I know this will be something stupid and obvious and trivial
And (sigh) it was...
The problem was not in the grammar, nor in how ANTLR processed it, but
in the way I was using the re-written AST.
As Douglas Adams said: you live and learn; at any rate you live...
Michael
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the original ID token type.
I know this will be something stupid and obvious and trivial but I
just can't spot it. Any tips would be much appreciated.
I'm using ANTLR 3.2, Java target.
cheers
Michael
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Hi Mark,
Just out of interest, are working with the units supported by Java
JSR-275 which I think are based on UCUM http://unitsofmeasure.org/ ?
Michael
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Many thanks Jim ! Using ANTLR in my maven projects has been a breeze
thanks to your efforts.
Michael
2009/11/6 Jim Idle j...@temporal-wave.com:
I note that the new Maven Archetype for building a starting project for
Maven and the Java target is now synced in the Maven central repository
Jim Idle wrote:
rules, I get Cannot display rule X because start state is not found
comment
: !(DIGIT | LETTER | SPACE)*
;
Remove the ! from this rule. Looks like you are trying to type a v2 grammar
into AntlrWorks, which is for v3 grammars, which is probably what you should
Working on a game project that involves a scripting language that I want to
interpret into a virtual
machine code that can be executed directly. I've included the grammar below.
All the lexer rules are
displaying properly in the syntax diagram, but when I click on the bodies of
any of the
Poked around at the language a bit and ran the debugger. Realizes that ! needed
to be encapsulated in 's
MPinnegar
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is not duplicated.
If have to do:
rule_x: NODE {
NodeData d = (NodeData)$NODE;
} - NODENodeData[d]
;
I thought the incoming data is copied in case of an empty rule (see
Tree construction during tree parsing in
http://www.antlr.org/wiki/display/ANTLR3/Tree+construction ) ??
cheers
Michael
Am Donnerstag, 8. Oktober 2009 16:54:01 schrieb michael:
I have a tree parser which output a new ast (tree rewriting).
The parser has attached some NodeData to some tree nodes, and one of my
tree rewrite rules should just copy this node, like:
sorry for the noise, it was of cause my bug
Hi Ivan,
Details and advanced draft are here:
http://www.pragprog.com/titles/tpdsl/language-implementation-patterns
Michael
2009/9/23 Ivan Yu Titov iti...@beeline.ru:
Hello,
I've recently heard about new ANTLR book. Is there any release date for it?
Thanks in advance.
With best wishes
Hi,
I can't get the system specific include built with configure on a
Solaris Unix system.
I downloaded the 3.1.3 source distribution. There wasn't a configure
script in the C runtime area but there was a configure.ac. So I ran
autoconf on it which generated a configure.
Running
Hi Bruce,
Just like this...
ANTLRNoCaseFileStream strm = new ANTLRNoCaseFileStream( myfilename );
MyLexer lexer = new MyLexer( strm );
That's all there is to it really. If only all things in life were so easy :)
Michael
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rules...
allthough Ihave not tried it...
cheers
Michael
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Thanks Tommy, this is a very good idea.
Michael
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Here's a fragment of the pom.xml that I use...
build
plugins
plugin
groupIdorg.antlr/groupId
artifactIdantlr3-maven-plugin/artifactId
version3.1.3-1/version
executions
execution
warnings, compiles
cleanly (in Java), and works?
Michael T. Gardner
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Hello Hugo,
Try this:
BufferedTreeNodeStream nodes = new BufferedTreeNodeStream(myTree);
LangWalker evaluator = new LangWalker(nodes);
for(int i = 0; i 1; i++)
evaluator.rule();
evaluator.reset();
end
Hope this helps,
Michael
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, but it works :-)
Michael
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nextToken call might be slightly costly.
I thought that too, but after profiling my app with the java interactive
profiler (jip) I saw that the cost for nextToken was under 0.02% compared to
the total runtime.
cheers
Michael
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and it gives an error:
lexer grammar C;
MLB : '/*' ( options { greedy = false; } : .* )
( '*/' | EOF { print error message } )
{ skip(); }
;
error(201): C.g:3:44: The following alternatives can never be matched: 1
with and without the EOF
Michael
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')* )? ; // to include a following
comment
or a semantic predicate which tests the column number
or maybe it's easier to use a file reader which just drops the lines
beginning with a ' :-)
cheers,
Michael
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, the biggest is in a packrat parser you have
ordered choises:
if in a rule e1 | e2 the first (e1) succeeds. the second is ignored. So
unlike normal BNF definitions you cannot simply switch the order of the
alternatives.
