[antlr-interest] Re: SL_COMMENT in java.g

[Terence Parr]

On Monday, October 20, 2003, at 12:45 PM, Matt Benson wrote:

> I get:
>
> java.g:1099:22: warning:Being nongreedy only makes
> sense for (...)+ and (...)*
> java.g:1099: warning:lexical nondeterminism upon
> java.g:1099:     k==1:'\n','\r'
> java.g:1099:     k==2:'\n'
> java.g:1099:     k==3:<end-of-token>
> java.g:1099:     k==4:<end-of-token>
> java.g:1099:     between alt 1 and exit branch of
> block
>

yeah, ooops... put a * on the overall

: "//" ( options {greedy=false;} : . )* ... ;

see if that works.

Ter

> -Matt
>
> :(
>
> --- Terence Parr <parrt at cs.usfca.edu> wrote:
>> Will
>>
>> SL_COMMENT
>> 	:	"//" ( options {greedy=false;} : (.)* )
>> ('\n'|'\r' ('\n')?)
>> 	;
>>
>> work?
>>
>> Ter
>>
>> On Monday, October 20, 2003, at 01:20 AM, rodrigo
>> reyes wrote:
>>
>>> Hi Terence,
>>>
>>>> On Friday, October 17, 2003, at 05:15 AM, rodrigo
>> reyes wrote:
>>>>> SL_COMMENT
>>>>> 	:	"//"
>>>>> 		(~('\n'|'\r')
>>>>>                 {
>>>>>                      if (LA(1) == EOF_CHAR)
>>>>>                             break;
>>>>>                 }
>>>>>            )*
>>>>> 	;
>>>>
>>>> Hi guys...i'm not sure I like the "break" in
>> there as it is
>>>> not part of
>>>> the grammar analysis; or rather it can screw you
>> up.
>>>> Hmm...i'll take a  peek.
>>>
>>>  I don't like it either, as it refers to something
>> out of the grammar,
>>> that's why I am looking for an alternative
>> solution.
>>>
>>>  However, I have plenty of files with ending
>> SL_COMMENT which are not
>>> matched by the current grammar. So I need at least
>> a temporary
>>> solution.
>>>
>>>  If you have any advice on how to fix it properly,
>> I'll gladly take it
>>> ;-)
>>>
>>> Bests,
>>> Rodrigo
>>>
>>>
>>>
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>>>
>>>
>> --
>> Professor Comp. Sci., University of San Francisco
>> Creator, ANTLR Parser Generator,
>> http://www.antlr.org
>> Co-founder, http://www.jguru.com
>> Co-founder, http://www.knowspam.net enjoy email
>> again!
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>> sharing
>>
>>
>>
>>
>>
>>
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>> http://docs.yahoo.com/info/terms/
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>>
>
>
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--
Professor Comp. Sci., University of San Francisco
Creator, ANTLR Parser Generator, http://www.antlr.org
Co-founder, http://www.jguru.com
Co-founder, http://www.knowspam.net enjoy email again!
Co-founder, http://www.peerscope.com pure link sharing




 

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