/// <summary>
/// Fast path for concatenating sane-sized arrays, we assume size has been calculated.
/// </summary>
internal void CopyValues(ArrayInstance source, uint sourceStartIndex, uint targetStartIndex, uint length)
{
if (length == 0)
{
return;
}
var sourceDense = source._dense;
if (sourceDense is not null)
{
EnsureCapacity((uint)sourceDense.LongLength);
}
var dense = _dense;
if (dense != null && sourceDense != null &&
(uint)dense.Length >= targetStartIndex + length &&
dense[targetStartIndex] is null)
{
uint j = 0;
for (uint i = sourceStartIndex; i < sourceStartIndex + length; ++i, j++)
{
var sourcePropertyDescriptor = i < (uint)sourceDense.Length && sourceDense[i] != null
? sourceDense[i]
: source.GetProperty(i);
dense[targetStartIndex + j] = sourcePropertyDescriptor?._value is not null
? new PropertyDescriptor(sourcePropertyDescriptor._value, PropertyFlag.ConfigurableEnumerableWritable)
: null;
}
}
