_NODISCARD_EXT _LIBCPP_HIDE_FROM_ABI constexpr bool
+ operator()(_Range&& __range, const _Type& __value, _Proj __proj = {}) const {
+ return ranges::find(ranges::begin(__range), ranges::end(__range), __value, std::ref(__proj)) != ranges::end(__range);
+ }
+};
+} // namespace __contains
+inline namespace __cpo {
+inline constexpr auto contains = __contains::__fn{};
+} // namespace __cpo
+} // namespace ranges
+
+_LIBCPP_END_NAMESPACE_STD
+
+#endif // _LIBCPP_STD_VER >= 23
+
+#endif // _LIBCPP___ALGORITHM_RANGES_CONTAINS_H
diff --git a/libcxx/include/algorithm b/libcxx/include/algorithm
index 76e0d22bf73ef85..003bf132b38b4d8 100644
--- a/libcxx/include/algorithm
+++ b/libcxx/include/algorithm
@@ -226,6 +226,14 @@ namespace ranges {
template<class I1, class I2>
using copy_backward_result = in_out_result<I1, I2>; // since 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
+
template<input_iterator I, sentinel_for<I> S, weakly_incrementable O>
requires indirectly_copyable<I, O>
constexpr ranges::copy_result<I, O> ranges::copy(I first, S last, O result); // since C++20
@@ -1827,6 +1835,7 @@ template <class BidirectionalIterator, class Compare>
#include <__algorithm/ranges_any_of.h>
#include <__algorithm/ranges_binary_search.h>
#include <__algorithm/ranges_clamp.h>
+#include <__algorithm/ranges_contains.h>
#include <__algorithm/ranges_copy.h>
#include <__algorithm/ranges_copy_backward.h>
#include <__algorithm/ranges_copy_if.h>
diff --git a/libcxx/test/libcxx/algorithms/ranges_robust_against_copying_projections.pass.cpp b/libcxx/test/libcxx/algorithms/ranges_robust_against_copying_projections.pass.cpp
index 111b0ff655f5342..e50f4ef2ed719c7 100644
--- a/libcxx/test/libcxx/algorithms/ranges_robust_against_copying_projections.pass.cpp
+++ b/libcxx/test/libcxx/algorithms/ranges_robust_against_copying_projections.pass.cpp
@@ -80,6 +80,10 @@ constexpr bool all_the_algorithms()
(void)std::ranges::binary_search(first, last, value, Less(), Proj(&copies)); assert(copies == 0);
(void)std::ranges::binary_search(a, value, Less(), Proj(&copies)); assert(copies == 0);
(void)std::ranges::clamp(T(), T(), T(), Less(), Proj(&copies)); assert(copies == 0);
+#if TEST_STD_VER >= 23
+ (void)std::ranges::contains(first, last, value, Proj(&copies)); assert(copies == 0);
+ (void)std::ranges::contains(a, value, Proj(&copies)); assert(copies == 0);
+#endif
(void)std::ranges::count(first, last, value, Proj(&copies)); assert(copies == 0);
(void)std::ranges::count(a, value, Proj(&copies)); assert(copies == 0);
(void)std::ranges::count_if(first, last, UnaryTrue(), Proj(&copies)); assert(copies == 0);
diff --git a/libcxx/test/std/algorithms/alg.nonmodifying/alg.contains/ranges.contains.pass.cpp b/libcxx/test/std/algorithms/alg.nonmodifying/alg.contains/ranges.contains.pass.cpp
new file mode 100644
index 000000000000000..8e67e971c2f040b
--- /dev/null
+++ b/libcxx/test/std/algorithms/alg.nonmodifying/alg.contains/ranges.contains.pass.cpp
@@ -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
+ {
+ ValueT a[] = {13, 1, 21, 4, 5};
+ auto ret = std::ranges::contains(Iter(a), Sent(Iter(a + 5)), 10);
+ assert(!ret);
+ }
+ {
+ ValueT a[] = {13, 1, 21, 4, 5};
+ auto range = std::ranges::subrange(Iter(a), Sent(Iter(a + 5)));
+ auto ret = std::ranges::contains(range, 10);
+ assert(!ret);
+ }
+ }
+
+ if (!std::is_constant_evaluated())
+ comparable_data.clear();
+}
+template <class ElementT>
+class TriviallyComparable {
+ ElementT el_;
+
+public:
+ TEST_CONSTEXPR TriviallyComparable(ElementT el) : el_(el) {}
+ bool operator==(const TriviallyComparable&) const = default;
+};
+
+template <class IndexT>
+class Comparable {
+ IndexT index_;
+
+public:
+ Comparable(IndexT i)
+ : index_([&]() {
+ IndexT size = static_cast<IndexT>(comparable_data.size());
+ comparable_data.push_back(i);
+ return size;
+ }()) {}
+
+ bool operator==(const Comparable& other) const {
+ return comparable_data[other.index_] == comparable_data[index_];
+ }
+
+ friend bool operator==(const Comparable& lhs, long long rhs) { return comparable_data[lhs.index_] == rhs; }
+};
+
+constexpr bool test() {
