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8532 :: asyncmacro.nim(130, 3) Error: 'yield' only allowed in an iterator

• tzzza (orginal) [2021-10-23T21:06:09+02:00] view original

  Tried to make this example code:

  import asyncdispatch, ws
  
  var wsc = await newWebSocket("ws://ws.ifelse.io")
  echo await wsc.receiveStrPacket()
  await wsc.send("Hi, how are you?")
  echo await wsc.receiveStrPacket()
  wsc.close()
  Run

  got:

  nim-1.6.0\\examples\\example1.nim(3, 17) template/generic instantiation of `await` from here
  nim-1.6.0\\lib\\pure\\asyncmacro.nim(130, 3) Error: 'yield' only allowed in an iterator

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• hamidrb80 (orginal) [2021-10-23T21:14:50+02:00] view original

  hey, you probably know that await transforms to some block of code that contains yield;

  you can use await only in a proc that has async pragma.

  the possible solution here is using waitfor INSTEAD of await when you're not in an async proc

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• DavideGalilei (orginal) [2021-10-23T21:16:01+02:00] view original

  This is because you are trying to use await in a non-async context. You should wrap your code into an async main procedure, like this: https://play.nim-lang.org/#ix=3CBN

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• hamidrb80 (orginal) [2021-10-23T21:18:09+02:00] view original

  https://peterme.net/asynchronous-programming-in-nim.html

  is a good place to start writing async code in nim

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• tzzza (orginal) [2021-10-25T12:14:20+02:00] view original

  Thanx guys, you solved my problem. I am new to all of this and have much to learn.

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