25 lines
1.2 KiB
Dart
25 lines
1.2 KiB
Dart
import 'dart:async';
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/// Explicitly ignores a future.
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///
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/// Not all futures need to be awaited.
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/// The Dart linter has an optional ["unawaited futures" lint](https://dart-lang.github.io/linter/lints/unawaited_futures.html)
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/// which enforces that futures (expressions with a static type of [Future])
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/// in asynchronous functions are handled *somehow*.
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/// If a particular future value doesn't need to be awaited,
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/// you can call `unawaited(...)` with it, which will avoid the lint,
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/// simply because the expression no longer has type [Future].
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/// Using `unawaited` has no other effect.
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/// You should use `unawaited` to convey the *intention* of
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/// deliberately not waiting for the future.
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///
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/// If the future completes with an error,
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/// it was likely a mistake to not await it.
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/// That error will still occur and will be considered unhandled
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/// unless the same future is awaited (or otherwise handled) elsewhere too.
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/// Because of that, `unawaited` should only be used for futures that
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/// are *expected* to complete with a value.
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void unawaited(Future<void> future) {}
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void nullableTest<R>(Stream<R> Function(Stream<String?> s) transform) =>
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transform(Stream<String>.fromIterable(['1', '2', '3']));
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