From 95d82b1fd953a01bc8dadd0c277b79de17b64797 Mon Sep 17 00:00:00 2001
From: Christian Neukirchen <chneukirchen@gmail.com>
Date: Wed, 10 Feb 2016 19:02:45 +0100
Subject: allow environment variables in place of string literals

avoids quoting... numeric values are safe to expand inline already.
---
 README.md | 1 +
 1 file changed, 1 insertion(+)

(limited to 'README.md')

diff --git a/README.md b/README.md
index 1be1677..7057611 100644
--- a/README.md
+++ b/README.md
@@ -171,6 +171,7 @@ Default: `n`.
 	             | =~~               -- case insensitive POSIX Extended Regular Expressions
 	
 	<str>      ::= " ([^"] | "")+ "  -- use "" for a single " inside "
+	             | $[A-Za-z0-9_]     -- environment variable
 
 	<typetest> ::= type ( == | = | != ) ( b | c | d | p | f | l )
 
-- 
cgit 1.4.1