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RedBeard0531/unwrap_future.nim

Created December 19, 2017 17:26
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unwrap_future.nim
import asyncdispatch
proc unwrap[T](outer: Future[Future[T]]): Future[T] =
result = newFuture[T]()
let res = result
outer.addCallback do:
# TODO try/catch to handle errors
outer.read().addCallback do (inner: Future[T]):
res.complete(inner.read())
proc addDoubleWrapped*(a, b: Future[Future[int]]): Future[int] {.async.} =
return await(a.unwrap) + await(b.unwrap)
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