+ types::for_each(types::type_list<char, wchar_t, int, long,
+ TriviallyComparable<char>, TriviallyComparable<wchar_t>>{},
+ []<class T> {
+ types::for_each(types::cpp20_input_iterator_list<T*>{},
+ []<class Iter> {
+ if constexpr (std::forward_iterator<Iter>)
+ test_iterators<Iter>();
+ test_iterators<Iter, sentinel_wrapper<Iter>>();
+ test_iterators<Iter, sized_sentinel<Iter>>();
+ });
+ });
+
+ {
+ // count invocations of the projection
+ {
+ int a[] = {1, 9, 0, 13, 25};
+ int projection_count = 0;
+ auto ret = std::ranges::contains(a, a + 5, 0,
+ [&](int i) { ++projection_count; return i; });
+ assert(ret);
+ assert(projection_count == 3);
+ }
+ {
+ int a[] ={1, 9, 0, 13, 25};
+ int projection_count = 0;
+ auto range = std::ranges::subrange(a, a + 5);
+ auto ret = std::ranges::contains(range, 0, [&](int i) { ++projection_count; return i; });
+ assert(ret);
+ assert(projection_count == 3);
+ }
+ }
+ return true;
+}
+
+int main(int, char**) {
+ test();
+ static_assert(test());
+
+ types::for_each(types::type_list<Comparable<char>, Comparable<wchar_t>>{},
+ []<class T> {
+ types::for_each(types::cpp20_input_iterator_list<T*>{},
+ []<class Iter> {
+ if constexpr (std::forward_iterator<Iter>)
+ test_iterators<Iter>();
+ test_iterators<Iter, sentinel_wrapper<Iter>>();
+ test_iterators<Iter, sized_sentinel<Iter>>();
+ });
+ });
+
+ return 0;
+}
diff --git a/libcxx/test/std/library/description/conventions/customization.point.object/niebloid.compile.pass.cpp b/libcxx/test/std/library/description/conventions/customization.point.object/niebloid.compile.pass.cpp
index 9e00a57ba80c631..8884941fee32345 100644
--- a/libcxx/test/std/library/description/conventions/customization.point.object/niebloid.compile.pass.cpp
+++ b/libcxx/test/std/library/description/conventions/customization.point.object/niebloid.compile.pass.cpp
@@ -65,6 +65,7 @@ static_assert(test(std::ranges::all_of, a, odd));
static_assert(test(std::ranges::any_of, a, odd));
static_assert(test(std::ranges::binary_search, a, 42));
static_assert(test(std::ranges::clamp, 42, 42, 42));
+static_assert(test(std::ranges::contains, a, 42));
static_assert(test(std::ranges::copy, a, a));
static_assert(test(std::ranges::copy_backward, a, a));
static_assert(test(std::ranges::copy_if, a, a, odd));
>From 80c08f6f2f86ae650ef0cbbc5d4a5f5ce39e0916 Mon Sep 17 00:00:00 2001
From: zijunzhao <zijunzhao at google.com>
Date: Thu, 31 Aug 2023 20:08:32 +0000
Subject: [PATCH 02/15] [libc++] Implement ranges::contains
Differential Revision: https://reviews.llvm.org/D159232
---
libcxx/include/__algorithm/ranges_contains.h | 1 +
.../alg.nonmodifying/alg.contains/ranges.contains.pass.cpp | 4 +++-
2 files changed, 4 insertions(+), 1 deletion(-)
diff --git a/libcxx/include/__algorithm/ranges_contains.h b/libcxx/include/__algorithm/ranges_contains.h
index 647b7ea34be3421..018d362900e3949 100644
--- a/libcxx/include/__algorithm/ranges_contains.h
+++ b/libcxx/include/__algorithm/ranges_contains.h
@@ -48,6 +48,7 @@ struct __fn {
}
};
} // namespace __contains
+
inline namespace __cpo {
inline constexpr auto contains = __contains::__fn{};
} // namespace __cpo
diff --git a/libcxx/test/std/algorithms/alg.nonmodifying/alg.contains/ranges.contains.pass.cpp b/libcxx/test/std/algorithms/alg.nonmodifying/alg.contains/ranges.contains.pass.cpp
index 8e67e971c2f040b..a0c4acb08f5c92a 100644
--- a/libcxx/test/std/algorithms/alg.nonmodifying/alg.contains/ranges.contains.pass.cpp
+++ b/libcxx/test/std/algorithms/alg.nonmodifying/alg.contains/ranges.contains.pass.cpp
@@ -9,6 +9,7 @@
// <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
@@ -108,6 +109,7 @@ constexpr void test_iterators() {
if (!std::is_constant_evaluated())
comparable_data.clear();
}
+
template <class ElementT>
class TriviallyComparable {
ElementT el_;
@@ -160,7 +162,7 @@ constexpr bool test() {
assert(projection_count == 3);
}
{
- int a[] ={1, 9, 0, 13, 25};
+ int a[] = {1, 9, 0, 13, 25};
int projection_count = 0;
auto range = std::ranges::subrange(a, a + 5);
auto ret = std::ranges::contains(range, 0, [&](int i) { ++projection_count; return i; });
