falcon

Rules / Style / empty-constructor-bodies

empty-constructor-bodies

lint/style/empty-constructor-bodies
recommended
Same as empty_constructor_bodies · Dart lints

Flags constructors with an empty block body {}.

An empty {} is indistinguishable from a body someone forgot to fill in, whereas a bare ; states plainly that the constructor does no extra work. Prefer Foo(); over Foo() {}. Only a block body containing no statements is reported; a constructor whose body does something is left alone.

Invalid

example.dartdart
class A {
  A() {}
}

class B {
  final int x;
  B(this.x) {}
}

class C {
  C.named() {}
}

class D {
  int y = 0;
  D() : y = 1 {}
}

class E {
  E.first() {}
  E.second() {}
}
Empty constructor body — use `;` instead of `{}`
1class A {
2 A() {}
Empty constructor body — use `;` instead of `{}`
6 final int x;
7 B(this.x) {}
Empty constructor body — use `;` instead of `{}`
10class C {
11 C.named() {}
Empty constructor body — use `;` instead of `{}`
15 int y = 0;
16 D() : y = 1 {}
Empty constructor body — use `;` instead of `{}`
19class E {
20 E.first() {}
Empty constructor body — use `;` instead of `{}`
20 E.first() {}
21 E.second() {}

Valid

example.dartdart
class A {
  A();
}

class B {
  final int x;
  B(this.x);
}

class C {
  C.named();
}

class D {
  int y = 0;
  D() : y = 1;
}

class E {
  E() {
    print('init');
  }
}

class F {
  final int z;
  F(this.z) {
    print(z);
  }
}

How to configure

Set the severity of empty-constructor-bodies in your falcon.json:

falcon.jsonjson
{
  "linter": {
    "rules": {
      "style": {
        "empty-constructor-bodies": "error"
      }
    }
  }
}

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