Eclipse Community Forums: TMF (Xtext) » Define an int array return type

Help

Home

Home » Modeling » TMF (Xtext) » Define an int array return type

Show: Today's Messages :: Show Polls :: Message Navigator

Define an int array return type [message #1769220]

Fri, 28 July 2017 01:18

Waqas Ilyas

Messages: 80
Registered: July 2009

Member

Hi,

How can I define a data type rule that returns an int array?

Like for example have a look at this rule:

Bytes returns ecore::EByteArray hidden():
	TOKEN
;

The bytes here are unsigned so I want to use ecore:EIntArray instead. How can I do that?

Regards,
Waqas

Report message to a moderator

Re: Define an int array return type [message #1769230 is a reply to message #1769220]

Fri, 28 July 2017 06:04

Christian Dietrich

Messages: 14665
Registered: July 2009

Senior Member

i dont know a EIntArray in ecore.
so do you want to use a own edatatype and use it in xtext?
i think you need

- create a external ecore that define that datatype
- import that ecore in xtext
- write a valueconverter that supports the converstion from token to int[] and vice versa

Twitter : @chrdietrich
Blog : https://www.dietrich-it.de

Report message to a moderator

Re: Define an int array return type [message #1769305 is a reply to message #1769230]

Sat, 29 July 2017 01:22

Waqas Ilyas

Messages: 80
Registered: July 2009

Member

Thanks a lot for the reply. I can write value converters, right now I am using ecore::EJavaObject and my converter returns int[]. But how do i create an external ecore datatype, and import it into Xtext? Any pointers would be really helpful.

Report message to a moderator

Re: Define an int array return type [message #1769306 is a reply to message #1769305]

Sat, 29 July 2017 05:13

Christian Dietrich

Messages: 14665
Registered: July 2009

Senior Member

That requires some basic reading on the eclipse modeling framework (emf)

Twitter : @chrdietrich
Blog : https://www.dietrich-it.de

Report message to a moderator

Re: Define an int array return type [message #1769309 is a reply to message #1769306]

Sat, 29 July 2017 05:56

Waqas Ilyas

Messages: 80
Registered: July 2009

Member

I am familiar with EMF... have worked with it for a few years, but that was quite some time ago. I can try my hands at it again. Some pointers would be helpful.

Report message to a moderator

Re: Define an int array return type [message #1769310 is a reply to message #1769309]

Sat, 29 July 2017 06:22

Christian Dietrich

Messages: 14665
Registered: July 2009

Senior Member

Create empty emf project
Add Xtext nature

Create a ecore file
Create a epackage with a edatatype
Create genmodel
Generate code

Import package in Xtext

Adapt workflow
(referencedResource=.......genmodel"

Twitter : @chrdietrich
Blog : https://www.dietrich-it.de

Report message to a moderator