Support filters being call chained

Previously filters were not treated the same as variable, as a
result it was not possible to call the result of a filter. Since
filters are treated as regular variable and therefore can be called
any number of times, this change was necessary to allow them to be
parsed the same way.

diff --git a/grammar.ebnf b/grammar.ebnf
index 1939e5e0b4764842260e00af1f016751a25564eb..34b8897f27306f431d5b24c842a3d904f77c6630 100644 (file)
--- a/grammar.ebnf
+++ b/grammar.ebnf
@@ -334,13 +334,8 @@ variable_filter
     "|" {SP}* @:filter\r
     ;\r
 filter =\r
-    name:IDENTIFIER\r
-    [arguments:filter_parameters]\r
-    ;\r
-\r
-filter_parameters\r
-    =\r
-    "(" @:variable_accessor_call_parameters ")"\r
+    variable:IDENTIFIER\r
+    accessors:{ variable_accessor_call }*\r
     ;\r
 \r
 comment_expression\r