/// <summary>
        /// Parse the given line.
        /// </summary>
        /// <param name="line">The line to parse.</param>
        /// <returns>The parsed probability.</returns>
        public ParsedProbability Parse(String line)
        {
            ParsedProbability result = new ParsedProbability();

            SimpleParser parser = new SimpleParser(line);

            parser.EatWhiteSpace();
            if (!parser.LookAhead("P(", true))
            {
                throw new EncogError("Bayes table lines must start with P(");
            }
            parser.Advance(2);

            // handle base
            AddEvents(parser, result.BaseEvents, "|,)=[]");

            // handle conditions
            if (parser.Peek() == '|')
            {
                parser.Advance();
                AddEvents(parser, result.GivenEvents, ",)=[]");
            }

            if (parser.Peek() != ')')
            {
                throw new BayesianError("Probability not properly terminated.");
            }

            return(result);
        }
        /// <summary>
        /// Parse parameters.
        /// </summary>
        ///
        /// <param name="line">The line to parse.</param>
        /// <returns>The parsed values.</returns>
        public static IDictionary <String, String> ParseParams(String line)
        {
            IDictionary <String, String> result = new Dictionary <String, String>();

            var parser = new SimpleParser(line);

            while (!parser.EOL())
            {
                String name = ParseName(parser)
                              .ToUpper();

                parser.EatWhiteSpace();
                if (!parser.LookAhead("=", false))
                {
                    throw new EncogError("Missing equals(=) operator.");
                }
                parser.Advance();

                String v = ParseValue(parser);

                result[name.ToUpper()] = v;

                if (!parser.ParseThroughComma())
                {
                    break;
                }
            }

            return(result);
        }
Exemple #3
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        /// <summary>
        ///     Read the specified parameter.
        /// </summary>
        /// <param name="parser">The parser to use.</param>
        /// <returns>The parsed parameter.</returns>
        private ParamTemplate ReadParam(SimpleParser parser)
        {
            var result = new ParamTemplate();

            if (!parser.LookAhead("{", true))
            {
                throw new EACompileError("Expected {");
            }
            parser.Advance();

            bool done   = false;
            var  buffer = new StringBuilder();

            while (!done)
            {
                if (parser.Peek() == '}')
                {
                    done = true;
                    parser.Advance();
                }
                else if (parser.Peek() == '{')
                {
                    throw new EACompileError("Unexpected {");
                }
                else if (parser.Peek() == '{')
                {
                    done = true;
                    parser.Advance();
                }
                else if (parser.Peek() == ',')
                {
                    result.AddType(buffer.ToString().Trim().ToLower());
                    parser.Advance();
                    buffer.Length = 0;
                }
                else
                {
                    buffer.Append(parser.ReadChar());
                }
            }

            String s = buffer.ToString().Trim();

            if (s.Length > 0)
            {
                result.AddType(s);
            }

            return(result);
        }
Exemple #4
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        /// <summary>
        ///     Construct a basic template object.
        /// </summary>
        /// <param name="thePrecedence">The precedence.</param>
        /// <param name="theSignature">The opcode signature.</param>
        /// <param name="theType">The opcode type.</param>
        /// <param name="isVariable">True, if this opcode is a variable.</param>
        /// <param name="theDataSize">The data size kept for this opcode.</param>
        /// <param name="theEvaluate">The evaluator delegate.</param>
        /// <param name="theIsPossibleReturnType">The return type delegate.</param>
        /// <param name="theRandomize">The randomizer delegate.</param>
        public BasicTemplate(int thePrecedence, String theSignature,
                             NodeType theType, bool isVariable,
                             int theDataSize,
                             DelEvaluate theEvaluate,
                             DelIsPossibleReturnType theIsPossibleReturnType,
                             DelRandomize theRandomize)
        {
            _precedence = thePrecedence;
            _signature  = theSignature;
            _varValue   = isVariable;
            _dataSize   = theDataSize;
            _nodeType   = theType;

