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How to get AST from plugin project [message #760041]

Thu, 01 December 2011 04:55

Jeff

Messages: 7
Registered: November 2011

Junior Member

Ok, so what I'm trying to do is create an eclipse plugin that displays a graph of part of a language's AST.

I've been looking, but the closest thing I can find is the org.eclipse.emf.transaction.listeners extension point, but I'm not sure if this will work, given that none of the projects extend the org.eclipse.emf.transaction.editingDomains extension point, at least as far as I can see.

Is there an extension point that I can extend, or something that I can add to the xtext generator which will let me get at this?

[Updated on: Thu, 01 December 2011 23:46]

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Re: How to get AST from plugin project [message #760338 is a reply to message #760041]

Thu, 01 December 2011 23:45

Jeff

Messages: 7
Registered: November 2011

Junior Member

So, I'm still stuck on this.
Every time a project is built from my DSL, it generates java code from an AST.
All I'm looking for is to hook into the AST at that point. How do I do this?

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Re: How to get AST from plugin project [message #760354 is a reply to message #760338]

Fri, 02 December 2011 06:06

Ed Willink

Messages: 7049
Registered: July 2009

Senior Member

On 01/12/2011 23:45, Jeff wrote:
> So, I'm still stuck on this.
> Every time a project is built from my DSL, it generates java code from
> an AST.
> All I'm looking for is to hook into the AST at that point. How do I do
> this?
Look for the *.ecore file; it is a (meta-)model

Regards

Ed Willink

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Re: How to get AST from plugin project [message #760478 is a reply to message #760338]

Fri, 02 December 2011 14:04

Henrik Lindberg

Messages: 2509
Registered: July 2009

Senior Member

Not sure I understand your question.

Your DSL (x) is expressed in a grammar x.xtext.
Xtext generates (among other things) an ecore model (x.ecore).
EMF then generates Java code - an implementation of this model.

Later an instance of your language x.dsl is parsed by the generated
parser and an instance of the ecore.model is created.
At this point, you may have a builder that generates Java code for this
model (i.e. x.java).

What exactly is it you want to process? The x.ecore, or the model of an
x.dsl ?

Regards
- henrik

On 2011-02-12 24:45, Jeff wrote:
> So, I'm still stuck on this.
> Every time a project is built from my DSL, it generates java code from
> an AST.
> All I'm looking for is to hook into the AST at that point. How do I do
> this?

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Re: How to get AST from plugin project [message #760725 is a reply to message #760478]

Sun, 04 December 2011 20:58

Jeff

Messages: 7
Registered: November 2011

Junior Member

The model of an x.dsl.
I think I may have figured out a way of doing it, but I'm not sure if it's right - I'll have a shot at it, but any tips are appreciated.

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Re: How to get AST from plugin project [message #760811 is a reply to message #760725]

Mon, 05 December 2011 10:46

Meinte Boersma

Messages: 434
Registered: July 2009
Location: Leiden, Netherlands

Senior Member

You could have a look at: https://github.com/dslmeinte/EMF-Statistics-View (fork)
Also, "Visualizing the AST" in http://dslmeinte.wordpress.com/2010/09/06/tricks-for-implementing-scoping/ explains how to do this manually in Eclipse.

Xtext blogs: executable models...again? | workshop material | custom scoping with Xtend

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Re: How to get AST from plugin project [message #760813 is a reply to message #760725]

Mon, 05 December 2011 10:47

Henrik Lindberg

Messages: 2509
Registered: July 2009

Senior Member

On 2011-04-12 21:58, Jeff wrote:
> The model of an x.dsl.
> I think I may have figured out a way of doing it, but I'm not sure if
> it's right - I'll have a shot at it, but any tips are appreciated.

A builder would probably work the best.
- henrik

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