>From 34d8e29a0c9c6bd11d8d0ba1433015d8d22f0c4a Mon Sep 17 00:00:00 2001
From: zijunzhao <zijunzhao at google.com>
Date: Thu, 31 Aug 2023 20:08:32 +0000
Subject: [PATCH 03/15] [libc++] Implement ranges::contains
Differential Revision: https://reviews.llvm.org/D159232
---
.../alg.contains/ranges.contains.pass.cpp | 92 +++++++++++++------
1 file changed, 65 insertions(+), 27 deletions(-)
diff --git a/libcxx/test/std/algorithms/alg.nonmodifying/alg.contains/ranges.contains.pass.cpp b/libcxx/test/std/algorithms/alg.nonmodifying/alg.contains/ranges.contains.pass.cpp
index a0c4acb08f5c92a..b4c879bbc8ee26c 100644
--- a/libcxx/test/std/algorithms/alg.nonmodifying/alg.contains/ranges.contains.pass.cpp
+++ b/libcxx/test/std/algorithms/alg.nonmodifying/alg.contains/ranges.contains.pass.cpp
@@ -40,15 +40,17 @@ 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<cpp20_input_iterator<int*>, sentinel_wrapper<cpp20_input_iterator<int*>>>);
static_assert(!HasContainsIt<int*, int>);
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{}); };
+concept HasContainsR = requires(Range&& range) { std::ranges::contains(std::forward<Range>(range), ValT{}); };
-static_assert(HasContainsR<std::array<int, 1>, int>);
static_assert(!HasContainsR<int, int>);
+static_assert(HasContainsR<std::array<int, 1>, int>);
static_assert(!HasContainsR<std::array<NotEqualityComparable, 1>, NotEqualityComparable>);
static_assert(!HasContainsR<InputRangeNotDerivedFrom, int>);
static_assert(!HasContainsR<InputRangeNotIndirectlyReadable, int>);
@@ -63,45 +65,81 @@ 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};
+ auto whole = std::ranges::subrange(Iter(a), Sent(Iter(a + 6)));
{
- ValueT a[] = {1, 2, 3, 4, 5, 6};
- std::same_as<bool> auto ret =
- std::ranges::contains(Iter(a), Sent(Iter(a + 6)), 3);
+ [[maybe_unused]] std::same_as<bool> decltype(auto) ret =
+ std::ranges::contains(whole.begin(), whole.end(), 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);
+ [[maybe_unused]] std::same_as<bool> decltype(auto) ret =
+ std::ranges::contains(whole, 3);
+ assert(ret);
+ }
+ }
+
+ { // check that a range with a single element works
+ ValueT a[] = {32};
+ auto whole = std::ranges::subrange(Iter(a), Sent(Iter(a + 1)));
+ {
+ bool ret = std::ranges::contains(whole.begin(), whole.end(), 32);
+ assert(ret);
+ }
+ {
+ bool ret = std::ranges::contains(whole, 32);
assert(ret);
}
}
{ // check that an empty range works
+ ValueT a[] = {};
+ auto whole = std::ranges::subrange(Iter(a), Sent(Iter(a)));
{
- ValueT a[] = {};
- auto ret = std::ranges::contains(Iter(a), Sent(Iter(a)), 1);
+ bool ret = std::ranges::contains(whole.begin(), whole.end(), 1);
assert(!ret);
}
{
- ValueT a[] = {};
- auto range = std::ranges::subrange(Iter(a), Sent(Iter(a)));
- auto ret = std::ranges::contains(range, 1);
+ bool ret = std::ranges::contains(whole, 1);
assert(!ret);
}
}
- { // check that no match
+ { // check that the first element matches
+ ValueT a[] = {32, 3, 2, 1, 0, 23, 21, 9, 40, 100};
+ auto whole = std::ranges::subrange(Iter(a), Sent(Iter(a + 10)));
+ {
+ bool ret = std::ranges::contains(whole.begin(), whole.end(), 32);
+ assert(ret);
+ }
+ {
+ bool ret = std::ranges::contains(whole, 32);
+ assert(ret);
+ }
+ }
+
+ { // check that the last element matches
+ ValueT a[] = {3, 22, 1, 43, 99, 0, 56, 100, 32};
+ auto whole = std::ranges::subrange(Iter(a), Sent(Iter(a + 9)));
+ {
+ bool ret = std::ranges::contains(whole.begin(), whole.end(), 32);
+ assert(ret);
+ }
+ {
+ bool ret = std::ranges::contains(whole, 32);
+ assert(ret);
+ }
+ }
+
+ { // no match
+ ValueT a[] = {13, 1, 21, 4, 5};
+ auto whole = std::ranges::subrange(Iter(a), Sent(Iter(a + 5)));
{
- ValueT a[] = {13, 1, 21, 4, 5};
- auto ret = std::ranges::contains(Iter(a), Sent(Iter(a + 5)), 10);
+ bool ret = std::ranges::contains(whole.begin(), whole.end(), 10);
assert(!ret);
}
{
- ValueT a[] = {13, 1, 21, 4, 5};
- auto range = std::ranges::subrange(Iter(a), Sent(Iter(a + 5)));
- auto ret = std::ranges::contains(range, 10);
+ bool ret = std::ranges::contains(whole, 10);
assert(!ret);
}
}
@@ -115,7 +153,7 @@ class TriviallyComparable {
