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[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]

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

Sat, 12 July 2014 08:21

Christian Dietrich

Messages: 14665
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

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

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

Sat, 12 July 2014 20:20

Neeraj Bhusare

Messages: 177
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]

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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]

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

Sun, 13 July 2014 16:40

Christian Dietrich

Messages: 14665
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

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

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