public override ParseNode_Base Parse(SyntaxTreeBuilder pSyntaxTreeBuilder)
{
var ifNode = node as ParseNode_ManyOpt_If;
if (ifNode != null)
{
if (!ifNode.Matches(pSyntaxTreeBuilder))
{
return(parent.NextAfterChild(this, pSyntaxTreeBuilder));
}
var tokenIndex = pSyntaxTreeBuilder.TokenScanner.CurrentTokenIndex;
var line = pSyntaxTreeBuilder.TokenScanner.CurrentLine;
var nextNode = node.Parse(pSyntaxTreeBuilder);
if (nextNode != this || pSyntaxTreeBuilder.TokenScanner.CurrentTokenIndex != tokenIndex || pSyntaxTreeBuilder.TokenScanner.CurrentLine != line)
{
return(nextNode);
}
//Debug.Log("Exiting Many " + this + " in goal: " + pSyntaxTreeBuilder.CurrentParseTreeNode);
}
else
{
if (!FirstSet.Contains(pSyntaxTreeBuilder.TokenScanner.Current.tokenId))
{
return(parent.NextAfterChild(this, pSyntaxTreeBuilder));
}
var tokenIndex = pSyntaxTreeBuilder.TokenScanner.CurrentTokenIndex;
var line = pSyntaxTreeBuilder.TokenScanner.CurrentLine;
var nextNode = node.Parse(pSyntaxTreeBuilder);
if (!(nextNode == this && pSyntaxTreeBuilder.TokenScanner.CurrentTokenIndex == tokenIndex && pSyntaxTreeBuilder.TokenScanner.CurrentLine == line))
{
// throw new Exception("Infinite loop!!! while parsing " + pSyntaxTreeBuilder.Current + " on line " + pSyntaxTreeBuilder.CurrentLine());
return(nextNode);
}
}
return(parent.NextAfterChild(this, pSyntaxTreeBuilder));
}
public override ParseNode_Base Parse(SyntaxTreeBuilder pSyntaxTreeBuilder)
{
bool wasError = pSyntaxTreeBuilder.ErrorMessage != null;
ParseNode_Base ret = null;
if (FirstSet.Contains(pSyntaxTreeBuilder.TokenScanner.Current))
{
ret = rhs.Parse(pSyntaxTreeBuilder);
}
if ((ret == null || !wasError && pSyntaxTreeBuilder.ErrorMessage != null) && !FirstSet.ContainsEmpty())
{
pSyntaxTreeBuilder.SyntaxErrorExpected(FirstSet);
return(ret ?? this);
}
if (ret != null)
{
return(ret);
}
return(NextAfterChild(rhs, pSyntaxTreeBuilder)); // ready to be reduced
}