numeric-prelude-0.0.2: An experimental alternative hierarchy of numeric type classes Contents Index

Number.NonNegative Portability Haskell 98 Stability stable Maintainer haskell@henning-thielemann.de

Description

A type for non-negative numbers. It performs a run-time check at construction time (i.e. at run-time) and is a member of the non-negative number type class C.

Synopsis

T fromNumber :: (Ord a, C a) => a -> T a fromNumberMsg :: (Ord a, C a) => String -> a -> T a fromNumberClip :: (Ord a, C a) => a -> T a fromNumberUnsafe toNumber Int Integer Float Double type Ratio a = T (T a) type Rational = T Rational

Documentation

T

fromNumber :: (Ord a, C a) => a -> T a

Convert a number to a non-negative number. If a negative number is given, an error is raised.

fromNumberMsg

:: (Ord a, C a) => String name of the calling function to be used in the error message -> a -> T a

fromNumberClip :: (Ord a, C a) => a -> T a

Convert a number to a non-negative number. A negative number will be replaced by zero. Use this function with care since it may hide bugs.

fromNumberUnsafe

toNumber

Int

Integer

Float

Double

type Ratio a = T (T a)

type Rational = T Rational

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