1 s ::= ws grammar ws => "gram"
3 grammar ::= r+/ws => "grammar"
4 r ::= word ^"::=" alternatives /ws
5 | word ^"!::=" alternatives /ws
7 ec ::= [~\]\\\-\~] | escaped
9 alternatives ::= equiAlt +/ (ws ">" ws)
10 equiAlt ::= conjuncts +/ (ws "|" ws) => "alternatives"
18 | rewrite ^"&" sequence /ws
19 | rewrite ^"&~" sequence /ws
21 rewrite ::= sequence /ws => "rewrite"
22 | sequence ^"=>" word /ws
23 | sequence ^"=>" quoted /ws
24 | sequence "=>" "()" /ws => "wrap"
26 range ::= ec => "range0" | ec ^"-" ec => "range0"
27 e ::= word => "nonTerminalY"
29 | ^"{" alternatives "}" /ws
30 | "[" [\~]? range* "]" => "range"
39 | "^" quoted /ws => "care"
44 | (e ws ^"**" > e ws ^"*")
45 | (e ws ^"++" > e ws ^"+")
48 > ^"(" alternatives ")" /ws
55 word ::= an++ => "sify"
56 quoted ::= "\"" ([~\"\\] | escaped)* "\"" => "sify"
57 escaped ::= "\\n" => "\n"