1 s ::= Grammar ws => "gram"
5 ws !::= w** | w** "//" (~[\n]*) "\n" ws
7 Grammar ::= r +/ ws => "grammar"
9 r ::= word ^"::=" alternatives /ws
10 | word ^"!::=" alternatives /ws
12 alternatives ::= (Conjuncts +/ (ws "|" ws)) +/ (ws ">" ws)
14 Conjuncts ::= Sequence
15 | Sequence ^"&" e*/ws /ws
16 | Sequence ^"&~" e*/ws /ws
19 | (e+/ws ws)? "^" Quoted (ws e+/ws)? => "ps2"
23 // | e "<-" psy /ws => "psyl"
24 | psy "->" e /ws => "psyr"
25 // | e "<-" psy "->" e /ws => "psylr"
26 Sequence ::= Quoted => "qprod"
29 | psx ^"=>" (word|Quoted) /ws
34 Range ::= ec => "range"
37 e ::= word => "nonTerminal"
40 | ^"{" Sequence "}" /ws
43 | (e ^"++" /ws > e ^"+" /ws)
44 | (e ^"++/" e /ws > e ^"+/" e /ws)
45 | (e ^"**" /ws > e ^"*" /ws)
46 | (e ^"**/" e /ws > e ^"*/" e /ws)
51 > ^"(" alternatives ")" /ws
54 word ::= [a-zA-Z0-9_]++
55 Quoted ::= "\"" ((~[\"\\] | escaped)+) "\""
57 escaped ::= "\\n" => "\n"