lemon-1.2: comparison lemon/kruskal.h

equal deleted inserted replaced

-:6dee89ef8800
+:4e2e1b412334
-/* -*- C++ -*-
+/* -*- mode: C++; indent-tabs-mode: nil; -*-
 *
-* This file is a part of LEMON, a generic C++ optimization library
+* This file is a part of LEMON, a generic C++ optimization library.
 *
 * Copyright (C) 2003-2008
 * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport
 * (Egervary Research Group on Combinatorial Optimization, EGRES).
 *
 // Kruskal for directed graphs.
 template <typename Digraph, typename In, typename Out>
 typename disable_if<lemon::UndirectedTagIndicator<Digraph>,
-		       typename In::value_type::second_type >::type
+typename In::value_type::second_type >::type
 kruskal(const Digraph& digraph, const In& in, Out& out,dummy<0> = 0) {
 typedef typename In::value_type::second_type Value;
 typedef typename Digraph::template NodeMap<int> IndexMap;
 typedef typename Digraph::Node Node;
 IndexMap index(digraph);
 UnionFind<IndexMap> uf(index);
 for (typename Digraph::NodeIt it(digraph); it != INVALID; ++it) {
 uf.insert(it);
 }
 Value tree_value = 0;
 for (typename In::const_iterator it = in.begin(); it != in.end(); ++it) {
 if (uf.join(digraph.target(it->first),digraph.source(it->first))) {
 out.set(it->first, true);
 tree_value += it->second;
 // Kruskal for undirected graphs.
 template <typename Graph, typename In, typename Out>
 typename enable_if<lemon::UndirectedTagIndicator<Graph>,
-		       typename In::value_type::second_type >::type
+typename In::value_type::second_type >::type
 kruskal(const Graph& graph, const In& in, Out& out,dummy<1> = 1) {
 typedef typename In::value_type::second_type Value;
 typedef typename Graph::template NodeMap<int> IndexMap;
 typedef typename Graph::Node Node;
 IndexMap index(graph);
 UnionFind<IndexMap> uf(index);
 for (typename Graph::NodeIt it(graph); it != INVALID; ++it) {
 uf.insert(it);
 }
 Value tree_value = 0;
 for (typename In::const_iterator it = in.begin(); it != in.end(); ++it) {
 if (uf.join(graph.u(it->first),graph.v(it->first))) {
 out.set(it->first, true);
 tree_value += it->second;
 template <typename Sequence>
 struct PairComp {
 typedef typename Sequence::value_type Value;
 bool operator()(const Value& left, const Value& right) {
-	return left.second < right.second;
+return left.second < right.second;
 }
 };
 template <typename In, typename Enable = void>
 struct SequenceInputIndicator {
 static const bool value = false;
 };
 template <typename In>
 struct SequenceInputIndicator<In,
 typename exists<typename In::value_type::first_type>::type> {
 static const bool value = true;
 };
 template <typename In, typename Enable = void>
 struct MapInputIndicator {
 static const bool value = false;
 };
 template <typename In>
 struct MapInputIndicator<In,
 typename exists<typename In::Value>::type> {
 static const bool value = true;
 };
 template <typename In, typename Enable = void>
 struct SequenceOutputIndicator {
 static const bool value = false;
 };
 template <typename Out>
 struct SequenceOutputIndicator<Out,
 typename exists<typename Out::value_type>::type> {
 static const bool value = true;
 };
 template <typename Out, typename Enable = void>
 struct MapOutputIndicator {
 static const bool value = false;
 };
 template <typename Out>
 struct MapOutputIndicator<Out,
 typename exists<typename Out::Value>::type> {
 static const bool value = true;
 };
 template <typename In, typename InEnable = void>
 struct KruskalValueSelector {};
 template <typename In>
 struct KruskalValueSelector<In,
 typename enable_if<SequenceInputIndicator<In>, void>::type>
 {
 typedef typename In::value_type::second_type Value;
 };
 template <typename In>
 struct KruskalValueSelector<In,
 typename enable_if<MapInputIndicator<In>, void>::type>
 {
 typedef typename In::Value Value;
 };
 template <typename Graph, typename In, typename Out,
 typename InEnable = void>
 struct KruskalInputSelector {};
 template <typename Graph, typename In, typename Out,
 typename InEnable = void>
 struct KruskalOutputSelector {};
 template <typename Graph, typename In, typename Out>
