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deque-blog/MoneyKentBeckEval.hs

Last active August 14, 2017 15:50
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MoneyKentBeckEval.hs
evalMoneyIn :: -- Evaluate an Money expression
(Conversion -> Maybe Rate) -- * Given a way to retrieve a rate
-> MoneyExpr -- * A money expression to evaluate
-> Currency -- * And a destination currency
-> Maybe Money -- Returns a known amount (or fails)
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