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Code Issues 975 Packages Projects Releases 25 Wiki Activity

clean up lazy readonly collections and add tests

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This commit is contained in:
Adam Hathcock
2026-01-13 16:39:55 +00:00
parent 4fa976b478
commit ca4cf25a1f
4 changed files with 783 additions and 43 deletions
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40
src/SharpCompress/LazyAsyncReadOnlyCollection.cs
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@@ -10,23 +10,23 @@ namespace SharpCompress;
internal sealed class LazyAsyncReadOnlyCollection<T>(IAsyncEnumerable<T> source)
: IAsyncEnumerable<T>
{
private readonly List<T> backing = new();
private readonly IAsyncEnumerator<T> source = source.GetAsyncEnumerator();
private bool fullyLoaded;
private readonly List<T> _backing = new();
private readonly IAsyncEnumerator<T> _source = source.GetAsyncEnumerator();
private bool _fullyLoaded;
private class LazyLoader(
LazyAsyncReadOnlyCollection<T> lazyReadOnlyCollection,
CancellationToken cancellationToken
) : IAsyncEnumerator<T>
{
private bool disposed;
private int index = -1;
private bool _disposed;
private int _index = -1;
public ValueTask DisposeAsync()
{
if (!disposed)
if (!_disposed)
{
disposed = true;
_disposed = true;
}
return default;
}
@@ -34,27 +34,27 @@ internal sealed class LazyAsyncReadOnlyCollection<T>(IAsyncEnumerable<T> source)
public async ValueTask<bool> MoveNextAsync()
{
cancellationToken.ThrowIfCancellationRequested();
if (index + 1 < lazyReadOnlyCollection.backing.Count)
if (_index + 1 < lazyReadOnlyCollection._backing.Count)
{
index++;
_index++;
return true;
}
if (
!lazyReadOnlyCollection.fullyLoaded
&& await lazyReadOnlyCollection.source.MoveNextAsync()
!lazyReadOnlyCollection._fullyLoaded
&& await lazyReadOnlyCollection._source.MoveNextAsync()
)
{
lazyReadOnlyCollection.backing.Add(lazyReadOnlyCollection.source.Current);
index++;
lazyReadOnlyCollection._backing.Add(lazyReadOnlyCollection._source.Current);
_index++;
return true;
}
lazyReadOnlyCollection.fullyLoaded = true;
lazyReadOnlyCollection._fullyLoaded = true;
return false;
}
#region IEnumerator<T> Members
public T Current => lazyReadOnlyCollection.backing[index];
public T Current => lazyReadOnlyCollection._backing[_index];
#endregion
@@ -62,9 +62,9 @@ internal sealed class LazyAsyncReadOnlyCollection<T>(IAsyncEnumerable<T> source)
public void Dispose()
{
if (!disposed)
if (!_disposed)
{
disposed = true;
_disposed = true;
}
}
@@ -73,18 +73,18 @@ internal sealed class LazyAsyncReadOnlyCollection<T>(IAsyncEnumerable<T> source)
internal async ValueTask EnsureFullyLoaded()
{
if (!fullyLoaded)
if (!_fullyLoaded)
{
var loader = new LazyLoader(this, CancellationToken.None);
while (await loader.MoveNextAsync())
{
// Intentionally empty
}
fullyLoaded = true;
_fullyLoaded = true;
}
}
internal IEnumerable<T> GetLoaded() => backing;
internal IEnumerable<T> GetLoaded() => _backing;
#region ICollection<T> Members