alternatives ::= equiAlt $$ (ws ">" ws)
equiAlt ::= conjuncts $$ (ws "|" ws) => "alternatives"
-sequence ::= Es
- > Es ^"/" e /ws
-Es ::= e+
-es ::= e %% ws
+sequence ::= es
+ > es ws ^"/" e
+Es ::= e %% (w**)
+es ::= e %% (w**)
ss ::= es | es ^"/" e /ws
e ::= word => "nonTerminalY"
| [(][)] => "epsilon"
| ^"{" alternatives "}" /ws
- | "[" ranges "]" => "range"
- | "[~" ranges "]" => "rangex"
+ | "[" (range*) "]" => "range"
+ | "[~" (range*) "]" => "rangex"
| e ^"%%" e /ws
| e ^"$$" e /ws
| e ^"?" /ws
| "(" word ^")" /ws
> ^"(" alternatives ")" /ws
-ranges ::= range*
-
w !::= " "
- | "//" [~\n]* "\n"
+ | "//" ([~\n]*) "\n"
| "\n"
| "\r"
an ::= [a-zA-Z0-9_]
word ::= an++ => "sify"
-quoted ::= "\"" ([~\"\\] | escaped)* "\"" => "sify"
+quoted ::= "\"" (([~\"\\] | escaped)*) "\"" => "sify"
escaped ::= "\\n" => "\n"
| "\\r" => "\r"
| "\\" [~nr]