Arithmetic ops with underflow semantics for UnsignedDecimal

[tsionyx]

Thanks for the great project!

Are there plans to support methods like {checked,saturating,wrapping}_{add,sub,mul}and alike from the num_traits?

Maybe this conflicts with the current notion of Signals to handle overflow/underflow?

[neogenie]

@tsionyx

Thank you for participating in the project!

You can use the feature numtraits.

It includes support for traits from num_traits for integers and decimal numbers.

Methods like {checked,saturating,wrapping}_{add,sub,mul} are already implemented (both as native const methods and generalized methods from num_traits) for integers.

In the terminology of decimal numbers, such methods do not make sense (and they are absent in num_traits or native Rust methods for f32/f64): for example, the wrapping operation is fundamentally absent for them, and overflow is implemented through signals and INF.

[tsionyx]

I am sorry, my bad. My use case is basically about UnsignedDecimal and it have a lower bound zero(), so my question is about specific support of UnsignedDecimal::{checked,saturating}_ops to prevent default wrapping/panic behaviour when underflow happens.