Implementing std::ops::Add for arguments with disimilar types [closed]

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I want to create types, and implementations of std::ops::Add such that:

add(Position, Displacement) -> Position
add(Displacement, Displacement) -> Displacement

The purpose is to make nonsense operations, such as adding two positions, cause compile-time errors.

How can I do this, given that add()'s signature is: fn add(self, other: Self) -> Self::Output?

This is not the correct Add::add() signature. The correct one lets you do what you want. — Eugene Sh.
– Eugene Sh., Commented Jan 16 at 19:40

fadedbee · Accepted Answer · 2025-01-16 19:51:40Z

1

Got it to work, thanks to Eugene Sh.

impl Add<Displacement> for Position {
    type Output = Position;

    fn add(self, rhs: Displacement) -> Self::Output {
        Position::new(self.x + rhs.x, self.y + rhs.y)
    }
}

answered Jan 16 at 19:51

fadedbee

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