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Cross-referencing to non-Xtext elements [message #1690986]

Wed, 01 April 2015 12:39

Vlad Dumitrescu

Messages: 430
Registered: July 2009
Location: Gothenburg

Senior Member

Hi!

I've been away from Xtext for a couple of years now and I have a feeling that I saw the answer to this question somewhere, but can't find it now. I hope someone can point me right or answer.

I have a DSL used to generate C code and it contains references to other C code. If I want to navigate between the DSL and C, I need to either
- fill the Xtext index with elements from the C code (locating the C elements off-line)
- catch "unresolved references" and ask locate the element when needed

What would be the right way? If the first option, then how do I let the index know about the external elements?

Thanks in advance!

best regards,
Vlad

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Re: Cross-referencing to non-Xtext elements [message #1694129 is a reply to message #1690986]

Thu, 30 April 2015 18:09

Sven Efftinge

Messages: 1823
Registered: July 2009

Senior Member

Hi Vlad,

I would go with the first suggestion. We do exactly that for Java.
In order to put non-xtext languages on the scope (into the index) you need to redefine their signatures in terms of EMF elements and then register a ResourceServiceProvider that will transform the original representation into an EMF one. You'll likely also need a special resource implementation and URI scheme.
It is best to look at the org.eclipse.xtext.common.types bundle to see how we do that for Java.

Cheers,
Sven

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