And you don't use a separate lexer, it's all in one grammar
Michael
List
'^;
--
I see.
Maybe one should find an example grammar which needs different lexers,
this is easy with an packrat grammar (since you have no lexer), but not so
with a normal lexer / parser combi.
cheers,
Michael
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: 'a'
if I use instead:
grammar P; // missing parser keyword
// rest the same
it works but generates a lexer.
cheers,
Michael
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Am Monday 08 June 2009 14:33:28 schrieb Sylvain, Gregory [USA]:
stmt :SUBJ_TOK COLON PHRASE+ NL+ ;
it works for me after adding EOF to the stmt rule:
stmt :SUBJ_TOK COLON PHRASE+ NL+ EOF;
Michael
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downloadable. I like this approach.
Yep, I'll add my voice in support of that too
Michael
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You received
. This is not too bad in general, but for cyclic
dfas it is.
Is this known? Are there workarounds available?
Thanks
Michael
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Good evening!
I have IR, that was written in C++. But there is only C runtime.
1) How can I add namespaces block in *.c file?
2) Is it possible to create some (e.g. 2) objects of ParserClass (or
LexerClass)? Yacc, as I know, generates C code with global variables. So..
what about antlr?
--
while this may not be the problem, it's a good idea to add catching of EOF to
your top grammar rule:
main: STATIC_MAIN '{' stats '}' EOF;
can't you narrow down the error, stripping away as much as possible?
It would be easier to find then...
cheers
Michael
List: http://www.antlr.org
is below.
if you write a space after your keyword_field then the lexer sees that the
KEYWORD rule gives a longer match than keyword_field and so matches to the
KEYWORD rule (it includes the spaces):
KEYWORD: CHAR(CHAR|' ')*;
which later fails since a wrong token is returned.
Michael
List
is not called but the URL rule is called
which raises an exception since the colon is missing.
No idea why .
cheers
Michael
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build
comprehensive translators ?
Michael
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Thanks!
Jim Idle j...@temporal-wave.com писал(а) в своём письме Wed, 13 May 2009
01:45:11 +0400:
Yurushkin Michael wrote:
Good day!
I use Antlr 3.
There are 2 grammar files (lexer and parser). Lexer contains tokens
definitions and parser imports tokens tabel.
Is it possible to avoid
Good day.
I have some problems with C runtime.
1) At first, when I try to load C.sln, VS2008 says that associated source
control plug-in is not installed on this computer. Source control will be
disabled for this project. What plug-in I need to install (I haven't seen
something about it in
Very nice - thanks for the link Steve
Michael
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rule in the tree grammar match the generated tree?, like:
policy: ^(POLICY targetType conditionStat) -
policyStat(cond={$conditionStat.st})
cheers,
Michael
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':' DELIM? param (',' DELIM? param)* { type =
$v.text; };
param: TOKEN DELIM? { list.add($TOKEN.text); } ;
Michael
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include the EOF token into your grammar.
cheers,
Michael
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comment version like this ( comments start with #
or // and go until end of the line):
NL: ('\r'? '\n')+ { skip();};
SINGLE_COMMENT: ('#' | '//') ~('\r' | '\n')* NL { skip();};
so change this to:
SINGLE_COMMENT: '-*' ~('\r' | '\n')* NL { skip();};
doesn't work?
cheers,
Michael
List: http
Am Thursday 07 May 2009 14:10:22 schrieb Thomas Dill:
grammar FexParser;
options {k=3; backtrack=true; memoize=true;}
report:(comment | text | NEWLINE)+ ;
comment :(COMMENT_START ~(NEWLINE))* ;
I think this does only read one -* and the next character (not till end of
: ( ~('-')
| ('-') ~'*') = '-'
);
Michael
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il
with it, maybe
like:
bool_function_content[Boolean value]
: {value != null value.booleanValue()}? = function_content*
|{value != null !value.booleanValue()}? =
overread_function_content*
;
cheers,
Michael
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comes with antlr 2.7.7
but I don't want to use that. I want to use antlr v3. Can anyone help me
out here?
you are using it: antlr3 depends on it, so add it to the classpath
cheers
Michael
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Try to add fragment prefix before DIGITO
On Mon, May 4, 2009 at 10:49 PM, Marwan Ajraoui marwan.ale...@gmail.com wrote:
Hi There;
I'm currently defining a grammar for a based tag language using ANTLR;
The problem I'm facing is that a single digit doesn't match my defined
rule INTEGER, here
^(conds+=CONDITION condExpression)
^(thens+=THEN expression)
))*
(^(ELSE else=expression))?
