mutable_set.hpp

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// mutable_set.hpp v1.2
/*
 *  Copyright (c) 2007 Leigh Johnston.
 *
 *  All rights reserved.
 *
 *  Redistribution and use in source and binary forms, with or without
 *  modification, are permitted provided that the following conditions are
 *  met:
 *
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *
 *     * 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.
 *
 *     * Neither the name of Leigh Johnston nor the names of any
 *       other contributors to this software may be used to endorse or
 *       promote products derived from this software without specific prior
 *       written permission.
 *
 *  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "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 THE COPYRIGHT OWNER 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 <neolib/neolib.hpp>
#include <type_traits>
#include <map>
#include <memory>
 
namespace neolib 
{
    template<typename T, typename U = void>
    struct crack_key { typedef T key_type; };
    template<typename T>
    struct crack_key<T, typename std::void_t<typename T::key_type>> { typedef typename T::key_type key_type; };
 
    template <typename Container>
    class mutable_base : public Container
    {
    public:
        typedef Container std_type;
        typedef typename std_type::key_type key_type;
        typedef typename std_type::mapped_type value_type;
    public:
        class iterator : public std_type::iterator
        {
        public:
            typedef typename mutable_base::value_type value_type;
            typedef value_type* pointer;
            typedef value_type& reference;
        public:
            iterator() {}
            iterator(typename std_type::iterator aIterator) : std_type::iterator(aIterator) {}
            pointer operator->() const { return &std_type::iterator::operator*().second; }
            reference operator*() const { return std_type::iterator::operator*().second; }
        };
        class const_iterator : public std_type::const_iterator
        {
        public:
            typedef typename mutable_base::value_type value_type;
            typedef const value_type* pointer;
            typedef const value_type& reference;
        public:
            const_iterator() {}
            const_iterator(typename std_type::const_iterator aIterator) : std_type::const_iterator(aIterator) {}
            const_iterator(typename std_type::iterator aIterator) : std_type::const_iterator(aIterator) {}
            pointer operator->() const { return &std_type::const_iterator::operator*().second; }
            reference operator*() const { return std_type::const_iterator::operator*().second; }
        };
        class reverse_iterator : public std_type::reverse_iterator
        {
        public:
            typedef typename mutable_base::value_type value_type;
            typedef value_type* pointer;
            typedef value_type& reference;
        public:
            reverse_iterator() {}
            reverse_iterator(typename std_type::reverse_iterator aIterator) : std_type::reverse_iterator(aIterator) {}
            pointer operator->() const { return &std_type::reverse_iterator::operator*().second; }
            reference operator*() const { return std_type::reverse_iterator::operator*().second; }
        };
        class const_reverse_iterator : public std_type::const_reverse_iterator
        {
        public:
            typedef typename mutable_base::value_type value_type;
            typedef const value_type* pointer;
            typedef const value_type& reference;
        public:
            const_reverse_iterator() {}
            const_reverse_iterator(typename std_type::const_reverse_iterator aIterator) : std_type::const_reverse_iterator(aIterator) {}
            const_reverse_iterator(typename std_type::reverse_iterator aIterator) : std_type::const_reverse_iterator(aIterator) {}
            pointer operator->() const { return &std_type::const_reverse_iterator::operator*().second; }
            reference operator*() const { return std_type::const_reverse_iterator::operator*().second; }
        };
    public:
        const_iterator cbegin() const { return std_type::cbegin(); }
        const_iterator begin() const { return std_type::begin(); }
        iterator begin() { return std_type::begin(); }
        const_iterator cend() const { return std_type::cend(); }
        const_iterator end() const { return std_type::end(); }
        iterator end() { return std_type::end(); }
        const_reverse_iterator crbegin() const { return std_type::crbegin(); }
        const_reverse_iterator rbegin() const { return std_type::rbegin(); }
        reverse_iterator rbegin() { return std_type::rbegin(); }
        const_reverse_iterator crend() const { return std_type::crend(); }
        const_reverse_iterator rend() const { return std_type::rend(); }
        reverse_iterator rend() { return std_type::rend(); }
        iterator find(const key_type& aKey) { return std_type::find(aKey); }
        const_iterator find(const key_type& aKey) const { return std_type::find(aKey); }
    };
 
    template <typename T, typename Pr = std::less<typename crack_key<T>::key_type>, typename Alloc = std::allocator<std::pair<typename crack_key<T>::key_type const, T> > >
    class mutable_set : public mutable_base<std::map<typename crack_key<T>::key_type, T, Pr, typename std::allocator_traits<Alloc>::template rebind_alloc<std::pair<typename crack_key<T>::key_type const, T>>>>
    {
        typedef mutable_base<std::map<typename crack_key<T>::key_type, T, Pr, typename std::allocator_traits<Alloc>::template rebind_alloc<std::pair<typename crack_key<T>::key_type const, T>>>> base_type;
    public:
        typedef typename crack_key<T>::key_type key_type;
        using typename base_type::const_iterator;
        using typename base_type::iterator;
        using typename base_type::const_reverse_iterator;
        using typename base_type::reverse_iterator;
    public:
        mutable_set()
        {
        }
        mutable_set(std::initializer_list<T> aElements)
        {
            for (auto& e : aElements)
                insert(e);
        }
        template <typename InputIter>
        mutable_set(InputIter aFirst, InputIter aLast)
        {
            for (auto e = aFirst; e != aLast; ++e)
                insert(*e);
        }
    public:
        iterator insert(const typename base_type::value_type& aValue)
        {
            return iterator(base_type::insert(std::make_pair(static_cast<key_type>(aValue), aValue)).first);
        }
        using base_type::find;
        iterator find(const typename base_type::value_type& aValue)
        {
            return iterator(base_type::find(static_cast<key_type>(aValue)));
        }
        const_iterator find(const typename base_type::value_type& aValue) const
        {
            return const_iterator(base_type::find(static_cast<key_type>(aValue)));
        }
    };
 
    template <typename T, typename Pr = std::less<typename crack_key<T>::key_type>, typename Alloc = std::allocator<std::pair<typename crack_key<T>::key_type const, T> > >
    class mutable_multiset : public mutable_base<std::multimap<typename crack_key<T>::key_type, T, Pr, typename std::allocator_traits<Alloc>::template rebind_alloc<std::pair<typename crack_key<T>::key_type const, T>>>>
    {
        typedef mutable_base<std::multimap<typename crack_key<T>::key_type, T, Pr, typename std::allocator_traits<Alloc>::template rebind_alloc<std::pair<typename crack_key<T>::key_type const, T>>>> base_type;
    public:
        typedef typename crack_key<T>::key_type key_type;
        using typename base_type::const_iterator;
        using typename base_type::iterator;
        using typename base_type::const_reverse_iterator;
        using typename base_type::reverse_iterator;
    public:
        mutable_multiset()
        {
        }
        mutable_multiset(std::initializer_list<T> aElements)
        {
            for (auto& e : aElements)
                insert(e);
        }
        template <typename InputIter>
        mutable_multiset(InputIter aFirst, InputIter aLast)
        {
            for (auto e = aFirst; e != aLast; ++e)
                insert(*e);
        }
    public:
        iterator insert(const typename base_type::value_type& aValue)
        {
            return iterator(base_type::insert(std::make_pair(static_cast<key_type>(aValue), aValue)));
        }
        using base_type::find;
        iterator find(const typename base_type::value_type& aValue)
        {
            return iterator(base_type::find(static_cast<key_type>(aValue)));
        }
        const_iterator find(const typename base_type::value_type& aValue) const
        {
            return const_iterator(base_type::find(static_cast<key_type>(aValue)));
        }
    };
}