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

Wed, 10 April 2013 06:47

Eclipse User

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 07:18] by Moderator

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

Wed, 10 April 2013 08:12

Eclipse User

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

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

Wed, 10 April 2013 08:44

Eclipse User

Hi,

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

Alex

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

Wed, 10 April 2013 09:23

Eclipse User

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 457 times)

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

Wed, 10 April 2013 09:32

Eclipse User

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

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

Wed, 10 April 2013 09:51

Eclipse User

Hi Alex,

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

Best Regards,

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

Thu, 11 April 2013 01:49

Eclipse User

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

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

Thu, 11 April 2013 01:52

Eclipse User

A simple git clone doesn't work?

--
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Go visit http://xtext.itemis.com or send a mail to xtext at itemis dot de

Re: mismatched input '<EOF>' expecting [message #1038656 is a reply to message #1038645]

Thu, 11 April 2013 02:19

Eclipse User

Hi Christian,

Yes,authentication is required Sad