 struct KruskalInputSelector<Graph, In, Out,
 typename enable_if<SequenceInputIndicator<In>, void>::type >
 {
 typedef typename In::value_type::second_type Value;
 static Value kruskal(const Graph& graph, const In& in, Out& out) {
 return KruskalOutputSelector<Graph, In, Out>::
 };
 template <typename Graph, typename In, typename Out>
 struct KruskalInputSelector<Graph, In, Out,
 typename enable_if<MapInputIndicator<In>, void>::type >
 {
 typedef typename In::Value Value;
 static Value kruskal(const Graph& graph, const In& in, Out& out) {
 typedef typename In::Key MapArc;
 typedef typename In::Value Value;
 typedef typename ItemSetTraits<Graph, MapArc>::ItemIt MapArcIt;
 typedef std::vector<std::pair<MapArc, Value> > Sequence;
 Sequence seq;
 for (MapArcIt it(graph); it != INVALID; ++it) {
 seq.push_back(std::make_pair(it, in[it]));
 }
 std::sort(seq.begin(), seq.end(), PairComp<Sequence>());
 typedef T type;
 };
 template <typename Graph, typename In, typename Out>
 struct KruskalOutputSelector<Graph, In, Out,
 typename enable_if<SequenceOutputIndicator<Out>, void>::type >
 {
 typedef typename In::value_type::second_type Value;
 static Value kruskal(const Graph& graph, const In& in, Out& out) {
 typedef LoggerBoolMap<typename RemoveConst<Out>::type> Map;
 };
 template <typename Graph, typename In, typename Out>
 struct KruskalOutputSelector<Graph, In, Out,
 typename enable_if<MapOutputIndicator<Out>, void>::type >
 {
 typedef typename In::value_type::second_type Value;
 static Value kruskal(const Graph& graph, const In& in, Out& out) {
 return _kruskal_bits::kruskal(graph, in, out);
 /// \ingroup spantree
 ///
 /// \brief Kruskal algorithm to find a minimum cost spanning tree of
 /// a graph.
 ///
 /// This function runs Kruskal's algorithm to find a minimum cost
 /// spanning tree.
 /// Due to some C++ hacking, it accepts various input and output types.
 ///
 /// \param g The graph the algorithm runs on.
 /// It can be either \ref concepts::Digraph "directed" or
 /// \ref concepts::Graph "undirected".
 /// If the graph is directed, the algorithm consider it to be
 /// undirected by disregarding the direction of the arcs.
 ///
 /// \param in This object is used to describe the arc/edge costs.
 /// It can be one of the following choices.
 /// - An STL compatible 'Forward Container' with
 /// <tt>std::pair<GR::Arc,X></tt> or
 /// <tt>std::pair<GR::Edge,X></tt> as its <tt>value_type</tt>, where
 /// \c X is the type of the costs. The pairs indicates the arcs/edges
 /// along with the assigned cost. <em>They must be in a
 /// cost-ascending order.</em>
 /// - Any readable arc/edge map. The values of the map indicate the
 /// arc/edge costs.
 ///
 /// \retval out Here we also have a choice.
 /// - It can be a writable \c bool arc/edge map. After running the
 /// algorithm it will contain the found minimum cost spanning
 ///\code
 /// std::vector<Arc> tree(53);
 /// kruskal(g,cost,tree.begin());
 ///\endcode
 /// Or if we don't know in advance the size of the tree, we can
 /// write this.
 ///\code
 /// std::vector<Arc> tree;
 /// kruskal(g,cost,std::back_inserter(tree));
 ///\endcode
 ///
 /// \return The total cost of the found spanning tree.
 ///
 /// \warning If Kruskal runs on an be consistent of using the same
 ///
 #ifdef DOXYGEN
 template <class Graph, class In, class Out>
 Value kruskal(GR const& g, const In& in, Out& out)
 #else
 template <class Graph, class In, class Out>
 inline typename _kruskal_bits::KruskalValueSelector<In>::Value
 kruskal(const Graph& graph, const In& in, Out& out)
 #endif
 {
 return _kruskal_bits::KruskalInputSelector<Graph, In, Out>::
 kruskal(graph, in, out);
 }
 template <class Graph, class In, class Out>
 inline typename _kruskal_bits::KruskalValueSelector<In>::Value
 kruskal(const Graph& graph, const In& in, const Out& out)
 {
 return _kruskal_bits::KruskalInputSelector<Graph, In, const Out>::
 kruskal(graph, in, out);
 }
 } //namespace lemon
 #endif //LEMON_KRUSKAL_H

changeset 209	765619b7cbb2
parent 194	74cd0c58b348
child 216	6d7bfcf5b48e