1 files changed, 65 insertions, 0 deletions
diff --git a/sources/meta/scalac/ast/MetaTransformer.java b/sources/meta/scalac/ast/MetaTransformer.java
new file mode 100644
index 0000000000..c4f2794851
--- /dev/null
+++ b/sources/meta/scalac/ast/MetaTransformer.java
@@ -0,0 +1,65 @@
+/*     ____ ____  ____ ____  ______                                     *\
+**    / __// __ \/ __// __ \/ ____/    SOcos COmpiles Scala             **
+**  __\_ \/ /_/ / /__/ /_/ /\_ \       (c) 2002, LAMP/EPFL              **
+** /_____/\____/\___/\____/____/                                        **
+\*                                                                      */
+
+// $Id$
+
+package meta.scalac.ast;
+
+import meta.java.Type;
+
+public class MetaTransformer extends AbstractTreeCaseExpander {
+
+    //########################################################################
+    // Public Methods
+
+    public void printTreeCaseBody(TreeNode node) {
+        if (node.fields == null) {
+            writer.println("return tree;");
+        } else {
+            writer.print("return copy." + node + "(tree");
+            for (int i = 0; i < node.fields.length; i++) {
+                writer.print(", ");
+                if (Tree.isTree(node.fields[i].type))
+                    writer.print("transform(" + node.fields[i] + ")");
+                else
+                    writer.print(node.fields[i].name);
+            }
+            writer.println(");");
+        }
+    }
+
+    public void printTransformArrays() {
+        printTransformArrayOf(tree.t_Tree, false);
+        printTransformArrayOf(tree.t_Trees, false);
+        for (int i = 0; i < tree.nodes.length; i++)
+            for (int j = 0; j < tree.nodes[i].arrays; j++)
+                printTransformArrayOf(tree.nodes[i].getType(j), j == 0);
+    }
+
+    public void printTransformArrayOf(Type type, boolean needCast) {
+        String cast = needCast ? "(" + type + ")" : "";
+        writer.print("public "+type+"[] transform("+type+"[] ts)");
+        writer.lbrace();
+        writer.print("for (int i = 0; i < ts.length; i++)");
+        writer.lbrace();
+        writer.println((needCast?tree.t_Tree:type)+" t = transform(ts[i]);");
+        writer.print("if (t != ts[i])");
+        writer.lbrace();
+        writer.println(type+"[] res = new "+type.newArray("[ts.length]")+";");
+        writer.println("System.arraycopy(ts, 0, res, 0, i);");
+        writer.println("res[i] = "+cast+"t;");
+        writer.println("for (int j = i + 1; j < ts.length; j++)");
+        writer.println("res[j] = "+cast+"transform(ts[j]);");
+        writer.println("return res;");
+        writer.rbrace();
+        writer.rbrace();
+        writer.println("return ts;");
+        writer.rbrace();
+        writer.line();
+    }
+
+    //########################################################################
+}