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/* -*- mode: C++; indent-tabs-mode: nil; -*-
*
* This file is a part of LEMON, a generic C++ optimization library.
*
* Copyright (C) 2003-2013
* Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport
* (Egervary Research Group on Combinatorial Optimization, EGRES).
*
* Permission to use, modify and distribute this software is granted
* provided that this copyright notice appears in all copies. For
* precise terms see the accompanying LICENSE file.
*
* This software is provided "AS IS" with no warranty of any kind,
* express or implied, and with no claim as to its suitability for any
* purpose.
*
*/
#ifndef LEMON_CONCEPTS_MAPS_H
#define LEMON_CONCEPTS_MAPS_H
#include <lemon/core.h>
#include <lemon/concept_check.h>
///\ingroup map_concepts
///\file
///\brief The concept of maps.
namespace lemon {
namespace concepts {
/// \addtogroup map_concepts
/// @{
/// Readable map concept
/// Readable map concept.
///
template<typename K, typename T>
class ReadMap
{
public:
/// The key type of the map.
typedef K Key;
/// \brief The value type of the map.
/// (The type of objects associated with the keys).
typedef T Value;
/// Returns the value associated with the given key.
Value operator[](const Key &) const {
return *(static_cast<Value *>(0)+1);
}
template<typename _ReadMap>
struct Constraints {
void constraints() {
Value val = m[key];
val = m[key];
typename _ReadMap::Value own_val = m[own_key];
own_val = m[own_key];
::lemon::ignore_unused_variable_warning(key);
::lemon::ignore_unused_variable_warning(val);
::lemon::ignore_unused_variable_warning(own_key);
::lemon::ignore_unused_variable_warning(own_val);
}
const Key& key;
const typename _ReadMap::Key& own_key;
const _ReadMap& m;
Constraints() {}
};
};
/// Writable map concept
/// Writable map concept.
///
template<typename K, typename T>
class WriteMap
{
public:
/// The key type of the map.
typedef K Key;
/// \brief The value type of the map.
/// (The type of objects associated with the keys).
typedef T Value;
/// Sets the value associated with the given key.
void set(const Key &, const Value &) {}
/// Default constructor.
WriteMap() {}
template <typename _WriteMap>
struct Constraints {
void constraints() {
m.set(key, val);
m.set(own_key, own_val);
::lemon::ignore_unused_variable_warning(key);
::lemon::ignore_unused_variable_warning(val);
::lemon::ignore_unused_variable_warning(own_key);
::lemon::ignore_unused_variable_warning(own_val);
}
const Key& key;
const Value& val;
const typename _WriteMap::Key& own_key;
const typename _WriteMap::Value& own_val;
_WriteMap& m;
Constraints() {}
};
};
/// Read/writable map concept
/// Read/writable map concept.
///
template<typename K, typename T>
class ReadWriteMap : public ReadMap<K,T>,
public WriteMap<K,T>
{
public:
/// The key type of the map.
typedef K Key;
/// \brief The value type of the map.
/// (The type of objects associated with the keys).
typedef T Value;
/// Returns the value associated with the given key.
Value operator[](const Key &) const {
Value *r = 0;
return *r;
}
/// Sets the value associated with the given key.
void set(const Key &, const Value &) {}
template<typename _ReadWriteMap>
struct Constraints {
void constraints() {
checkConcept<ReadMap<K, T>, _ReadWriteMap >();
checkConcept<WriteMap<K, T>, _ReadWriteMap >();
}
};
};
/// Dereferable map concept
/// Dereferable map concept.
///
template<typename K, typename T, typename R, typename CR>
class ReferenceMap : public ReadWriteMap<K,T>
{
public:
/// Tag for reference maps.
typedef True ReferenceMapTag;
/// The key type of the map.
typedef K Key;
/// \brief The value type of the map.
/// (The type of objects associated with the keys).
typedef T Value;
/// The reference type of the map.
typedef R Reference;
/// The const reference type of the map.
typedef CR ConstReference;
public:
/// Returns a reference to the value associated with the given key.
Reference operator[](const Key &) {
Value *r = 0;
return *r;
}
/// Returns a const reference to the value associated with the given key.
ConstReference operator[](const Key &) const {
Value *r = 0;
return *r;
}
/// Sets the value associated with the given key.
void set(const Key &k,const Value &t) { operator[](k)=t; }
template<typename _ReferenceMap>
struct Constraints {
typename enable_if<typename _ReferenceMap::ReferenceMapTag, void>::type
constraints() {
checkConcept<ReadWriteMap<K, T>, _ReferenceMap >();
ref = m[key];
m[key] = val;
m[key] = ref;
m[key] = cref;
own_ref = m[own_key];
m[own_key] = own_val;
m[own_key] = own_ref;
m[own_key] = own_cref;
m[key] = m[own_key];
m[own_key] = m[key];
}
const Key& key;
Value& val;
Reference ref;
ConstReference cref;
const typename _ReferenceMap::Key& own_key;
typename _ReferenceMap::Value& own_val;
typename _ReferenceMap::Reference own_ref;
typename _ReferenceMap::ConstReference own_cref;
_ReferenceMap& m;
Constraints() {}
};
};
// @}
} //namespace concepts
} //namespace lemon
#endif
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