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[Acceleo] Disambiguate class reference [message #1806427]

Wed, 08 May 2019 22:00

Michaël Melchiore

Messages: 47
Registered: April 2012

Member

Hello,

I am currently writing an Acceleo (3.5.2) template where one of my input metamodel has a class named "Collection".

In the following template, the Acceleo compiler tags underlined text with the error ""Collection" unexpected token(s)"

[template public generateElement(aCollection : CollectionEntity) {
target : Collection = aCollection.referencedElement.oclAsType(Collection);
}]

I think this error is weird since my syntax is valid. Replacing "Collection" with any other classes from my input metamodels does remove the error.
So, I think there is somekind of name conflict here, perhaps with OCL own "Collection" ?

Do you know a way to solve of workaround this issue ?
I cannot change the input metamodel.

Kind regards,

Michaël

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Re: [Acceleo] Disambiguate class reference [message #1806432 is a reply to message #1806427]

Thu, 09 May 2019 04:34

Adriano Carvalho

Messages: 53
Registered: November 2018

Member

Did you try prefixing"Collection" with the metamodel name?

I don't know Acceleo's syntax but should be something like "metamodel_name.Collection" (where "." may also be "::" or "!*).

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Re: [Acceleo] Disambiguate class reference [message #1806437 is a reply to message #1806432]

Thu, 09 May 2019 06:52

Ed Willink

Messages: 6796
Registered: July 2009

Senior Member

Hi

While "Collection" is not a reserved word in OCL, it is built-in to the grammar; it is therefore referred to as a restricted name. These can be used with care. Package qualification as suggested earlier should work. If the context is clear the old ("_Collection") or new ("_'Collection'") style of escaping may also work. If you are unlucky you may need both: PackageName::_'Collection'.

Regards

ED Willink

[Updated on: Thu, 09 May 2019 11:09]

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