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Extending Java Grammar [message #1703486]

Sat, 01 August 2015 07:09

waltervt88gmail.com Dirksen

Messages: 1
Registered: July 2015

Junior Member

I'd like to add operator overloading and custom operators to the Java grammar. I believe it is not possible in Xtext to inherit and extent the Java grammar by default and add this custom behavior. A possible approach includes porting the antlr Java grammar to Xtext; an unattractive approach. I am also wondering if it possible to add custom operators, for example but purely illustrative: <|.

Another approach seems taking the XTend grammar and make it more like Java. As I am new to XText I'm most likely missing better alternatives. Please advise.

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Re: Extending Java Grammar [message #1703615 is a reply to message #1703486]

Mon, 03 August 2015 16:22

Christian Dietrich

Messages: 14716
Registered: July 2009

Senior Member

I recommed you to have a look at xbase (the expression part of xtext) it is covered in the xtext tutorial in the docs (have a look at domainmodel example as well)
Maybe the following is interesting for you as well https://github.com/LorenzoBettini/javamm

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

[Updated on: Mon, 03 August 2015 16:23]

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Re: Extending Java Grammar [message #1703620 is a reply to message #1703615]

Mon, 03 August 2015 16:35

Lorenzo Bettini

Messages: 1813
Registered: July 2009
Location: Firenze, Italy

Senior Member

On 03/08/2015 18:22, Christian Dietrich wrote:
> Maybe the following is interesting for you as
> well https://github.com/LorenzoBettini/javamm

with that respect, I'm working on extracting from javamm a reusable
expression language which is a customization of Xbase but with Java
expression language. I can't promise it'll be ready by the end of
August, but I'm working on that :)

Of course, you need to be familiar with Xbase concepts though.

cheers
Lorenzo

--
Lorenzo Bettini, PhD in Computer Science, DI, Univ. Torino
HOME: http://www.lorenzobettini.it
Xtext Book:
http://www.packtpub.com/implementing-domain-specific-languages-with-xtext-and-xtend/book

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

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