main.dart

import 'dart:async';
import 'dart:io';

void main() async {
    try {
        await Directory('temp').create();
        await File('temp/temp').create();
    } catch(e){
    }

}


Future<String> completerDemo(){
    var completer = new Completer<String>();

    Timer(Duration(milliseconds: 300), (){
        completer.complete('test');
    });

    completer.future;
}

void testFutureOr(){
    doStuff((i) => '12312');
    doStuff((i) async {
        return await 'terer';
    });
}


typedef FutureOr<String> myTypeDef(int a);

void doStuff(myTypeDef d) async{
    await d(12);
}



Future oldApproach(){
    return Directory('temp').create().then((d){
        return File('temp/teps').create();
    }).catchError((e){
        print("error is $e");
    });
}