public override AstNode GetNodeAt(int line, int pos)
{
//TODO add support for line detection
foreach (NVSelector selector in _selectors)
{
NVSelector foundSelector = (NVSelector)selector.GetNodeAt(line, pos);
if (foundSelector != null)
{
return(foundSelector);
}
}
return(base.GetNodeAt(line, pos));
}
private NVReference ParseNVDesignator(Position startPosition)
{
// NVDesignator -> nvIdentifer { "." nvIdentifier [ NVActualParams ] }.
NVReference nvReference;
if (CurrentTokenType == TokenType.NVIdentifier)
{
nvReference = new NVReference(new NVDesignator(_scanner.CurrentToken.Image));
nvReference.Position = new Position(startPosition, _scanner.CurrentPos);
_scanner.GetToken();
}
else
{
AddError("Expected reference identifier");
nvReference = new NVReference(new NVDesignator(""));
nvReference.Position = new Position(startPosition, _scanner.CurrentPos);
return nvReference;
}
while (CurrentTokenType == TokenType.NVDot)
{
Position startSelectorPosition = new Position(_scanner.CurrentPos.Start);
Position dotPosition = new Position(_scanner.CurrentPos);
_scanner.GetToken();
if (CurrentTokenType == TokenType.NVIdentifier)
{
Position endSelectorPosition = new Position(_scanner.CurrentPos.End);
NVSelector selector = new NVSelector(new NVMethodNode(
_scanner.CurrentToken.Image), nvReference);
_scanner.GetToken();
if (CurrentTokenType == TokenType.NVLParen)
{
selector.Actuals = ParseNVActualParams();
endSelectorPosition = new Position(_scanner.PreviousPos.Start);
}
selector.Position = new Position(startSelectorPosition, endSelectorPosition);
nvReference.Designator.Selectors.Add(selector);
nvReference.Position.End = new Position(endSelectorPosition);
}
else
{
AddError("Expected identifier");
NVSelector selector = new NVSelector(new NVMethodNode("", null), nvReference);
selector.Position = new Position(dotPosition);
nvReference.Designator.Selectors.Add(selector);
nvReference.Position.End = new Position(selector.Position.End);
return nvReference;
}
}
return nvReference;
}