protected override IExpression VisitUnary(UnaryExpression unaryExpression)
{
if ((object)unaryExpression == null)
throw new ArgumentNullException(nameof(unaryExpression));
switch (unaryExpression.UnaryOperator)
{
case UnaryOperator.Not:
this.Strings.Append(" NOT ");
this.Visit(unaryExpression.TheExpression);
break;
case UnaryOperator.IsNull:
this.Visit(unaryExpression.TheExpression);
this.Strings.Append(" IS NULL ");
break;
case UnaryOperator.IsNotNull:
this.Visit(unaryExpression.TheExpression);
this.Strings.Append(" IS NOT NULL ");
break;
case UnaryOperator.Neg:
this.Strings.Append(" - ");
this.Visit(unaryExpression.TheExpression);
break;
case UnaryOperator.Pos:
this.Strings.Append(" + ");
this.Visit(unaryExpression.TheExpression);
break;
default:
throw new NotSupportedException(string.Format("The unary operator '{0}' is not supported.", unaryExpression.UnaryOperator));
}
return unaryExpression;
}
protected abstract IExpression VisitUnary(UnaryExpression unaryExpression);