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/*
* Copyright (C) 2007 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#include <iterator>
namespace WTF {
template<typename KeyTypeArg, typename ValueTypeArg>
struct KeyValuePair;
template<typename HashTableType, typename KeyType, typename MappedType> struct HashTableConstKeysIterator;
template<typename HashTableType, typename KeyType, typename MappedType> struct HashTableConstValuesIterator;
template<typename HashTableType, typename KeyType, typename MappedType> struct HashTableKeysIterator;
template<typename HashTableType, typename KeyType, typename MappedType> struct HashTableValuesIterator;
template<typename HashTableType, typename ValueType> struct HashTableConstIteratorAdapter;
template<typename HashTableType, typename ValueType> struct HashTableIteratorAdapter;
template<typename HashTableType, typename KeyType, typename MappedType> struct HashTableConstIteratorAdapter<HashTableType, KeyValuePair<KeyType, MappedType>> {
public:
using iterator_category = std::forward_iterator_tag;
using value_type = KeyValuePair<KeyType, MappedType>;
using difference_type = ptrdiff_t;
using pointer = const value_type*;
using reference = const value_type&;
private:
typedef KeyValuePair<KeyType, MappedType> ValueType;
public:
typedef HashTableConstKeysIterator<HashTableType, KeyType, MappedType> Keys;
typedef HashTableConstValuesIterator<HashTableType, KeyType, MappedType> Values;
HashTableConstIteratorAdapter() {}
HashTableConstIteratorAdapter(const typename HashTableType::const_iterator& impl) : m_impl(impl) {}
const ValueType* get() const { return (const ValueType*)m_impl.get(); }
const ValueType& operator*() const { return *get(); }
const ValueType* operator->() const { return get(); }
HashTableConstIteratorAdapter& operator++() { ++m_impl; return *this; }
HashTableConstIteratorAdapter& operator++(int) { auto result = *this; ++m_impl; return result; }
Keys keys() { return Keys(*this); }
Values values() { return Values(*this); }
typename HashTableType::const_iterator m_impl;
};
template<typename HashTableType, typename KeyType, typename MappedType> struct HashTableIteratorAdapter<HashTableType, KeyValuePair<KeyType, MappedType>> {
public:
using iterator_category = std::forward_iterator_tag;
using value_type = KeyValuePair<KeyType, MappedType>;
using difference_type = ptrdiff_t;
using pointer = value_type*;
using reference = value_type&;
private:
typedef KeyValuePair<KeyType, MappedType> ValueType;
public:
typedef HashTableKeysIterator<HashTableType, KeyType, MappedType> Keys;
typedef HashTableValuesIterator<HashTableType, KeyType, MappedType> Values;
HashTableIteratorAdapter() {}
HashTableIteratorAdapter(const typename HashTableType::iterator& impl) : m_impl(impl) {}
ValueType* get() const { return (ValueType*)m_impl.get(); }
ValueType& operator*() const { return *get(); }
ValueType* operator->() const { return get(); }
HashTableIteratorAdapter& operator++() { ++m_impl; return *this; }
HashTableIteratorAdapter& operator++(int) { auto result = *this; ++m_impl; return result; }
operator HashTableConstIteratorAdapter<HashTableType, ValueType>() {
typename HashTableType::const_iterator i = m_impl;
return i;
}
Keys keys() { return Keys(*this); }
Values values() { return Values(*this); }
typename HashTableType::iterator m_impl;
};
template<typename HashTableType, typename KeyType, typename MappedType> struct HashTableConstKeysIterator {
public:
using iterator_category = std::forward_iterator_tag;
using value_type = KeyType;
using difference_type = ptrdiff_t;
using pointer = const value_type*;
using reference = const value_type&;
private:
typedef HashTableConstIteratorAdapter<HashTableType, KeyValuePair<KeyType, MappedType>> ConstIterator;
public:
HashTableConstKeysIterator() { }
HashTableConstKeysIterator(const ConstIterator& impl) : m_impl(impl) {}
const KeyType* get() const { return &(m_impl.get()->key); }
const KeyType& operator*() const { return *get(); }
const KeyType* operator->() const { return get(); }