ElementT el_;
public:
- TEST_CONSTEXPR TriviallyComparable(ElementT el) : el_(el) {}
+ constexpr TriviallyComparable(ElementT el) : el_(el) {}
bool operator==(const TriviallyComparable&) const = default;
};
@@ -152,20 +190,20 @@ constexpr bool test() {
});
{
+ int a[] = {1, 9, 0, 13, 25};
+ int projection_count = 0;
// count invocations of the projection
{
- int a[] = {1, 9, 0, 13, 25};
- int projection_count = 0;
- auto ret = std::ranges::contains(a, a + 5, 0,
+ projection_count = 0;
+ bool ret = std::ranges::contains(a, a + 5, 0,
[&](int i) { ++projection_count; return i; });
assert(ret);
assert(projection_count == 3);
}
{
- int a[] = {1, 9, 0, 13, 25};
- int projection_count = 0;
+ projection_count = 0;
auto range = std::ranges::subrange(a, a + 5);
- auto ret = std::ranges::contains(range, 0, [&](int i) { ++projection_count; return i; });
+ bool ret = std::ranges::contains(range, 0, [&](int i) { ++projection_count; return i; });
assert(ret);
assert(projection_count == 3);
}
>From 9db49ddab25affcd7c05d0c825ec2788dd53e5b5 Mon Sep 17 00:00:00 2001
From: zijunzhao <zijunzhao at google.com>
Date: Thu, 31 Aug 2023 20:08:32 +0000
Subject: [PATCH 04/15] [libc++] Implement ranges::contains
Differential Revision: https://reviews.llvm.org/D159232
---
.../alg.nonmodifying/alg.contains/ranges.contains.pass.cpp | 1 -
1 file changed, 1 deletion(-)
diff --git a/libcxx/test/std/algorithms/alg.nonmodifying/alg.contains/ranges.contains.pass.cpp b/libcxx/test/std/algorithms/alg.nonmodifying/alg.contains/ranges.contains.pass.cpp
index b4c879bbc8ee26c..29a686a1ae8eede 100644
--- a/libcxx/test/std/algorithms/alg.nonmodifying/alg.contains/ranges.contains.pass.cpp
+++ b/libcxx/test/std/algorithms/alg.nonmodifying/alg.contains/ranges.contains.pass.cpp
@@ -194,7 +194,6 @@ constexpr bool test() {
int projection_count = 0;
// count invocations of the projection
{
- projection_count = 0;
bool ret = std::ranges::contains(a, a + 5, 0,
[&](int i) { ++projection_count; return i; });
assert(ret);
>From 54bccdd7677000ae6d90bc0fc9790d9c2c69602b Mon Sep 17 00:00:00 2001
From: zijunzhao <zijunzhao at google.com>
Date: Thu, 31 Aug 2023 20:08:32 +0000
Subject: [PATCH 05/15] [libc++] Implement ranges::contains
Differential Revision: https://reviews.llvm.org/D159232
---
.../alg.contains/ranges.contains.pass.cpp | 23 +++++++++++++++++++
1 file changed, 23 insertions(+)
diff --git a/libcxx/test/std/algorithms/alg.nonmodifying/alg.contains/ranges.contains.pass.cpp b/libcxx/test/std/algorithms/alg.nonmodifying/alg.contains/ranges.contains.pass.cpp
index 29a686a1ae8eede..eb6567c786342a7 100644
--- a/libcxx/test/std/algorithms/alg.nonmodifying/alg.contains/ranges.contains.pass.cpp
+++ b/libcxx/test/std/algorithms/alg.nonmodifying/alg.contains/ranges.contains.pass.cpp
@@ -144,6 +144,29 @@ constexpr void test_iterators() {
}
}
+ { // check that the projections are used
+ int a[] = {1, 9, 0, 13, 25};
+ {
+ bool ret = std::ranges::contains(a, a + 5, -13, [&](int i) { return i * -1; });
+ assert(ret);
+ }
+ {
+ auto range = std::ranges::subrange(a, a + 5);
+ bool ret = std::ranges::contains(range, -13, [&](int i) { return i * -1; });
+ assert(ret);
+ }
+ }
+
+ { // check the nodiscard extension
+ // use #pragma around to suppress error: ignoring return value of function
+ // declared with 'nodiscard' attribute [-Werror,-Wunused-result]
+ #pragma clang diagnostic push
+ #pragma clang diagnostic ignored "-Wunused-result"
+ int a[] = {1, 9, 0, 13, 25};
+ std::ranges::contains(a, a + 5, -13, [&](int i) { return i * -1; });
+ #pragma clang diagnostic pop
+ }
+
if (!std::is_constant_evaluated())
comparable_data.clear();
}
>From 826bd982d734c23fbe95d79cb446b5bb50341f34 Mon Sep 17 00:00:00 2001
From: zijunzhao <zijunzhao at google.com>
Date: Thu, 31 Aug 2023 20:08:32 +0000
Subject: [PATCH 06/15] [libc++] Implement ranges::contains
Differential Revision: https://reviews.llvm.org/D159232
---
.../alg.nonmodifying/alg.contains/ranges.contains.pass.cpp | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/libcxx/test/std/algorithms/alg.nonmodifying/alg.contains/ranges.contains.pass.cpp b/libcxx/test/std/algorithms/alg.nonmodifying/alg.contains/ranges.contains.pass.cpp
