[antlr-interest] Re: Help me please to improve lexer
Andrew Voelker
avoelker at yahoo.com
Thu Dec 5 17:22:59 PST 2002
Try the following:
START options { ignore WS; } :
("aaa" "bbb" "ccc" | "ddd" "eee" | "fff" XXX | YYY) { do(); };
XXX options { ignore WS; } :
("iii" "jjj" | "kkk"} { do(); };
YYY options { ignore WS; } :
("lll" "mmmm" | "nnnn") { do(); };
-avoelker
> -----Original Message-----
> From: alekseyandreev [mailto:andreev at q...]
> Sent: Thursday, December 05, 2002 1:30 AM
> To: antlr-interest at y...
> Subject: [antlr-interest] Help me please to improve lexer
>
>
> My lexer grammar looks like this:
>
> START options { ignore WS; }
> : "aaa"{do();} "bbb"{do();} "ccc"{do();}
> | "ddd"{do();} "eee"{do();}
> | "fff"{do();} XXX {do();}
> | YYY {do();}
> ;
> XXX options { ignore WS; }
> : "iii"{do();} "jjj"{do();}
> | "kkk"{do();}
> ;
> YYY options { ignore WS; }
> : "lll"{do();} "mmm"{do();}
> | "nnn"{do();}
> ;
>
> Is there any opportunity to remove actions {do();}
> after every element and have analogue behavior?
>
> Aleksey
>
>
>
>
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