From 9bb793c19011c4ca898fac7e82d81dba5e30e117 Mon Sep 17 00:00:00 2001
From: Kevin Brown <kevin@kevin-brown.com>
Date: Fri, 15 May 2020 18:03:35 -0400
Subject: [PATCH] Fix grammar parsing for block separators

Previously this allows blocks to be separated by commas and have one
trailing off. Now this only allows blocks to be properly separated
by commas and trailing comms are no longer allowed. This also now
enforces that when parameters are not separated by commas, they are
spearated by at least one space.
---
 grammar.ebnf | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/grammar.ebnf b/grammar.ebnf
index 127f5675..b1e2295d 100644
--- a/grammar.ebnf
+++ b/grammar.ebnf
@@ -126,14 +126,18 @@ implicit_identifier_tuple
 block_parameters
     =
     @+:block_parameter
-    [ {SP}* "," ]
     {
-        {SP}*
+        block_parameter_separator
         @+:block_parameter
-        [ {SP}* "," ]
      }*
     ;
 
+block_parameter_separator
+    =
+    | ( {SP}* "," {SP}* )
+    | ( {SP}+ )
+    ;
+
 block_parameter
     =
     | block_parameter_key_value
-- 
2.47.3