Operator Functions

Operator functions allow you to define the meaning of well-known symbols such as + and - for your own types.

Introducing Operators

Kotlin’s operators allow calling functions using certain symbols. For instance, the infix + operator actually calls a plus function so that a + b translates to a.plus(b) under the hood.

Many operators use infix notation and therefore can be seen as an extension of infix functions. Instead of a function name, operator functions instead use an operator ...