ReadOnlySequenceDebugView.cs

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using System.Diagnostics;
 
namespace System.Buffers;
 
internal sealed class ReadOnlySequenceDebugView<T>
{
    [DebuggerDisplay("Count: {Segments.Length}", Name = "Segments")]
    public struct ReadOnlySequenceDebugViewSegments
    {
        [DebuggerBrowsable(DebuggerBrowsableState.RootHidden)]
        public ReadOnlyMemory<T>[] Segments { get; set; }
    }
 
    private readonly T[] _array;
 
    private readonly ReadOnlySequenceDebugViewSegments _segments;
 
    public ReadOnlySequenceDebugViewSegments BufferSegments => _segments;
 
    [DebuggerBrowsable(DebuggerBrowsableState.RootHidden)]
    public T[] Items => _array;
 
    public ReadOnlySequenceDebugView(ReadOnlySequence<T> sequence)
    {
        _array = BuffersExtensions.ToArray(in sequence);
        int num = 0;
        ReadOnlySequence<T>.Enumerator enumerator = sequence.GetEnumerator();
        while (enumerator.MoveNext())
        {
            ReadOnlyMemory<T> current = enumerator.Current;
            num++;
        }
        ReadOnlyMemory<T>[] array = new ReadOnlyMemory<T>[num];
        int num2 = 0;
        ReadOnlySequence<T>.Enumerator enumerator2 = sequence.GetEnumerator();
        while (enumerator2.MoveNext())
        {
            ReadOnlyMemory<T> current2 = enumerator2.Current;
            array[num2] = current2;
            num2++;
        }
        _segments = new ReadOnlySequenceDebugViewSegments
        {
            Segments = array
        };
    }
}