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December 6, 2016 01:53
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Using statically resolved types to remove a little boilerplate
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| // this works... | |
| let n = | |
| match System.Int32.TryParse("10") with | |
| | (true,n) -> Some n | _ -> None | |
| // but this is... | |
| let inline tryParse (s : string) : ^o option = | |
| let mutable o = Unchecked.defaultof<(^o)> | |
| if (^o : (static member TryParse: string * ^o byref -> bool) (s, &o)) then Some o else None | |
| // delicious | |
| tryParse "10" |> Option.map ((+)10uy) | |
| tryParse "10" |> Option.map ((+)10us) |
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