A Decimal implementation written in pure Rust suitable for financial calculations that require significant integral and fractional digits with no round-off errors.
The binary representation consists of a 96 bit integer number, a scaling factor used to specify the decimal fraction and a 1 bit sign. Because of this representation, trailing zeros are preserved and may be exposed when in string form. These can be truncated using the
Currently, creating the decimal requires either specifying the scale upon creation, using a standard primitive type or parsing a string.
let scaled = Decimal::new(202, 2); // 2.02 let from_string = Decimal::from_str("2.02").unwrap(); // 2.02 let my_int : Decimal = 3i32.into();
Future versions will investigate the use of compiler extensions and macros to simplify this process.