protected override object EvaluationInternal(IDictionary <object, object> parameters)
{
var operand = Operand.Evaluation(parameters);
if (operand == null)
{
return(null);
}
if (operand == ExpressionConstants.Unevaluatable)
{
return(ExpressionConstants.Unevaluatable);
}
var @bool = ExprEvalUtils.Obj2bool(operand);
return(@bool ? LiteralBoolean.False : LiteralBoolean.True);
}
protected override object EvaluationInternal(IDictionary <object, object> parameters)
{
var left = LeftOprand.Evaluation(parameters);
var right = rightOprand.Evaluation(parameters);
if (left == null || right == null)
{
return(null);
}
if (left == ExpressionConstants.Unevaluatable || right == ExpressionConstants.Unevaluatable)
{
return(ExpressionConstants.Unevaluatable);
}
var b1 = ExprEvalUtils.Obj2bool(left);
var b2 = ExprEvalUtils.Obj2bool(right);
return(b1 != b2 ? LiteralBoolean.True : LiteralBoolean.False);
}
protected override object EvaluationInternal(IDictionary <object, object> parameters)
{
foreach (var operand in operands)
{
var val = operand.Evaluation(parameters);
if (val == null)
{
return(null);
}
if (val == ExpressionConstants.Unevaluatable)
{
return(ExpressionConstants.Unevaluatable);
}
if (ExprEvalUtils.Obj2bool(val))
{
return(LiteralBoolean.True);
}
}
return(LiteralBoolean.False);
}