- | rewrite ^"&" sequence /ws
- | rewrite ^"&~" sequence /ws
-
-rewrite ::= sequence /ws => "rewrite"
- | sequence ^"=>" word /ws
- | sequence ^"=>" quoted /ws
- | sequence "=>" "()" /ws => "wrap"
-
-range ::= ec => "range0" | ec ^"-" ec => "range0"
-E ::= word => "nonTerminalY"
- | [(][)] => "epsilon"
- | ^"{" alternatives "}"
- | "[" [\~]? range* "]" => "range"
- | E ^"*/" E
- | E ^"+/" E
- | E ^"?"
- | E ^"~/~"
-
- | E ^"-" E
-
- | ^"!" E
- | "^" quoted => "care"
- | ^"`" E
- | E ^"#"
- | quoted => "literal"
+ | rewrite ^"&" e*/ws /ws
+ | rewrite ^"&~" e*/ws /ws
+
+sequence ::= e*/ws (ws "/" e)? => "seq"
+
+rewrite ::= sequence /ws => "rewrite"
+ | sequence ^"=>" (word|quoted) /ws
+
+ec ::= [~\-\]\\\~]
+ | escaped