1 s ::= ws grammar ws => "gram"
3 grammar ::= r $$ ws => "grammar"
4 r ::= word ^"::=" alternatives /ws
5 | word ^"!::=" alternatives /ws
7 alternatives ::= equiAlt $$ (ws ">" ws)
8 equiAlt ::= conjuncts $$ (ws "|" ws) => "alternatives"
18 | rewrite ^"&~" es /ws
20 rewrite ::= sequence /ws => "rewrite"
21 | sequence ^"=>" word /ws
22 | sequence ^"=>" quoted /ws
23 | sequence "=>" "()" /ws => "wrap"
28 range ::= ec => "range0"
29 | ec ^"-" ec => "range1"
31 e ::= word => "nonTerminalY"
33 | ^"{" alternatives "}" /ws
34 | "[" ranges "]" => "range"
35 | "[~" ranges "]" => "rangex"
44 | "^" quoted /ws => "care"
49 | (e ws ^"**" > e ws ^"*")
50 | (e ws ^"++" > e ws ^"+")
53 > ^"(" alternatives ")" /ws
62 word ::= an++ => "sify"
63 quoted ::= "\"" ([~\"\\] | escaped)* "\"" => "sify"
64 escaped ::= "\\n" => "\n"