index eb6567c786342a7..9e079b7dc427239 100644
--- a/libcxx/test/std/algorithms/alg.nonmodifying/alg.contains/ranges.contains.pass.cpp
+++ b/libcxx/test/std/algorithms/alg.nonmodifying/alg.contains/ranges.contains.pass.cpp
@@ -162,8 +162,9 @@ constexpr void test_iterators() {
// declared with 'nodiscard' attribute [-Werror,-Wunused-result]
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wunused-result"
- int a[] = {1, 9, 0, 13, 25};
- std::ranges::contains(a, a + 5, -13, [&](int i) { return i * -1; });
+ ValueT a[] = {1, 9, 0, 13, 25};
+ auto whole = std::ranges::subrange(Iter(a), Sent(Iter(a + 5)));
+ std::ranges::contains(whole.begin(), whole.end(), 12);
#pragma clang diagnostic pop
}
>From 32cf818aa8a74e7d2c8e30892e463a09a5dca4d6 Mon Sep 17 00:00:00 2001
From: zijunzhao <zijunzhao at google.com>
Date: Thu, 31 Aug 2023 20:08:32 +0000
Subject: [PATCH 07/15] [libc++] Implement ranges::contains
Differential Revision: https://reviews.llvm.org/D159232
---
.../alg.nonmodifying/alg.contains/ranges.contains.pass.cpp | 1 -
1 file changed, 1 deletion(-)
diff --git a/libcxx/test/std/algorithms/alg.nonmodifying/alg.contains/ranges.contains.pass.cpp b/libcxx/test/std/algorithms/alg.nonmodifying/alg.contains/ranges.contains.pass.cpp
index 9e079b7dc427239..f91641b4a6de498 100644
--- a/libcxx/test/std/algorithms/alg.nonmodifying/alg.contains/ranges.contains.pass.cpp
+++ b/libcxx/test/std/algorithms/alg.nonmodifying/alg.contains/ranges.contains.pass.cpp
@@ -60,7 +60,6 @@ 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>;
>From 4420189228af33f2fc23af1c4e2c70740f640bca Mon Sep 17 00:00:00 2001
From: Zijun Zhao <zijunzhao at google.com>
Date: Mon, 11 Sep 2023 17:35:39 -0700
Subject: [PATCH 08/15] update the tests and make it more elegant
---
.../alg.nonmodifying/alg.contains/ranges.contains.pass.cpp | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/libcxx/test/std/algorithms/alg.nonmodifying/alg.contains/ranges.contains.pass.cpp b/libcxx/test/std/algorithms/alg.nonmodifying/alg.contains/ranges.contains.pass.cpp
index f91641b4a6de498..e9465c58f87890e 100644
--- a/libcxx/test/std/algorithms/alg.nonmodifying/alg.contains/ranges.contains.pass.cpp
+++ b/libcxx/test/std/algorithms/alg.nonmodifying/alg.contains/ranges.contains.pass.cpp
@@ -50,8 +50,8 @@ template <class Range, class ValT>
concept HasContainsR = requires(Range&& range) { std::ranges::contains(std::forward<Range>(range), ValT{}); };
static_assert(!HasContainsR<int, int>);
-static_assert(HasContainsR<std::array<int, 1>, int>);
-static_assert(!HasContainsR<std::array<NotEqualityComparable, 1>, NotEqualityComparable>);
+static_assert(HasContainsR<int[1], int>);
+static_assert(!HasContainsR<NotEqualityComparable[1], NotEqualityComparable>);
static_assert(!HasContainsR<InputRangeNotDerivedFrom, int>);
static_assert(!HasContainsR<InputRangeNotIndirectlyReadable, int>);
static_assert(!HasContainsR<InputRangeNotInputOrOutputIterator, int>);
>From 7481a66f70ab6c969142d17cff54dbd69ab4a7a2 Mon Sep 17 00:00:00 2001
From: Zijun Zhao <zijunzhao at google.com>
Date: Tue, 12 Sep 2023 14:32:38 -0700
Subject: [PATCH 10/15] update test types
---
.../alg.nonmodifying/alg.contains/ranges.contains.pass.cpp | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/libcxx/test/std/algorithms/alg.nonmodifying/alg.contains/ranges.contains.pass.cpp b/libcxx/test/std/algorithms/alg.nonmodifying/alg.contains/ranges.contains.pass.cpp
index e9465c58f87890e..30bb399bd6dec9d 100644
--- a/libcxx/test/std/algorithms/alg.nonmodifying/alg.contains/ranges.contains.pass.cpp
+++ b/libcxx/test/std/algorithms/alg.nonmodifying/alg.contains/ranges.contains.pass.cpp
@@ -200,7 +200,7 @@ class Comparable {
};
constexpr bool test() {
- types::for_each(types::type_list<char, wchar_t, int, long,
+ types::for_each(types::type_list<char, short, int, long, long long,
TriviallyComparable<char>, TriviallyComparable<wchar_t>>{},
[]<class T> {
types::for_each(types::cpp20_input_iterator_list<T*>{},
>From f37aa1df5fcbf084da184640bc247e7ffbbd5ee9 Mon Sep 17 00:00:00 2001
