playing with async-await

main.dart

import 'dart:async';

Future<void> f() async {
  print('1: before await');
  await null;
  print('2: after await');
}

// 3: before f()
// 1: before await
// 4: after f()
// 2: after await
// Future<void> main() async {
Future<void> withoutAwait() async {
  print('3: before f()');
  f();
  print('4: after f()');
}

// 5: before await f()
// 1: before await
// 2: after await
// 6: after await f()
// Future<void> main() async {
Future<void> withAwait() async {
  print('5: before await f()');
  await f();
  print('6: after await f()');
}

// 7: before calling withoutAwait
// 
// 3: before f()
// 1: before await
// 4: after f()
// 
// 8: after calling withoutAwait
//
// 5: before await f()
// 1: before await
// 
// 9: after calling withAwait
//
// 2: after await
// 2: after await
// 6: after await f()
main() async { // NO AWAITS
  print('7: before calling withoutAwait\n');
  withoutAwait();
  print('\n8: after calling withoutAwait\n');
  withAwait();
  print('\n9: after calling withAwait\n');
}

// 7: before calling withoutAwait
// 
// 3: before f()
// 1: before await
// 4: after f()
// 2: after await
// 
// 8: after calling withoutAwait
//
// 5: before await f()
// 1: before await
// 2: after await
// 6: after await f()
// 
// 9: after calling withAwait
// main() async { // WITH AWAITS
//   print('7: before calling withoutAwait\n');
//   await withoutAwait();
//   print('\n8: after calling withoutAwait\n');
//   await withAwait();
//   print('\n9: after calling withAwait\n');
// }