> Hi, let's suppose I have a
>
> class A
> {
> int x;
> ...
> public static bool operator == (A a1 , A a2)
> {
> return (a1.x==a2.x);
> }
> }
>
> But, outside the class, I have a problem when I try to test a probably not
> initialized class.
> For instance, think about this code:
> public void myFunc()
> {
> A a1;
> A a2;
> ....
> if (a1 == null)
> {
> //some null value handling
> }
> ...
> }
>
> The problem is that testing a1==null creates recursive calls to the
operator
> == of class A.
> How do I test if something is null without having to invoke the ==
operator
> for that "something"?
>
>
> Tnx in advance.
>
>

>BUT, comparing a1 == null creates the recursive call to operator == in class
>A

EL OSO wrote:

> I tried in the definition of operator == something like
> if (a1==null) or (a2==null)
> return false
> else
> return (a1.x == (a2.x)

> BUT, comparing a1 == null creates the recursive call to operator == in class
> A

> Do I make myself more clear this time? :p

"EL OSO" <noone@nospam.com> wrote in message
news:OaE65zyYFHA.3280@TK2MSFTNGP09.phx.gbl...
> Hi, let's suppose I have a
>
> class A
> {
> int x;
> ...
> public static bool operator == (A a1 , A a2)
> {
> return (a1.x==a2.x);
> }
> }
>
> But, outside the class, I have a problem when I try to test a probably not
> initialized class.
> For instance, think about this code:
> public void myFunc()
> {
> A a1;
> A a2;
> ....
> if (a1 == null)
> {
> //some null value handling
> }
> ...
> }
>
> The problem is that testing a1==null creates recursive calls to the
> operator
> == of class A.
> How do I test if something is null without having to invoke the ==
> operator
> for that "something"?
>
>
> Tnx in advance.
>
>