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mismatched input '<EOF>' expecting [message #1038053]

Wed, 10 April 2013 10:47

junior developer

Messages: 354
Registered: January 2013

Senior Member

Hi All,

My grammar is below .I receive an error all time in the program.error :mismatched input '<EOF>' expecting RULE_NL. I do not solved this problem.I did several tests without success Sad

Could anybody of you give me a hint? How can I solved Sad

Best Regards

Model :
elements += Elements*
;

Elements:
('abstract')? name =ID (':' inheritance= [Elements|ID] )? NL
( children += Child (':' compartment =[Elements|ID])? NL ( (NL children += Child NL)*)? )?

;
Child:

(name =ID)
;
terminal NL:
(('\r' '\n')? ('\t')? )
;

[Updated on: Wed, 10 April 2013 11:18]

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Re: mismatched input '<EOF>' expecting [message #1038107 is a reply to message #1038053]

Wed, 10 April 2013 12:12

Claudio Heeg

Messages: 75
Registered: April 2013

Member

Hello,

as you should notice on running the Workflow, the language has ambiguities and thus, the terminal NL is ignored completely.
The main problem here is the terminal rule which, honestly, I can't make anything of. It's supposed to represent a new line, but can also be nothing or only a tab?
In any case, rules that could be built easily on terminals should be done with Datatype rules, as is nicely expressed here: [1].

That's just some general pointers from me, I suppose someone more experienced like Christian will deliver a more precise answer shortly.

--
[1] http://zarnekow.blogspot.de/2012/11/xtext-corner-6-data-types-terminals-why.html

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Re: mismatched input '<EOF>' expecting [message #1038129 is a reply to message #1038053]

Wed, 10 April 2013 12:44

Alexander Nittka

Messages: 1193
Registered: July 2009

Senior Member

Hi,

could you explain why you need the NL terminal at all?

Alex

Need training, onsite consulting or any other kind of help for Xtext?
Go visit http://xtext.itemis.com or send a mail to xtext@itemis.de

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Re: mismatched input '<EOF>' expecting [message #1038153 is a reply to message #1038129]

Wed, 10 April 2013 13:23

junior developer

Messages: 354
Registered: January 2013

Senior Member

Hi,

I can try indentation based grammar. load program and you can see outline view.I can try to providing this for NL rule.

Attachment: indentation based grammarr.png
(Size: 29.97KB, Downloaded 389 times)

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Re: mismatched input '<EOF>' expecting [message #1038159 is a reply to message #1038153]

Wed, 10 April 2013 13:32

Alexander Nittka

Messages: 1193
Registered: July 2009

Senior Member

Hi,

I don't think that your grammar approach will work for an indentation sensitive language. You may want to have a look at the following projects
http://code.google.com/p/arcas/source/browse/trunk/congen.xtext/?r=21#congen.xtext or https://github.com/sebastianbenz/eclipse-task-editor.

Alex

Need training, onsite consulting or any other kind of help for Xtext?
Go visit http://xtext.itemis.com or send a mail to xtext@itemis.de

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Re: mismatched input '<EOF>' expecting [message #1038170 is a reply to message #1038159]

Wed, 10 April 2013 13:51

junior developer

Messages: 354
Registered: January 2013

Senior Member

Hi Alex,

I can try only .I must look at example again.I will try example's method.thank you for help

Best Regards,

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Re: mismatched input '<EOF>' expecting [message #1038642 is a reply to message #1038159]

Thu, 11 April 2013 05:49

junior developer

Messages: 354
Registered: January 2013

Senior Member

Hi Alex ,

I can not reach this example : https://github.com/sebastianbenz/eclipse-task-editor.
Password and user name are wanted for download.You could share ?

Best regards

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Re: mismatched input '<EOF>' expecting [message #1038645 is a reply to message #1038642]

Thu, 11 April 2013 05:52

Christian Dietrich

Messages: 14665
Registered: July 2009

Senior Member

A simple git clone doesn't work?

--
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Twitter : @chrdietrich
Blog : https://www.dietrich-it.de

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