mirror of https://github.com/ppy/osu
15d9147edd
The previous implementation of `SampleInfo`'s equality members was not completely correct in its treatment of the `sampleNames` array. While `Equals()` compared the values of `sampleNames` using `SequenceEqual()`, therefore performing a structural check that inspects the contents of both arrays, `GetHashCode()` used `HashCode.Combine()` directly on the arrays, therefore operating on reference equality. This could cause the pooling mechanism of samples to fail, as pointed out in #11079. To resolve, change the `GetHashCode()` implementation such that it also considers the contents of the array rather than just the reference to the array itself. This is achieved by leveraging `StructuralEqualityComparer`. Additionally, as a bonus, an array sort was added to the constructor of `SampleInfo`. This is intended to be a "canonicalisation" processing step for the array of sample names. Thanks to that sort, two instances of `SampleInfo` that have the same sample names but permutated will also turn out to be equal and have the same hash codes, given the implementation of both equality members. This gives `SampleInfo` set-like semantics. |
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| .. | ||
| HitSampleInfo.cs | ||
| IPreviewTrackOwner.cs | ||
| ISampleInfo.cs | ||
| PreviewTrack.cs | ||
| PreviewTrackManager.cs | ||
| SampleInfo.cs | ||