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discard """
output: '''
0
1
2
3
4
5
Done
Finished
'''
"""
import asyncdispatch
var fs = newFutureStream[int]()
proc alpha() {.async.} =
for i in 0 .. 5:
await fs.write(i)
await sleepAsync(100)
echo("Done")
fs.complete()
proc beta() {.async.} =
while not fs.finished:
let (hasValue, value) = await fs.read()
if hasValue:
echo(value)
echo("Finished")
asyncCheck alpha()
waitFor beta()
template ensureCallbacksAreScheduled =
# callbacks are called directly if the dispatcher is not running
discard getGlobalDispatcher()
proc testCompletion() {.async.} =
ensureCallbacksAreScheduled
var stream = newFutureStream[string]()
for i in 1..5:
await stream.write($i)
var readFuture = stream.readAll()
stream.complete()
yield readFuture
let data = readFuture.read()
doAssert(data.len == 5, "actual data len = " & $data.len)
waitFor testCompletion()
# TODO: Something like this should work eventually.
# proc delta(): FutureStream[string] {.async.} =
# for i in 0 .. 5:
# await sleepAsync(1000)
# result.put($i)
# return ""
# proc omega() {.async.} =
# let fut = delta()
# while not fut.finished():
# echo(await fs.takeAsync())
# echo("Finished")
# waitFor omega()
|
