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https://github.com/LadybirdBrowser/ladybird.git
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7f37a8f60f
This is often more convenient than dealing with iterators. This commit includes a couple conversions to find_value as examples.
57 lines
1.6 KiB
C++
57 lines
1.6 KiB
C++
/*
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* Copyright (c) 2021, the SerenityOS developers.
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <AK/Concepts.h>
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#include <AK/Optional.h>
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#include <AK/Traits.h>
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#include <AK/Types.h>
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namespace AK {
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template<typename TEndIterator, IteratorPairWith<TEndIterator> TIterator, typename TUnaryPredicate>
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[[nodiscard]] constexpr TIterator find_if(TIterator first, TEndIterator last, TUnaryPredicate&& pred)
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{
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for (; first != last; ++first) {
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if (pred(*first)) {
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return first;
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}
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}
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return last;
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}
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template<typename TEndIterator, IteratorPairWith<TEndIterator> TIterator, typename V>
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[[nodiscard]] constexpr TIterator find(TIterator first, TEndIterator last, V const& value)
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{
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return find_if(first, last, [&]<typename T>(T const& entry) { return Traits<T>::equals(entry, value); });
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}
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template<typename TEndIterator, IteratorPairWith<TEndIterator> TIterator, typename V>
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[[nodiscard]] constexpr size_t find_index(TIterator first, TEndIterator last, V const& value)
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requires(requires(TIterator it) { it.index(); })
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{
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return find_if(first, last, [&]<typename T>(T const& entry) { return Traits<T>::equals(entry, value); }).index();
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}
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template<IterableContainer Container, typename TUnaryPredicate>
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[[nodiscard]] constexpr auto find_value(Container const& container, TUnaryPredicate&& pred)
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-> Optional<decltype(*container.begin())>
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{
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auto it = find_if(container.begin(), container.end(), forward<TUnaryPredicate>(pred));
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if (it != container.end())
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return *it;
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return {};
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}
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}
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#if USING_AK_GLOBALLY
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using AK::find;
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using AK::find_if;
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using AK::find_index;
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using AK::find_value;
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#endif
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