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Summary

df_safer_dart_annotations provides the marker annotations consumed by the df_safer_dart_lints plugin and re-exported by df_safer_dart. This package has no runtime behaviour — each annotation is an empty const class whose name is what the lint plugin matches on.

Every annotation comes in two forms:

• the bare name (@noFutures, @unsafe, …) — reported by the analyzer as a warning, so existing code can migrate incrementally.
• the *OrError suffix (@noFuturesOrError, @unsafeOrError, …) — reported as an error that blocks the build.

Annotations

Annotation	Use it on…	The lint stops…
@noFutures	functions / closures	async, await, or any Future-typed expression inside the body
@mustAwaitAllFutures	functions / closures	Futures produced and then dropped as bare statements
@mustBeAnonymous	function parameters	callers passing a named function reference instead of an inline lambda
@mustBeStrongRef	function parameters	callers passing an inline function literal where a long-lived reference is required. Top-level functions, static methods, and instance-method tear-offs are accepted (weak-listener pattern)
@mustHandleReturn	functions / methods	callers discarding the return value
@unsafe / @unsafeOrError	functions / methods	callers invoking unsafe API outside an UNSAFE(() => ...) block
@experimental1/2/3	anything	(informational — used by tooling to flag early-stage API)

Installation

dart pub add df_safer_dart_annotations

Most projects don't depend on this directly — they depend on df_safer_dart, which re-exports it. Use this package directly only if you want the annotations without pulling the full Outcome stack.

Example

import 'package:df_safer_dart_annotations/df_safer_dart_annotations.dart';

@noFutures
int synchronousCalculation(int a, int b) {
  // Adding `await Future.delayed(...)` here would fire `no_futures`.
  return a + b;
}

@mustHandleReturnOrError
String whatIsYourName() => 'Tony';

void main() {
  // OK — return value used.
  final name = whatIsYourName();
  print(name);

  // Would fire `must_handle_return_or_error`:
  // whatIsYourName();
}

For the rule semantics see the df_safer_dart_lints README and its fixture suite. For the full Outcome / Result / Resolvable ecosystem see df_safer_dart.

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🔍 For more information, refer to the API reference.

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💬 Contributing and Discussions

This is an open-source project, and we warmly welcome contributions from everyone, regardless of experience level. Whether you're a seasoned developer or just starting out, contributing to this project is a fantastic way to learn, share your knowledge, and make a meaningful impact on the community.

☝️ Ways you can contribute

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No matter how you choose to contribute, your involvement is greatly appreciated and valued!

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LICENSE

This project is released under the MIT License. See LICENSE for more information.