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"
15 ss ::= es | es ^"/" e /ws
18 | rewrite ^"&" e%%ws /ws
19 | rewrite ^"&~" e%%ws /ws
21 rewrite ::= sequence /ws => "rewrite"
22 | sequence ^"=>" word /ws
23 | sequence ^"=>" quoted /ws
24 | sequence "=>" "()" /ws => "wrap"
29 range ::= ec => "range0"
30 | ec ^"-" ec => "range1"
32 e ::= word => "nonTerminalY"
34 | ^"{" alternatives "}" /ws
35 | "[" ranges "]" => "range"
36 | "[~" ranges "]" => "rangex"
45 | "^" quoted /ws => "care"
50 | (e ws ^"**" > e ws ^"*")
51 | (e ws ^"++" > e ws ^"+")
54 > ^"(" alternatives ")" /ws
63 word ::= an++ => "sify"
64 quoted ::= "\"" ([~\"\\] | escaped)* "\"" => "sify"
65 escaped ::= "\\n" => "\n"