public static ParserState <Result> 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 LinearParserState(
w,
root,
null,
new ParserStep.EnterNode(null, root, reader.Location),
StatefullStackNode.ForRoot(),
null,
reader
));
}
private void PushChildIndex()
{
if (_log != null)
{
_log.WriteLine("PushChildIndex 0");
}
this.Stack = this.Stack.StartChildCount();
}
private LinearParserState(IndentedWriter w, ParserNode currNode, ParserNode prevNode, ParserStep lastStep, StatefullStackNode stack, bool?lastTerminalFailed, ISourceTextReader reader, ISourceTextReaderHolder holder = null)
: base(w, currNode, prevNode, lastTerminalFailed, reader, holder)
{
this.LastStep = lastStep;
this.Stack = stack;
if (_log != null)
{
_log.WriteLine(this.Stack.ToString());
}
}
private int IncChildIndex()
{
if (this.Stack.RecursionSource != null)
{
throw new InvalidOperationException();
}
this.Stack = this.Stack.CountNextChild();
if (_log != null)
{
_log.WriteLine("IncChildIndex {0}", this.Stack.ChildsCount);
}
return(this.Stack.ChildsCount);
}
private int PopChildIndex()
{
if (this.Stack.RecursionSource != null)
{
throw new InvalidOperationException();
}
var value = this.Stack.ChildsCount;
this.Stack = this.Stack.EndChildCount();
if (_log != null)
{
_log.WriteLine("PopChildIndex {0}", value);
}
return(value);
}
private StatefullStackNode(StatefullStackNode prev, int childsCount, ParserNode.RecursiveParserNode source)
{
this.Prev = prev;
this.ChildsCount = childsCount;
this.RecursionSource = source;
}