Data.Finance.Money

newtype Discrete (c :: Currency)

An amount of money in the smallest discrete unit of a particular currency. For example, wrap 256 :: Discrete GBP would represent £2.56, whereas wrap 256 :: Discrete JPY would represent ¥256. If you want to work with higher granularity, you can define your own currency type.

Constructors

• Discrete Int

Instances

• Eq (Discrete c)
• Ord (Discrete c)
• Generic (Discrete c)
• Newtype (Discrete c) _
• Show (Discrete c)
• LeftModule (Discrete c) Int
• RightModule (Discrete c) Int

formatDiscrete :: forall c. Currency c => Format -> Discrete c -> String

Apply a format to a discrete amount.

showDiscrete :: forall c. Currency c => Discrete c -> String

DEPRECATED: use formatDiscrete instead.

Show the discrete value with the correct number of decimals. Will not prepend the currency sign. Negative amounts are prefixed with a hyphen-minus.

Examples:

• showDiscrete (Discrete 256 :: Discrete GBP) == "2.56"
• showDiscrete (Discrete (-256) :: Discrete GBP) == "-2.56"

newtype Dense (c :: Currency)

Amounts of money with exact arithmetic.

Constructors

• Dense Rational

Instances

• Eq (Dense c)
• Ord (Dense c)
• Newtype (Dense c) _
• Show (Dense c)
• LeftModule (Dense c) Rational
• RightModule (Dense c) Rational

formatDense :: forall c. Currency c => Rounding -> Format -> Dense c -> String

data Rounding

Rounding policy.

Constructors

• Up
• Down
• ToZero
• FromZero
• Nearest

Instances

• Eq Rounding
• Ord Rounding

fromDiscrete :: forall c. Currency c => Discrete c -> Dense c

Convert a discrete amount to a dense amount.

fromDense :: forall c. Currency c => Rounding -> Dense c -> Discrete c

Convert a dense amount to a discrete amount, rounding accordingly.