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You received this message beca
Order doesn't matter. ANTLR will match the longest possible token.
One case when order matters is when the rule below cannot match any
token inspite of the 'lengthiest token matching' mechanism.
Example:
ID : 'a'..''z'+ ;
SOME_KEYWORD : 'key' ;
In this case ANTLR will report an err
I did not have much luck with this btw (the suggested solution exhibited the
same problem).
I went back and structured my grammar closer to the C example grammar
provided with ANTLR (as far as assignment expressions go). However, that
example unfortunately uses global backtracking. I was able to
thanks.
org.antlr.Tool is happy with these two, regardless of which one is
above/below the other.
But, won't the DFA's care about the order???
DQUOTE : '"' ;
DQUOTE_STRING : DQUOTE ( ~('"') )* DQUOTE
- Original Message -
From: "Gavin Lambert"
To: "Avid Trober" ;
Sent: Tuesday, Apr
I pretty much gave up looking for a solution. I still have the
standalone test harness, and I comment out the system dependencies if
I need to see the parse tree or AST (increasingly rarely, as the
project matures).
- Dennis Brothers
On Apr 21, 2009, at 12:07 PM, Jacob Buys wrote:
>
Andreas, Jim,
Yes, this seems the right way to do it, since the actual "body data" are
pretty trivial!
I'll try working this the way you suggested!
Again, thanks for your replies!
Nikos
On Tue, Apr 21, 2009 at 4:11 PM, Jim Idle wrote:
> Nick Vlassopoulos wrote:
> > Hi Jim!
> >
> > Thanks for
Nick Vlassopoulos wrote:
> Hi Jim!
>
> Thanks for your replies!!
>
> The input lines are of the form
> "var = data"
> so they are pretty simple!
> If I got this right, you suggest using something like a
> body_set :
>body_start (probably a "greedy" option here?) body_end
> rule and then just a
No, in any case, you should avoid parsing the whole file! That would
basically mean loading the whole file into main memory. Either use a
lexer, a custom tokenizer or whatever for seperating your entries in the
body section. Then, for each line, you invoke the parser, possibly by
reusing the e
Hi Jim!
Thanks for your replies!!
The input lines are of the form
"var = data"
so they are pretty simple!
If I got this right, you suggest using something like a
body_set :
body_start (probably a "greedy" option here?) body_end
rule and then just add code to parse the intermediate lines (which
Sam Barnett-Cormack wrote:
> So, I have this rule:
>
> setting
>: (LCURL)=>settingLCURL
>| (LCID|externalValueReference)=>referencedValue
>| typeornull
>| value
>| object
>;
>
> And I'm getting warnings that multiple choices can match input such as
> LCID or LCURL. It's tr
This question in the antlr archives is the same one I have: "Is this now
the correct practice where a tree walker is to be invoked repeatedly ?"
http://www.antlr.org/pipermail/antlr-interest/2009-March/033823.html
The poster says that using BufferedTreeNodeStream instead of
CommonTreeNodeStream
So, I have this rule:
setting
: (LCURL)=>settingLCURL
| (LCID|externalValueReference)=>referencedValue
| typeornull
| value
| object
;
And I'm getting warnings that multiple choices can match input such as
LCID or LCURL. It's true that a lot of the options can match either, bu
Nick Vlassopoulos wrote:
> Hi Andreas,
>
> Thanks for your fast reply!
> So it should be something like a "line parser" that's instatiated for
> each line of the BODY section!
>
No - you don't want to do this really, you will create millions of
malloc/free calls - go with the custom input stream
Nick Vlassopoulos wrote:
> Hi,
>
> I am fairly new to ANTLR and I have come accross a problem.
> I have written a simple grammar to parse huge data files (several
> gigabytes each)
> and antlr seems to crash by running out of memory (I am using "C" as
> the target language).
>
> The data files h
Gavin Lambert wrote:
> At 17:08 21/04/2009, Christof Lutteroth wrote:
> >I am trying to get ANTRL 3.1.3 to generate a method that
> declares
> >an exception.
> >For example, I want rule compilationUnit (from the Java grammar
> in
> >the grammars section of the ANTLR website) to throw an
> E
Hi Andreas,
Thanks for your fast reply!
So it should be something like a "line parser" that's instatiated for each
line of the BODY section!
Thanks again!
Nikos
On Tue, Apr 21, 2009 at 2:22 PM, Andreas Meyer
wrote:
> I do not remember something built-in, so I guess the easiest solution
> would
I do not remember something built-in, so I guess the easiest solution
would be to create a lexer for the HEADER/DECL/BODY/line/END tokens, and
from within the lexer, instantiate/call a new lexer/parser.
Best,
Andreas Meyer
smartShift
smart e*lliance GmbH
Willy-Brandt Platz 6
68161 Mannheim
Ger
Hi,
I am fairly new to ANTLR and I have come accross a problem.
I have written a simple grammar to parse huge data files (several gigabytes
each)
and antlr seems to crash by running out of memory (I am using "C" as the
target language).
The data files have the general format:
HEADER
DECL
BODY
At 17:08 21/04/2009, Christof Lutteroth wrote:
>I am trying to get ANTRL 3.1.3 to generate a method that
declares
>an exception.
>For example, I want rule compilationUnit (from the Java grammar
in
>the grammars section of the ANTLR website) to throw an
Exception:
>
>compilationUnit throw
At 21:59 21/04/2009, Avid Trober wrote:
>I'm parsing a 7-bit ASCII stream ... 2 questions
>
>Question 1: can't I just fall-thru wrt to lexer rules, where
>lexer rules are specific-to-general, and avoid indeterminisms at
>run-time?
[...]
>... // (AND IF NOTHING ABOVE MATCHES, AT LEAST WE'RE MATCH
Hi All
I have the below lines of code in my source, but while I try instrument the
source, it throws error
1:debug_error((char *)("ConnectIntPstn : NewAccessModem failure: "), 1,
(long)(modem_status), (long)(0));
It gives error
[ unexpected token: , ]
2: if __ctype_b))[(int) ((TRECK_BYTE
I'm parsing a 7-bit ASCII stream ... 2 questions
Question 1: can't I just fall-thru wrt to lexer rules, where lexer rules are
specific-to-general, and avoid indeterminisms at run-time?
For example:
NULL: '\u'
;
SOH: '\u0001'
;
... // (EACH CONTROL CHARCTER HAS ITS OWN LEXER RUL
Another alternative you could do is not use source code instrumentation,
but bytecode instrumentation ;-)
To do that look at the ASM toolkit.
Andreas Meyer schrieb:
> It seems you are using ANTLR2. There, hidden tokens were handled
> differently from ANTLR3 (see http://www.antlr2.org/doc/stream
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