/// <summary>
/// Creates an array from the contents of this builder.
/// </summary>
/// <remarks>
/// Do not call this method twice on the same builder.
/// </remarks>
public T[] ToArray()
{
if (Count == 0)
{
return(ArrayEx.Empty <T>());
}
Debug.Assert(Buffer != null); // Nonzero _count should imply this
var result = Buffer;
if (Count < result.Length)
{
// Avoid a bit of overhead (method call, some branches, extra code-gen)
// which would be incurred by using Array.Resize
result = new T[Count];
Array.Copy(Buffer, 0, result, 0, Count);
}
#if DEBUG
// Try to prevent callers from using the ArrayBuilder after ToArray, if _count != 0.
Count = -1;
Buffer = null;
#endif
return(result);
}
/// <summary>
/// Initializes the <see cref="ArrayBuilder{T}" /> with a specified capacity.
/// </summary>
/// <param name="capacity">The capacity of the array to allocate.</param>
public ArrayBuilder(int capacity)
: this()
{
Debug.Assert(capacity >= 0);
if (capacity > 0)
{
Buffer = new T[capacity];
}
else
{
Buffer = ArrayEx.Empty <T>();
}
}
/// <summary>
/// Creates an array from the contents of this builder.
/// </summary>
/// <remarks>
/// Do not call this method twice on the same builder.
/// </remarks>
public T[] ToArray()
{
if (Count == 0)
{
return(ArrayEx.Empty <T>());
}
if (Count == Buffer.Length)
{
return(Buffer);
}
// Avoid a bit of overhead (method call, some branches, extra code-gen)
// which would be incurred by using Array.Resize
var result = new T[Count];
Array.Copy(Buffer, 0, result, 0, Count);
return(result);
}
protected HashSet(SerializationInfo info, StreamingContext context)
: this()
{
if (info == null)
{
throw new ArgumentNullException(nameof(info));
}
No.Op(context);
var dictionary = (info.GetValue("dictionary", typeof(KeyValuePair <T, object?>[])) as KeyValuePair <T, object?>[]) ?? ArrayEx.Empty <KeyValuePair <T, object?> >();
var comparer = info.GetValue("comparer", typeof(IEqualityComparer <T>)) ?? EqualityComparer <T> .Default;
_wrapped = new NullAwareDictionary <T, object?>(dictionary, comparer);
}