Analyzer isn't working in Visual Studio Code … or is it?

Issue

In Visual Studio Code, no errors seem to arise when an @required parameter is omitted when invoking a Dart function. Do I have to do something to get the analyzer working? Or are errors being flagged and I’m just not seeing them? Any help would be appreciated …

import 'package:meta/meta.dart';

void sayHello({@required String to, bool inEnglish}){

  if(inEnglish == null || inEnglish){
    print("Hello, $to");
  } else {
    print("Bonjour, $to");
  }
}

main(){
 sayHello(inEnglish: true); // output: Hello, null, no complaints about **to** missing
}

Solution

The Dart language has required positional parameters, optional positional parameters, and optional named parameters. Sadly, Dart has no support for required named parameters.

The @required annotation doesn’t actually do anything. It’s just a workaround added by Flutter that the analyzer can use to add a warning when you don’t pass a parameter that is marked with it. But it won’t prevent you from omitting the “required” parameter, and code that does so will still compile and run perfectly well.

Answered By – Abion47

Answer Checked By – Jay B. (FlutterFixes Admin)

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