)
Michael
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+=block)* else? - ^IF(cond+,
block*, else)
to generate a tree which allready has the conds and elseif nodes collected.
Your tree is then like:
^(IF cond+ block+ else?)
Michael
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Hi,
I have a fairly simple grammar which give me an error I cannot resolve.
Could you please look at it? What does it mean and how to fix it?
Thanks a lot.
[14:20:29] warning(200): C:\tools\verilog\verilog_params\Test.g:4:43:
Decision can match input such as IDENT..ESCAPED_IDENT using
have any better ways to
solve this problem? Suggestions on how to match the 'foo' comment? Any
feedback is appreciated!
Thanks!
Michael
-
grammar KeepSomeComments;
root:declaration* EOF
doesn't seem to work.
http://www.antlr.org/hudson/job/ANTLR_Tool/lastSuccessfulBuild/ seems
like a good place to get the latest development build, but I can't
seem to actually find a download link anywhere?
Thanks!
Michael Coupland
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helpful!
Michael
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il-antlr
highlighted in the release notes for
3.1.3. It seems like a fairly major change and it caused me a lot of
grief for a while !
Michael
2009/4/22 Steve Souza st...@stevesouza.com:
This question in the antlr archives is the same one I have: Is this now
the correct practice where a tree walker
there anymore
!
I don't like this at all, but I believe in the thread that you cited
earlier someone says it is the intended behaviour.
Michael
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BufferedTreeNodeStream instead of CommonTreeNodeStream?
Yep - BufferedTreeNodeStream does what I want. But as to the logic of
the changes, or when either class is preferable, I'm afraid I don't
know. More docs on this would be nice.
Michael
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returns [int value]
: DIGIT+ { $value = Integer.parseInt($text); }
;
DIGIT : '0'..'9'
;
WS : (' ' | '\t' | '\n' | '\r') { $channel=HIDDEN; }
;
Hope this helps
Michael
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this helps
Michael
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il
Hi Indhu,
Thanks very much for posting this example - it explains something that
I want to do too.
Michael
2009/4/3 Indhu Bharathi indh...@s7software.com:
As expected, there were some bugs :-) Here is a implementation that works
fine:
grammar Test;
@members{
private
2009/4/1 Jim Idle wrote:
I'll check the examples, but:
The Libraries example has goals within configuration. The Netbeans
editor, following the pom schema I guess, doesn't suggest goals as an
element when you are within a configuration block, only outside.
Michael
List: http://www.antlr.org
to happen.
I've looked at the release notes but they are silent on this issue.
Any tips much appreciated.
Michael
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Sorry, that should have been
migrating an app from ANTLR 3.1.1 to 3.1.3
I've now also looked in the release notes for 3.1.2 but don't see my
answer there either (or perhaps I just don't understand it :). So,
still hoping for advice.
cheers
Michael
2009/4/1 Michael Bedward michael.bedw
(someone please let me know if I'm missing the
obvious).
Give the tree walker a BufferedTreeNodeStream stream instead of
CommonTreeNodeStream seems to fix the problem. Is this now the
correct practice where a tree walker is to be invoked repeatedly ?
cheers
Michael
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will be fixed eventually?
Best regards,
Michael
Dr. Michael Gerz
FGAN e.V. Phone: +49 228 9435-414
Department FKIE/ITF Fax:+49 228 9435-685
Neuenahrer Straße 20
and runTreeParser behind the parser constructor call.
Now it works :)
Regards
Michael
On Thursday 19 March 2009 15:55:01 Michael Pasdziernik wrote:
Hi,
I have some problems using gUnit with a custom tree class. I have tried to
patch gunit as described in the corresponding thread from march 2008
Hi Annie,
Sorry for the confusion on my part. I haven't used StringTemplate yet
and so went off in the wrong direction...
But luckily, I see that Johannes has proposed a solution for you on
the other thread about your question.
Michael
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= parser.getList();
Then it gives the AST and the list to Bwalker...
CommonTreeNodeStream nodes = new CommonTreeNodeStream(primaryAST);
nodes.setTokenStream(tokens);
BWalker bwalker = new BWalker(nodes);
bwalker.setList( listFromA );
BWalker.start_return r = bwalker.start();
Hope this helps
Michael
List: http
this is practical, but if it is,
or if there are multiple tree walking stages (ie. step 4, step 5 etc
each of which generates a new AST) then it can get tricky.
There was a recent discussion of this here...
http://www.antlr.org/pipermail/antlr-interest/2009-February/032799.html
Hope this helps
Michael
(or force you to write a coercion)...
if / gets a boolean and a char it can throw a type error...
