From 3c3cd4673ec7c816125c5a14d2981ce7d28c0491 Mon Sep 17 00:00:00 2001
From: Robin Munn <rmunn@pobox.com>
Date: Tue, 15 Dec 2020 02:18:51 +0700
Subject: [PATCH] Railroad diagram for filter expression now includes named
 prefixes (#5278)

---
 .../tiddlers/filters/syntax/Filter Expression.tid      |  4 ++--
 .../filters/syntax/Named Filter Run Prefix.tid         | 10 ++++++++++
 2 files changed, 12 insertions(+), 2 deletions(-)
 create mode 100644 editions/tw5.com/tiddlers/filters/syntax/Named Filter Run Prefix.tid

diff --git a/editions/tw5.com/tiddlers/filters/syntax/Filter Expression.tid b/editions/tw5.com/tiddlers/filters/syntax/Filter Expression.tid
index 0b3835373..577ff6181 100644
--- a/editions/tw5.com/tiddlers/filters/syntax/Filter Expression.tid	
+++ b/editions/tw5.com/tiddlers/filters/syntax/Filter Expression.tid	
@@ -1,5 +1,5 @@
 created: 20150124182421000
-modified: 20201208185257875
+modified: 20201214053032397
 tags: [[Filter Syntax]]
 title: Filter Expression
 type: text/vnd.tiddlywiki
@@ -7,7 +7,7 @@ type: text/vnd.tiddlywiki
 <$railroad text="""
 [{:
   [: [[whitespace|"Filter Whitespace"]] ]
-  ("+"|"~"|:-|"-"|"=")
+  ("+"|"~"|:-|"-"|"="|":"[[named-prefix|"Named Filter Run Prefix"]])
   [[run|"Filter Run"]]
 }]
 """/>
diff --git a/editions/tw5.com/tiddlers/filters/syntax/Named Filter Run Prefix.tid b/editions/tw5.com/tiddlers/filters/syntax/Named Filter Run Prefix.tid
new file mode 100644
index 000000000..2ffedd21c
--- /dev/null
+++ b/editions/tw5.com/tiddlers/filters/syntax/Named Filter Run Prefix.tid	
@@ -0,0 +1,10 @@
+created: 20201214044413473
+modified: 20201214053018350
+tags: 
+title: Named Filter Run Prefix
+
+<$set name="prefixlist" filter="""[all[shadows+tiddlers]has[module-type]module-type[filterrunprefix]trim:prefix[$:/core/modules/filterrunprefixes/]trim:suffix[.js]addprefix["]addsuffix["]join[|]addprefix[(]addsuffix[)]]""">
+<$railroad text=<<prefixlist>>/>
+</$set>
+
+A named filter run prefix can precede any [[run|Filter Run]] of a [[filter expression|Filter Expression]] in place of a single-character prefix (`+`, `-` and so on). To create a new filter run prefix, create a [[Javascript module|Modules]] with a [[module-type|ModuleType]] of `filerrunprefix`.
\ No newline at end of file