From eaca4d39f176acbcc567d0cb18dd9fb6c92ad60d Mon Sep 17 00:00:00 2001
From: Carlo Zancanaro <carlo@pc-4w14-0.cs.usyd.edu.au>
Date: Tue, 10 Jul 2012 13:02:28 +1000
Subject: A few other changes that were needed for tests

I must have forgotten to commit them earlier. How annoying.
---
 impl/EquationSystem.g | 1 +
 1 file changed, 1 insertion(+)

(limited to 'impl/EquationSystem.g')

diff --git a/impl/EquationSystem.g b/impl/EquationSystem.g
index 3a6598a..07e8e71 100644
--- a/impl/EquationSystem.g
+++ b/impl/EquationSystem.g
@@ -30,6 +30,7 @@ expr : '(' expr GREATER_EQUAL expr QUESTION_MARK expr ')' -> ^(GUARD expr expr e
 
 term : NUMBER
      | VARIABLE
+     | '-'^ term
      | '('! expr ')'! ;
 
 
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