Haskell High Performance Programming

Numeric data for special use

The libraries in this subsection are as follows:

• base (module Data.Fixed): Standard fixed-precision arithmetic from the base. Precision decided at compile-time.
• Decimal (module Data.Decimal): Fixed-precision Decimal type and some additional utility functions. Precision decided in runtime.
• numbers (modules Data.Number.*): Constructive real numbers, multi-precision floats, fixed-precision decimals, and more. Precision decided at compile-time.

The Fixed datatype from base is good for fixed-precision arithmetic when you know the precision at compile-time. The precision is encoded as a phantom type, so it's not convenient to handle multiple precisions.

The Decimal library defines a more expressive DecimalRaw type and usually ...