/// <summary>
/// Returns the index that is offset <paramref name="codePointOffset"/> code points from
/// <paramref name="index"/>.
/// </summary>
/// <param name="text">This <see cref="StringBuilder"/>.</param>
/// <param name="index">The index to calculate the offset from.</param>
/// <param name="codePointOffset">The number of code points to count.</param>
/// <returns>The index that is <paramref name="codePointOffset"/> code points away from <paramref name="index"/>.</returns>
/// <seealso cref="Character"/>
/// <seealso cref="Character.OffsetByCodePoints(char[], int, int, int, int)"/>
public static int OffsetByCodePoints(this StringBuilder text, int index, int codePointOffset)
{
var chars = text.GetChars();
return(Character.OffsetByCodePoints(chars, 0, chars.Length, index,
codePointOffset));
}
public static int OffsetByCodePoints(this string seq, int index,
int codePointOffset)
{
return(Character.OffsetByCodePoints(seq, index, codePointOffset));
}