Option and Either conversion to Try

[Haney Maxwell]

Hi,

It looks like Option has toRight and toLeft, and LeftProjection and RightProjection have toOption, and Try has toOption, but Option => Try, Either => Try, and Try => Either aren't there. Is there a reason there isn't something like:

"

def toSuccess[X <: Throwable](failure: => X) =
  if (isEmpty) Failure(failure) else Success(this.get)
def toFailure[X](success: => X)(implicit ev: A <:< Throwable) =
  if (isEmpty) Success(success) else Failure(this.get)

"

in Option?

Thanks,

Haney Maxwell

[atomly]

can't you just do something like?

  opt.map(Success(_)).getOrElse(Failure(new Throwable("oops")))

or

  Try { opt.getOrElse(throw new Throwable("oops")) }

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[vatel]

Or even: Try { opt.get }

if the exception type is not important

--
Vatel

[Brendan Higgins]

I am actually also curious. Similiarly, Option is viewable as an Iterable since a None type can be thought of as empty and a Some type can be thought of as a singleton. So, as a matter of consistency and convenience, why does the standard library not do this for us?

[pagoda_5b]

See Option.toList()

http://www.scala-lang.org/api/current/#scala.Option

[pagoda_5b]

Sorry, I suspect that I've misread the question...

you meant why the standard library doesn't do it for Try?

Ivano

[Haney Maxwell]

Yeah, that was the question.

[Sonnenschein]

I think https://groups.google.com/forum/?fromgroups=#!topic/scala-debate/K6wv6KphJK0[1-25-false] is related to your question.
Peter