CODEWITHSUNDEEP
scala
Cherry
Cherry

Reputation: 33598

How perform native arithmetic in scala instead of method call?

If I write expression 1+2 in scala, it means that actually + method call on object 1. But how is + function implemented? If it like this:

public Int + (one: Int, two: Int) {
    return one + two
}
//Sorry if syntax is not well correct

it leads to infinite recursion because + is function and calls itself.

So logically, there must be a way to tell scala do "native" addition operation instead of + function call.

How to do that?

Upvotes: 0

Views: 56

Answers (1)

axel22
axel22

Reputation: 32335

The + method is an intrinsic method -- it is translated by the Scala compiler specially. The Scala compiler rewrites + method calls to addition instructions in bytecode.

1 + 2

becomes (in bytecode):

iconst_1
iconst_2
iadd

Upvotes: 4

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