internal RegexNode MakePossessive()
{
var result = new RegexNode(Greedy, _options);
result.AddChild(this);
return(result);
}
internal RegexNode MakeQuantifier(bool lazy, int min, int max)
{
RegexNode result;
if (min == 0 && max == 0)
{
return(new RegexNode(Empty, _options));
}
if (min == 1 && max == 1)
{
return(this);
}
switch (_type)
{
case One:
case Notone:
case Set:
MakeRep(lazy ? Onelazy : Oneloop, min, max);
return(this);
default:
result = new RegexNode(lazy ? Lazyloop : Loop, _options, min, max);
result.AddChild(this);
return(result);
}
}
private RegexNode CreatePseudoEndZNode()
{
// Create a lookahead, e.g.: (?=(?>\r\n|[\r\n])?\z)
var options = _options & ~RegexOptions.RightToLeft;
var lineCheckNode = CreateNewLineParseNode(GetNewlineTypes(), options);
var maybeNode = new RegexNode(RegexNode.Loop, options, 0, 1);
maybeNode.AddChild(lineCheckNode);
var concatNode = new RegexNode(RegexNode.Concatenate, options);
concatNode.AddChild(maybeNode);
concatNode.AddChild(new RegexNode(RegexNode.End, options));
var lookaheadNode = new RegexNode(RegexNode.Require, options);
lookaheadNode.AddChild(concatNode);
return(lookaheadNode);
}
private RegexNode CreatePseudoCircumflexNode()
{
// Create a lookbehind, e.g.: (?<=(?>\A|\r\n|[\r\n]))
var options = _options | RegexOptions.RightToLeft;
var newlineTypes = GetNewlineTypes() | NewlineTypes.DocumentStart;
var lineCheckNode = CreateNewLineParseNode(newlineTypes, options);
var lookaheadNode = new RegexNode(RegexNode.Require, options);
lookaheadNode.AddChild(lineCheckNode);
return(lookaheadNode);
}
private RegexNode CreatePseudoDollarNode()
{
if (!UseOptionM())
{
Debug.Assert(!UseOptionDollarEndOnly()); // Could have been handled by a simple \z
return(CreatePseudoEndZNode());
}
// Create a lookahead, e.g.: (?=(?>\z|\r\n|[\r\n]))
var options = _options & ~RegexOptions.RightToLeft;
var newlineTypes = GetNewlineTypes() | NewlineTypes.DocumentEnd;
var lineCheckNode = CreateNewLineParseNode(newlineTypes, options);
var lookaheadNode = new RegexNode(RegexNode.Require, options);
lookaheadNode.AddChild(lineCheckNode);
return(lookaheadNode);
}
