Example async dart code not working

Question

Every example of async code I have tried in Dart, mostly from their site does not seem to work for me.

import 'dart:io';

main() async {
  var socket = await Socket.connect('127.0.0.1', 4041);
  print(socket.runtimeType);
  socket.write('Hello, World!');
}

Example code from their cookbook

And it throws me

error: line 3 pos 1: unexpected token 'main'
main() async {

I think its looking for a return type for the function? But I can't find any kind of documentmentation where you can tell what it is looking for, thanks for the help!

My dart says its version is 1.5.3 I run the install as choco install dart-sdk -version 1.18.1 — Icallitvera
– Icallitvera, Commented Aug 22, 2016 at 22:59

Argenti Apparatus · Accepted Answer · 2016-08-23 00:47:32Z

3

Dart asynchrony support (async, await etc.) came in version 1.9. You need to update your SDK.

Presumably your update did not work. Try choco upgrade dart-sdk. Or you may have to uninstall then re-install the latest version.

answered Aug 23, 2016 at 0:47

Argenti Apparatus

4,0512 gold badges27 silver badges35 bronze badges

Sign up to request clarification or add additional context in comments.

2 Comments

Icallitvera Over a year ago

Yup, thanks I ended up using the unofficial install method and it seemed to isntall the correct version, I installed it like yesterday, and I checked the version file in the dart-sdk folder and it said 1.18.2, not sure what messed up, thanks for the clarification on version numbers

Argenti Apparatus Over a year ago

You may have had the current sdk and an older one installed, The older one being run when you invoked dart.exe. Which is whydart.exe --version printed 1.5.3 even though the version file you checked indicated 1.18.2.

Collectives™ on Stack Overflow

Example async dart code not working

1 Answer 1

2 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

2 Comments

Your Answer

Sign up or log in

Post as a guest

Related