Eclipse Community Forums: TMF (Xtext) » Value Converters in Xtext

Help

Home

Home » Modeling » TMF (Xtext) » Value Converters in Xtext(Value Converters in Xtext)

Show: Today's Messages :: Show Polls :: Message Navigator

Value Converters in Xtext [message #1114705]

Mon, 23 September 2013 05:15

Arshad Adavani

Messages: 163
Registered: July 2013
Location: Bangalore

Senior Member

Hello all,
Can we use Value Convertes in xtext for the rules which are not terminal?
If yes then , Can someone let me know how do I do it ?

Thanks in advance Smile

Arshad

Report message to a moderator

Re: Value Converters in Xtext [message #1114711 is a reply to message #1114705]

Mon, 23 September 2013 05:21

Christian Dietrich

Messages: 14665
Registered: July 2009

Senior Member

Hi

I guess you are not talking about data type rules (which are actually
parsed)

For the rest: no.

Can you give some more hints on your usecase

--
Need training, onsite consulting or any other kind of help for Xtext?
Go visit http://xtext.itemis.com or send a mail to xtext at itemis dot de

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

Report message to a moderator

Re: Value Converters in Xtext [message #1114718 is a reply to message #1114711]

Mon, 23 September 2013 05:39

Arshad Adavani

Messages: 163
Registered: July 2013
Location: Bangalore

Senior Member

Hi Christian,
Thanks for your reply Smile

Ok Let me explain you my use case,

I have a grammar something like:

SomeExpression:
SomeOtherExpr (rest part of the grammar);

SomeOtherExpr:
SomeAnotherExpr (rest part of the grammar);

SomeAnotherExpr:
INT | DOUBLE| LONG ;

For me , SomeExpression rule will return some value at the end which I am interested in.
So can I write the value converter for SomeExpression ?

Thanks in advance Smile

Arshad

Report message to a moderator

Re: Value Converters in Xtext [message #1114723 is a reply to message #1114718]

Mon, 23 September 2013 05:44

Christian Dietrich

Messages: 14665
Registered: July 2009

Senior Member

hi,

the problem is; your snippet is incomplete, you dont use assignments, so i cannot say.
if you dont use assignment then rulecalls mean "is a" and thus inheritance

SomeOtherExpr:
value=SomeAnotherExpr (rest part of the grammar);

SomeAnotherExpr:
INT | DOUBLE| LONG ;

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

Report message to a moderator

Re: Value Converters in Xtext [message #1114751 is a reply to message #1114723]

Mon, 23 September 2013 06:42

Arshad Adavani

Messages: 163
Registered: July 2013
Location: Bangalore

Senior Member

Hi Christian,
I missed one point.
In my grammar, I have the assignment like:
value=SomeExpression
And this SomeExpression has sub rules and assignments as written above.
I want to write a value Converter for this SomeExpression. I tried writing it. The method is getting called but I get string as null value in toValue(final String string, final INode node) method.
Any suggestions??

Thanks in advance Smile

Arshad

Report message to a moderator

Re: Value Converters in Xtext [message #1114755 is a reply to message #1114751]

Mon, 23 September 2013 06:46

Christian Dietrich

Messages: 14665
Registered: July 2009

Senior Member

Please show all relevant parts of the grammar.
Strip it down to a simple example grammar.

Please note: do not use any assignments In datatye rules.BTW your
type is string (the grammar snippet indicates that)

--
Need training, onsite consulting or any other kind of help for Xtext?
Go visit http://xtext.itemis.com or send a mail to xtext at itemis dot de

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

Report message to a moderator

Previous Topic:	Two similar rules, but with different cross-references
Next Topic:	URIImport of a non-xtext resource and referencing of its declared objects

Goto Forum:

-=] Back to Top [=-

[ Syndicate this forum (XML) ] [

]

Current Time: Fri Apr 19 22:32:27 GMT 2024

.:: Contact :: Home ::.

Breadcrumbs

Sign up to our Newsletter