From aea1a08d6a9d378137d467d3e1f1ccc40232b725 Mon Sep 17 00:00:00 2001
From: Charlie Stanton <charlie@shtanton.xyz>
Date: Wed, 19 Apr 2023 13:23:47 +0100
Subject: Adds the negate operator

Negates all of the numbers produced by its content subex
---
 subex/parse.go | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'subex/parse.go')

diff --git a/subex/parse.go b/subex/parse.go
index f73d060..8635186 100644
--- a/subex/parse.go
+++ b/subex/parse.go
@@ -238,6 +238,8 @@ func parseSubex(l *RuneReader, minPower int) SubexAST {
 				lhs = SubexASTSum {lhs}
 			case r == '*' && minPower <= 8:
 				lhs = SubexASTProduct {lhs}
+			case r == '-' && minPower <= 8:
+				lhs = SubexASTNegate {lhs}
 			case r == '$' && minPower <= 8:
 				slot := l.next()
 				if slot == eof {
-- 
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