Operator precedance

[Boni]

Dear All,

I am wondering that followind produces an exception if Startline is
Nothzing.

In C++ is first operation is true it would be enougth for the or statement
to be true.

If elem.StartLine Is Nothing Or elem.StartLine.ParentLine Is Nothing Then
....

Is there some setting to eleminate it?

Thanks,

Boni

 

[Cor Ligthert]

Boni,

That is the same in VBNet, however in VB they both are evaluated when it is
the Or.

To avoid that is created the operator OrElse. That acts as in every other
program language the Or.

I hope this helps,

Cor

 

[Herfried K. Wagner [MVP]]

I am wondering that followind produces an exception if Startline is
Nothzing.

In C++ is first operation is true it would be enougth for the or statement
to be true.

If elem.StartLine Is Nothing Or elem.StartLine.ParentLine Is Nothing Then

Take a look at the documentation for the 'Or' and 'OrElse' operator.
'OrElse' will perform short-circuiting.