/// <summary>
/// Visits a JSON expression tree array node.
/// </summary>
/// <param name="node">JSON expression tree array node to visit.</param>
/// <returns>Copy of the expression tree node.</returns>
public override Expression VisitArray(ArrayExpression node)
{
if (node == null)
{
throw new ArgumentNullException(nameof(node));
}
var elements = default(Expression[]);
var n = node.ElementCount;
for (var i = 0; i < n; i++)
{
var oldElement = node.GetElement(i);
var newElement = Visit(oldElement);
if (elements != null)
{
elements[i] = newElement;
}
else
{
if (oldElement != newElement)
{
elements = new Expression[n];
for (var j = 0; j < i; j++)
{
elements[j] = node.GetElement(j);
}
elements[i] = newElement;
}
}
}
if (elements != null)
{
return(Expression.Array(elements));
}
return(node);
}