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Default value of String [message #1176412]

Fri, 08 November 2013 10:13

Gunnar Boström

Messages: 26
Registered: February 2013

Junior Member

Hi,
Is it possible in the xtext grammar to define the default value of a String?
I don't want it to be null.

Actually I would like to add "structural" nodes to the outline.
One of the nodes is defines as
Accounts:
{Accounts}
name=STRING?
accounts+=Account*;

To set the name now I've overridden the _createChildren method in the OutlineTreeProvider as

if (childElement instanceof Accounts) {
val accs = childElement as Accounts
accs.name = "Accounts";
}

It would be much better and cleaner if I could provide the default value in the grammar.

/Gunnar

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Re: Default value of String [message #1176424 is a reply to message #1176412]

Fri, 08 November 2013 10:24

Uli Merkel

Messages: 250
Registered: June 2013

Senior Member

AFAIK, if you use an enumeration, the default is always the first option.
Perhaps you can use this in your grammar.

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Re: Default value of String [message #1176431 is a reply to message #1176424]

Fri, 08 November 2013 10:27

Christian Dietrich

Messages: 14665
Registered: July 2009

Senior Member

Hi,

cant you simply adopt the IQualifiedNameProvider??

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

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Re: Default value of String [message #1176525 is a reply to message #1176424]

Fri, 08 November 2013 11:40

Gunnar Boström

Messages: 26
Registered: February 2013

Junior Member

Uli Merkel wrote on Fri, 08 November 2013 05:24

AFAIK, if you use an enumeration, the default is always the first option.
Perhaps you can use this in your grammar.

I tried that but the outline view but the name must be a string for the outline to work.

/Gunnar

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Re: Default value of String [message #1176532 is a reply to message #1176431]

Fri, 08 November 2013 11:45

Gunnar Boström

Messages: 26
Registered: February 2013

Junior Member

Christian Dietrich wrote on Fri, 08 November 2013 05:27

Hi,

cant you simply adopt the IQualifiedNameProvider??

Hi,
How can I use that?
Would it be simpler than the way I handle it now in the outline provider?
/Gunnar

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Re: Default value of String [message #1176544 is a reply to message #1176532]

Fri, 08 November 2013 11:54

Christian Dietrich

Messages: 14665
Registered: July 2009

Senior Member

sorry it is actually not used have a look at
org.eclipse.xtext.ui.label.DefaultEObjectLabelProvider.doGetText(Object)

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

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Re: Default value of String [message #1176545 is a reply to message #1176532]

Fri, 08 November 2013 11:53

Christian Dietrich

Messages: 14665
Registered: July 2009

Senior Member

Hi isn't that used by default? Please debug
DefaultDeclarativeNameProvider

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

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Re: Default value of String [message #1176573 is a reply to message #1176545]

Fri, 08 November 2013 12:16

Gunnar Boström

Messages: 26
Registered: February 2013

Junior Member

Hi,
Sorry but I'm to new with xtext to understand what I should do!
/Gunnar

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Re: Default value of String [message #1176581 is a reply to message #1176573]

Fri, 08 November 2013 12:22

Christian Dietrich

Messages: 14665
Registered: July 2009

Senior Member

Have a look at org.eclipse.xtext.ui.label.DefaultEObjectLabelProvider.doGetText(Object) ,
debug it, customize it (you should already have a sublass pregrenerated

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

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