Created
October 7, 2012 21:55
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Tagged types representing units of price
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| trait Usd | |
| trait Eur | |
| trait ProfitCalculator[T] { | |
| def calculateProfit(executionPrice: BigDecimal @@ T, requestedPrice: BigDecimal @@ T): BigDecimal @@ T = | |
| tag(executionPrice - requestedPrice) | |
| } | |
| object ProfitCalculatorExample extends App { | |
| val usdProfitCalculator = new ProfitCalculator[Usd] {} | |
| // Does not compile | |
| // usdProfitCalculator.calculateProfit( | |
| // executionPrice = tag[Eur](BigDecimal(5)), | |
| // requestedPrice = tag[Usd](BigDecimal(5)) | |
| // ) | |
| val profit = usdProfitCalculator.calculateProfit( | |
| executionPrice = tag[Usd](BigDecimal(5)), | |
| requestedPrice = tag[Usd](BigDecimal(5)) | |
| ) | |
| println(profit) | |
| } |
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