package_api_docs

Provide doc comments for all public APIs.

This rule is available as of Dart 2.0.0.

DO provide doc comments for all public APIs.

As described in the pub package layout doc, public APIs consist in everything in your package's lib folder, minus implementation files in lib/src, adding elements explicitly exported with an export directive.

For example, given lib/foo.dart:

export 'src/bar.dart' show Bar;
export 'src/baz.dart';

class Foo { }

class _Foo { }

its API includes:

• Foo (but not _Foo)
• Bar (exported) and
• all public elements in src/baz.dart

All public API members should be documented with /// doc-style comments.

BAD:

class Bar {
  void bar();
}

GOOD:

/// A Foo.
abstract class Foo {
  /// Start foo-ing.
  void start() => _start();

  _start();
}

Advice for writing good doc comments can be found in the Doc Writing Guidelines.

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

linter:
  rules:
    - package_api_docs