[il-antlr-interest: 31235] [antlr-interest] Use of multimap in grammar file.
Hello.
I am trying to make a not too complicated translator using ANTLR, the
aproach I'm taking makes use of Multimaps in the grammar file.
However I'm having some trouble initializing them, here's how I do it:
grammar FSM;
options {output=template;}
@header {
import org.antlr.stringtemplate.*;
import org.antlr.misc.MultiMap;
}
model
scope{
Multimap Integer, String CMap;
Multimap Integer, String UMap;
}
@init {
$model::UMap = HashMultimap.create();
$model::CMap = HashMultimap.create();
}
: RULES
- RewriteRule
;
...
When I try to debug that in ANTLWorks, or try to build project in NetBeans I
get the following error:
error(104): cannot find an attribute name in attribute declaration
java.lang.StringIndexOutOfBoundsException: String index out of range: -1
Which seems to be a problem with the angled brackets or something. Because
If I comment out /*Multimap Integer, String CMap*/ the error goes away.
What would be a correct way to initialize a Multimap visible to that scope?
For your time, thank you.
- APJ
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[il-antlr-interest: 31236] Re: [antlr-interest] Use of multimap in grammar file.
Nevermind that previous post (accidentally doubled btw). My mind after many
hours couldn't see an extra ; that was there which caused the error.
Now I have a different quesiton if you mind.
I have some expression like this:
TRANSITION IDENTIFIER TO IDENTIFIER transFlags
Now what I want in this step is store IDENTIFIER.text from the left side and
IDENTIFIER.text from the right side, but how can I tell one from the other?
Tried something like this:
TRANSITION IDENTIFIER {Auxiliar = {$IDENTIFIER.text}} TO IDENTIFIER
transFlags
Auxiliar beign a String but I get the error: IDENTIFIER is a non-unique
reference.
I can't define some sort of LeftIdentifier because it's the same rule and
it won't be matched.
Any idea how can I differenciate these Identifiers?
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[il-antlr-interest: 31237] Re: [antlr-interest] Use of multimap in grammar file.
rule: TRANSITION id1=IDENTIFIER TO id2=IDENTIFIER transFlags
Then you can use id1 and id2 as references to their respective tokens in the
post-rule code block.
-Original Message-
From: antlr-interest-boun...@antlr.org [mailto:antlr-interest-
boun...@antlr.org] On Behalf Of Alfredo Perez J.
Sent: Wednesday, January 26, 2011 12:41 PM
To: antlr-interest@antlr.org
Subject: Re: [antlr-interest] Use of multimap in grammar file.
Nevermind that previous post (accidentally doubled btw). My mind after
many
hours couldn't see an extra ; that was there which caused the error.
Now I have a different quesiton if you mind.
I have some expression like this:
TRANSITION IDENTIFIER TO IDENTIFIER transFlags
Now what I want in this step is store IDENTIFIER.text from the left
side and
IDENTIFIER.text from the right side, but how can I tell one from the
other?
Tried something like this:
TRANSITION IDENTIFIER {Auxiliar = {$IDENTIFIER.text}} TO IDENTIFIER
transFlags
Auxiliar beign a String but I get the error: IDENTIFIER is a non-unique
reference.
I can't define some sort of LeftIdentifier because it's the same rule
and
it won't be matched.
Any idea how can I differenciate these Identifiers?
List: http://www.antlr.org/mailman/listinfo/antlr-interest
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email-address
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[il-antlr-interest: 31238] [antlr-interest] Many unused variables in the generated parser c file
Hi,
Any suggestions as to how I can prevent unused variable declarations within
the generated parser c file ?
Thanks,
-Sunil Sawkar
Following is an example warning from compiler, and the related source in the c
file:
compiler warning:
algoexprParser.c:5462: warning: unused variable ‘LA2_2’
algoexprParser.c:5476: warning: unused variable ‘LA2_3’
source:
for (;;)
{
int alt2=2;
switch ( LA(1) )
{
case VARIABLE:
case LABEL_NOT_VAR:
{
{
/*
dfaLoopbackState(k,edges,eotPredictsAlt,description,stateNumber,semPredState)
*/
int LA2_2 = LA(2);
if ( (synpred2_algoexpr(ctx)) )
{
alt2=1;
}
}
}
break;
case 72:
{
{
/*
dfaLoopbackState(k,edges,eotPredictsAlt,description,stateNumber,semPredState)
*/
int LA2_3 = LA(2);
if ( (synpred2_algoexpr(ctx)) )
{
alt2=1;
}
}
}
break;
.
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[il-antlr-interest: 31240] [antlr-interest] org.antlr.runtime.CommonToken cannot be cast to org.antlr.runtime.tree.Tree
Can anyone tell me why I got this exception? My output is AST. Thanks. List: http://www.antlr.org/mailman/listinfo/antlr-interest Unsubscribe: http://www.antlr.org/mailman/options/antlr-interest/your-email-address -- You received this message because you are subscribed to the Google Groups il-antlr-interest group. To post to this group, send email to il-antlr-inter...@googlegroups.com. To unsubscribe from this group, send email to il-antlr-interest+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/il-antlr-interest?hl=en.
