From 5706fbd8905ae66191579b91d116f21d3844e4ed Mon Sep 17 00:00:00 2001
From: rlar <rlar>
Date: Sun, 4 Oct 2015 21:15:41 +0200
Subject: [PATCH] parser/inpptree-parser.y, bug fix, allow unary `+'

reported by Andy Fierman on the ngspice-users mailing list in message
  "Help to identify 'parameter value out of range or the wrong type' error please?"
---
 src/spicelib/parser/inpptree-parser.y | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/spicelib/parser/inpptree-parser.y b/src/spicelib/parser/inpptree-parser.y
index c12f0963d..53fd3d884 100644
--- a/src/spicelib/parser/inpptree-parser.y
+++ b/src/spicelib/parser/inpptree-parser.y
@@ -96,6 +96,7 @@ exp:
   | '(' exp ')'                       { $$ = $2; }
 
   | '-' exp  %prec NEG                { $$ = PT_mkfnode("-",$2); }
+  | '+' exp  %prec NEG                { $$ = $2; }
 
   | TOK_STR '(' nonempty_arglist ')'  { $$ = PT_mkfnode($1, $3);
                                         if (!$$)