Scheme Unicode identifiers

gistfile1.cs

private static bool IsLetterOrUnicodeSchemeIdentifier(char num)
{
  if (num < '\x0080')
  {
    return char.IsLetter(num);
  }
  switch (char.GetUnicodeCategory(num))
  {
    case UnicodeCategory.UppercaseLetter:
    case UnicodeCategory.LowercaseLetter:
    case UnicodeCategory.TitlecaseLetter:
    case UnicodeCategory.ModifierLetter:
    case UnicodeCategory.OtherLetter:
    case UnicodeCategory.NonSpacingMark:
    case UnicodeCategory.SpacingCombiningMark:
    case UnicodeCategory.EnclosingMark:
    case UnicodeCategory.DecimalDigitNumber:
    case UnicodeCategory.LetterNumber:
    case UnicodeCategory.OtherNumber:
    case UnicodeCategory.PrivateUse:
    case UnicodeCategory.ConnectorPunctuation:
    case UnicodeCategory.DashPunctuation:
    case UnicodeCategory.OtherPunctuation:
    case UnicodeCategory.MathSymbol:
    case UnicodeCategory.CurrencySymbol:
    case UnicodeCategory.ModifierSymbol:
    case UnicodeCategory.OtherSymbol:
      return true;
  }
  return false;
}