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Cross reference with dot in a name [message #1759620]

Thu, 13 April 2017 22:29

wces wces

Messages: 1
Registered: April 2017

Junior Member

I have a grammar in which variable names can have dots in them.
But when I try to use cross reference for it. It is not able to find it when there is a dot in var name.
xtext seems to be treating these dots specially. How can I force xtext stop treating the dots specially.

VarDecl:
'VAR' name=VarID ';'
;

VarID:
ID ('.' ID)*
;
Assign:
left=[VarDecl|VarID] '=' right=ID

Works:
VAR varName;
varName = x

Doesn't work: (cannot find var.name)
VAR var.name;
var.name = x

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Re: Cross reference with dot in a name [message #1759794 is a reply to message #1759620]

Tue, 18 April 2017 06:26

Christian Dietrich

Messages: 13280
Registered: July 2009

Senior Member

hi,

i cannot reproduce this.
can you please share everything needed to reproduce it. e.g. did you customizations to scoping, nameproviders etc.
do you have other stuff in the grammar that could interfer etc.

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Re: Cross reference with dot in a name [message #1759803 is a reply to message #1759794]

Tue, 18 April 2017 15:26

Uli Merkel

Messages: 246
Registered: June 2013

Senior Member

Hi,

the "qualified name" is based on hierarchy of objects, each on has his simple name (just the delivered ID, no dots).
The dots come into place where you want to refer to an object inside a higher level object:
classA.variableB

which are defined as
class A { variable B}

HIH, Uli

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Re: Cross reference with dot in a name [message #1801919 is a reply to message #1759803]

Tue, 29 January 2019 14:23

David Paz

Messages: 9
Registered: November 2013

Junior Member

Hi,

i have this same issue. I will post details here to not open another thread, please just tell me if i should open another.

My intention, same as the author, is only to have dots "." in the name no import or package representation. Only being able to parse name with dots and resolve them in cross references.

My grammar is like:

Name:
    ID ('.' ID)*
;

Email:
    Name '@' Name
;

Customer:
	'customer' name = Name	'email'	email = Email
;

Application:
    'application' name = ID 'administrator' admin = [Customer]

I don't have any customization in place, so no custom ScopeProvider or NameProvider.

I can declare customers like stated in before rules

customer test.user email test.user@test.com

But as soon as i try to use them in a cross reference:

application AppTest administrator test.user

i receive the error:

Couldn't resolve reference to Customer 'test'.

Any hint will be welcome,

Thanks in advance,
David

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Re: Cross reference with dot in a name [message #1801935 is a reply to message #1801919]

Tue, 29 January 2019 15:50

Christian Dietrich

Messages: 13280
Registered: July 2009

Senior Member

i dont understand

the solution applied would be

admin = [Customer|Name]

Need professional support for Xtext, Xpand, EMF?
Go to: https://www.itemis.com/en/xtext/
Twitter : @chrdietrich
Blog : https://www.dietrich-it.de

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Re: Cross reference with dot in a name [message #1801943 is a reply to message #1801935]

Tue, 29 January 2019 17:30

David Paz

Messages: 9
Registered: November 2013

Junior Member

Hi Christian,

thanks! That solved the issue.
Now I find my self wondering why is needed both alternatives :-)

Thanks again,
David

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Re: Cross reference with dot in a name [message #1801949 is a reply to message #1801943]

Tue, 29 January 2019 18:01

Christian Dietrich

Messages: 13280
Registered: July 2009

Senior Member

admin = [Customer] is short for admin = [Customer|ID] which means: reference to customer, parse ID
ID does not allow .

Need professional support for Xtext, Xpand, EMF?
Go to: https://www.itemis.com/en/xtext/
Twitter : @chrdietrich
Blog : https://www.dietrich-it.de

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