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authorDaniel Wilhelm <daniel@wili.li>2014-04-18 17:15:16 +0200
committerDaniel Wilhelm <daniel@wili.li>2014-04-18 17:15:16 +0200
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-////////////////////////////////////////////////////////////////////////////////
-// The Loki Library
-// Copyright (c) 2001 by Andrei Alexandrescu
-// This code accompanies the book:
-// Alexandrescu, Andrei. "Modern C++ Design: Generic Programming and Design
-// Patterns Applied". Copyright (c) 2001. Addison-Wesley.
-// Permission to use, copy, modify, distribute and sell this software for any
-// purpose is hereby granted without fee, provided that the above copyright
-// notice appear in all copies and that both that copyright notice and this
-// permission notice appear in supporting documentation.
-// The author or Addison-Wesley Longman make no representations about the
-// suitability of this software for any purpose. It is provided "as is"
-// without express or implied warranty.
-////////////////////////////////////////////////////////////////////////////////
-#ifndef LOKI_ASSOCVECTOR_INC_
-#define LOKI_ASSOCVECTOR_INC_
-
-// $Id: AssocVector.h 765 2006-10-18 13:55:32Z syntheticpp $
-
-
-#include <algorithm>
-#include <functional>
-#include <vector>
-#include <utility>
-
-namespace Loki
-{
-////////////////////////////////////////////////////////////////////////////////
-// class template AssocVectorCompare
-// Used by AssocVector
-////////////////////////////////////////////////////////////////////////////////
-
-namespace Private
-{
-template <class Value, class C>
-class AssocVectorCompare : public C
-{
- typedef std::pair<typename C::first_argument_type, Value>
- Data;
- typedef typename C::first_argument_type first_argument_type;
-
-public:
- AssocVectorCompare()
- {}
-
- AssocVectorCompare(const C& src) : C(src)
- {}
-
- bool operator()(const first_argument_type& lhs,
- const first_argument_type& rhs) const
- { return C::operator()(lhs, rhs); }
-
- bool operator()(const Data& lhs, const Data& rhs) const
- { return operator()(lhs.first, rhs.first); }
-
- bool operator()(const Data& lhs,
- const first_argument_type& rhs) const
- { return operator()(lhs.first, rhs); }
-
- bool operator()(const first_argument_type& lhs,
- const Data& rhs) const
- { return operator()(lhs, rhs.first); }
-};
-}
-
-////////////////////////////////////////////////////////////////////////////////
-// class template AssocVector
-// An associative vector built as a syntactic drop-in replacement for std::map
-// BEWARE: AssocVector doesn't respect all map's guarantees, the most important
-// being:
-// * iterators are invalidated by insert and erase operations
-// * the complexity of insert/erase is O(N) not O(log N)
-// * value_type is std::pair<K, V> not std::pair<const K, V>
-// * iterators are random
-////////////////////////////////////////////////////////////////////////////////
-
-
-template
-<
-class K,
- class V,
- class C = std::less<K>,
- class A = std::allocator< std::pair<K, V> >
- >
-class AssocVector
- : private std::vector< std::pair<K, V>, A >
- , private Private::AssocVectorCompare<V, C>
-{
- typedef std::vector<std::pair<K, V>, A> Base;
- typedef Private::AssocVectorCompare<V, C> MyCompare;
-
-public:
- typedef K key_type;
- typedef V mapped_type;
- typedef typename Base::value_type value_type;
-
- typedef C key_compare;
- typedef A allocator_type;
- typedef typename A::reference reference;
- typedef typename A::const_reference const_reference;
