1 files changed, 41 insertions, 0 deletions
diff --git a/syntaxtree/NodeOptional.java b/syntaxtree/NodeOptional.java
new file mode 100644
index 0000000..d9a8c43
--- /dev/null
+++ b/syntaxtree/NodeOptional.java
@@ -0,0 +1,41 @@
+//
+// Generated by JTB 1.3.2
+//
+
+package syntaxtree;
+
+/**
+ * Represents an grammar optional node, e.g. ( A )? or [ A ]
+ */
+public class NodeOptional implements Node {
+   public NodeOptional() {
+      node = null;
+   }
+
+   public NodeOptional(Node n) {
+      addNode(n);
+   }
+
+   public void addNode(Node n)  {
+      if ( node != null)                // Oh oh!
+         throw new Error("Attempt to set optional node twice");
+
+      node = n;
+   }
+   public void accept(visitor.Visitor v) {
+      v.visit(this);
+   }
+   public <R,A> R accept(visitor.GJVisitor<R,A> v, A argu) {
+      return v.visit(this,argu);
+   }
+   public <R> R accept(visitor.GJNoArguVisitor<R> v) {
+      return v.visit(this);
+   }
+   public <A> void accept(visitor.GJVoidVisitor<A> v, A argu) {
+      v.visit(this,argu);
+   }
+   public boolean present()   { return node != null; }
+
+   public Node node;
+}
+