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Referencing in a "fully qualified" way [message #673516]

Mon, 23 May 2011 18:52

Eclipse User

Hi,

I'm not sure how I can absolutely reference stuff in my DSL. I'm
experimenting a bit xText to create a DSL that takes the informations
from Qt-Header-Files.

The DSL allows me already to write things like this:

namespace Bla {
enumeration Bli {
BLI_1 = 0
BLI_2 = 1
BLI_3 = BLI_1
}
}

Now I need to reference stuff in an absolute way e.g. like this:

namespace Blo {
enumeration Bli {
BLI_1 = 0
BLI_2 = 1
BLI_3 = Bla.Bli.BLI_1
}
}

How do I have to express this using xText? You can see my current
xtext-File in my github-repository [1]. I've already read the example
given in http://www.eclipse.org/forums/index.php/t/209569/ and think I
have to define something similar but I have no idea what I'd write in my
case.

Tom

[1]https://github.com/tomsontom/model-qt/blob/master/modules/org.ufacekit.qt.idl.dsl/src/org/ufacekit/qt/idl/dsl/QIdl.xtext

Re: Referencing in a "fully qualified" way [message #673518 is a reply to message #673516]

Mon, 23 May 2011 19:08

Eclipse User

Am 24.05.11 00:52, schrieb Tom Schindl:
> Hi,
>
> I'm not sure how I can absolutely reference stuff in my DSL. I'm
> experimenting a bit xText to create a DSL that takes the informations
> from Qt-Header-Files.
>
> The DSL allows me already to write things like this:
>
> namespace Bla {
> enumeration Bli {
> BLI_1 = 0
> BLI_2 = 1
> BLI_3 = BLI_1
> }
> }
>
> Now I need to reference stuff in an absolute way e.g. like this:
>
> namespace Blo {
> enumeration Bli {
> BLI_1 = 0
> BLI_2 = 1
> BLI_3 = Bla.Bli.BLI_1
> }
> }
>
> How do I have to express this using xText? You can see my current
> xtext-File in my github-repository [1]. I've already read the example
> given in http://www.eclipse.org/forums/index.php/t/209569/ and think I
> have to define something similar but I have no idea what I'd write in my
> case.
>
> Tom
>
> [1]https://github.com/tomsontom/model-qt/blob/master/modules/org.ufacekit.qt.idl.dsl/src/org/ufacekit/qt/idl/dsl/QIdl.xtext

Or even better:

namespace Bla {
namespace Blu {
enumeration Bli {
BLI_1 = 0
BLI_2 = 1
BLI_3 = BLI_1
}
}
}

namespace Blo {
enumeration Bli {
BLI_1 = 0
BLI_2 = 1
BLI_3 = Bla.Blu.Bli.BLI_1
}
}

Tom

Re: Referencing in a "fully qualified" way [message #673565 is a reply to message #673518]

Tue, 24 May 2011 02:28

Eclipse User

Hi,

this is supported out of the box. Have a look at the domainmodel example shipped with Xtext. The key is the datatype rule

QualifiedName: ID ('.' ID)*;

and doing the cross references like that

ref=[Type|QualifiedName]

meaning (refer to an element of type Type using the string representation of a Qualified name (x.y.z). It the element lies in the same namespace (x.z) z can be referenced via its short name (z) automatically (but also via x.y.z). The documenation briefly covers namespaces and namespace imports.

Alex

Re: Referencing in a &quot;fully qualified&quot; way [message #673933 is a reply to message #673565]

Wed, 25 May 2011 04:11

Eclipse User

Hi Alexander,

Works like a charme. Thanks.

Tom

Am 24.05.11 08:28, schrieb Alexander Nittka:
> Hi,
>
> this is supported out of the box. Have a look at the domainmodel example
> shipped with Xtext. The key is the datatype rule
>
> QualifiedName: ID ('.' ID)*;
>
> and doing the cross references like that
>
> ref=[Type|QualifiedName]
>
> meaning (refer to an element of type Type using the string
> representation of a Qualified name (x.y.z). It the element lies in the
> same namespace (x.z) z can be referenced via its short name (z)
> automatically (but also via x.y.z). The documenation briefly covers
> namespaces and namespace imports.
>
> Alex
>
>
>

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