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Implicit parameters [message #1082255]

Thu, 08 August 2013 09:54

Thomas Goossens

Messages: 32
Registered: August 2013

Member

In the DSL I'm creating I want in some special cases to have methods that implicitly have parameters (that you don't have to type, because they are ALWAYS there)

So:

function example(int a){

}

Should expand to:

public void example(int a, MyClass x){

}

For given parameters I could do:
parameter.toParameter(parameter.name, parameter.parameterType)

But I'm not sure what to do.

I don't expect a fully detailed answer, just some hints would make me already very happy :)

[Updated on: Thu, 08 August 2013 09:54]

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Re: Implicit parameters [message #1082326 is a reply to message #1082255]

Thu, 08 August 2013 12:15

Christian Dietrich

Messages: 14665
Registered: July 2009

Senior Member

Hi

you are talking about the jvmmodelinferrer right

so what about using

org.eclipse.xtext.common.types.util.TypeReferences.getTypeForName(String, Notifier, JvmTypeReference...)
to get a new type (first param is name of the class, second the context (in this case your funktion or the first parameter)

function.toParameter("x", type)

Twitter : @chrdietrich
Blog : https://www.dietrich-it.de

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Re: Implicit parameters [message #1082334 is a reply to message #1082255]

Thu, 08 August 2013 12:28

Ian McDevitt

Messages: 70
Registered: December 2012
Location: Belfast

Member

I have done something like this. If it helps here is a snippet if you are hard coding the values.

members += function.toMethod(function.name, function.newTypeRef("void")) [
  for (parameter : function.parameters) {
    parameters += parameter.toParameter(parameter.name, parameter.parameterType)
  }
  parameters += function.toParameter("x", function.newTypeRef("MyClass"))
]

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Re: Implicit parameters [message #1082343 is a reply to message #1082334]

Thu, 08 August 2013 12:39

Thomas Goossens

Messages: 32
Registered: August 2013

Member

Hi thanks for the help both

The snippet did the trick btw

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