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* Copyright (C) 2007 Apple Inc. All rights reserved.
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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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* 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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* THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#ifndef WTF_HashIterators_h
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#define WTF_HashIterators_h
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template<typename HashTableType, typename KeyType, typename MappedType> struct HashTableConstKeysIterator;
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template<typename HashTableType, typename KeyType, typename MappedType> struct HashTableConstValuesIterator;
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template<typename HashTableType, typename KeyType, typename MappedType> struct HashTableKeysIterator;
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template<typename HashTableType, typename KeyType, typename MappedType> struct HashTableValuesIterator;
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template<typename HashTableType, typename KeyType, typename MappedType> struct HashTableConstIteratorAdapter<HashTableType, std::pair<KeyType, MappedType> > {
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typedef std::pair<KeyType, MappedType> ValueType;
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typedef HashTableConstKeysIterator<HashTableType, KeyType, MappedType> Keys;
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typedef HashTableConstValuesIterator<HashTableType, KeyType, MappedType> Values;
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HashTableConstIteratorAdapter(const typename HashTableType::const_iterator& impl) : m_impl(impl) {}
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const ValueType* get() const { return (const ValueType*)m_impl.get(); }
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const ValueType& operator*() const { return *get(); }
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const ValueType* operator->() const { return get(); }
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HashTableConstIteratorAdapter& operator++() { ++m_impl; return *this; }
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// postfix ++ intentionally omitted
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Keys keys() { return Keys(*this); }
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Values values() { return Values(*this); }
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typename HashTableType::const_iterator m_impl;
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template<typename HashTableType, typename KeyType, typename MappedType> struct HashTableIteratorAdapter<HashTableType, std::pair<KeyType, MappedType> > {
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typedef std::pair<KeyType, MappedType> ValueType;
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typedef HashTableKeysIterator<HashTableType, KeyType, MappedType> Keys;
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typedef HashTableValuesIterator<HashTableType, KeyType, MappedType> Values;
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HashTableIteratorAdapter(const typename HashTableType::iterator& impl) : m_impl(impl) {}
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ValueType* get() const { return (ValueType*)m_impl.get(); }
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ValueType& operator*() const { return *get(); }
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ValueType* operator->() const { return get(); }
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HashTableIteratorAdapter& operator++() { ++m_impl; return *this; }
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// postfix ++ intentionally omitted
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operator HashTableConstIteratorAdapter<HashTableType, ValueType>() {
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typename HashTableType::const_iterator i = m_impl;
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Keys keys() { return Keys(*this); }
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Values values() { return Values(*this); }
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typename HashTableType::iterator m_impl;
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template<typename HashTableType, typename KeyType, typename MappedType> struct HashTableConstKeysIterator {
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typedef HashTableConstIteratorAdapter<HashTableType, std::pair<KeyType, MappedType> > ConstIterator;
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HashTableConstKeysIterator(const ConstIterator& impl) : m_impl(impl) {}
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const KeyType* get() const { return &(m_impl.get()->first); }
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const KeyType& operator*() const { return *get(); }
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const KeyType* operator->() const { return get(); }
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HashTableConstKeysIterator& operator++() { ++m_impl; return *this; }
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// postfix ++ intentionally omitted
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template<typename HashTableType, typename KeyType, typename MappedType> struct HashTableConstValuesIterator {
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typedef HashTableConstIteratorAdapter<HashTableType, std::pair<KeyType, MappedType> > ConstIterator;
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HashTableConstValuesIterator(const ConstIterator& impl) : m_impl(impl) {}
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const MappedType* get() const { return &(m_impl.get()->second); }
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const MappedType& operator*() const { return *get(); }
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const MappedType* operator->() const { return get(); }
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HashTableConstValuesIterator& operator++() { ++m_impl; return *this; }
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// postfix ++ intentionally omitted
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ConstIterator m_impl;
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template<typename HashTableType, typename KeyType, typename MappedType> struct HashTableKeysIterator {
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typedef HashTableIteratorAdapter<HashTableType, std::pair<KeyType, MappedType> > Iterator;
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typedef HashTableConstIteratorAdapter<HashTableType, std::pair<KeyType, MappedType> > ConstIterator;
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HashTableKeysIterator(const Iterator& impl) : m_impl(impl) {}
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KeyType* get() const { return &(m_impl.get()->first); }
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KeyType& operator*() const { return *get(); }
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KeyType* operator->() const { return get(); }
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HashTableKeysIterator& operator++() { ++m_impl; return *this; }
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// postfix ++ intentionally omitted
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operator HashTableConstKeysIterator<HashTableType, KeyType, MappedType>() {
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ConstIterator i = m_impl;
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template<typename HashTableType, typename KeyType, typename MappedType> struct HashTableValuesIterator {
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typedef HashTableIteratorAdapter<HashTableType, std::pair<KeyType, MappedType> > Iterator;
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typedef HashTableConstIteratorAdapter<HashTableType, std::pair<KeyType, MappedType> > ConstIterator;
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HashTableValuesIterator(const Iterator& impl) : m_impl(impl) {}
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MappedType* get() const { return &(m_impl.get()->second); }
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MappedType& operator*() const { return *get(); }
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MappedType* operator->() const { return get(); }
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HashTableValuesIterator& operator++() { ++m_impl; return *this; }
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// postfix ++ intentionally omitted
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operator HashTableConstValuesIterator<HashTableType, KeyType, MappedType>() {
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ConstIterator i = m_impl;
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template<typename T, typename U, typename V>
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inline bool operator==(const HashTableConstKeysIterator<T, U, V>& a, const HashTableConstKeysIterator<T, U, V>& b)
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return a.m_impl == b.m_impl;
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template<typename T, typename U, typename V>
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inline bool operator!=(const HashTableConstKeysIterator<T, U, V>& a, const HashTableConstKeysIterator<T, U, V>& b)
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return a.m_impl != b.m_impl;
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template<typename T, typename U, typename V>
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inline bool operator==(const HashTableConstValuesIterator<T, U, V>& a, const HashTableConstValuesIterator<T, U, V>& b)
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return a.m_impl == b.m_impl;
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template<typename T, typename U, typename V>
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inline bool operator!=(const HashTableConstValuesIterator<T, U, V>& a, const HashTableConstValuesIterator<T, U, V>& b)
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return a.m_impl != b.m_impl;
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template<typename T, typename U, typename V>
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inline bool operator==(const HashTableKeysIterator<T, U, V>& a, const HashTableKeysIterator<T, U, V>& b)
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return a.m_impl == b.m_impl;
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template<typename T, typename U, typename V>
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inline bool operator!=(const HashTableKeysIterator<T, U, V>& a, const HashTableKeysIterator<T, U, V>& b)
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return a.m_impl != b.m_impl;
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template<typename T, typename U, typename V>
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inline bool operator==(const HashTableValuesIterator<T, U, V>& a, const HashTableValuesIterator<T, U, V>& b)
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return a.m_impl == b.m_impl;
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template<typename T, typename U, typename V>
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inline bool operator!=(const HashTableValuesIterator<T, U, V>& a, const HashTableValuesIterator<T, U, V>& b)
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return a.m_impl != b.m_impl;
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#endif // WTF_HashIterators_h