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

Fri, 11 July 2014 19:15

Eclipse User

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 19:16] by Moderator

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

Sat, 12 July 2014 04:21

Eclipse User

Hi,

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

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

Sat, 12 July 2014 16:20

Eclipse User

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

[Updated on: Sat, 12 July 2014 16:45] by Moderator

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

Sun, 13 July 2014 10:38

Eclipse User

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 10:54] by Moderator

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

Sun, 13 July 2014 12:40

Eclipse User

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

Re: [Xtext] managing large numbers of rules [message #1401764 is a reply to message #1400057]

Wed, 16 July 2014 00:04

Eclipse User

Thanks,
I'll explore it.

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