Eclipse Community Forums: TMF (Xtext) » I have a problem with grammar

Home » Modeling » TMF (Xtext) » I have a problem with grammar

I have a problem with grammar [message #51823]

Tue, 16 June 2009 07:14

Eclipse User

Hello, I want to use the tool but my problem is that I can not really, can
I use a simple BNF grammar or is there a particular format to respect?
Thank you for your help

Re: I have a problem with grammar [message #51906 is a reply to message #51823]

Tue, 16 June 2009 14:57

Eclipse User

Originally posted by: peter.friese.itemis.com

Farah,

On 2009-06-16 13:14:26 +0200, farah.fourati@hotmail.fr (farah ) said:

> Hello, I want to use the tool but my problem is that I can not really,
> can I use a simple BNF grammar or is there a particular format to
> respect? Thank you for your help

You have to use the Xtext grammar to define your DSL. It is quite
similar to EBNF. If you have an existing EBNF-style grammar it should
be easy to translate it (manually).

If you like, you can post your EBNF grammar here and we will provide
clues on how to translate it.

Peter

Re: I have a problem with grammar [message #51931 is a reply to message #51906]

Tue, 16 June 2009 19:07

Eclipse User

Hello,
this is an extract from BNF that I would look for its metamodel

SpecList := Spec | SpecList Spec;
Spec := Configuration | Style;

Style := "Style" SimpleName
[ TypeList ]
[ "Constraints"
[ ConstraintExpression ] ]
"End Style";

TypeList := Type | TypeList Type ;
Type := Component | Connector | InterfaceType;

...

Please I would like to know how it is possible to do it manually

thank you for your help

Farah

Re: I have a problem with grammar [message #51984 is a reply to message #51931]

Tue, 16 June 2009 21:41

Eclipse User

I made some changes below, but I cannot complete since you did not post
the whole grammar.

Spec : Configuration | Style;

Style : "Style" name=SimpleName
(type+=Type)*
( "Constraints"
(expression=ConstraintExpression)? )?
"End Style";

Type : Component | Connector | InterfaceType;

Look into: http://wiki.eclipse.org/Xtext/GettingStarted

Re: I have a problem with grammar [message #52330 is a reply to message #51984]

Thu, 18 June 2009 19:11

Eclipse User

hello all of you:

i just want to demonstrate how i made the installation, i want to know if
it is correct or not.
i'm working on platform Windows
jdk java_ee_sdk-5_07-windows-ml
then I unzipped Xtext and i put it in a hidden folder/dropins
then help ->Install new software -> Galileo -
http://download.eclipse.org/releases/galileo
-> modelling ->next...finish
i'd asked you to help because when opening the page I receive 7 warnings
for grammar I would like to have an address where I can contact you.
Do you have a document that helps me and tell me what to do?
thanks

Previous Topic:	Re-designed xtext website
Next Topic:	getting link name after link resolution failure

Goto Forum:

-=] Back to Top [=-

Current Time: Sat Jun 07 22:48:04 EDT 2025

.:: Contact :: Home ::.

Breadcrumbs

Sign up to our Newsletter