mirror of
https://github.com/darlinghq/darling-WTF.git
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97 lines
3.3 KiB
C++
97 lines
3.3 KiB
C++
/*
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* Copyright (C) 2013 Apple Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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* THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#include <iterator>
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namespace WTF {
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template<typename Iterator>
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class IteratorRange {
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WTF_MAKE_FAST_ALLOCATED;
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public:
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IteratorRange(Iterator begin, Iterator end)
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: m_begin(WTFMove(begin))
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, m_end(WTFMove(end))
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{
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}
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Iterator begin() const { return m_begin; }
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Iterator end() const { return m_end; }
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private:
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Iterator m_begin;
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Iterator m_end;
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};
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template<typename Iterator>
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IteratorRange<Iterator> makeIteratorRange(Iterator&& begin, Iterator&& end)
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{
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return IteratorRange<Iterator>(std::forward<Iterator>(begin), std::forward<Iterator>(end));
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}
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template<typename Container>
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IteratorRange<typename Container::reverse_iterator> makeReversedRange(Container& container)
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{
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return makeIteratorRange(std::rbegin(container), std::rend(container));
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}
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template<typename Container>
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IteratorRange<typename Container::const_reverse_iterator> makeReversedRange(const Container& container)
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{
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return makeIteratorRange(std::crbegin(container), std::crend(container));
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}
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template<typename Container, typename Iterator>
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class SizedIteratorRange {
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WTF_MAKE_FAST_ALLOCATED;
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public:
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SizedIteratorRange(const Container& container, Iterator begin, Iterator end)
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: m_container(container)
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, m_begin(WTFMove(begin))
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, m_end(WTFMove(end))
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{
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}
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auto size() const -> decltype(std::declval<Container>().size()) { return m_container.size(); }
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bool isEmpty() const { return m_container.isEmpty(); }
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Iterator begin() const { return m_begin; }
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Iterator end() const { return m_end; }
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private:
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const Container& m_container;
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Iterator m_begin;
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Iterator m_end;
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};
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template<typename Container, typename Iterator>
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SizedIteratorRange<Container, Iterator> makeSizedIteratorRange(const Container& container, Iterator&& begin, Iterator&& end)
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{
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return SizedIteratorRange<Container, Iterator>(container, std::forward<Iterator>(begin), std::forward<Iterator>(end));
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}
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} // namespace WTF
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