Safe Haskell	Safe
Language	Haskell98

Currency.Rates

Synopsis

Documentation

data Rates a b #

A map from currency to exchange rate against some reference currency

Constructors

Rates
Fields reference :: a rates :: Map a b

Instances

(Eq a, Eq b) => Eq (Rates a b) #
Instance details Defined in Currency.Rates Methods (==) :: Rates a b -> Rates a b -> Bool # (/=) :: Rates a b -> Rates a b -> Bool #
(Ord a, Read a, Read b) => Read (Rates a b) #
Instance details Defined in Currency.Rates Methods readsPrec :: Int -> ReadS (Rates a b) # readList :: ReadS [Rates a b] # readPrec :: ReadPrec (Rates a b) # readListPrec :: ReadPrec [Rates a b] #
(Show a, Show b) => Show (Rates a b) #
Instance details Defined in Currency.Rates Methods showsPrec :: Int -> Rates a b -> ShowS # show :: Rates a b -> String # showList :: [Rates a b] -> ShowS #

rebase :: (Ord a, Fractional b) => a -> Rates a b -> Rates a b #

Change the reference currency to a different one found in the Map

Arguments

Convenience function for getting a single exchange rate

If you're doing a lot of conversions, use rebase and lookup