Crate num_err 

Bikeshedding

around

pub enum MathErrors {
    InvalidInput,
    Overflow,
    Underflow,
    DivisionByZero,
}

• performance
• only strict string matches, not upper or lowercase coersion for parse and serde
• does not capture backtrace nor errored values
• not float errors nor numerics errors
• JSON serde is string
• unit structs typed variants

Features

• default - []

• serde1- - serde

• borsh1 - borsh

• borsh1_unstable__schema - borsh schema

• protobuf3 - protobuf

• parity-scale-codec3 - parity-scale-codec

• schemars1 - schemars JSON schema

• proptest1 - proptest strategy

• arbitrary1 - arbitrary

• arbitrary-int1 - arbitrary-int u2

• error - dummy(for now) core::error::Error trait

Inspired

• https://docs.rs/sp-arithmetic/latest/sp_arithmetic/enum.ArithmeticError.html