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JvmEnumerationLiteral has no support for parameters [message #1724941]

Sat, 27 February 2016 12:42

Scott Forbes

Messages: 4
Registered: February 2016

Junior Member

Hi! I'm converting an old Xpand model-to-Java project to Xtend 2.9.1 and seem to have found a missing feature. My suggested fix would be:

In org.eclipse.xtext.common.types/model/JavaVMTypes.ecore
types.JvmEnumerationLiteral
add

parameters:JvmFormalParameter[*]

In org.eclipse.xtext.xbase.compiler.JvmModelGenerator

generateEnumLiteral(JvmEnumerationLiteral, ITreeAppendable, GeneratorConfig)

replace the TODO comment with

appendable.append("(")
generateEnumLiteralParameters(appendable, config)
appendable.append(")")

and add

def void generateEnumLiteralParameters(JvmEnumerationLiteral it, ITreeAppendable appendable, GeneratorConfig config)

based on

generateParameters(JvmExecutable it, ITreeAppendable appendable, GeneratorConfig config)

Enum literals will always be a special case because they are also instances.

Would that be all that was needed?

I'm more than happy to do this myself, what's the process?

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Re: JvmEnumerationLiteral has no support for parameters [message #1724964 is a reply to message #1724941]

Sun, 28 February 2016 08:04

Sven Efftinge

Messages: 83
Registered: January 2016
Location: Kiel

Member

I think you mixed up formal parameter declarations with actual arguments. In this case we would need the latter, i.e. expressions.
It would need to be implemented similarly to how we provide implementations for methods and initializers for fields.

See also : https://bugs.eclipse.org/bugs/show_bug.cgi?id=372771

Generally speaking you are welcome to contribute pull-requests.
See https://github.com/eclipse/xtext/blob/master/README.md#how-to-contribute for instructions.

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Re: JvmEnumerationLiteral has no support for parameters [message #1725023 is a reply to message #1724964]

Mon, 29 February 2016 08:00

Scott Forbes

Messages: 4
Registered: February 2016

Junior Member

You're right, of course. From now on I'll call the declaration 'parameters' and the instances 'arguments', that should stop me muddling them up again. Thanks very much for the workaround, it works great, I didn't find that. I get a lot of 'discouraged access' though. I'll read the contribute howto and go back to the drawing board. Thanks again.

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