[antlr-interest] Newbie trying to tame lexer

[Bart Kiers]

Try something like this:

BLOCK_COMMENT
 : '/*' ({input.LA(1) != '*' && input.LA(2) != '/'}?=> . )*
   ( '*/'
   | EOF {System.err.println("Oi, wrong BLOCK_COMMENT!");}
   )
 ;


Note that the predicate, `{input.LA(1) != '*' && input.LA(2) != '/'}?=>`,
contains target-specific code (Java, in my example).

Regards,

Bart.


On Sat, Aug 4, 2012 at 10:34 PM, <forumer at smartmobili.com> wrote:

> Le 04.08.2012 20:20, Bart Kiers a écrit :
>
>> Hi forumer,
>>
>> Youd normally create a single rule for a block comment, like this:
>>
>> BLOCK_COMMENT
>>  : /* .* */
>>  ;
>>
>>  Yes I know but I need a parser that can accept invalid multiline
> comments, ex
>
> /*
> * I am an invalid multiline comment
>
> With the traditional approach I will get a match exception and I don't
> want that.
> So is it possible ?
>
>
>
>