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operator

The operator keyword declares an overloaded operator on a type. It lets a type define custom behavior for built-in operators such as +, -, ==, and others.

Syntax & Example​

struct Vec2 {
    x: f64,
    y: f64,

    pub operator fn +(other: Vec2): Vec2 {
        return Vec2 { x: self.x + other.x, y: self.y + other.y };
    }
}

let a = Vec2 { x: 1.0, y: 2.0 };
let b = Vec2 { x: 3.0, y: 4.0 };
let c = a + b;

Use Cases​

  • Making user-defined types work naturally with built-in operators.
  • Implementing arithmetic, comparison, or indexing for domain types.
  • Keeping operator semantics co-located with the type they apply to.