HashTableConstKeysIterator& operator++() { ++m_impl; return *this; }
HashTableConstKeysIterator& operator++(int) { auto result = *this; ++m_impl; return result; }
ConstIterator m_impl;
};
template<typename HashTableType, typename KeyType, typename MappedType> struct HashTableConstValuesIterator {
public:
using iterator_category = std::forward_iterator_tag;
using value_type = MappedType;
using difference_type = ptrdiff_t;
using pointer = const value_type*;
using reference = const value_type&;
private:
typedef HashTableConstIteratorAdapter<HashTableType, KeyValuePair<KeyType, MappedType>> ConstIterator;
public:
HashTableConstValuesIterator() { }
HashTableConstValuesIterator(const ConstIterator& impl) : m_impl(impl) {}
const MappedType* get() const { return std::addressof(m_impl.get()->value); }
const MappedType& operator*() const { return *get(); }
const MappedType* operator->() const { return get(); }
HashTableConstValuesIterator& operator++() { ++m_impl; return *this; }
HashTableConstValuesIterator& operator++(int) { auto result = *this; ++m_impl; return result; }
ConstIterator m_impl;
};
template<typename HashTableType, typename KeyType, typename MappedType> struct HashTableKeysIterator {
public:
using iterator_category = std::forward_iterator_tag;
using value_type = KeyType;
using difference_type = ptrdiff_t;
using pointer = value_type*;
using reference = value_type&;
private:
typedef HashTableIteratorAdapter<HashTableType, KeyValuePair<KeyType, MappedType>> Iterator;
typedef HashTableConstIteratorAdapter<HashTableType, KeyValuePair<KeyType, MappedType>> ConstIterator;
public:
HashTableKeysIterator() { }
HashTableKeysIterator(const Iterator& impl) : m_impl(impl) {}
KeyType* get() const { return &(m_impl.get()->key); }
KeyType& operator*() const { return *get(); }
KeyType* operator->() const { return get(); }
HashTableKeysIterator& operator++() { ++m_impl; return *this; }
HashTableKeysIterator& operator++(int) { auto result = *this; ++m_impl; return result; }
operator HashTableConstKeysIterator<HashTableType, KeyType, MappedType>() {
ConstIterator i = m_impl;
return i;
}
Iterator m_impl;
};
template<typename HashTableType, typename KeyType, typename MappedType> struct HashTableValuesIterator {
public:
using iterator_category = std::forward_iterator_tag;
using value_type = MappedType;
using difference_type = ptrdiff_t;
using pointer = value_type*;
using reference = value_type&;
private:
typedef HashTableIteratorAdapter<HashTableType, KeyValuePair<KeyType, MappedType>> Iterator;
typedef HashTableConstIteratorAdapter<HashTableType, KeyValuePair<KeyType, MappedType>> ConstIterator;
public:
HashTableValuesIterator() { }
HashTableValuesIterator(const Iterator& impl) : m_impl(impl) {}
MappedType* get() const { return std::addressof(m_impl.get()->value); }
MappedType& operator*() const { return *get(); }
MappedType* operator->() const { return get(); }
HashTableValuesIterator& operator++() { ++m_impl; return *this; }
HashTableValuesIterator& operator++(int) { auto result = *this; ++m_impl; return result; }
operator HashTableConstValuesIterator<HashTableType, KeyType, MappedType>() {
ConstIterator i = m_impl;
return i;
}
Iterator m_impl;
};
template<typename T, typename U, typename V>
inline bool operator==(const HashTableConstKeysIterator<T, U, V>& a, const HashTableConstKeysIterator<T, U, V>& b)
{
return a.m_impl == b.m_impl;
}
template<typename T, typename U, typename V>
inline bool operator==(const HashTableConstValuesIterator<T, U, V>& a, const HashTableConstValuesIterator<T, U, V>& b)
{
return a.m_impl == b.m_impl;
}
template<typename T, typename U, typename V>
inline bool operator==(const HashTableKeysIterator<T, U, V>& a, const HashTableKeysIterator<T, U, V>& b)
{
return a.m_impl == b.m_impl;
}
template<typename T, typename U, typename V>
inline bool operator==(const HashTableValuesIterator<T, U, V>& a, const HashTableValuesIterator<T, U, V>& b)
{
return a.m_impl == b.m_impl;
}
} // namespace WTF
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