Enum Arithmetic

pub enum Arithmetic {
    Int(i128),
    IEEE754(f64),
    Decimal(BigInt, i128),
    Float(BigInt, i128),
}

Representation of numeric values for the purpose of computation.

The rules for binary operations are:

• first bring both operands to the more precise of the two representations
• i128 and f64 use Rust native semantics; i128 overflow spills into Decimal
• +/-/% just act on the mantissa
• • uses m1*m2 * base^(e1+e2)
• / keeps the precision of the divident and truncates
• ^ extends precision of exponent to at least 0 and uses m1^m2 * base^(e1*m2) (in case of negative e2 followed by base^(-e2)-th root)

This implies the need for operators that convert to a specific precision.

Variants

Int(i128)

IEEE754(f64)

Decimal(BigInt, i128)

Float(BigInt, i128)