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Operator overloading in Xbase Expression [message #1816520]

Wed, 30 October 2019 12:25

Vikas Verma

Messages: 3
Registered: October 2019

Junior Member

I have created a custom data type in the xtext grammar .
In the JVMModel inferrer , it is inferred as java data type.

Now in Xbase xpression i want to overload the operators so that operations can be performed on the custom data type.

In below example custom data type is FIXED, which is actually BigDecimal.
Now i want to support > operator on BigDecimal.
Is it possible?
Example:

PrimitiveType:
fixed=('FIXED') '(' (scale=INT) ')';

DSL:

FIXED(2) bigtest
....
XblockXpression
{
var x = bigtest > 12

}

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Re: Operator overloading in Xbase Expression [message #1816626 is a reply to message #1816520]

Fri, 01 November 2019 17:56

Christian Dietrich

Messages: 14665
Registered: July 2009

Senior Member

operators are mapped to method names by the naming conventions described in
org.eclipse.xtext.xbase.scoping.featurecalls.OperatorMapping
the extension classes should be added to the classpath of the model projects.
you can either import them explicitly in the model files are implicitely by adapting
org.eclipse.xtext.xbase.scoping.batch.ImplicitlyImportedFeatures

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

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