public ISourceTextReaderHolder Clone()
{
if (_holder == null)
{
_holder = new StringSourceTextReader(this);
}
return(_holder);
}
internal ParserState(IndentedWriter log, ParserNode curr, ParserNode prev, bool?lastTerminalFailed, ISourceTextReader reader, ISourceTextReaderHolder holder = null)
{
this.CurrNode = curr;
this.PrevNode = prev;
this.ResultReconstructed = false;
_log = log;
this.LastTerminalFailed = lastTerminalFailed;
_reader = reader;
_readerHolder = holder;
}
public bool Move(int offset)
{
if (offset == 0)
{
return(true);
}
int i, j;
int step = Math.Sign(offset);
int count = Math.Abs(offset);
var line = _line;
var column = _column;
for (i = _pos, j = 0; i < _text.Length && i >= 0 && j < count; i += step, j++, column += step)
{
var c = _text[i];
if (c == _newLine)
{
line += step;
column = step > 0 ? -step : this.FindLineStart(i - 1);
}
}
if (column < 0)
{
throw new NotImplementedException("");
}
bool ok;
if (i <= _text.Length && i >= 0)
{
ok = true;
_holder = null;
_pos = i;
_line = line;
_column = column;
}
else
{
ok = false;
}
return(ok);
}
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());
}
}
protected ParserTreeState(IndentedWriter log, ParserNode prev, ParsingTreeNode.TemporaryGroup treeNode, bool?lastTerminalFailed, ISourceTextReader reader, ISourceTextReaderHolder holder = null)
: base(log, treeNode.GrammarNode, prev, lastTerminalFailed, reader, holder)
{
this.TreeNode = treeNode;
}