Operator overloading

Inko supports a variety of operators (see for the full list), and these can be implemented for your own types. In fact, operators are just regular methods, though the compiler may choose to optimise some of them whenever possible.

Operators are provided by the various traits found in the module std.ops. For example, the + operator is provided by the Add trait. Here's how we might implement this operator for a custom type:

import std.ops (Add)

type Rational {
  let @numerator: Int
  let @denominator: Int
}

impl Add[Rational, Rational] for Rational {
  fn pub +(other: ref Rational) -> Rational {
    Rational(
      numerator: @numerator + other.numerator,
      denominator: @denominator + other.denominator
    )
  }
}