[il-antlr-interest: 31241] Re: [antlr-interest] org.antlr.runtime.CommonToken cannot be cast to org.antlr.runtime.tree.Tree
On Wed, Jan 26, 2011 at 10:40 PM, Ching zchin...@gmail.com wrote: Can anyone tell me why I got this exception? My output is AST. Thanks. Err, that error is pretty self-explanatory: you're trying to cast a org.antlr.runtime.CommonToken to a org.antlr.runtime.tree.Tree, which is illegal. As you can see from ANTLR's class hierarchy: http://www.antlr.org/api/Java/hierarchy.html the two can't be cast (either CommonToken-Tree or Tree-CommonToken). Perhaps you don't understand where this happens in your grammar? In that case, please show your grammar as well. Regards, Bart. List: http://www.antlr.org/mailman/listinfo/antlr-interest Unsubscribe: http://www.antlr.org/mailman/options/antlr-interest/your-email-address -- You received this message because you are subscribed to the Google Groups il-antlr-interest group. To post to this group, send email to il-antlr-inter...@googlegroups.com. To unsubscribe from this group, send email to il-antlr-interest+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/il-antlr-interest?hl=en.
[il-antlr-interest: 31242] Re: [antlr-interest] org.antlr.runtime.CommonToken cannot be cast to org.antlr.runtime.tree.Tree
You might need to introduce the Tree adaptor if you're using the custom type of tree nodes. It's described here: http://www.antlr.org/wiki/display/ANTLR3/Tree+construction On Thu, Jan 27, 2011 at 8:57 AM, Bart Kiers bki...@gmail.com wrote: On Wed, Jan 26, 2011 at 10:40 PM, Ching zchin...@gmail.com wrote: Can anyone tell me why I got this exception? My output is AST. Thanks. Err, that error is pretty self-explanatory: you're trying to cast a org.antlr.runtime.CommonToken to a org.antlr.runtime.tree.Tree, which is illegal. As you can see from ANTLR's class hierarchy: http://www.antlr.org/api/Java/hierarchy.html the two can't be cast (either CommonToken-Tree or Tree-CommonToken). Perhaps you don't understand where this happens in your grammar? In that case, please show your grammar as well. Regards, Bart. List: http://www.antlr.org/mailman/listinfo/antlr-interest Unsubscribe: http://www.antlr.org/mailman/options/antlr-interest/your-email-address -- Piotr Kaleta List: http://www.antlr.org/mailman/listinfo/antlr-interest Unsubscribe: http://www.antlr.org/mailman/options/antlr-interest/your-email-address -- You received this message because you are subscribed to the Google Groups il-antlr-interest group. To post to this group, send email to il-antlr-inter...@googlegroups.com. To unsubscribe from this group, send email to il-antlr-interest+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/il-antlr-interest?hl=en.
[il-antlr-interest: 31243] [antlr-interest] best practice for unwanted input before EOF
Hi folks,
I have a grammar with the following start rule...
prog: (init_block)? statement+ EOF ;
The purpose of the EOF token is to detect unwanted input after
statements. I'm unclear on the best way to respond to input that is
unwanted but, because it is defined in the grammar, does not provoke a
NoViableAlt exception such as an init_block following rather than
preceding the statements.
At the moment I'm doing this in the @members section of my grammar...
@Override
protected Object recoverFromMismatchedToken(IntStream input, int
ttype, BitSet follow) throws RecognitionException {
if (ttype == Token.EOF) {
throw new UnexpectedInputException(Invalid input before end of file);
}
return super.recoverFromMismatchedToken(input, ttype, follow);
}
It works, but it seems like a clunky solution.
I've searched the list archives and scanned the Definitive Reference
and Patterns books without success, although I suspect I must be
missing something obvious.
I'd be grateful for any examples or pointers to docs.
Michael
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[il-antlr-interest: 31244] [antlr-interest] Set line/col of synthetic token from non-token
Folks, I have this production formula : outer_formula nle? - ^(STMT[???,STMT] ; where STMT is a synthetic token. Question is how to pass info for line/col from whatever matches 'outer_formula' to where the STMT synthetic token is created in adaptor.create(...). I get a tree for outer_formula, not a token. I know how to do this with tokens. Any help appreciated. .bill List: http://www.antlr.org/mailman/listinfo/antlr-interest Unsubscribe: http://www.antlr.org/mailman/options/antlr-interest/your-email-address -- You received this message because you are subscribed to the Google Groups il-antlr-interest group. To post to this group, send email to il-antlr-inter...@googlegroups.com. To unsubscribe from this group, send email to il-antlr-interest+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/il-antlr-interest?hl=en.
