1 s ::= Grammar ws => "gram"
2 Grammar ::= NonTerminal +/ ws => "grammar"
3 NonTerminal ::= word ^"::=" RHS /ws
5 RHS ::= (Conjuncts +/ (!ws "|" !ws)) +/ (!ws ">" !ws)
8 | Sequence ^"&" Elements /ws
9 | Sequence ^"&~" Elements /ws
12 ps ::= Elements => "ps"
13 | (e+/ws !ws)? ^"^" Quoted (!ws e+/ws)?
18 Sequence ::= Quoted => "qprod"
21 | psx ^"=>" ("()"|word|Quoted) /ws
26 Range ::= ec => "range"
29 e ::= word => "nonTerminal"
32 | ^"{" Sequence "}" /ws
50 word ::= [a-zA-Z0-9_]++
51 Quoted ::= "\"" ((~[\"\\] | escaped)+) "\""
53 escaped ::= "\\n" => "\n"
58 w ::= " " | "\n" | "\r"
60 | w** "//" ~[\n]* "\n" ws => ()