From fe88c3464976c554be3a144330bb294e5fefaef9 Mon Sep 17 00:00:00 2001
From: yhirose <yuji.hirose.bug@gmail.com>
Date: Fri, 29 May 2015 00:20:15 -0400
Subject: [PATCH] Changed to allow digits in identifier.

---
 language/parser.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/language/parser.cc b/language/parser.cc
index f96f4f0..99abeb3 100644
--- a/language/parser.cc
+++ b/language/parser.cc
@@ -27,7 +27,7 @@ static auto g_grammar = R"(
     CONDITION_OPERATOR    <-  < ('==' / '!=' / '<=' / '<' / '>=' / '>') > _
     TERM_OPERATOR         <-  < [-+] > _
     FACTOR_OPERATOR       <-  < [*/%] > _
-    IDENTIFIER            <-  < [a-zA-Z_]+ > _
+    IDENTIFIER            <-  < [a-zA-Z_][a-zA-Z0-9_]* > _
 
     NUMBER                <-  < [0-9]+ > _
     BOOLEAN               <-  < ('true' / 'false') > _