Map from optional arguments

[duzenko]

It's tedious to manually construct Map instances for JSON serialization from primitive types. Would be great to have some syntax sugar like this

void callApi({
  String? a,
  String? b,
  String? c,
}) {
  final params = <String, dynamic>{
    'a': a,
    'b': b,
    'c': c,
  };
  print(params);
}

void callApi_proposal({
  String? a,
  String? b,
  String? c,
}) {
  print($optionals); // $optionals is all optional parameters as a Map<String, dynamic>
}

[ykmnkmi]

my suggestion:

void call({String? a, String? b, Map<String, Object?> **params}) {
  print({'a': a, 'b': b, ...params});
}

also same for positional:

void call(String value, [List<String> *params]);