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How to generate code from Xbase expressions [message #1745268]

Fri, 07 October 2016 07:07

Olaf Bigalk

Messages: 155
Registered: July 2009
Location: Berlin

Senior Member

I am experimenting with Xbase my first time. I want to generate code from my Xbase expressions I entered into my DSL but if I parse the Xbase expression object tree I find some bogus JvmVoidImplCustom objects.
I guess that there must be some linking behind the scenes.
How can I get the identifiers I entered to my expressions ?
What do I need to do ?
Is there some standard mechanism to privide Xbase with a set of valid identifieres ?

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Re: How to generate code from Xbase expressions [message #1745283 is a reply to message #1745268]

Fri, 07 October 2016 09:34

Christian Dietrich

Messages: 14735
Registered: July 2009

Senior Member

i am not sure: JvmModelGenerator + XbaseCompiler asume to find a model that ran through the inferrer and XbaseTypeComputer having seen the complete expression tree.
so can you elabtorate what you are actually doing.

Twitter : @chrdietrich
Blog : https://www.dietrich-it.de
Day Job: https://www.everest-systems.com

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Re: How to generate code from Xbase expressions [message #1745291 is a reply to message #1745283]

Fri, 07 October 2016 10:49

Olaf Bigalk

Messages: 155
Registered: July 2009
Location: Berlin

Senior Member

I am using XExpressions in my DSL but I am not using the JvmInferrer and I don't know the XbaseCompiler and XbaseTypeComputer.
Can I use the later ones outside the JvmInferrer ?
I want to generate Xtend instead of Java and I have my own Generator. I want to use the Xbase syntax to form java/xtend-like expressions and transform them into Xtend code in the end.

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Re: How to generate code from Xbase expressions [message #1745304 is a reply to message #1745291]

Fri, 07 October 2016 11:48

Christian Dietrich

Messages: 14735
Registered: July 2009

Senior Member

generating xtend wont work anyway since the xtext builder wont pick up files generated by xtext. and yes you need a jvmmodelinferrer and types computer run to be able to generate from the expressions using the exising generator.

Twitter : @chrdietrich
Blog : https://www.dietrich-it.de
Day Job: https://www.everest-systems.com

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Re: How to generate code from Xbase expressions [message #1745354 is a reply to message #1745304]

Fri, 07 October 2016 20:15

Olaf Bigalk

Messages: 155
Registered: July 2009
Location: Berlin

Senior Member

How does the TypesComputer work ? Do you have some code examples or a pointer ?

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Re: How to generate code from Xbase expressions [message #1745357 is a reply to message #1745354]

Sat, 08 October 2016 05:30

Christian Dietrich

Messages: 14735
Registered: July 2009

Senior Member

From an API or from a impl point of view?

Twitter : @chrdietrich
Blog : https://www.dietrich-it.de
Day Job: https://www.everest-systems.com

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Re: How to generate code from Xbase expressions [message #1745358 is a reply to message #1745357]

Sat, 08 October 2016 05:35

Christian Dietrich

Messages: 14735
Registered: July 2009

Senior Member

I just reccommend you to have a look at the domain model example and see how

Inferrer (provides jvmmodelassociations and logical containers for expressions - e.g. To which field initializers and methods bodies which expression should be mapped

The type computer

And the xbase compiler

Play together and how to components are called

By do some debugging

Twitter : @chrdietrich
Blog : https://www.dietrich-it.de
Day Job: https://www.everest-systems.com

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Re: How to generate code from Xbase expressions [message #1745363 is a reply to message #1745354]

Sat, 08 October 2016 10:23

Lorenzo Bettini

Messages: 1815
Registered: July 2009
Location: Firenze, Italy

Senior Member

Olaf Bigalk wrote on Fri, 07 October 2016 20:15

How does the TypesComputer work ? Do you have some code examples or a pointer ?

Besides having a look at the domain model example, Xbase and a few advanced concepts related to Xbase (like the type computer and compiler customization) are covered to some extent in the second edition of my Xtext book, https://www.packtpub.com/application-development/implementing-domain-specific-languages-xtext-and-xtend-second-edition

hope it helps
Lorenzo

HOME: http://www.lorenzobettini.it
TDD Book: https://leanpub.com/tdd-buildautomation-ci
Xtext Book: https://www.packtpub.com/application-development/implementing-domain-specific-languages-xtext-and-xtend-second-edition

[Updated on: Tue, 18 October 2016 07:58]

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