Eclipse Community Forums: TMF (Xtext) » [Xtext] managing large numbers of rules

Home » Modeling » TMF (Xtext) » [Xtext] managing large numbers of rules(how to have several xtext files just for a language (extension))

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

[Xtext] managing large numbers of rules [message #1399012]

Fri, 11 July 2014 23:15

duke vah

Messages: 33
Registered: December 2013

Member

I wonder if there is a way to have several grammar files for a language (metamodel)? I mean just for one file extension.
In large projects, writing all of rules inside a xtext file reduces modularity and needs lots of time for finding and managing.

[Updated on: Fri, 11 July 2014 23:16]

Report message to a moderator

Re: [Xtext] managing large numbers of rules [message #1399239 is a reply to message #1399012]

Sat, 12 July 2014 08:21

Christian Dietrich

Messages: 13530
Registered: July 2009

Senior Member

Hi,

there is only the single inheriance solution for that. depending on your usecase you could build several languages for different concerns as well

Need professional support for Xtext, Xpand, EMF?
Go to: https://www.itemis.com/en/xtext/
Twitter : @chrdietrich
Blog : https://www.dietrich-it.de

Report message to a moderator

Re: [Xtext] managing large numbers of rules [message #1399538 is a reply to message #1399239]

Sat, 12 July 2014 20:20

Neeraj Bhusare

Messages: 157
Registered: July 2009
Location: Canada

Senior Member

Hi,

Take a look at the example project [0]. I have abstracted out the common rules in the Parent dsl [1], and all the other dsl's [2] inherit from the parent. Hope this helps.

[0]https://github.com/nbhusare/Xtext-sandbox
[1]https://github.com/nbhusare/Xtext-sandbox/blob/master/org.neclipse.xtext.parentdsl/src/org/neclipse/xtext/parentdsl/ParentDsl.xtext
[2]
https://github.com/nbhusare/Xtext-sandbox/blob/master/org.neclipse.xtext.entitydsl/src/org/neclipse/xtext/entitydsl/EntityDsl.xtext
https://github.com/nbhusare/Xtext-sandbox/blob/master/org.neclipse.xtext.functiondsl/src/org/neclipse/xtext/functiondsl/FunctionDsl.xtext

Twitter : @NeerajBhusare
Blog : https://nbhusare.github.io/
Best regards, Neeraj

[Updated on: Sat, 12 July 2014 20:45]

Report message to a moderator

Re: [Xtext] managing large numbers of rules [message #1400003 is a reply to message #1399239]

Sun, 13 July 2014 14:38

duke vah

Messages: 33
Registered: December 2013

Member

Thanks for response.
What I need is something else. What you indicated is used for importing a new EMF model. Therefore, in these case we will have two or three meta models for two , three extensions. What I need is a concrete metamodel with just an extension. I just need a method to put grammars in several files so that I can manage them easily.
For example,
a language called "mydsl" with extexnsion ".dsl"
there are several xtext files when we compile them we'll get just one metdamodel related to just that extension.

[Updated on: Sun, 13 July 2014 14:54]

Report message to a moderator

Re: [Xtext] managing large numbers of rules [message #1400057 is a reply to message #1400003]

Sun, 13 July 2014 16:40

Christian Dietrich

Messages: 13530
Registered: July 2009

Senior Member

the only chance is to have a single inhertiance hierarchy and only the specialized one beeing exposed with a file extension.
have a look what xtext does for xtend/xbase

Need professional support for Xtext, Xpand, EMF?
Go to: https://www.itemis.com/en/xtext/
Twitter : @chrdietrich
Blog : https://www.dietrich-it.de

Report message to a moderator