d-t-w · June 27, 2019 02:04
diff --git a/parse-grammar.ebnf b/parse-grammar.ebnf
 <S>                   = template

 <FWS>                 = #'[ \t\r\n]*'

 when                  = <'~='> #'[a-zA-Z0-9\-]+'
 when-not              = <'~!'> #'[a-zA-Z0-9\-]+'
 repeated              = <'~*'>

 text                  = #'[^~]*'
 variable              = <'~$'> #'[a-zA-Z0-9\-]+'

 metadata              = (when | when-not | repeated | <FWS>)* <FWS> <":">
 script                = (variable | text)*

 <template>            = [metadata] <FWS> script
	<S> = template

	<FWS> = #'[ \t\r\n]*'

	when = <'~='> #'[a-zA-Z0-9\-]+'
	when-not = <'~!'> #'[a-zA-Z0-9\-]+'
	repeated = <'~*'>

	text = #'[^~]*'
	variable = <'~$'> #'[a-zA-Z0-9\-]+'

	metadata = (when \| when-not \| repeated \| <FWS>)* <FWS> <":">
	script = (variable \| text)*

	<template> = [metadata] <FWS> script