[antlr-interest] Could you advise me ?

[Lloyd Dupont]

> 1 ) In my code I use ( 'a'..'z' | 'A'..'Z' ) to refer to all of the
> letters from a - z. Is there any way to add something that will make
> it accept anything (eg all puntuation,etc) without having to define
> every item ?
.  (one dot, not '.' which is a dot character)

but never use (.)* it will consume all your file...
instead use ~('\r\|'\n\), which mean anything but '\r' or '\n' character

> No parameters : <dodar>
> Parameters (Quotes) : <dodar Param1="value" Param2="Value">
> Parameters (No Quotes) : <dodar Param1=value Param2=Value>
did you try sometjing like (I am not a guru, just assuming)

TAG: '<' TAGNAME PARAM* '>';
TAGNAME: "dodar"
    | "coucou"
    | "foo"
    | "bar"
    | "toto"
    ;
PARAM: IDENT '=' VALUE;

... to be continued ...

> How can I describe this using Antlr ?
like above...

> 3) An item must have a start tag but the end tag is optional. Eg
> either <dodar> or <dodar></dodar> is acceptable. How can I describe
> this using Antlr ?
any optional rule is stated with ?, (did you look the doc or, at last, the
examples ?)

for instance:
TAG:  '<' TAGNAME PARAM* '>'; TAGBODY ("</" TAGNAME ">")?;

or even better:
TAG:  '<' t1:TAGNAME PARAM* '>'; TAGBODY
    ("</" t2:TAGNAME { t1.getText().equals(t2.getText()); }? ">")?;

> I would be grateful for any advice you can offer.
thanks, you're wellcome.

> Thanks in advance
you too good :-)

> John Clarke
Lloyd Dupont
painfully learning ANTLR fellow user


 

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