lemon-0.x: comparison lemon/list

equal deleted inserted replaced

-:f6d07de47328
+:b85bd6b73833
 #include <lemon/bits/alteration_notifier.h>
 #include <lemon/bits/default_map.h>
 #include <lemon/bits/undir_graph_extender.h>
+#include <lemon/error.h>
 #include <list>
 namespace lemon {
 class ListGraphBase {
 ///\warning Edge and node deletions cannot be restored.
 ///\warning Snapshots cannot be nested.
 class Snapshot : protected AlterationNotifier<Node>::ObserverBase,
 		     protected AlterationNotifier<Edge>::ObserverBase
 {
+public:
+class UnsupportedOperation : public LogicError {
+public:
+	virtual const char* exceptionName() const {
+	  return "lemon::ListGraph::Snapshot::UnsupportedOperation";
+	}
+};
 protected:
 ListGraph *g;
 std::list<Node> added_nodes;
 std::list<Edge> added_edges;
 bool active;
 virtual void add(const Node& n) {
 	added_nodes.push_back(n);
 };
-///\bug Exception...
-///
 virtual void erase(const Node&)
 {
-	exit(1);
+	throw UnsupportedOperation();
 }
 virtual void add(const Edge& n) {
 	added_edges.push_back(n);
 };
-///\bug Exception...
-///
 virtual void erase(const Edge&)
 {
-	exit(1);
+	throw UnsupportedOperation();
 }
 ///\bug What is this used for?
 ///
 virtual void build() {}
 	  detach();
 	AlterationNotifier<Edge>::ObserverBase::
 	  detach();
 	g=0;
 }
 public:
 ///Default constructur.
 ///Default constructur.
 ///To actually make a snapshot you must call save().