BACnet.SchemaParser.Lexer._readSymbolString C# (CSharp) Метод

        private string _readSymbolString()
        {
            Func<char, bool> isSymbol = (c => Char.IsSymbol(c) || Char.IsPunctuation(c));
            string s = string.Empty;
            while(!_eof() && isSymbol(_peekChar()))
            {
                s += _readChar();
                if (_symbolTypes.ContainsKey(s) && (_eof() || !_symbolTypes.ContainsKey(s + _peekChar())))
                    break;
            }
            return s;
        }