From 64ef102183a4e0ffee18a94dfabd85252428168e Mon Sep 17 00:00:00 2001
From: Connor Olding <cloningdonor@gmail.com>
Date: Sun, 27 Nov 2016 21:16:38 -0800
Subject: [PATCH] disallow variable names beginning with a number

this makes lexing easier.
i don't think this worked properly anyway.
---
 lips/Lexer.lua | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/lips/Lexer.lua b/lips/Lexer.lua
index 95aaf32..22cd5cb 100644
--- a/lips/Lexer.lua
+++ b/lips/Lexer.lua
@@ -394,6 +394,9 @@ function Lexer:lex(_yield)
         elseif self.chr == '[' then
             self:nextc()
             local buff = self:read_chars('[%w_]')
+            if buff:match('^%d') then
+                self:error('variable names cannot begin with a number')
+            end
             if self.chr ~= ']' then
                 self:error('invalid variable name')
             end