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"
25 | psx ^"=>" (word|quoted) /ws
30 range ::= ec => "range"
33 e ::= word => "nonTerminal"
36 | ^"{" sequence "}" /ws
39 | (e ^"++" /ws > e ^"+" /ws)
40 | (e ^"++/" e /ws > e ^"+/" e /ws)
41 | (e ^"**" /ws > e ^"*" /ws)
42 | (e ^"**/" e /ws > e ^"*/" e /ws)
46 > ^"(" alternatives ")" /ws
52 word ::= [a-zA-Z0-9_]++
53 quoted ::= "\"" ((~[\"\\] | escaped)+) "\""
55 escaped ::= "\\n" => "\n"