From: Zijun Zhao <zijunzhao at google.com>
Date: Wed, 13 Sep 2023 14:45:11 -0700
Subject: [PATCH 11/15] simplify code
---
.../alg.nonmodifying/alg.contains/ranges.contains.pass.cpp | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/libcxx/test/std/algorithms/alg.nonmodifying/alg.contains/ranges.contains.pass.cpp b/libcxx/test/std/algorithms/alg.nonmodifying/alg.contains/ranges.contains.pass.cpp
index 30bb399bd6dec9d..77e90a528e37dd8 100644
--- a/libcxx/test/std/algorithms/alg.nonmodifying/alg.contains/ranges.contains.pass.cpp
+++ b/libcxx/test/std/algorithms/alg.nonmodifying/alg.contains/ranges.contains.pass.cpp
@@ -163,7 +163,7 @@ constexpr void test_iterators() {
#pragma clang diagnostic ignored "-Wunused-result"
ValueT a[] = {1, 9, 0, 13, 25};
auto whole = std::ranges::subrange(Iter(a), Sent(Iter(a + 5)));
- std::ranges::contains(whole.begin(), whole.end(), 12);
+ std::ranges::contains(whole, 12);
#pragma clang diagnostic pop
}
>From e21911a96cd488a20e1830327b7d198bb5bf8506 Mon Sep 17 00:00:00 2001
From: Zijun Zhao <zijunzhao at google.com>
Date: Tue, 3 Oct 2023 17:12:02 -0700
Subject: [PATCH 12/15] nits fixed
---
libcxx/include/__algorithm/ranges_contains.h | 4 ++--
.../alg.contains/ranges.contains.pass.cpp | 8 ++++----
2 files changed, 6 insertions(+), 6 deletions(-)
diff --git a/libcxx/include/__algorithm/ranges_contains.h b/libcxx/include/__algorithm/ranges_contains.h
index 018d362900e3949..08d5305477889be 100644
--- a/libcxx/include/__algorithm/ranges_contains.h
+++ b/libcxx/include/__algorithm/ranges_contains.h
@@ -9,7 +9,6 @@
#ifndef _LIBCPP___ALGORITHM_RANGES_CONTAINS_H
#define _LIBCPP___ALGORITHM_RANGES_CONTAINS_H
-#include <__algorithm/in_in_result.h>
#include <__algorithm/ranges_find.h>
#include <__config>
#include <__functional/identity.h>
@@ -44,7 +43,8 @@ struct __fn {
requires indirect_binary_predicate<ranges::equal_to, projected<iterator_t<_Range>, _Proj>, const _Type*>
_LIBCPP_NODISCARD_EXT _LIBCPP_HIDE_FROM_ABI constexpr bool
operator()(_Range&& __range, const _Type& __value, _Proj __proj = {}) const {
- return ranges::find(ranges::begin(__range), ranges::end(__range), __value, std::ref(__proj)) != ranges::end(__range);
+ return ranges::find(ranges::begin(__range), ranges::end(__range), __value,
+ std::ref(__proj)) != ranges::end(__range);
}
};
} // namespace __contains
diff --git a/libcxx/test/std/algorithms/alg.nonmodifying/alg.contains/ranges.contains.pass.cpp b/libcxx/test/std/algorithms/alg.nonmodifying/alg.contains/ranges.contains.pass.cpp
index 77e90a528e37dd8..66b2732590b5eae 100644
--- a/libcxx/test/std/algorithms/alg.nonmodifying/alg.contains/ranges.contains.pass.cpp
+++ b/libcxx/test/std/algorithms/alg.nonmodifying/alg.contains/ranges.contains.pass.cpp
@@ -203,7 +203,7 @@ constexpr bool test() {
types::for_each(types::type_list<char, short, int, long, long long,
TriviallyComparable<char>, TriviallyComparable<wchar_t>>{},
[]<class T> {
- types::for_each(types::cpp20_input_iterator_list<T*>{},
+ types::for_each(types::cpp20_input_iterator_list<T*>{},
[]<class Iter> {
if constexpr (std::forward_iterator<Iter>)
test_iterators<Iter>();
@@ -212,10 +212,9 @@ constexpr bool test() {
});
});
- {
+ { // count invocations of the projection
int a[] = {1, 9, 0, 13, 25};
int projection_count = 0;
- // count invocations of the projection
{
bool ret = std::ranges::contains(a, a + 5, 0,
[&](int i) { ++projection_count; return i; });
@@ -230,6 +229,7 @@ constexpr bool test() {
assert(projection_count == 3);
}
}
+
return true;
}
@@ -239,7 +239,7 @@ int main(int, char**) {
types::for_each(types::type_list<Comparable<char>, Comparable<wchar_t>>{},
[]<class T> {
- types::for_each(types::cpp20_input_iterator_list<T*>{},
+ types::for_each(types::cpp20_input_iterator_list<T*>{},
[]<class Iter> {
if constexpr (std::forward_iterator<Iter>)
test_iterators<Iter>();
>From fdff1a4c64ca2f403cae67565c4780bc5dbbb424 Mon Sep 17 00:00:00 2001
From: Zijun Zhao <zijunzhao at google.com>
Date: Thu, 12 Oct 2023 18:15:29 -0700
Subject: [PATCH 13/15] 1. remove Comparable and TriviallyComparable 2.
