| //===----------------------------------------------------------------------===// |
| // |
| // 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 |
| |
| // template<input_iterator I, sentinel_for<I> S, class Proj = identity, |
| // indirect_unary_predicate<projected<I, Proj>> Pred> |
| // constexpr bool ranges::none_of(I first, S last, Pred pred, Proj proj = {}); |
| // template<input_range R, class Proj = identity, |
| // indirect_unary_predicate<projected<iterator_t<R>, Proj>> Pred> |
| // constexpr bool ranges::none_of(R&& r, Pred pred, Proj proj = {}); |
| |
| #include <algorithm> |
| #include <array> |
| #include <cassert> |
| #include <ranges> |
| |
| #include "almost_satisfies_types.h" |
| #include "test_iterators.h" |
| |
| struct UnaryFunctor { |
| bool operator()(auto&&); |
| }; |
| |
| template <class It, class Sent = sentinel_wrapper<It>> |
| concept HasNoneOfIt = requires(It first, Sent last) { std::ranges::none_of(first, last, UnaryFunctor{}); }; |
| |
| static_assert(HasNoneOfIt<int*>); |
| static_assert(!HasNoneOfIt<InputIteratorNotDerivedFrom>); |
| static_assert(!HasNoneOfIt<InputIteratorNotIndirectlyReadable>); |
| static_assert(!HasNoneOfIt<InputIteratorNotInputOrOutputIterator>); |
| static_assert(!HasNoneOfIt<int*, SentinelForNotSemiregular>); |
| static_assert(!HasNoneOfIt<int*, SentinelForNotWeaklyEqualityComparableWith>); |
| |
| template <class Func> |
| concept HasNoneOfItFunc = requires(int* ptr) { std::ranges::none_of(ptr, ptr, Func{}); }; |
| |
| static_assert(HasNoneOfItFunc<UnaryFunctor>); |
| static_assert(!HasNoneOfItFunc<IndirectUnaryPredicateNotCopyConstructible>); |
| static_assert(!HasNoneOfItFunc<IndirectUnaryPredicateNotPredicate>); |
| |
| template <class Range> |
| concept HasNoneOfR = requires(Range range) { std::ranges::none_of(range, UnaryFunctor{}); }; |
| |
| static_assert(HasNoneOfR<std::array<int, 10>>); |
| static_assert(!HasNoneOfR<InputRangeNotDerivedFrom>); |
| static_assert(!HasNoneOfR<InputRangeNotIndirectlyReadable>); |
| static_assert(!HasNoneOfR<InputRangeNotInputOrOutputIterator>); |
| static_assert(!HasNoneOfR<InputRangeNotSentinelSemiregular>); |
| static_assert(!HasNoneOfR<InputRangeNotSentinelEqualityComparableWith>); |
| |
| template <class Func> |
| concept HasNoneOfRFunc = requires(std::array<int, 10> range) { std::ranges::none_of(range, Func{}); }; |
| |
| static_assert(HasNoneOfRFunc<UnaryFunctor>); |
| static_assert(!HasNoneOfRFunc<IndirectUnaryPredicateNotCopyConstructible>); |
| static_assert(!HasNoneOfRFunc<IndirectUnaryPredicateNotPredicate>); |
| |
| template <class It, class Sent = It> |
| constexpr void test_iterators() { |
| { // simple test |
| { |
| int a[] = {1, 2, 3, 4}; |
| std::same_as<bool> decltype(auto) ret = std::ranges::none_of(It(a), Sent(It(a + 4)), [](int) { return true; }); |
| assert(!ret); |
| } |
| { |
| int a[] = {1, 2, 3, 4}; |
| auto range = std::ranges::subrange(It(a), Sent(It(a + 4))); |
| std::same_as<bool> decltype(auto) ret = std::ranges::none_of(range, [](int) { return true; }); |
| assert(!ret); |
| } |
| } |
| |
| { // check that an empty range works |
| std::array<int, 0> a; |
| assert(std::ranges::none_of(It(a.data()), Sent(It(a.data())), [](int) { return false; })); |
| auto range = std::ranges::subrange(It(a.data()), Sent(It(a.data()))); |
| assert(std::ranges::none_of(range, [](int) { return false; })); |
| } |
| |
| { // check that the complexity requirements are met |
| { |
| int predicateCount = 0; |
| int projectionCount = 0; |
| auto pred = [&](int) { ++predicateCount; return false; }; |
| auto proj = [&](int i) { ++projectionCount; return i; }; |
| std::array a = {9, 7, 5, 3}; |
| assert(std::ranges::none_of(It(a.begin()), Sent(It(a.end())), pred, proj)); |
| assert(predicateCount == 4); |
| assert(projectionCount == 4); |
| } |
| { |
| int predicateCount = 0; |
| int projectionCount = 0; |
| auto pred = [&](int) { ++predicateCount; return false; }; |
| auto proj = [&](int i) { ++projectionCount; return i; }; |
| std::array a = {9, 7, 5, 3}; |
| auto range = std::ranges::subrange(It(a.data()), Sent(It(a.data() + a.size()))); |
| assert(std::ranges::none_of(range, pred, proj)); |
| assert(predicateCount == 4); |
| assert(projectionCount == 4); |
| } |
| } |
| |
| { // check that true is returned if no element satisfies the condition |
| std::array a = {1, 2, 3, 4}; |
| assert(std::ranges::none_of(It(a.data()), Sent(It(a.data() + a.size())), [](int i) { return i > 5; })); |
| auto range = std::ranges::subrange(It(a.data()), Sent(It(a.data() + a.size()))); |
| assert(std::ranges::none_of(range, [](int i) { return i > 5; })); |
| } |
| |
| { // check that false is returned if all elements satisfy the condition |
| std::array a = {1, 2, 3, 4}; |
| assert(!std::ranges::none_of(It(a.data()), Sent(It(a.data() + a.size())), [](int i) { return i < 5; })); |
| auto range = std::ranges::subrange(It(a.data()), Sent(It(a.data() + a.size()))); |
| assert(!std::ranges::none_of(range, [](int i) { return i < 5; })); |
| } |
| |
| { // check that false is returned if ony one elements satisfies the condition |
| std::array a = {1, 2, 3, 4, 6}; |
| assert(!std::ranges::none_of(It(a.data()), Sent(It(a.data() + a.size())), [](int i) { return i > 5; })); |
| auto range = std::ranges::subrange(It(a.data()), Sent(It(a.data() + a.size()))); |
| assert(!std::ranges::none_of(range, [](int i) { return i > 5; })); |
| } |
| } |
| |
| constexpr bool test() { |
| test_iterators<cpp20_input_iterator<int*>, sentinel_wrapper<cpp20_input_iterator<int*>>>(); |
| test_iterators<forward_iterator<int*>>(); |
| test_iterators<bidirectional_iterator<int*>>(); |
| test_iterators<random_access_iterator<int*>>(); |
| test_iterators<contiguous_iterator<int*>>(); |
| test_iterators<int*>(); |
| |
| { // check that std::invoke is used |
| struct S { int check; int other; }; |
| S a[] = {{1, 2}, {1, 7}, {1, 3}}; |
| assert(std::ranges::none_of(a, a + 3, [](int i) { return i != 1; }, &S::check)); |
| assert(std::ranges::none_of(a, [](int i) { return i != 1; }, &S::check)); |
| } |
| |
| return true; |
| } |
| |
| int main(int, char**) { |
| test(); |
| static_assert(test()); |
| |
| return 0; |
| } |