- typedef typename Base::iterator iterator;
- typedef typename Base::const_iterator const_iterator;
- typedef typename Base::size_type size_type;
- typedef typename Base::difference_type difference_type;
- typedef typename A::pointer pointer;
- typedef typename A::const_pointer const_pointer;
- typedef typename Base::reverse_iterator reverse_iterator;
- typedef typename Base::const_reverse_iterator const_reverse_iterator;
-
- class value_compare
- : public std::binary_function<value_type, value_type, bool>
- , private key_compare
- {
- friend class AssocVector;
-
- protected:
- value_compare(key_compare pred) : key_compare(pred)
- {}
-
- public:
- bool operator()(const value_type& lhs, const value_type& rhs) const
- { return key_compare::operator()(lhs.first, rhs.first); }
- };
-
- // 23.3.1.1 construct/copy/destroy
-
- explicit AssocVector(const key_compare& comp = key_compare(),
- const A& alloc = A())
- : Base(alloc), MyCompare(comp)
- {}
-
- template <class InputIterator>
- AssocVector(InputIterator first, InputIterator last,
- const key_compare& comp = key_compare(),
- const A& alloc = A())
- : Base(first, last, alloc), MyCompare(comp)
- {
- MyCompare& me = *this;
- std::sort(begin(), end(), me);
- }
-
- AssocVector& operator=(const AssocVector& rhs)
- {
- AssocVector(rhs).swap(*this);
- return *this;
- }
-
- // iterators:
- // The following are here because MWCW gets 'using' wrong
- iterator begin() { return Base::begin(); }
- const_iterator begin() const { return Base::begin(); }
- iterator end() { return Base::end(); }
- const_iterator end() const { return Base::end(); }
- reverse_iterator rbegin() { return Base::rbegin(); }
- const_reverse_iterator rbegin() const { return Base::rbegin(); }
- reverse_iterator rend() { return Base::rend(); }
- const_reverse_iterator rend() const { return Base::rend(); }
-
- // capacity:
- bool empty() const { return Base::empty(); }
- size_type size() const { return Base::size(); }
- size_type max_size() { return Base::max_size(); }
-
- // 23.3.1.2 element access:
- mapped_type& operator[](const key_type& key)
- { return insert(value_type(key, mapped_type())).first->second; }
-
- // modifiers:
- std::pair<iterator, bool> insert(const value_type& val)
- {
- bool found(true);
- iterator i(lower_bound(val.first));
-
- if (i == end() || this->operator()(val.first, i->first))
- {
- i = Base::insert(i, val);
- found = false;
- }
- return std::make_pair(i, !found);
- }
- //Section [23.1.2], Table 69
- //http://developer.apple.com/documentation/DeveloperTools/gcc-3.3/libstdc++/23_containers/howto.html#4
- iterator insert(iterator pos, const value_type& val)
- {
- if ( (pos == begin() || this->operator()(*(pos - 1), val)) &&
- (pos == end() || this->operator()(val, *pos)) )
- {
- return Base::insert(pos, val);
- }
- return insert(val).first;
- }
-
- template <class InputIterator>
- void insert(InputIterator first, InputIterator last)
- { for (; first != last; ++first) insert(*first); }
-
- void erase(iterator pos)
- { Base::erase(pos); }
-
- size_type erase(const key_type& k)
- {
- iterator i(find(k));
- if (i == end()) return 0;
- erase(i);
- return 1;
- }
-
- void erase(iterator first, iterator last)
- { Base::erase(first, last); }
-
- void swap(AssocVector& other)
- {
- Base::swap(other);
- MyCompare& me = *this;
- MyCompare& rhs = other;
- std::swap(me, rhs);
- }
-
- void clear()
- { Base::clear(); }
-
- // observers:
- key_compare key_comp() const
- { return *this; }
-
- value_compare value_comp() const
