From 4fced0fc39d3aeacb3c6d434aeeb622468a857cc Mon Sep 17 00:00:00 2001
From: Tucker Evans <tuckerevans24@gmail.com>
Date: Mon, 2 Sep 2019 13:34:06 -0400
Subject: Add unary minus to parsing

---
 pc.y | 6 ++++++
 1 file changed, 6 insertions(+)

(limited to 'pc.y')

diff --git a/pc.y b/pc.y
index d679c18..ca94f5d 100644
--- a/pc.y
+++ b/pc.y
@@ -402,5 +402,11 @@ factor
 	{
 		$$ = mktree(NOT, $2, NULL);
 	}
+	|ADDOP factor{
+		if ($1 != SUB)
+			yyerror("SUB NOT CORRECT\n");
+		else
+			$$ = mktree(SUB, $2, NULL);
+	}
 ;
 
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