1 files changed, 71 insertions, 0 deletions
diff --git a/sources/scalac/ast/TreeList.java b/sources/scalac/ast/TreeList.java
new file mode 100644
index 0000000000..d35627c686
--- /dev/null
+++ b/sources/scalac/ast/TreeList.java
@@ -0,0 +1,71 @@
+/*     ____ ____  ____ ____  ______                                     *\
+**    / __// __ \/ __// __ \/ ____/    SOcos COmpiles Scala             **
+**  __\_ \/ /_/ / /__/ /_/ /\_ \       (c) 2002, LAMP/EPFL              **
+** /_____/\____/\___/\____/____/                                        **
+**                                                                      **
+** $Id
+\*                                                                      */
+
+package scalac.ast;
+
+
+public final class TreeList {
+    Tree[] trees;
+    int len;
+
+    public TreeList(Tree[] ts) {
+	trees = ts;
+	len = ts.length;
+    }
+
+    public TreeList() {
+	this(new Tree[4]);
+	len = 0;
+    }
+
+    public void append(Tree tree) {
+        if (len == trees.length) {
+            Tree[] ts = new Tree[len * 2];
+            System.arraycopy(trees, 0, ts, 0, len);
+            trees = ts;
+        }
+        trees[len++] = tree;
+    }
+
+    public void append(Tree[] ts) {
+        for (int j = 0; j < ts.length; j++)
+            append(ts[j]);
+    }
+
+    public void append(TreeList tl) {
+        for (int j = 0; j < tl.len; j++)
+            append(tl.trees[j]);
+    }
+
+    public int length() {
+        return len;
+    }
+
+    public Tree get(int i) {
+        return trees[i];
+    }
+
+    public Tree first() {
+        return trees[0];
+    }
+
+    public Tree removeLast() {
+        return trees[--len];
+    }
+
+    public Tree[] toArray() {
+        Tree[] ts = new Tree[len];
+        System.arraycopy(trees, 0, ts, 0, len);
+        return ts;
+    }
+
+    public Tree[] copyTo(Tree[] ts) {
+        System.arraycopy(trees, 0, ts, 0, len);
+        return ts;
+    }
+}