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43f09e8c86
To match the style of std/options, where option() is also used to convert a ref to an Option.
64 lines
1.4 KiB
Nim
64 lines
1.4 KiB
Nim
import ./resultsbase
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import ./options
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import ./operators
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include ./errorban
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export resultsbase
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template `?!`*(T: typed): type Result[T, ref CatchableError] =
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Result[T, ref CatchableError]
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proc success*[T](value: T): ?!T =
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ok(?!T, value)
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proc failure*(T: type, error: ref CatchableError): ?!T =
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err(?!T, error)
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template `->?`*(option: ?!typed, expression: untyped): untyped =
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type T = type expression
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if option.isErr:
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T.failure(option.error)
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else:
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expression.success
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template `->?`*(options: (?!typed, ?!typed), expression: untyped): untyped =
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type T = type expression
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if options[0].isErr:
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T.failure(options[0].error)
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elif options[1].isErr:
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T.failure(options[1].error)
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else:
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expression.success
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template `|?`*[T](value: ?!T, fallback: T): T =
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value.valueOr(fallback)
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template `=?`*[T](name: untyped{nkIdent}, value: ?!T): bool =
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template name: T {.used.} = value.unsafeGet()
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value.isOk
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proc option*[T,E](value: Result[T,E]): ?T =
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if value.isOk:
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value.unsafeGet.some
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else:
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T.none
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Result.liftUnary(`-`)
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Result.liftUnary(`+`)
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Result.liftUnary(`@`)
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Result.liftBinary(`[]`)
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Result.liftBinary(`*`)
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Result.liftBinary(`/`)
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Result.liftBinary(`div`)
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Result.liftBinary(`mod`)
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Result.liftBinary(`shl`)
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Result.liftBinary(`shr`)
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Result.liftBinary(`+`)
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Result.liftBinary(`-`)
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Result.liftBinary(`&`)
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Result.liftBinary(`<=`)
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Result.liftBinary(`<`)
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Result.liftBinary(`>=`)
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Result.liftBinary(`>`)
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