From a8fe25baba30b1decd1b69e87db03608e90333a6 Mon Sep 17 00:00:00 2001
From: Mark Liversedge <liversedge@gmail.com>
Date: Fri, 1 Apr 2016 20:16:49 +0100
Subject: [PATCH] Fix const(e)

.. was broken since "e" is a one character symbol
   and we want 2 character symbols.
---
 src/Core/DataFilter.l | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/Core/DataFilter.l b/src/Core/DataFilter.l
index d6920bff6..281f49bdb 100644
--- a/src/Core/DataFilter.l
+++ b/src/Core/DataFilter.l
@@ -103,7 +103,7 @@ int DataFiltercolumn = 1;
 [Ss][Dd]\'                                  return SYMBOL; /* special case */
 [a-zA-Z0-9][a-zA-Z0-9_%™]+                  return SYMBOL; /* symbols can start with 0-9 */
 "x"                                         return SYMBOL; /* the only 1 char symbol allowed */
-
+"e"											return SYMBOL; /* for const(e) */
 
 "+"                                         DataFilterlval.op = ADD; return ADD;
 "-"                                         DataFilterlval.op = SUBTRACT; return SUBTRACT;