The following code generates a compile error and I'm confused as to why. Why
doesn't the await keyword give me a string to work with in this case?
import asyncdispatch
proc fa(i: int): Future[string] =
var fut = newFuture[string]("fa")
fut.complete("fa: " & $i)
result = fut
proc fb(s: string): Future[string] =
var fut = newFuture[string]("fb")
fut.complete("fb: " & s)
result = fut
proc fc(i: int): Future[string] {.async.} =
let a = await fa(i)
result = fb(a) # <-- compile error
when isMainModule:
echo(waitFor fa(3))
echo(waitFor fb("main"))
echo(waitFor fc(3))
Run
b1.nim(13, 35) template/generic instantiation of `async` from here
b1.nim(15, 14) Error: type mismatch: got <Future[system.string]> but
expected 'string'
Run
