1.1 --- a/lemon/bits/edge_set_extender.h	Thu Aug 20 22:41:40 2009 +0200
     1.2 +++ b/lemon/bits/edge_set_extender.h	Thu Aug 20 22:45:40 2009 +0200
     1.3 @@ -537,7 +537,7 @@
     1.4        typedef MapExtender<DefaultMap<Graph, Arc, _Value> > Parent;
     1.5  
     1.6      public:
     1.7 -      ArcMap(const Graph& _g) 
     1.8 +      explicit ArcMap(const Graph& _g) 
     1.9  	: Parent(_g) {}
    1.10        ArcMap(const Graph& _g, const _Value& _v) 
    1.11  	: Parent(_g, _v) {}
    1.12 @@ -561,7 +561,7 @@
    1.13        typedef MapExtender<DefaultMap<Graph, Edge, _Value> > Parent;
    1.14  
    1.15      public:
    1.16 -      EdgeMap(const Graph& _g) 
    1.17 +      explicit EdgeMap(const Graph& _g) 
    1.18  	: Parent(_g) {}
    1.19  
    1.20        EdgeMap(const Graph& _g, const _Value& _v) 

     2.1 --- a/lemon/bits/graph_extender.h	Thu Aug 20 22:41:40 2009 +0200
     2.2 +++ b/lemon/bits/graph_extender.h	Thu Aug 20 22:45:40 2009 +0200
     2.3 @@ -604,7 +604,7 @@
     2.4        typedef MapExtender<DefaultMap<Graph, Node, _Value> > Parent;
     2.5  
     2.6      public:
     2.7 -      NodeMap(const Graph& graph)
     2.8 +      explicit NodeMap(const Graph& graph)
     2.9          : Parent(graph) {}
    2.10        NodeMap(const Graph& graph, const _Value& value)
    2.11          : Parent(graph, value) {}
    2.12 @@ -628,7 +628,7 @@
    2.13        typedef MapExtender<DefaultMap<Graph, Arc, _Value> > Parent;
    2.14  
    2.15      public:
    2.16 -      ArcMap(const Graph& graph)
    2.17 +      explicit ArcMap(const Graph& graph)
    2.18          : Parent(graph) {}
    2.19        ArcMap(const Graph& graph, const _Value& value)
    2.20          : Parent(graph, value) {}
    2.21 @@ -652,7 +652,7 @@
    2.22        typedef MapExtender<DefaultMap<Graph, Edge, _Value> > Parent;
    2.23  
    2.24      public:
    2.25 -      EdgeMap(const Graph& graph)
    2.26 +      explicit EdgeMap(const Graph& graph)
    2.27          : Parent(graph) {}
    2.28  
    2.29        EdgeMap(const Graph& graph, const _Value& value)