From e264c04f542a22ae89823409b2439b5e6a540ff7 Mon Sep 17 00:00:00 2001
From: JohanWiltink <github@jmw.dds.nl>
Date: Tue, 5 Jul 2022 16:21:37 +0200
Subject: [PATCH] Allow negative numbers in source

---
 lambdacalc.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lambdacalc.js b/lambdacalc.js
index ac6ab70..c7a39ac 100644
--- a/lambdacalc.js
+++ b/lambdacalc.js
@@ -21,7 +21,7 @@ CodeMirror.defineMode("lambdacalc", function(_config, modeConfig) {
   const assign = /=/
   const brack = /\(|\)/
   const lamArg = /[a-zA-Z_][a-zA-Z0-9_\-']*|\./
-  const numconst = /\d+/
+  const numconst = /-?\d+/
 
   function expectDefOrTerm(stream, state) {
     if (stream.match(/.*=/, false)) return expectDef(stream, state);