unnecessary_constructor_name

Unnecessary .new constructor name.

This rule is available as of Dart 2.15.

Rule sets: recommended, flutter

This rule has a quick fix available.

PREFER using the default unnamed Constructor over .new.

Given a class C, the named unnamed constructor C.new refers to the same constructor as the unnamed C. As such it adds nothing but visual noise to invocations and should be avoided (unless being used to identify a constructor tear-off).

BAD:

class A {
  A.new(); // LINT
}

var a = A.new(); // LINT

GOOD:

class A {
  A.ok();
}

var a = A();
var aa = A.ok();
var makeA = A.new;

To enable the unnecessary_constructor_name rule, add unnecessary_constructor_name under linter > rules in your analysis_options.yaml file:

linter:
  rules:
    - unnecessary_constructor_name

Unless stated otherwise, the documentation on this site reflects Dart 3.5.4. Page last updated on 2024-07-03. View source or report an issue.