Michael
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={$argumentSuffix.text})
;
what are the asterisks for ?
Michael
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the
grammar a little more readable).
I hope I'm answering the right question !
Michael
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You received
-end code, I would have thought it was
straightforward to check if there is a need for List etc. and only add
the imports when required.
Michael
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/hudson/job/Maven_Plugin/39/changes
...and then perhaps get back to us on the ANTLR list to discuss the
plugin with Jim Idle, the author of the current code.
All the best
Michael
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rustle, rustle...
that's the sound of me rubbing my hands together in anticipation :)
Michael
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Have a look at this page...
http://www.antlr.org/wiki/pages/viewpage.action?pageId=557063
Michael
2009/3/9 Sam Barnett-Cormack s.barnett-corm...@lancaster.ac.uk:
The whole point of the hidden channel (rather than just discarding) is
that the parser *can* tune to it, or use it for context
but it works.
Michael
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' ('\n')? | '\n';
Mmmm... I tried that one after seeing Joe's previous message, but
doesn't it have the same problem ? ie. it will eats a line:
#ABCD foo
...as a comment ? Does for me in ANTLRWorks. I must be missing something...
cheers
Michael
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Shouldn't do - you are using the debug mode and not the interpreting mode?
yep
I must be doing something wrong but I can't spot it... (probably too
close to my nose :)
Michael
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Hi Joe,
How about this...
NONCOMMENT : '#ABCD' { $channel = HIDDEN; }
;
COMMENT : '#' ~('\r' | '\n')* NEWLINE { $channel = HIDDEN; }
;
NEWLINE : '\r' ('\n')?
| '\n'
;
Michael
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goalantlr/goal
/goals
/execution
/executions
/plugin
cheers
Michael
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At the start of the rule the generated parser code will have...
var e:Token=null;
var list_e:Array=null;
and then in the sumStat rule loop...
if (list_e==null) list_e=new Array();
list_e.push(e);
Hope this helps,
Michael
2009/2/12 Des Hartman d...@deshartman.com:
I have a simple function
FORGOTTEN
Is the plugin source available ? I'm no expert but I've done a bit of
maven plugin hacking and I'd be happy to look at it.
cheers
Michael
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super - thanks Jim
Michael
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that's terrific Jim - many thanks
Michael
2009/2/13 Jim Idle j...@temporal-wave.com:
As well as deploying the source and javadoc jars to the ANTLR snapshot
repository (which means they will go to the maven central respository at the
next point release), the ANTLR Hudson continuous build
the value to
write to the output image pixel.
Dunno if that makes sense... If you read this far perhaps you can
tell me where the above transformations fit into your taxonomy. And
any other comments would also be welcome of course.
cheers
Michael
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Yes - I like what I see so far. It needs some updates for actions and
stuff like that (most of my grammar shows up red ;-), but I think that
it will be really good as it develops.
Well your grammars would probably make excellent advanced test cases
for the developer Jim...
Michael
List
it with only
the positional components to be evaluated at each image pixel
position.
Michael
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You
to error as the language evolves since it depends on
keeping all of clones in sync.
Are there other approaches / best-practices for writing multiple tree walkers ?
cheers
Michael
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option or similar that I'm missing (?)
Michael
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direction here :-)
Michael
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il
I guess a topographic map of the user-base in europe gives the answer ?
On Thu, 18 Dec 2008 01:34:32 +0100, Terence Parr pa...@cs.usfca.edu wrote:
On Dec 17, 2008, at 4:25 PM, Michael Fogeborg wrote:
What about an Antlr seminar in Europe ?
Maybe in Finland ?
Might be fun to do one
What about an Antlr seminar in Europe ?
Maybe in Finland ?
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To
= walker.expression();
Expression.evaluate has one argument - Msg. You can expand this to
include context-binding instead of Msg.
Basically, an expression is compiled during the program start time and
evaluate them during the runtime with some context.
I hope this helps.
Michael J. Lee
James Abley wrote
I'm using the latest ANTLRWorks plug-in with IntelliJ 7.0.4 and ANTLR 3.1.1.
I'm working my way through Definitive ANTLR Reference to climb the
learning curve. So far, so good. Brilliantly done - kudos to Terence Parr
and everyone who contributes.
I've hit a snag in section 3.2 when I start
When I went to generate a grammar for walking the AST for the expression
evaluation I got the following pop-up message:
cannot find tokens file unset-dir\Expr.tokens
Consult the console for more information.
The console is empty. I tell ANTLRWorks to write generated files to a
directory
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