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scalaoperator-overloadingprimitive-types
Mike
Mike

Reputation: 1011

Is it possible to overload the operators for the primitive numeric types in scala?

I created a ComplexNumber class. I would like to be able to do something like

val c = ComplexNumber(1,3); 3 * c;

but that would require overloading * for int, double, etc. Is this possible?

Upvotes: 0

Views: 170

Answers (1)

jwvh
jwvh

Reputation: 51271

You need to define an implicit conversion for each type you want to operate on. A convenient place for this is in the companion object.

object ComplexNumber {
  import scala.language.implicitConversions
  implicit def i2cn(i:Int):ComplexNumber = new ComplexNumber(....
}

Now 3 * c will work as long as the * method is defined as part of the ComplexNumber class.

class ComplexNumber(a:Int, b:Int) {
  def *(cn:ComplexNumber): ComplexNumber = ...
}

Upvotes: 4

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