From 34921e983ecd9e80cf3259bc468d5b028848845e Mon Sep 17 00:00:00 2001
From: Zeno Rogue <zeno@attnam.com>
Date: Sun, 23 Sep 2018 02:33:37 +0200
Subject: [PATCH] fixed unary minus in number parser

---
 util.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/util.cpp b/util.cpp
index dcbd00a7..772723ca 100644
--- a/util.cpp
+++ b/util.cpp
@@ -184,6 +184,7 @@ struct exp_parser {
         }
       if(number == "e") res = exp(1);
       else if(number == "p" || number == "pi") res = M_PI;
+      else if(number == "" && next() == '-') res = 0, prio = 0;
       else if(number == "") at = -1;
       else if(number[0] >= 'a' && number[0] <= 'z') at = -1;
       else { std::stringstream ss; res = 0; ss << number; ss >> res; }