DMD 0.150 release

[Stewart Gordon]

xs0 wrote:
> Stewart Gordon wrote:
>> xs0 wrote:
>>> Walter Bright wrote:
>>>> I wanted to get the interface covariant problem fixed for the 
>>>> library guys.
>>>>
>>>> http://www.digitalmars.com/d/changelog.html
>>>
>>> Out of curiosity - how did you implement it?
>>
>> The same way in which covariantly overriding a class method is 
>> implemented, surely.  Strikes me as trivial ... unless "the" interface 
>> covariant problem is something different from the two interface 
>> covariant problems I've seen....
> 
> Well, there's quite a difference between classes and interfaces in 
> handling covariance:
> 
> - all class references to the same object have the same value (i.e. they 
> point to the same address), regardless of their type
> - interface references to the same object, on the other hand, don't 
> point to the same address
<snip>

I think we are talking at cross purposes.

The two interface covariance problems I know of are:

(a) a method defined in an interface cannot be implemented with a 
covariant return type - this is a trivial matter of compile-time type 
checking and is now fixed

(b) strange things happen when you try to override a method with an 
interface return type to have a class return type - this bug is still there

http://d.puremagic.com/bugzilla/show_bug.cgi?id=65

What is this other issue you're talking about, which is also fixed?

Stewart.

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