- {
- const key_compare& comp = *this;
- return value_compare(comp);
- }
-
- // 23.3.1.3 map operations:
- iterator find(const key_type& k)
- {
- iterator i(lower_bound(k));
- if (i != end() && this->operator()(k, i->first))
- {
- i = end();
- }
- return i;
- }
-
- const_iterator find(const key_type& k) const
- {
- const_iterator i(lower_bound(k));
- if (i != end() && this->operator()(k, i->first))
- {
- i = end();
- }
- return i;
- }
-
- size_type count(const key_type& k) const
- { return find(k) != end(); }
-
- iterator lower_bound(const key_type& k)
- {
- MyCompare& me = *this;
- return std::lower_bound(begin(), end(), k, me);
- }
-
- const_iterator lower_bound(const key_type& k) const
- {
- const MyCompare& me = *this;
- return std::lower_bound(begin(), end(), k, me);
- }
-
- iterator upper_bound(const key_type& k)
- {
- MyCompare& me = *this;
- return std::upper_bound(begin(), end(), k, me);
- }
-
- const_iterator upper_bound(const key_type& k) const
- {
- const MyCompare& me = *this;
- return std::upper_bound(begin(), end(), k, me);
- }
-
- std::pair<iterator, iterator> equal_range(const key_type& k)
- {
- MyCompare& me = *this;
- return std::equal_range(begin(), end(), k, me);
- }
-
- std::pair<const_iterator, const_iterator> equal_range(
- const key_type& k) const
- {
- const MyCompare& me = *this;
- return std::equal_range(begin(), end(), k, me);
- }
-
- template <class K1, class V1, class C1, class A1>
- friend bool operator==(const AssocVector<K1, V1, C1, A1>& lhs,
- const AssocVector<K1, V1, C1, A1>& rhs);
-
- bool operator<(const AssocVector& rhs) const
- {
- const Base& me = *this;
- const Base& yo = rhs;
- return me < yo;
- }
-
- template <class K1, class V1, class C1, class A1>
- friend bool operator!=(const AssocVector<K1, V1, C1, A1>& lhs,
- const AssocVector<K1, V1, C1, A1>& rhs);
-
- template <class K1, class V1, class C1, class A1>
- friend bool operator>(const AssocVector<K1, V1, C1, A1>& lhs,
- const AssocVector<K1, V1, C1, A1>& rhs);
-
- template <class K1, class V1, class C1, class A1>
- friend bool operator>=(const AssocVector<K1, V1, C1, A1>& lhs,
- const AssocVector<K1, V1, C1, A1>& rhs);
-
- template <class K1, class V1, class C1, class A1>
- friend bool operator<=(const AssocVector<K1, V1, C1, A1>& lhs,
- const AssocVector<K1, V1, C1, A1>& rhs);
-};
-
-template <class K, class V, class C, class A>
-inline bool operator==(const AssocVector<K, V, C, A>& lhs,
- const AssocVector<K, V, C, A>& rhs)
-{
- const std::vector<std::pair<K, V>, A>& me = lhs;
- return me == rhs;
-}
-
-template <class K, class V, class C, class A>
-inline bool operator!=(const AssocVector<K, V, C, A>& lhs,
- const AssocVector<K, V, C, A>& rhs)
-{ return !(lhs == rhs); }
-
-template <class K, class V, class C, class A>
-inline bool operator>(const AssocVector<K, V, C, A>& lhs,
- const AssocVector<K, V, C, A>& rhs)
-{ return rhs < lhs; }
-
-template <class K, class V, class C, class A>
-inline bool operator>=(const AssocVector<K, V, C, A>& lhs,
- const AssocVector<K, V, C, A>& rhs)
-{ return !(lhs < rhs); }
-
-template <class K, class V, class C, class A>
-inline bool operator<=(const AssocVector<K, V, C, A>& lhs,
- const AssocVector<K, V, C, A>& rhs)
-{ return !(rhs < lhs); }
-
-
-// specialized algorithms:
-template <class K, class V, class C, class A>
-void swap(AssocVector<K, V, C, A>& lhs, AssocVector<K, V, C, A>& rhs)
-{ lhs.swap(rhs); }
-
-} // namespace Loki
-
-#endif // end file guardian
-
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