public bool EvaluateBoolean(Report rpt, Row row)
{
try
{
return(_Expr.EvaluateBoolean(rpt, row));
}
catch (Exception e)
{
string err = String.Format("Exception evaluating {0}. {1}", _Source, e.Message);
ReportError(rpt, 4, err);
return(false);
}
}
public IExpr ConstantOptimization()
{
_If = _If.ConstantOptimization();
_IfTrue = _IfTrue.ConstantOptimization();
_IfFalse = _IfFalse.ConstantOptimization();
if (_If.IsConstant())
{
bool result = _If.EvaluateBoolean(null, null);
return result? _IfTrue: _IfFalse;
}
return this;
}
public IExpr ConstantOptimization()
{
_If = _If.ConstantOptimization();
_IfTrue = _IfTrue.ConstantOptimization();
_IfFalse = _IfFalse.ConstantOptimization();
if (_If.IsConstant())
{
bool result = _If.EvaluateBoolean(null, null);
return(result? _IfTrue: _IfFalse);
}
return(this);
}
// Evaluate is for interpretation (and is relatively slow)
public object Evaluate(Report rpt, Row row)
{
bool result = _If.EvaluateBoolean(rpt, row);
if (result)
{
return(_IfTrue.Evaluate(rpt, row));
}
object o = _IfFalse.Evaluate(rpt, row);
// We may need to convert IfFalse to same type as IfTrue
if (_IfTrue.GetTypeCode() == _IfFalse.GetTypeCode())
{
return(o);
}
return(Convert.ChangeType(o, _IfTrue.GetTypeCode()));
}
public bool EvaluateBoolean(Report rpt, Row row)
{
return(!_rhs.EvaluateBoolean(rpt, row));
}
