How to check for null references

[Hans-Eric Grönlund]

Thank you Tim (and the others that pointed this out)! I had a feeling there'd be a simple answer.

Tim Healey Wrote:

> Use 'is' to test for null:
> 
> if ( o is null ) { ... }
> 
>  From http://www.digitalmars.com/d/expression.html#IdentityExpression : 
> For class objects, identity is defined as the object references are for 
> the same object. Null class objects can be compared with is.
> 
> The run-time error you got is because the program was essentially 
> executing this:
> 
> if ( o.opEquals( null ) ) { ... }
> 
> This is intended behavior, though I'm not finding the right spec page to 
> link you to at the moment.