27 lines
856 B
Haskell
27 lines
856 B
Haskell
-- ledger-compatible money management tools
|
|
-- (c) 2007 Simon Michael & contributors, released under GPL v3 or later
|
|
|
|
import Control.Exception (assert)
|
|
|
|
-- data model
|
|
type Date = String
|
|
type Account = String
|
|
type Money = Float
|
|
-- a transaction records a movement of money between two accounts
|
|
data Transaction = Transaction {
|
|
date :: Date,
|
|
account :: Account, -- debit this
|
|
other_account :: Account, -- credit this
|
|
description :: String,
|
|
amount :: Money
|
|
}
|
|
|
|
-- sample data
|
|
t1 = Transaction "2007-01-01" "checking" "food" "joe's diner" 8.50
|
|
|
|
-- tests
|
|
main = do
|
|
assert_ $ amount t1 == 8.50
|
|
putStrLn "ok"
|
|
where assert_ e = assert e return ()
|