private State ParseStart(Reader r, IList <ExpressionNode> nodes)
{
if (ParseNot(r))
{
nodes.Add(new LogicalNotNode());
return(State.Start);
}
else if (ParseOpenBrace(r))
{
return(State.AttachedProperty);
}
else if (PeekOpenBracket(r))
{
return(State.Indexer);
}
else
{
var identifier = IdentifierParser.Parse(r);
if (identifier != null)
{
nodes.Add(new PropertyAccessorNode(identifier, _enableValidation));
return(State.AfterMember);
}
}
return(State.End);
}
private State ParseAttachedProperty(Reader r, List <ExpressionNode> nodes)
{
var owner = IdentifierParser.Parse(r);
if (r.End || !r.TakeIf('.'))
{
throw new ExpressionParseException(r.Position, "Invalid attached property name.");
}
var name = IdentifierParser.Parse(r);
if (r.End || !r.TakeIf(')'))
{
throw new ExpressionParseException(r.Position, "Expected ')'.");
}
nodes.Add(new PropertyAccessorNode(owner + '.' + name, _enableValidation));
return(State.AfterMember);
}
private State ParseBeforeMember(Reader r, IList <ExpressionNode> nodes)
{
if (ParseOpenBrace(r))
{
return(State.AttachedProperty);
}
else
{
var identifier = IdentifierParser.Parse(r);
if (identifier != null)
{
nodes.Add(new PropertyAccessorNode(identifier, _enableValidation));
return(State.AfterMember);
}
return(State.End);
}
}