From 95070280bac6f1a7fb6fa7af3f885ae3a01cd5e9 Mon Sep 17 00:00:00 2001
From: Thaina Yu <thainayu@gmail.com>
Date: Mon, 18 Mar 2019 13:38:25 +0700
Subject: [PATCH] allow bracket in parameter name

#25
---
 src/NCalc/NCalcLexer.cs | 13 ++++++++++---
 1 file changed, 10 insertions(+), 3 deletions(-)

diff --git a/src/NCalc/NCalcLexer.cs b/src/NCalc/NCalcLexer.cs
index ebdbb43..2d036fc 100644
--- a/src/NCalc/NCalcLexer.cs
+++ b/src/NCalc/NCalcLexer.cs
@@ -1804,18 +1804,25 @@ private void mNAME()
 			DebugLocation(265, 39);
 			// C:\\Users\\sebros\\My Projects\\NCalc\\Grammar\\NCalc.g:265:39: (~ ( ']' ) )*
 			try { DebugEnterSubRule(10);
+			int opened	= 0;
 			while (true)
 			{
 				int alt10=2;
 				try { DebugEnterDecision(10, decisionCanBacktrack[10]);
 				int LA10_0 = input.LA(1);
 
-				if (((LA10_0>='\u0000' && LA10_0<='\\')||(LA10_0>='^' && LA10_0<='\uFFFF')))
+				if (LA10_0 >= '\u0000' || LA10_0 <= '\uFFFF')
+					alt10 = 1;
+					
+				if(LA10_0 == '[')
+					opened++;
+				else if(LA10_0 == ']')
 				{
-					alt10=1;
+					opened--;
+					if(opened < 0)
+						alt10=2;
 				}
 
-
 				} finally { DebugExitDecision(10); }
 				switch ( alt10 )
 				{