From a0058802194eb743f9413cc3abfa60c5bedb58e5 Mon Sep 17 00:00:00 2001
From: Martin Odersky <odersky@gmail.com>
Date: Wed, 5 Mar 2003 13:27:12 +0000
Subject: *** empty log message ***

---
 sources/scalac/ast/Tree.java          | 11 +++++++++++
 sources/scalac/ast/parser/Parser.java |  8 ++------
 2 files changed, 13 insertions(+), 6 deletions(-)

(limited to 'sources/scalac/ast')

diff --git a/sources/scalac/ast/Tree.java b/sources/scalac/ast/Tree.java
index a60f6fe8ed..d7e54dfc52 100644
--- a/sources/scalac/ast/Tree.java
+++ b/sources/scalac/ast/Tree.java
@@ -9,6 +9,7 @@
 package scalac.ast;
 
 import scalac.ast.printer.*;
+import scalac.Global;
 import scalac.util.Debug;
 import scalac.util.Name;
 import scalac.util.Position;
@@ -888,4 +889,14 @@ public class Tree {
     }
 
     //########################################################################
+    // duplication
+
+    public static Transformer duplicator =
+       new Transformer(
+	    Global.instance, null, Global.instance.make,
+	    new StrictTreeFactory(Global.instance.make));
+
+    public Tree duplicate() {
+	return duplicator.transform(this);
+    }
 }
diff --git a/sources/scalac/ast/parser/Parser.java b/sources/scalac/ast/parser/Parser.java
index 6f2ddb5d0f..2dca2ce14e 100644
--- a/sources/scalac/ast/parser/Parser.java
+++ b/sources/scalac/ast/parser/Parser.java
@@ -32,13 +32,9 @@ public class Parser implements Tokens {
      */
     TreeFactory make;
 
-    final Transformer duplicator;
-
     public Parser(Unit unit) {
         s = new Scanner(unit);
         make = unit.global.make;
-	this.duplicator = new Transformer(
-	    unit.global, null, make, new StrictTreeFactory(make));
     }
 
     /** this is the general parse method
@@ -216,7 +212,7 @@ public class Parser implements Tokens {
 		System.arraycopy(enums, 2, newenums, 1, newenums.length - 1);
 		newenums[0] = make.PatDef(
 		    enums[0].pos, mods, pat,
-		    makeFor1(enums[1].pos, Names.filter, duplicator.transform(pat), rhs, enums[1]));
+		    makeFor1(enums[1].pos, Names.filter, pat.duplicate(), rhs, enums[1]));
 		return makeFor(pos, newenums, mapName, flatmapName, body);
 	    }
 	default:
@@ -946,7 +942,7 @@ public class Parser implements Tokens {
 			rhs.pos,
 			new Tree.CaseDef[]{
 			    (CaseDef)make.CaseDef(
-				rhs.pos, duplicator.transform(pat), Tree.Empty,
+				rhs.pos, pat.duplicate(), Tree.Empty,
 				make.Select(rhs.pos,
 				    scalaDot(rhs.pos, Names.Boolean), Names.True)),
 			    (CaseDef)make.CaseDef(
-- 
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