/// <summary>
/// Creates a string from the rope. Runs in O(N).
/// </summary>
/// <returns>A string consisting of all elements in the rope as comma-separated list in {}.
/// As a special case, Rope<char> will return its contents as string without any additional separators or braces,
/// so it can be used like StringBuilder.ToString().</returns>
/// <remarks>
/// This method counts as a read access and may be called concurrently to other read accesses.
/// </remarks>
public override string ToString()
{
Rope <char> charRope = this as Rope <char>;
if (charRope != null)
{
return(charRope.ToString(0, this.Length));
}
else
{
StringBuilder b = new StringBuilder();
foreach (T element in this)
{
if (b.Length == 0)
{
b.Append('{');
}
else
{
b.Append(", ");
}
b.Append(element.ToString());
}
b.Append('}');
return(b.ToString());
}
}
/// <summary>
/// Gets the index of the last occurrence of the search text.
/// </summary>
public static int LastIndexOf(this Rope <char> rope, string searchText, int startIndex, int length, StringComparison comparisonType)
{
if (rope == null)
{
throw new ArgumentNullException("rope");
}
if (searchText == null)
{
throw new ArgumentNullException("searchText");
}
rope.VerifyRange(startIndex, length);
int pos = rope.ToString(startIndex, length).LastIndexOf(searchText, comparisonType);
if (pos < 0)
{
return(-1);
}
else
{
return(pos + startIndex);
}
}
