pattern matching encore

1 files changed, 46 insertions, 0 deletions

diff --git a/sources/scalac/transformer/matching/FreshVariableTraverser.java b/sources/scalac/transformer/matching/FreshVariableTraverser.java
new file mode 100644
index 0000000000..7010aae5da
--- /dev/null
+++ b/sources/scalac/transformer/matching/FreshVariableTraverser.java
@@ -0,0 +1,46 @@
+package scalac.transformer.matching ;
+
+import scalac.ast.Traverser ;
+
+import scalac.ast.Tree;
+import Tree.Ident;
+import Tree.Bind;
+
+import scalac.util.Name;
+import scalac.util.FreshNameCreator ;
+
+import scalac.symtab.* ;
+
+import java.util.HashMap;
+import java.util.Vector;
+
+class FreshVariableTraverser extends VariableTraverser {
+
+      int    pos;
+      Symbol owner;
+      FreshNameCreator fresh;
+
+      public HashMap helpMap ;
+
+      public FreshVariableTraverser( int pos,
+                                     Symbol owner,
+                                     FreshNameCreator fresh) {
+            this.pos   = pos;
+            this.owner = owner;
+            this.fresh = fresh;
+
+            helpMap  =  new HashMap();
+      }
+
+      void handleVariableSymbol( Symbol sym ) {
+            Symbol helpVar = new TermSymbol( pos,
+                                             fresh.newName( sym.name
+                                                            .toString() ),
+                                             owner,
+                                             0)
+                  .setType( sym.type() );
+
+            helpMap.put( sym, helpVar );
+      }
+
+}