remove wchar_t test 3. some nits
---
.../alg.contains/ranges.contains.pass.cpp | 71 ++-----------------
1 file changed, 6 insertions(+), 65 deletions(-)
diff --git a/libcxx/test/std/algorithms/alg.nonmodifying/alg.contains/ranges.contains.pass.cpp b/libcxx/test/std/algorithms/alg.nonmodifying/alg.contains/ranges.contains.pass.cpp
index 66b2732590b5eae..b98f1c86b75546b 100644
--- a/libcxx/test/std/algorithms/alg.nonmodifying/alg.contains/ranges.contains.pass.cpp
+++ b/libcxx/test/std/algorithms/alg.nonmodifying/alg.contains/ranges.contains.pass.cpp
@@ -19,7 +19,6 @@
// constexpr bool ranges::contains(R&& r, const T& value, Proj proj = {}); // since C++23
#include <algorithm>
-#include <array>
#include <cassert>
#include <ranges>
#include <vector>
@@ -34,6 +33,7 @@ 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<int*, int*>);
static_assert(!HasContainsIt<NotEqualityComparable*>);
static_assert(!HasContainsIt<InputIteratorNotDerivedFrom>);
static_assert(!HasContainsIt<InputIteratorNotIndirectlyReadable>);
@@ -44,7 +44,6 @@ static_assert(!HasContainsIt<cpp20_input_iterator<int*>, sentinel_wrapper<cpp20_
static_assert(!HasContainsIt<int*, int>);
static_assert(!HasContainsIt<int, int*>);
-static_assert(HasContainsIt<int*, int*>);
template <class Range, class ValT>
concept HasContainsR = requires(Range&& range) { std::ranges::contains(std::forward<Range>(range), ValT{}); };
@@ -58,8 +57,6 @@ static_assert(!HasContainsR<InputRangeNotInputOrOutputIterator, int>);
static_assert(!HasContainsR<InputRangeNotSentinelSemiregular, int>);
static_assert(!HasContainsR<InputRangeNotSentinelEqualityComparableWith, int>);
-static std::vector<int> comparable_data;
-
template <class Iter, class Sent = Iter>
constexpr void test_iterators() {
using ValueT = std::iter_value_t<Iter>;
@@ -67,13 +64,12 @@ constexpr void test_iterators() {
ValueT a[] = {1, 2, 3, 4, 5, 6};
auto whole = std::ranges::subrange(Iter(a), Sent(Iter(a + 6)));
{
- [[maybe_unused]] std::same_as<bool> decltype(auto) ret =
+ std::same_as<bool> decltype(auto) ret =
std::ranges::contains(whole.begin(), whole.end(), 3);
assert(ret);
}
{
- [[maybe_unused]] std::same_as<bool> decltype(auto) ret =
- std::ranges::contains(whole, 3);
+ std::same_as<bool> decltype(auto) ret = std::ranges::contains(whole, 3);
assert(ret);
}
}
@@ -155,53 +151,10 @@ constexpr void test_iterators() {
assert(ret);
}
}
-
- { // check the nodiscard extension
- // use #pragma around to suppress error: ignoring return value of function
- // declared with 'nodiscard' attribute [-Werror,-Wunused-result]
- #pragma clang diagnostic push
- #pragma clang diagnostic ignored "-Wunused-result"
- ValueT a[] = {1, 9, 0, 13, 25};
- auto whole = std::ranges::subrange(Iter(a), Sent(Iter(a + 5)));
- std::ranges::contains(whole, 12);
- #pragma clang diagnostic pop
- }
-
- if (!std::is_constant_evaluated())
- comparable_data.clear();
}
-template <class ElementT>
-class TriviallyComparable {
- ElementT el_;
-
-public:
- constexpr TriviallyComparable(ElementT el) : el_(el) {}
- bool operator==(const TriviallyComparable&) const = default;
-};
-
-template <class IndexT>
-class Comparable {
- IndexT index_;
-
-public:
- Comparable(IndexT i)
- : index_([&]() {
- IndexT size = static_cast<IndexT>(comparable_data.size());
- comparable_data.push_back(i);
- return size;
- }()) {}
-
- bool operator==(const Comparable& other) const {
- return comparable_data[other.index_] == comparable_data[index_];
- }
-
- friend bool operator==(const Comparable& lhs, long long rhs) { return comparable_data[lhs.index_] == rhs; }
-};
-
constexpr bool test() {
- types::for_each(types::type_list<char, short, int, long, long long,
- TriviallyComparable<char>, TriviallyComparable<wchar_t>>{},
+ types::for_each(types::type_list<char, short, int, long, long long>{},
[]<class T> {
types::for_each(types::cpp20_input_iterator_list<T*>{},
[]<class Iter> {
@@ -220,11 +173,10 @@ constexpr bool test() {
[&](int i) { ++projection_count; return i; });
assert(ret);
assert(projection_count == 3);
+ projection_count = 0;
}
{
- projection_count = 0;
- auto range = std::ranges::subrange(a, a + 5);
- bool ret = std::ranges::contains(range, 0, [&](int i) { ++projection_count; return i; });
+ bool ret = std::ranges::contains(a, 0, [&](int i) { ++projection_count; return i; });
