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import asyncdispatch
proc completeOnReturn(fut: FutureVar[string], x: bool) {.async.} =
if x:
fut.mget() = ""
fut.mget.add("foobar")
return
proc completeOnImplicitReturn(fut: FutureVar[string], x: bool) {.async.} =
if x:
fut.mget() = ""
fut.mget.add("foobar")
proc failureTest(fut: FutureVar[string], x: bool) {.async.} =
if x:
raise newException(Exception, "Test")
proc manualComplete(fut: FutureVar[string], x: bool) {.async.} =
if x:
fut.mget() = "Hello World"
fut.complete()
return
proc main() {.async.} =
var fut: FutureVar[string]
fut = newFutureVar[string]()
await completeOnReturn(fut, true)
doAssert(fut.read() == "foobar")
fut = newFutureVar[string]()
await completeOnImplicitReturn(fut, true)
doAssert(fut.read() == "foobar")
fut = newFutureVar[string]()
let retFut = failureTest(fut, true)
yield retFut
doAssert(fut.read().len == 0)
doAssert(fut.finished)
fut = newFutureVar[string]()
await manualComplete(fut, true)
doAssert(fut.read() == "Hello World")
waitFor main()
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