penny-0.32.0.10: Extensible double-entry accounting system

Safe Haskell	Safe-Inferred

Penny.Lincoln.Natural

Description

Natural numbers, either positive or non-zero. These wrap Int rather than Integers so do not use them were unlimited precision is needed.

Documentation

data NonNegative Source

Instances

Eq NonNegative
Ord NonNegative
Show NonNegative

nonNegative :: Int -> Maybe NonNegative Source

data Positive Source

Instances

Eq Positive
Ord Positive
Show Positive

positive :: Int -> Maybe Positive Source