assert(ret);
assert(projection_count == 3);
}
@@ -237,16 +189,5 @@ int main(int, char**) {
test();
static_assert(test());
- types::for_each(types::type_list<Comparable<char>, Comparable<wchar_t>>{},
- []<class T> {
- types::for_each(types::cpp20_input_iterator_list<T*>{},
- []<class Iter> {
- if constexpr (std::forward_iterator<Iter>)
- test_iterators<Iter>();
- test_iterators<Iter, sentinel_wrapper<Iter>>();
- test_iterators<Iter, sized_sentinel<Iter>>();
- });
- });
-
return 0;
}
>From 51672ee44126e637c8f98331ec999d7e8ad22294 Mon Sep 17 00:00:00 2001
From: Zijun Zhao <zijunzhao at google.com>
Date: Fri, 13 Oct 2023 07:28:48 -0700
Subject: [PATCH 15/15] reformat
---
libcxx/include/__algorithm/ranges_contains.h | 4 +-
.../alg.contains/ranges.contains.pass.cpp | 40 ++++++++++---------
2 files changed, 24 insertions(+), 20 deletions(-)
diff --git a/libcxx/include/__algorithm/ranges_contains.h b/libcxx/include/__algorithm/ranges_contains.h
index 08d5305477889be..f0047960a6f774e 100644
--- a/libcxx/include/__algorithm/ranges_contains.h
+++ b/libcxx/include/__algorithm/ranges_contains.h
@@ -43,8 +43,8 @@ struct __fn {
requires indirect_binary_predicate<ranges::equal_to, projected<iterator_t<_Range>, _Proj>, const _Type*>
_LIBCPP_NODISCARD_EXT _LIBCPP_HIDE_FROM_ABI constexpr bool
operator()(_Range&& __range, const _Type& __value, _Proj __proj = {}) const {
- return ranges::find(ranges::begin(__range), ranges::end(__range), __value,
- std::ref(__proj)) != ranges::end(__range);
+ return ranges::find(ranges::begin(__range), ranges::end(__range), __value, std::ref(__proj)) !=
+ ranges::end(__range);
}
};
} // namespace __contains
diff --git a/libcxx/test/std/algorithms/alg.nonmodifying/alg.contains/ranges.contains.pass.cpp b/libcxx/test/std/algorithms/alg.nonmodifying/alg.contains/ranges.contains.pass.cpp
index b98f1c86b75546b..64a88e46f2c2fc0 100644
--- a/libcxx/test/std/algorithms/alg.nonmodifying/alg.contains/ranges.contains.pass.cpp
+++ b/libcxx/test/std/algorithms/alg.nonmodifying/alg.contains/ranges.contains.pass.cpp
@@ -60,12 +60,11 @@ static_assert(!HasContainsR<InputRangeNotSentinelEqualityComparableWith, int>);
template <class Iter, class Sent = Iter>
constexpr void test_iterators() {
using ValueT = std::iter_value_t<Iter>;
- { // simple tests
+ { // simple tests
ValueT a[] = {1, 2, 3, 4, 5, 6};
auto whole = std::ranges::subrange(Iter(a), Sent(Iter(a + 6)));
{
- std::same_as<bool> decltype(auto) ret =
- std::ranges::contains(whole.begin(), whole.end(), 3);
+ std::same_as<bool> decltype(auto) ret = std::ranges::contains(whole.begin(), whole.end(), 3);
assert(ret);
}
{
@@ -147,36 +146,41 @@ constexpr void test_iterators() {
}
{
auto range = std::ranges::subrange(a, a + 5);
- bool ret = std::ranges::contains(range, -13, [&](int i) { return i * -1; });
+ bool ret = std::ranges::contains(range, -13, [&](int i) { return i * -1; });
assert(ret);
}
}
}
constexpr bool test() {
- types::for_each(types::type_list<char, short, int, long, long long>{},
- []<class T> {
- types::for_each(types::cpp20_input_iterator_list<T*>{},
- []<class Iter> {
- if constexpr (std::forward_iterator<Iter>)
- test_iterators<Iter>();
- test_iterators<Iter, sentinel_wrapper<Iter>>();
- test_iterators<Iter, sized_sentinel<Iter>>();
- });
- });
+ types::for_each(
+ types::type_list<char, short, int, long, long long>{},
+ []<class T> {
+ types::for_each(types::cpp20_input_iterator_list<T*>{}, []<class Iter> {
+ if constexpr (std::forward_iterator<Iter>)
+ test_iterators<Iter>();
+ test_iterators<Iter, sentinel_wrapper<Iter>>();
+ test_iterators<Iter, sized_sentinel<Iter>>();
+ });
+ });
{ // count invocations of the projection
- int a[] = {1, 9, 0, 13, 25};
+ int a[] = {1, 9, 0, 13, 25};
int projection_count = 0;
{
- bool ret = std::ranges::contains(a, a + 5, 0,
- [&](int i) { ++projection_count; return i; });
+ bool ret = std::ranges::contains(a, a + 5, 0, [&](int i) {
+ ++projection_count;
+ return i;
+ });
assert(ret);
assert(projection_count == 3);
projection_count = 0;
}
{
- bool ret = std::ranges::contains(a, 0, [&](int i) { ++projection_count; return i; });
+ bool ret = std::ranges::contains(a, 0, [&](int i) {
+ ++projection_count;
+ return i;
+ });
assert(ret);
assert(projection_count == 3);
}
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