From e610f2699871112915e9ce1d4af64c5a99906bea Mon Sep 17 00:00:00 2001
From: Sam Harwell <sam@tunnelvisionlabs.com>
Date: Sun, 18 Nov 2012 18:13:49 -0600
Subject: [PATCH] Fix support for the special token reference `EOF`

---
 tool/src/org/antlr/v4/Tool.java | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/tool/src/org/antlr/v4/Tool.java b/tool/src/org/antlr/v4/Tool.java
index 16780393c..52f7d7b19 100644
--- a/tool/src/org/antlr/v4/Tool.java
+++ b/tool/src/org/antlr/v4/Tool.java
@@ -463,6 +463,11 @@ public class Tool {
 			public boolean undefined = false;
 			@Override
 			public void tokenRef(TerminalAST ref) {
+				if ("EOF".equals(ref.getText())) {
+					// this is a special predefined reference
+					return;
+				}
+
 				if ( g.isLexer() ) ruleRef(ref, null);
 			}