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Inter grammar communication issue [message #906711]

Sun, 02 September 2012 05:47

Eclipse User

Hello ,

i'm splitting a larger grammar and i'm facing the following issue.

Highlighting the concept, the grammar deals with some master-detail "source" definitions and some master-detail "target" definitions which use the sources.

I'd like to move the "source" and "target" related stuff in different grammars.

The first grammar contains something like this:

Source1:
	name=ID
	elements+=Element1;

Source2:
	name=ID
	elements+=Element2;

Element1:
	name=ID;

Element2:
	name=ID;

I use these "sources" in a "target" so initially i had the following construct:

Source:
	Source1 | Source2;

Element:
	Element1 | Element2;

Target:
	name=ID source=[Source]
	features+=TargetElement;

TargetElement:
	name=ID source=[Element];

Now, when i reach a certain size in the second grammar, the impl/xxx.ecore gives "unresolved proxy exception" for the "Source" / "Element" constructs

For smaller size works as expected.

I use classSplitting = true in the mwe2 file

The initial grammars were built on xtext 1, i just upgraded to xtext 2.3.1

Any ideas about this ?

Thank you

[Updated on: Sun, 02 September 2012 07:11] by Moderator

Re: Inter grammar communication issue [message #907009 is a reply to message #906711]

Mon, 03 September 2012 02:17

Eclipse User

Not sure I unerstood.
Assuming you rely on generated ecore models in both grammars, you would
have to introduce a common super type in sources for Soruce1 & Source2
as well as Element1 & Element2. You can do so by adding the following
two rules to your source grammar:

> Source:
> Source1 | Source2;
>
> Element:
> Element1 | Element2;

Now in the target grammar you need to import the gnerated ecore file and
setup the mwe file accordingly (see the documentation for details).

You should be able to have references to Source and Element now.

Sven

Am 9/2/12 11:47 AM, schrieb attila Mising name:
> Hello ,
> i'm splitting a larger grammar and i'm facing the following issue.
> Highlighting the concept, the grammar deals with some master-detail
> "source" definitions and some master-detail "target" definitions which
> use the sources.
>
> I'd like to move the "source" and "target" related stuff in different
> grammars, however seems i'm missing something.
>
> The first grammar contains something like this:
>
>
> Source1:
> name=ID
> elements+=Element1;
>
> Source2:
> name=ID
> elements+=Element2;
>
> Element1:
> name=ID;
>
> Element2:
> name=ID;
>
>
>
> I use these "sources" in a "target" so initially i had the following
> construct:
>
>
> Source:
> Source1 | Source2;
>
> Element:
> Element1 | Element2;
>
> Target:
> name=ID source=[Source]
> features+=TargetElement;
>
> TargetElement:
> name=ID source=[Element];
>
>
>
> Now i want to move the target related stuff in a new grammar but the
> "Source" / "Element" constructs do not work in this scenario [ contains
> an unresolved proxy error ].
> Using a generic super type [as far as i know] is not really an option as
> i still need to deal separately with the Elements [ each Element(i) is
> quite different from Element(j) ]:
>
>
> Element1 returns Element:
> name=ID;
>
> Element2 returns Element:
> name=ID;
>
>
> Any suggestion on how to make this work ? ...
>
> Thank you

--
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Re: Inter grammar communication issue [message #907488 is a reply to message #907009]

Tue, 04 September 2012 01:21

Eclipse User

Thank you Sven, but the point of the message [ maybe shadowed by the details] was that after the second grammar grows over a certain size the Source/Element constructs are not visible due to " contains an unresolved proxy error " in the target ecore.
The weird part is that if i use Source1/Element1 [ the assigned calls ] in the second grammar it works

so: there are two grammars

g1 declares the sources, g2 declares the targets

everything works fine using the sources in targets

if g2 > certain_size the second ecore throws " contains an unresolved proxy error " for each of the unassigned calls from g1 used [i.e. Source /Element ]
However in this situation if i use in g2 the assigned calls [ any of the Source(n)/Element(n) instead of the Source/Element] it works

Luckily g2 could be further split into g2-1, g2-2 so i'm not blocked, but i still can't figure out the reason.

[Updated on: Tue, 04 September 2012 02:30] by Moderator

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