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4c20cedd30
Now that I'm able to open the entire SDK in VSC, I'm fixing some of the analysis issues in various files (carefully) without changing their meaning. In this case, I removed unnecessary imports from benchmarks. In regexp_benchmark I ignored one warning which likely would have changed the behavior of the code. BUG=https://github.com/dart-lang/sdk/issues/52419 Change-Id: I9a195a4e45121313bd9f065f2579a165c3fec05b Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/303901 Auto-Submit: Eric Seidel <eric@shorebird.dev> Reviewed-by: William Hesse <whesse@google.com> Commit-Queue: William Hesse <whesse@google.com>
25 lines
918 B
Dart
25 lines
918 B
Dart
/// Marker interface for [Iterable] subclasses that have an efficient
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/// [length] implementation.
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abstract class EfficientLengthIterable<T> extends Iterable<T> {
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const EfficientLengthIterable();
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/// Returns the number of elements in the iterable.
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///
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/// This is an efficient operation that doesn't require iterating through
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/// the elements.
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@override
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int get length;
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}
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/// Creates errors throw by [Iterable] when the element count is wrong.
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abstract class IterableElementError {
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/// Error thrown by, e.g., [Iterable.first] when there is no result.
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static StateError noElement() => StateError('No element');
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/// Error thrown by, e.g., [Iterable.single] if there are too many results.
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static StateError tooMany() => StateError('Too many elements');
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/// Error thrown by, e.g., [List.setRange] if there are too few elements.
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static StateError tooFew() => StateError('Too few elements');
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}
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