Derive Macro SaturatingAdd 

#[derive(SaturatingAdd)]
{
    // Attributes available to this derive:
    #[saturating_add]
}

Implements num::traits::SaturatingAdd for a struct by delegating to each field. Supports setting bounds with #[saturating_add(bound = "T: SomeTrait")]

Example

#[derive(SaturatingAdd)]
struct MyStruct(usize);

adds

impl num::traits::SaturatingAdd for MyStruct {
    fn saturating_add(&self, v: &Self) -> Self {
        Self(self.0.saturating_add(&v.0))
    }
}