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| interface Success<a> { | |
| kind: "success"; | |
| value: a; | |
| } | |
| interface Failure<e> { | |
| kind: "failure"; | |
| error: e; | |
| } | |
| type Result<a, e> = Success<a> | Failure<e>; | |
| const unit = <a>(a: a): Success<a> => ({ kind: "success", value: a }); | |
| const fail = <e>(e: e): Failure<e> => ({ kind: "failure", error: e }); | |
| function isSuccess(result: Result<any, any>): result is Success<any>{ | |
| return "value" in result; | |
| } | |
| function isError(result: Result<any, any>): result is Failure<any>{ | |
| return "error" in result; | |
| } | |
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