[antlr-interest] Re: treeparser to copy input to output

[Terence Parr]

On Feb 3, 2004, at 4:46 AM, SainTiss wrote:

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> Hi,
>
> Ah, of course... sounds logical actually :-)
>
> Thanks...
>
> One more thing though: I don't really need the tree parser anymore 
> now, so I
> thought I'd disable "buildAST" in java.g. However, antlr complains it 
> doesn't
> know AST-specific variables such as #p, which are used inside actions. 
> Is
> there a way to turn off AST building without having to remove all 
> related
> actions?
> Or is there no overhead at all if the getAST() method isn't called?

Hmm...i'm not sure what would happen.  YOu might wanna remove the 
actions.  Not that expensive if it doesn't crash ;)

Ter

>
> Thanks,
>
> Hans
>
> On Tuesday 03 February 2004 02:13, Terence Parr wrote:
>> Hi.  You need to remove the SKIP part, but tell the rewrite engine to
>> discard (it actually just prevents the parser from seeing it).
>>
>> Ter
>>
>> On Feb 2, 2004, at 3:37 PM, SainTiss wrote:
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>>> Hmm...
>>>
>>> I get the impression that changing the token from SKIP to something
>>> else isn't
>>> that straightforward...
>>> I added a token to the "tokens{}" section, and then changed
>>> setType(Token.SKIP) to setType(<new token>), but the parser doesn't
>>> seem to
>>> recognize java anymore...
>>> Is there something I'm missing here?
>>>
>>> Thanks,
>>>
>>> Hans
>>>
>>> On Monday 02 February 2004 23:29, Terence Parr wrote:
>>>> Ah.  Yeah, the WS cannot be SKIP or else the rewrite engine won't 
>>>> see
>>>> the token...
>>>>
>>>> Ter
>>>>
>>>> On Feb 2, 2004, at 1:16 PM, SainTiss wrote:
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>>>>> Hi,
>>>>>
>>>>> Thanks for that article... It's certainly going in the right
>>>>> direction, except
>>>>> I can't get the engine to remember whitespace.
>>>>> I did remove the rewriteEngine.discard(MyLexer.WS) call though...
>>>>> I'm using the java.g grammar. Could the problem be that the lexer
>>>>> assigns the
>>>>> token "SKIP" to whitespace?
>>>>>
>>>>> Thanks,
>>>>>
>>>>> Hans
>>>>>
>>>>> On Monday 02 February 2004 21:06, parrt2000 wrote:
>>>>>> Howdy...yahoooooooo again snarfed my earlier reply...ugh.
>>>>>>
>>>>>> Anyway, have you seen:
>>>>>>
>>>>>> http://www.antlr.org/article/rewrite.engine/index.tml
>>>>>>
>>>>>> ?
>>>>>>
>>>>>> Terence
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>> Yahoo! Groups Links
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>>>>>
>>>>> - --
>>>>> Ark Linux - Linux for the Masses (http://arklinux.org)
>>>>>
>>>>> Capitalism:
>>>>> You don't have any cows. The bank will not lend you money to buy
>>>>> cows,
>>>>> because you don't have any cows to put up as collateral.
>>>>>
>>>>> Representative Democracy:
>>>>> You have two cows. Your neighbors pick someone to tell you who gets
>>>>> the milk.
>>>>>
>>>>> In a world without walls and fences, who needs windows and gates?
>>>>>
>>>>> Hans Schippers
>>>>> 2LIC INF
>>>>> UA 2003-2004
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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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>>>
>>> - --
>>> Ark Linux - Linux for the Masses (http://arklinux.org)
>>>
>>> Capitalism:
>>> You don't have any cows. The bank will not lend you money to buy 
>>> cows,
>>> because you don't have any cows to put up as collateral.
>>>
>>> Representative Democracy:
>>> You have two cows. Your neighbors pick someone to tell you who gets
>>> the milk.
>>>
>>> In a world without walls and fences, who needs windows and gates?
>>>
>>> Hans Schippers
>>> 2LIC INF
>>> UA 2003-2004
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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
>>
>>
>>
>>
>>
>>
>> Yahoo! Groups Links
>>
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>
> - --
> Ark Linux - Linux for the Masses (http://arklinux.org)
>
> Capitalism:
> You don't have any cows. The bank will not lend you money to buy cows,
> because you don't have any cows to put up as collateral.
>
> Representative Democracy:
> You have two cows. Your neighbors pick someone to tell you who gets 
> the milk.
>
> In a world without walls and fences, who needs windows and gates?
>
> Hans Schippers
> 2LIC INF
> UA 2003-2004
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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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