This module provides the Number type and many operations upon it.
Most of the operations are provided by making Number an instance
of the classes Num, Real, Enum, Integral, Fractional, Floating,
and RealFrac. These are, I think, all of the normal Haskell
numeric type classes *except* RealFloat.
There are also a few functions defined in addition to the
class methods.
The *primary* purpose of this module is to be the library module
used by Sifflet programs exported to Haskell.
The *secondary* purpose (maybe no less important, but
realized after the first) is to implement the Sifflet
number Values (currently done with the VInt and VFloat constructors).
|
| Take a number, which may be exact or inexact, and
produce the inexact number which equals it.
Note that there is no inverse function toExact,
because some inexact numbers like 3.5 are not equal to any exact number.
The class RealFrac provides methods round, ceiling, floor, truncate
for converting to exact numbers.
|
Instances