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avoid-unnecessary-constructor

added in: 1.22.0
style
🛠
Pro+

Suggests removing an unnecessary empty constructor for enum and class declarations.

In Dart, classes and enums always have an implicit default constructor and declaring it explicitly is usually unnecessary.

Example​

❌ Bad:

class SomeClass {
  final values = <int>{};

  SomeClass(); // LINT: This constructor is unnecessary. Try removing it.
}

enum MyEnum {
  alpha,
  beta,
  gama;

  const MyEnum(); // LINT: This constructor is unnecessary. Try removing it.
}

✅ Good:

class SomeClass {
  final values = <int>{};
}

enum MyEnum {
  alpha,
  beta,
  gama;
}