AjScript.Interpreter.Lexer.NextString C# (CSharp) Метод

        private Token NextString()
        {
            StringBuilder sb = new StringBuilder();
            char? nch;
            char lastChar = (char)0;

            nch = this.NextChar();

            while ((nch.HasValue && nch.Value != StringChar) || lastChar == '\\')
            {
                char ch = nch.Value;

                if (lastChar == '\\')
                {
                    switch (ch)
                    {
                        case 't':
                            sb.Length--;
                            sb.Append('\t');
                            break;
                        case 'a':
                            sb.Length--;
                            sb.Append('\a');
                            break;
                        case 'b':
                            sb.Length--;
                            sb.Append('\b');
                            break;
                        case 'e':
                            sb.Length--;
                            sb.Append((char)27);
                            break;
                        case 'f':
                            sb.Length--;
                            sb.Append('\f');
                            break;
                        case 'n':
                            sb.Length--;
                            sb.Append('\n');
                            break;
                        case 'r':
                            sb.Length--;
                            sb.Append('\r');
                            break;
                        case 'v':
                            sb.Length--;
                            sb.Append('\v');
                            break;
                        case '\\':
                            break;
                        default:
                            sb.Length--;
                            sb.Append(ch);
                            break;
                    }

                    lastChar = (char)0;
                }
                else
                {
                    sb.Append(ch);
                    lastChar = ch;
                }

                nch = this.NextChar();
            }

            Token token = new Token();
            token.Value = sb.ToString();
            token.TokenType = TokenType.String;

            return token;
        }