Nimlang Nim await example

await_example.nim

import os, asyncnet, asyncdispatch


proc callback1(): Future[int] =
    var retFuture = newFuture[int]("callback1")

    echo "Callback1: Waiting"
    sleep(3000)
    retFuture.complete(10)    
    return retFuture

proc callback2(): Future[int] =
    var retFuture = newFuture[int]("callback2")

    echo "Callback2: Waiting"
    sleep(3000)
    if 0.7 < 0.5:
        retFuture.complete(5)
    else:
        retFuture.fail(newException(OSError, "Error occured"))

    return retFuture

proc main() {.async.} =
    try:
        var value = await callback1()
        var value2 = await callback2()
        echo value * value2
    except:
        echo "Operation Failed"



waitFor main()