public override Values.Value ReadValue(RunScope scope)
{
if (_whereExp != null)
{
_whereExp.ReadValue(scope);
}
if (_aggExp != null)
{
return(_aggExp.ReadValue(scope));
}
else if (_name == "count")
{
return(Value.CreateUnknownFromDataType(DataType.Int));
}
else
{
return(base.ReadValue(scope));
}
}
public override void Simplify(RunScope scope)
{
if (Parent == null)
{
throw new InvalidOperationException("Conditional operator must have a parent.");
}
var leftScope = scope.Clone();
var leftNode = Parent.GetLeftSibling(leftScope, this);
scope.Merge(leftScope);
if (leftNode == null)
{
ReportError(_opSpan, CAError.CA0007, "?"); // Operator '{0}' expects value on left.
Parent.ReplaceWithResult(Value.Void, ResultSource.Conditional1, this);
}
else
{
var leftValue = leftNode.ReadValue(leftScope);
if (leftValue.IsVoid)
{
leftNode.ReportError(_opSpan, CAError.CA0007, "?"); // Operator '{0}' expects value on left.
}
Value result = null;
if (leftValue.IsTrue)
{
if (_trueExp != null)
{
result = _trueExp.ReadValue(scope);
}
else
{
result = Value.Void;
}
}
else if (leftValue.IsFalse)
{
if (_falseExp != null)
{
result = _falseExp.ReadValue(scope);
}
else
{
result = Value.Void;
}
}
else
{
if (_trueExp != null)
{
result = _trueExp.ReadValue(scope);
}
if (_falseExp != null)
{
var value = _falseExp.ReadValue(scope);
if (result == null)
{
result = value;
}
}
if (result == null)
{
result = Value.Void;
}
}
Parent.ReplaceWithResult(result, leftNode, this);
}
}
