Closed
Description
For classes with a single constructor that takes in a few values.
class User {
final String firstName;
final String lastName;
User({@required this.firstName, @required this.lastName});
}It would be much cleaner and concise to simply allow a "primary constructor":
class User({@required this.firstName, @required this.lastName}) {
final String firstName;
final String lastName;
}Duplicating constructor and class declaration seems a little clunky. When we have more fields,
this duplication is further known and wish we could take it a step further to allow:
class User({@required final String firstName, @required final String lastName});Less duplication in code will lead to nice details in our widgets for flutter like from this:
class AppDetails extends StatefulWidget {
final String url;
final String jobName;
AppDetails({@required this.url, @required this.jobName});
@override
AppDetailsState createState() => new AppDetailsState(this.url, initialJobName: jobName);
}
class AppDetailsState extends State<AppDetails> {
String selectedJobName;
final String jobUrl;
AppDetailsState(this.jobUrl, {@required String initialJobName}) {
this.selectedJobName = initialJobName;
}
// state implementation below
}to this:
class AppDetails({@required final String url, @required final String jobName})
extends StatefulWidget {
@override
AppDetailsState createState() => new AppDetailsState(this.url, initialJobName: jobName);
}
class AppDetailsState(final String jobUrl, {@required String initialJobName})
extends State<AppDetails> {
// state implementation belowfrom 17 lines of boilerplate to 8.