From abe5b3a45fc01ff3948fb96dac78e65a7c67d086 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Henrik=20B=C3=B6ving?= <hargonix@gmail.com>
Date: Sun, 29 Nov 2020 21:07:10 +0100
Subject: [PATCH] only allow lower case hex character for jump locations so
 labels like FINISH WORK

---
 src/asm.pest | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/asm.pest b/src/asm.pest
index f53cee1..00d8d99 100644
--- a/src/asm.pest
+++ b/src/asm.pest
@@ -18,11 +18,11 @@ jump_instruction = {"JMP"}
 arg_instruction = {"LDA" | "ADD" | "SUB"}
 no_arg_instruction = { "NOP" }
 
-jump_argument = { jump_location | label}
+jump_argument = { jump_location | label }
 argument = { memory_location | digit_literal }
 memory_location = { "(" ~ ASCII_HEX_DIGIT ~")" }
 digit_literal = {"#" ~ ASCII_HEX_DIGIT}
-jump_location = { ASCII_HEX_DIGIT }
+jump_location = { '0'..'9' | 'a'..'f' }
 
 label = { ASCII_ALPHA_UPPER+ }