1 s ::= Grammar ws => "gram"
2 ws !::= w** | w** "//" (~[\n]*) "\n" ws
4 Grammar ::= r +/ ws => "grammar"
6 r ::= word ^"::=" alternatives /ws
7 | word ^"!::=" alternatives /ws
9 alternatives ::= (Conjuncts +/ (ws "|" ws)) +/ (ws ">" ws)
11 Conjuncts ::= Sequence
12 | Sequence ^"&" e*/ws /ws
13 | Sequence ^"&~" e*/ws /ws
16 | (e+/ws ws)? "^" Quoted (ws e+/ws)? => "ps2"
20 | e "<-" psy /ws => "psyl"
21 | psy "->" e /ws => "psyr"
22 | e "<-" psy "->" e /ws => "psylr"
23 Sequence ::= Quoted => "qprod"
26 | psx ^"=>" (word|Quoted) /ws
31 Range ::= ec => "range"
34 e ::= word => "nonTerminal"
37 | ^"{" Sequence "}" /ws
40 | (e ^"++" /ws > e ^"+" /ws)
41 | (e ^"++/" e /ws > e ^"+/" e /ws)
42 | (e ^"**" /ws > e ^"*" /ws)
43 | (e ^"**/" e /ws > e ^"*/" e /ws)
47 > ^"(" alternatives ")" /ws
53 word ::= [a-zA-Z0-9_]++
54 Quoted ::= "\"" ((~[\"\\] | escaped)+) "\""
56 escaped ::= "\\n" => "\n"