17 lines
441 B
Nim
17 lines
441 B
Nim
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import pkg/questionable
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import pkg/questionable/operators
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export questionable
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proc `as`*[T](value: T, U: type): ?U =
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## Casts a value to another type, returns an Option.
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## When the cast succeeds, the option will contain the casted value.
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## When the cast fails, the option will have no value.
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when value is U:
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return some value
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elif value is ref object:
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if value of U:
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return some U(value)
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Option.liftBinary `as`
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