namespace System {
#pragma warning disable CS1591 // O comentário XML ausente não foi encontrado para o tipo ou membro visível publicamente
    public static class Char_CB_Extension {
        public static sbyte ToSByte(this char c)
            => Convert.ToSByte(c);
#pragma warning restore CS1591 // O comentário XML ausente não foi encontrado para o tipo ou membro visível publicamente

        /// <summary>
        /// Method that interprets a char value.
        /// </summary>
        /// <returns>The method returns a value of type <see cref="EscapeSequence"/> representing the type of escape sequence.</returns>
        public static EscapeSequence InterpretEscapeSequence(this char c) {
            switch (c) {
                case '\'':return EscapeSequence.SingleQuote;
                case '\"':return EscapeSequence.DoubleQuote;
                case '\\':return EscapeSequence.BackSlash;
                case '\0':return EscapeSequence.Null;
                case '\a':return EscapeSequence.Alert;
                case '\b':return EscapeSequence.Backspace;
                case '\f':return EscapeSequence.FormFeed;
                case '\n':return EscapeSequence.NewLine;
                case '\r':return EscapeSequence.CarriageReturn;
                case '\t':return EscapeSequence.HorizontalTab;
                case '\v':return EscapeSequence.VerticalTab;
                default: return EscapeSequence.None;
            }  
        }

        /// <summary>
        /// Method that interprets a char value.
        /// </summary>
        /// <returns>The method returns a value of type <see cref="EscapeSequence"/> representing the type of escape sequence.
        /// <para>The return is converted to a <see cref="string"/>.</para>
        /// </returns>
        public static string EscapeSequenceToString(this char c) {
            switch (InterpretEscapeSequence(c)) {
                case EscapeSequence.SingleQuote: return @"\'";
                case EscapeSequence.DoubleQuote: return "\\\"";
                case EscapeSequence.BackSlash: return @"\\";
                case EscapeSequence.Null: return @"\0";
                case EscapeSequence.Alert: return @"\a";
                case EscapeSequence.Backspace: return @"\b";
                case EscapeSequence.FormFeed: return @"\f";
                case EscapeSequence.NewLine: return @"\n";
                case EscapeSequence.CarriageReturn: return @"\r";
                case EscapeSequence.HorizontalTab: return @"\t";
                case EscapeSequence.VerticalTab: return @"\v";
                default: return c.ToString();
            }
        }
    }
}