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How to build a symbol table to be used within ScopeProvider and Validator? [message #1021490]

Wed, 20 March 2013 08:03

Shavarsh Odajavan

Messages: 7
Registered: March 2013

Junior Member

Hi, i would like to build a symbol table (in the parsing phase i suppose) which contains names and types of every VarDeclaration (a non terminal rule in my grammar) parsed. Is there a simple way to do it? My final goal is to use these informations within ScopeProvider while resolving cross references and to make things easier in the Validator (type checking in expressions, for example).
Thanks in advance,

Shavarsh

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Re: How to build a symbol table to be used within ScopeProvider and Validator? [message #1021502 is a reply to message #1021490]

Wed, 20 March 2013 08:34

Alexander Nittka

Messages: 1193
Registered: July 2009

Senior Member

Hi,

I guess what you call symbol table is Xtext's index. It stores information about all model elements exported by a resource (ynd you can influence the creation of the index.

Have a look at the documentation, http://blogs.itemis.de/stundzig/archives/809 may provide a first impression (somewhat outdated, as influencing the index creation has been simplified).

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: How to build a symbol table to be used within ScopeProvider and Validator? [message #1021584 is a reply to message #1021490]

Wed, 20 March 2013 10:53

Shavarsh Odajavan

Messages: 7
Registered: March 2013

Junior Member

Thanks for the answer Alexander.
I read the documentation but i would like to ask if you can make some examples, for better understanding. Maybe i wasn't much clear, but what i would like to build is a table with varName, type and some additional infos. The problem is i can't build it up while getting the scope because the ScopeProvider is called only when a reference is encountered. I would like to build it in the parse phase because it has to be done once and it will be available to use in ScopeProvider and Validator.

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