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[xtend] Ecore post processing [message #698770]

Wed, 20 July 2011 03:53

Balazs Varnai
Messages: 21
Registered: June 2011

Junior Member

Hi,

Consider the following '.ext' file for my xtxt


process(xtext::GeneratedMetamodel this) :
  process(ePackage)
;
 
process(ecore::EPackage this) :
    {
	var i = 100
	}
;

The problem is that language constructs like var/for/if etc., are underlined as syntax errors. I tried to use java 'println' but 'import' also fails. Xtend project nature was added.

Thanks!

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Re: [xtend] Ecore post processing [message #698782 is a reply to message #698770]

Wed, 20 July 2011 04:20

Alexander Nittka
Messages: 1073
Registered: July 2009

Senior Member

Hi,

note that ".ext" files are not Xtend2-Files. It is the "old" Xtend. The eclipse help also contains the language definitions for Xpand/Xtend/Check.

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: [xtend] Ecore post processing [message #698783 is a reply to message #698770]

Wed, 20 July 2011 04:20

Christian Dietrich
Messages: 4394
Registered: July 2009

Senior Member

Hi,

if you write invalid syntax you of course get syntax errors:
.ext is Xpand/Xtend(1)
.xtend is Xtend(2)

~Christian

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Re: [xtend] Ecore post processing [message #698788 is a reply to message #698783]

Wed, 20 July 2011 04:26

Balazs Varnai
Messages: 21
Registered: June 2011

Junior Member

Let me quote the xtext2 reference section Customized Post Processing

Quote:

As a last step, the generator invokes the post processor for every generated Ecore model. The post processor expects an Xtend1 file with name MyDslPostProcessor.ext (if the name of the grammar file is MyDsl.xtext) in the same folder as the grammar file.

So I can use xtend2 files in post processing? Thanks!

By the way Eclipse help contains Xtend content, no mention of xtend1/xtend2 which is kind of misleading.

[Updated on: Wed, 20 July 2011 04:29]

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