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Question on cross-referencing and scoping [message #1016248]

Tue, 05 March 2013 16:01

Marco Naddeo

Messages: 62
Registered: November 2012

Member

Hi all

I have a question on cross-referencing and scoping: if I declare in my DSL grammar a cross-reference and I do not define a particular scope for it, which is the default one?

If my cross-reference has type T, should I always see all occurences of T in the model, right?

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Re: Question on cross-referencing and scoping [message #1016255 is a reply to message #1016248]

Tue, 05 March 2013 16:40

Christian Dietrich

Messages: 13359
Registered: July 2009

Senior Member

Hi

you see all instances of T (inclusive subtypes) in all model files in the project (and referenced ones) if they are exported to the xtext index (= have a name attribute)

~Christian

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Re: Question on cross-referencing and scoping [message #1016256 is a reply to message #1016255]

Tue, 05 March 2013 16:41

Christian Dietrich

Messages: 13359
Registered: July 2009

Senior Member

P.S:

And the qualified name has to be serializable at the point

[T] is short for the [T|ID] => a ID will parsed and you wont see thze objects if their name contains a .

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Re: Question on cross-referencing and scoping [message #1016422 is a reply to message #1016256]

Wed, 06 March 2013 12:06

Marco Naddeo

Messages: 62
Registered: November 2012

Member

Christian Dietrich wrote on Tue, 05 March 2013 11:41

P.S:

And the qualified name has to be serializable at the point

[T] is short for the [T|ID] => a ID will parsed and you wont see thze objects if their name contains a .

I think this is my problem, because on method content assist I only see the methods declared in the same mixin where I'm writing code, and not the others.

And in fact I'm using qualified names:

fragment = exporting.QualifiedNamesFragment {}

However, as in Java editor, on a method call I don't want to refer to the called method using a qualified name as (for example):

ClassName.methodName

but a simple one:

methodName

How can I get this? Rolling Eyes

I have to enable the SimpleNamesFragment instead of the QualifiedNamesFragment one?

Thanks in advance,
Marco

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Re: Question on cross-referencing and scoping [message #1016444 is a reply to message #1016422]

Wed, 06 March 2013 13:29

Christian Dietrich

Messages: 13359
Registered: July 2009

Senior Member

Did you try [T|FQN]
With FQN : ID ("." ID)*;

--
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Re: Question on cross-referencing and scoping [message #1016456 is a reply to message #1016444]

Wed, 06 March 2013 14:10

Marco Naddeo

Messages: 62
Registered: November 2012

Member

Yes, I tried, in that way I see all methods in content assist drop-down, but I obtain this error message when I generate Xtext Artifacts from grammar:

Decision can match input such as "'.' RULE_ID '.' RULE_ID '.' RULE_ID '.' RULE_ID" using multiple alternatives: 1, 2

that is, my grammar is now ambiguous, right?

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Re: Question on cross-referencing and scoping [message #1016461 is a reply to message #1016456]

Wed, 06 March 2013 14:44

Christian Dietrich

Messages: 13359
Registered: July 2009

Senior Member

Yes so you can either fix that use simple name provider or give
explicitly a simple name in the defaultdeclarativenameprovider

--
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Re: Question on cross-referencing and scoping [message #1016977 is a reply to message #1016255]

Fri, 08 March 2013 12:39

Lorenzo Bettini

Messages: 1762
Registered: July 2009
Location: Firenze, Italy

Senior Member

On 03/05/2013 05:40 PM, Christian Dietrich wrote:
> Hi
>
> you see all instances of T (inclusive subtypes) in all model files in
> the project (and referenced ones) if they are exported to the xtext
> index (= have a name attribute)
>
> ~Christian

Sorry if I jump in the discussion:
if there are containment relations the default scoping will take care of
that, won't it? Because of the default qualified name provider which
takes containment relation into account, right?

--
Lorenzo Bettini, PhD in Computer Science, DI, Univ. Torino
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