Hello

Is it there way to define pure struct without properties to write/read fields?
For example

type Coord = {
mutable X : float32;
mutable Y : float32;
}

let mutableLerp(a : Coord, b : Coord, k : float32, out : Coord) = begin
out.X <- a.X + (b.X - a.X) * k;
out.Y <- a.Y + (b.Y - a.Y) * k;
end

produces following code in reflection

public static void mutableLerp(Coord a, Coord b, float k, Coord @out)
{
@out.X = (a._X * (1f - b._X)) * k;
@out.Y = (a._Y * (1f - b._Y)) * k;
}

So reading is perfectly optimized, but writing is going thru properties.
How to avoid this?

Thanks.