//public static ParserTreeState ForStart(ParserNode root, ISourceTextReader reader, bool enableLog) //{ // IndentedWriter w; // if (enableLog) // { // w = new IndentedWriter(" "); // w.Push().WriteLine("Start @{0} {1}", reader.GetPosition(), root).Push(); // } // else // { // w = null; // } // if (root.Parent != null) // throw new ArgumentException(); // return new ParserTreeState( // w, // null, // ParsingTreeNode.CreateRootGroup(root, reader.Location), // null, // reader // ); //} public static ParserState <Result> ForStart(ParserNode grammarRoot, ParserNode omitRoot, ISourceTextReader reader, IParsingTreeNode oldRoot, Location limit, bool enableLog) { IndentedWriter w; if (enableLog) { w = new IndentedWriter(" "); if (oldRoot != null) { w.WriteLine("Incrementally"); } w.Push().WriteLine("Start @{0} {1}", reader.GetPosition(), grammarRoot).Push(); } else { w = null; } if (oldRoot != null) { ParserNode prevGrammarNode = null; bool insideOmittedFragment; var treeNode = ParsingTreeNode.CreateRootGroup(oldRoot, omitRoot, reader.Location, limit, out prevGrammarNode, out insideOmittedFragment); if (!reader.MoveTo(treeNode.Location)) { throw new NotImplementedException(""); } if (w != null) { w.WriteLine("Reconstructing log indentation..."); var t = treeNode; var path = new List <ParsingTreeNode.TemporaryGroup>(); while (t != null) { path.Add(t); t = t.Parent; } path.Reverse(); for (int i = 0; i < path.Count - 1; i++) { w.Push().WriteLine("EnterNode @{2} {0} --> {1}", path[i].GrammarNode, path[i + 1].GrammarNode, path[i].Location).Push(); if (path[i].GrammarNode is ParserNode.RecursiveParserNode) { w.WriteLine("Enter to recursion"); } } w.WriteLine("...Identation reconstructed."); } ParserState <Result> state = new ParserTreeState( w, prevGrammarNode, treeNode, null, reader ); state.InsideOmittedFragment = insideOmittedFragment; if (state.LastTerminalFailed == false) { state = state.ExitNode(); } else { System.Diagnostics.Debug.Print(string.Empty); } return(state); } else { return(new ParserTreeState( w, null, ParsingTreeNode.CreateRootGroup(grammarRoot, reader.Location), null, reader )); } }
protected override ParserState <ParserTreeState.Result> CreateInitialStateImpl(ParserNode grammarRoot, ParserNode omitRoot, ISourceTextReader source, ParserTreeState.Result oldResult, Location limit, bool enableLog) { return(oldResult == null ? ParserTreeState.ForStart(grammarRoot, omitRoot, source, null, limit, enableLog) : ParserTreeState.ForStart(grammarRoot, omitRoot, source, oldResult.Tree, limit, enableLog)); }