struct Float(f32);

impl PartialEq<f32> for Float {
    fn eq(&self, other: &f32) -> bool {
        (self.0 as f32).eq(other)
    }
}

impl PartialEq<f64> for Float {
    fn eq(&self, other: &f64) -> bool {
        (self.0 as f64).eq(other)
    }
}

fn main() {
    let f = Float(5.0);
    let a = 10.0f32;
    let b = 10.0f64;
    let c = 10.0;
    dbg!(f == a);
    dbg!(f == b);
    dbg!(f == c);
    dbg!(std::mem::size_of_val(&a));
    dbg!(std::mem::size_of_val(&b));
    dbg!(std::mem::size_of_val(&c)); // <- this cast and compares both
}