Eclipse Community Forums: TMF (Xtext)

Home » Modeling » TMF (Xtext) » Cross references(I want to decide whether to cross-reference or not in a rule based on the content)

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

Cross references [message #1862849]

Tue, 02 January 2024 09:48

David Sun

Messages: 45
Registered: July 2020

Member

I defined a DSL A using xtext. This DSL is used to define user-defined types, such as struct types and array types.

STRUCT STUDENT
{
NAME:STRING,
AGE:INT
}

I've defined another DSL B. When a variable is defined in DSL B, the type of the variable can be a user-defined type (for example, a user-defined struct type) or a primitive type (for example, INT, STRING).

VAR ANDY:STUDENT;//The user-defined type STUDENT is used
VAR ROOMNUM:INT;//The primitive type INT is used

The rule I need to implement now is that in the DSL B grammar file, it is possible to define a rule that if the variable's data type is from a user-defined type, then it is cross-referenced, and if the variable's type is primitive, then no cross-reference is used.

Can you give me some advice?
Thanks a lot!

Report message to a moderator

Re: Cross references [message #1862851 is a reply to message #1862849]

Tue, 02 January 2024 11:54

Christian Dietrich

Messages: 14735
Registered: July 2009

Senior Member

i did not understand what you want to achieve.
you can introduced reserved keywords for the primitive stuff and then use

TypeThing: PrimitiveType | ReferencedType;
PrimitiveType: "string"|"int";
ReferencedType: type=[Type];
but am not sure if that is truely what you mean

Twitter : @chrdietrich
Blog : https://www.dietrich-it.de
Day Job: https://www.everest-systems.com

[Updated on: Tue, 02 January 2024 11:54]

Report message to a moderator

Previous Topic:	Reference from xxxx will not be updated as the language has not registered an IReferenceUpdater
Next Topic:	How to include some multiline comments in the model instance ?

Goto Forum:

-=] Back to Top [=-

[ Syndicate this forum (XML) ] [

]

Current Time: Thu Dec 05 19:42:17 GMT 2024

.:: Contact :: Home ::.

Breadcrumbs

Sign up to our Newsletter