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

Thu, 13 April 2017 18:29

Eclipse User

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

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

Tue, 18 April 2017 02:26

Eclipse User

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.

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

Tue, 18 April 2017 11:26

Eclipse User

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

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

Tue, 29 January 2019 09:23

Eclipse User

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

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

Tue, 29 January 2019 10:50

Eclipse User

i dont understand

the solution applied would be

admin = [Customer|Name]

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

Tue, 29 January 2019 12:30

Eclipse User

Hi Christian,

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

Thanks again,
David

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

Tue, 29 January 2019 13:01

Eclipse User

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

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