//
// The LLVM Compiler Infrastructure
//
-// This file was developed by the LLVM research group and is distributed under
-// the University of Illinois Open Source License. See LICENSE.TXT for details.
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
//
template <class GraphType>
struct Inverse {
- GraphType &Graph;
+ const GraphType &Graph;
- inline Inverse(GraphType &G) : Graph(G) {}
+ inline Inverse(const GraphType &G) : Graph(G) {}
+};
+
+// Provide a partial specialization of GraphTraits so that the inverse of an inverse
+// falls back to the original graph.
+template<class T>
+struct GraphTraits<Inverse<Inverse<T> > > {
+ typedef typename GraphTraits<T>::NodeType NodeType;
+ typedef typename GraphTraits<T>::ChildIteratorType ChildIteratorType;
+
+ static NodeType *getEntryNode(Inverse<Inverse<T> > *G) {
+ return GraphTraits<T>::getEntryNode(G->Graph.Graph);
+ }
+
+ static ChildIteratorType child_begin(NodeType* N) {
+ return GraphTraits<T>::child_begin(N);
+ }
+
+ static ChildIteratorType child_end(NodeType* N) {
+ return GraphTraits<T>::child_end(N);
+ }
};
} // End llvm namespace