            _delEvaluate             = theEvaluate;
            _delIsPossibleReturnType = theIsPossibleReturnType;
            _delRandomize            = theRandomize;

            if (theSignature.Trim().Equals("("))
            {
                // special case, we add a left-paren for the shunting yard alg.
                _name        = theSignature;
                _returnValue = null;
            }
            else
            {
                // non-special case, find the name of the function/operator
                var  parser = new SimpleParser(theSignature);
                bool pass   = false;

                parser.EatWhiteSpace();
                _name = parser.ReadToChars("(").Trim();
                parser.Advance();

                bool done = false;
                while (!done)
                {
                    if (parser.Peek() == ')')
                    {
                        parser.Advance();
                        done = true;
                    }
                    else if (parser.Peek() == ':')
                    {
                        parser.Advance();
                        pass = true;
                    }
                    else if (parser.Peek() == '{')
                    {
                        ParamTemplate temp = ReadParam(parser);
                        temp.PassThrough = pass;
                        pass             = false;
                        _param.Add(temp);
                    }
                    else
                    {
                        parser.Advance();
                        if (parser.EOL())
                        {
                            throw new EncogError("Invalid opcode template.");
                        }
                    }
                }

                // get the return type
                parser.EatWhiteSpace();
                if (!parser.LookAhead(":", true))
                {
                    throw new EACompileError("Return type not specified.");
                }
                parser.Advance();
                parser.EatWhiteSpace();
                _returnValue = ReadParam(parser);
            }
        }
        /// <summary>
        /// Add events, as they are pased.
        /// </summary>
        /// <param name="parser">The parser.</param>
        /// <param name="results">The events found.</param>
        /// <param name="delim">The delimiter to use.</param>
        private void AddEvents(SimpleParser parser, IList <ParsedEvent> results, String delim)
        {
            bool          done = false;
            StringBuilder l    = new StringBuilder();

            while (!done && !parser.EOL())
            {
                char ch = parser.Peek();
                if (delim.IndexOf(ch) != -1)
                {
                    if (ch == ')' || ch == '|')
                    {
                        done = true;
                    }

                    ParsedEvent parsedEvent;

                    // deal with a value specified by + or -
                    if (l.Length > 0 && l[0] == '+')
                    {
                        String l2 = l.ToString().Substring(1);
                        parsedEvent       = new ParsedEvent(l2.Trim());
                        parsedEvent.Value = "true";
                    }
                    else if (l.Length > 0 && l[0] == '-')
                    {
                        String l2 = l.ToString().Substring(1);
                        parsedEvent       = new ParsedEvent(l2.Trim());
                        parsedEvent.Value = "false";
                    }
                    else
                    {
                        String l2 = l.ToString();
                        parsedEvent = new ParsedEvent(l2.Trim());
                    }

                    // parse choices
                    if (ch == '[')
                    {
                        parser.Advance();
                        int index = 0;
                        while (ch != ']' && !parser.EOL())
                        {
                            String labelName = parser.ReadToChars(":,]");
                            if (parser.Peek() == ':')
                            {
                                parser.Advance();
                                parser.EatWhiteSpace();
                                double min = double.Parse(parser.ReadToWhiteSpace());
                                parser.EatWhiteSpace();
                                if (!parser.LookAhead("to", true))
                                {
                                    throw new BayesianError("Expected \"to\" in probability choice range.");
                                }
                                parser.Advance(2);
                                double max = CSVFormat.EgFormat.Parse(parser.ReadToChars(",]"));
                                parsedEvent.ChoiceList.Add(new ParsedChoice(labelName, min, max));
                            }
                            else
                            {
                                parsedEvent.ChoiceList.Add(new ParsedChoice(labelName, index++));
                            }
                            parser.EatWhiteSpace();
                            ch = parser.Peek();

                            if (ch == ',')
                            {
                                parser.Advance();
                            }
                        }
                    }

                    // deal with a value specified by =
                    if (parser.Peek() == '=')
                    {
                        parser.ReadChar();
                        String value = parser.ReadToChars(delim);
                        //					BayesianEvent evt = this.network.getEvent(parsedEvent.getLabel());
                        parsedEvent.Value = value;
                    }

                    if (ch == ',')
                    {
                        parser.Advance();
                    }

                    if (ch == ']')
                    {
                        parser.Advance();
                    }

                    if (parsedEvent.Label.Length > 0)
                    {
                        results.Add(parsedEvent);
                    }
                    l.Length = 0;
                }
                else
                {
                    parser.Advance();
                    l.Append(ch);
                }
            }
        }