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Set an property which not defined in the grammar [message #1386837]

Sat, 21 June 2014 10:22

Elhamlaoui Mahmoud

Messages: 268
Registered: March 2010

Senior Member

Hi,

I want to set programatically a property of an EMF Object. If we take for instance the grammar below, i need to set a property that is not present in the grammar (but it is in my metamodel) when the name is writen.

Model:
greetings+=Greeting*;
Greeting:
'Hello' name=ID '!';

Thanks in advance

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Re: Set an property which not defined in the grammar [message #1386841 is a reply to message #1386837]

Sat, 21 June 2014 12:50

Christian Dietrich

Messages: 14665
Registered: July 2009

Senior Member

Hi,

do you have a handwritten metamodel? if no you can use http://christiandietrich.wordpress.com/2011/07/22/customizing-xtext-metamodel-inference-using-xtend2/ to add additional stuff to the metamodel.
to acutally set the property you could use IDerivedStateComputer. You may have to adapt ITransientValueService as well.

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

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