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[Xcore] Setting default value of a string [message #1735188]

Thu, 16 June 2016 08:34

chris yo

Messages: 146
Registered: February 2013

Senior Member

I want to set the default value of a string which is defined in a static variable in xtend.
But I am getting this error:
Multiple markers at this line
- missing RULE_STRING at 'MyStaticObjects'
- MyStaticObjectscannot be resolved to a type.
- extraneous input '::' expecting RULE_ID
- A generic type in this context must refer to a classifier or
a type parameter

I use it like this:

class Directory {
String name = MyStaticObjects::DEFAULT_NAME
}

May I know how to initialize a string to a static variable?

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Re: [Xcore] Setting default value of a string [message #1735220 is a reply to message #1735188]

Thu, 16 June 2016 11:54

Ed Merks

Messages: 33136
Registered: July 2009

Senior Member

You can only specify a literal string value, not an arbitrary expression.

On 16.06.2016 04:34, chris yo wrote:
> I want to set the default value of a string which is defined in a
> static variable in xtend.
> But I am getting this error:
> Multiple markers at this line
> - missing RULE_STRING at 'MyStaticObjects'
> - MyStaticObjectscannot be resolved to a type.
> - extraneous input '::' expecting RULE_ID
> - A generic type in this context must refer to a classifier or
> a type parameter
>
> I use it like this:
>
>
> class Directory {
> String name = MyStaticObjects::DEFAULT_NAME
> }
>
>
> May I know how to initialize a string to a static variable?

Ed Merks
Professional Support: https://www.macromodeling.com/

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Re: [Xcore] Setting default value of a string [message #1735288 is a reply to message #1735220]

Fri, 17 June 2016 02:35

chris yo

Messages: 146
Registered: February 2013

Senior Member

Is there a plan to add this feature in the future? This will be something nice to have.

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Re: [Xcore] Setting default value of a string [message #1735323 is a reply to message #1735288]

Fri, 17 June 2016 11:17

Ed Merks

Messages: 33136
Registered: July 2009

Senior Member

Chris,

No, not really. In the end, an Xcore instance just maps to an Ecore and
GenModel instance, and an EStructuralFeature has a "default value"
literal attribute, i.e., a fix constant, not some expression that would
need to be evaluated at runtime...

On 16.06.2016 22:35, chris yo wrote:
> Is there a plan to add this feature in the future? This will be
> something nice to have.

Ed Merks
Professional Support: https://www.macromodeling.com/

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