private void ParseIfBlockComment()
{
var ifBlockNode = new IfBlockNode();
AppendNode(ifBlockNode);
_nodeStack.Push(ifBlockNode);
var expression = SqlTokenHelper.Extract(_tokenType, _token);
var ifNode = new IfNode(Location, expression, _token);
ifBlockNode.IfNode = ifNode;
_nodeStack.Push(ifNode);
}
private bool HandleIfNode(IfBlockNode node, Context parameter)
{
var ifNode = node.IfNode;
var expression = ifNode.Expression;
var isValid = ExpressionEvaluator.Evaluate(expression, _propertyValues);
if (isValid)
{
ifNode.Accept(this, parameter);
return(true);
}
return(false);
}
public object VisitIfBlockNode(IfBlockNode node, Context parameter)
{
if (!HandleIfNode(node, parameter))
{
if (!HandleElseifNode(node, parameter))
{
HandleElseNode(node, parameter);
}
}
var endNode = node.EndNode;
return(endNode.Accept(this, parameter));
}
private bool HandleElseifNode(IfBlockNode node, Context parameter)
{
foreach (var elseifNode in node.ElseifNodes)
{
var expression = elseifNode.Expression;
var isValid = ExpressionEvaluator.Evaluate(expression, _propertyValues);
if (isValid)
{
elseifNode.Accept(this, parameter);
return(true);
}
}
return(false);
}
private void HandleElseNode(IfBlockNode node, Context parameter)
{
var elseNode = node.ElseNode;
elseNode?.Accept(this, parameter);
}
