Jurassic.Compiler.Lexer.IsIdentifierChar C# (CSharp) Method

        private static bool IsIdentifierChar(int c)
        {
            UnicodeCategory cat = char.GetUnicodeCategory((char)c);
            return c == '$' || c == '\\' ||
                cat == UnicodeCategory.UppercaseLetter ||
                cat == UnicodeCategory.LowercaseLetter ||
                cat == UnicodeCategory.TitlecaseLetter ||
                cat == UnicodeCategory.ModifierLetter ||
                cat == UnicodeCategory.OtherLetter ||
                cat == UnicodeCategory.LetterNumber ||
                cat == UnicodeCategory.NonSpacingMark ||
                cat == UnicodeCategory.SpacingCombiningMark ||
                cat == UnicodeCategory.DecimalDigitNumber ||
                cat == UnicodeCategory.ConnectorPunctuation ||
                c == 0x200C ||  // Zero-width non-joiner.
                c == 0x200D;    // Zero-width joiner.
        }