The following example doesn't compile with D2:

class Foo
{
    private Object value;

    synchronized bool hasValue (Object val)
    {
        return value == val;
    }
}

It gives the error:

main.d(11): Error: function object.opEquals (Object lhs, Object rhs) is not callable using argument types (shared(Object),Object)
main.d(11): Error: cannot implicitly convert expression (this.value) of type shared(Object) to object.Object

Is that because object.opEquals hasn't been overloaded with a shared version yet? If that's the case has this already been reported in bugzilla?

-- 
/Jacob Carlborg

Jacob Carlborg <doob@me.com> wrote:

> The following example doesn't compile with D2:
>
> class Foo
> {
>      private Object value;
>
>      synchronized bool hasValue (Object val)
>      {
>          return value == val;
>      }
> }
>
> It gives the error:
>
> main.d(11): Error: function object.opEquals (Object lhs, Object rhs) is not callable using argument types (shared(Object),Object)
> main.d(11): Error: cannot implicitly convert expression (this.value) of type shared(Object) to object.Object
>
> Is that because object.opEquals hasn't been overloaded with a shared version yet? If that's the case has this already been reported in bugzilla?

You're absolutely right about the cause. This is related to, though not the
same issue as, #1824 (http://d.puremagic.com/issues/show_bug.cgi?id=1824)
I'm unsure whether this should be added to #1824 or filed as a separate bug.

-- 
Simen

On 2010-09-12 23:00, Simen kjaeraas wrote:
> Jacob Carlborg <doob@me.com> wrote:
>
>> The following example doesn't compile with D2:
>>
>> class Foo
>> {
>> private Object value;
>>
>> synchronized bool hasValue (Object val)
>> {
>> return value == val;
>> }
>> }
>>
>> It gives the error:
>>
>> main.d(11): Error: function object.opEquals (Object lhs, Object rhs)
>> is not callable using argument types (shared(Object),Object)
>> main.d(11): Error: cannot implicitly convert expression (this.value)
>> of type shared(Object) to object.Object
>>
>> Is that because object.opEquals hasn't been overloaded with a shared
>> version yet? If that's the case has this already been reported in
>> bugzilla?
>
> You're absolutely right about the cause. This is related to, though not the
> same issue as, #1824 (http://d.puremagic.com/issues/show_bug.cgi?id=1824)
> I'm unsure whether this should be added to #1824 or filed as a separate
> bug.

Filed as http://d.puremagic.com/issues/show_bug.cgi?id=4857

-- 
/Jacob Carlborg

On Sun, 12 Sep 2010 17:00:54 -0400, Simen kjaeraas <simen.kjaras@gmail.com> wrote:

> Jacob Carlborg <doob@me.com> wrote:
>
>> The following example doesn't compile with D2:
>>
>> class Foo
>> {
>>      private Object value;
>>
>>      synchronized bool hasValue (Object val)
>>      {
>>          return value == val;
>>      }
>> }
>>
>> It gives the error:
>>
>> main.d(11): Error: function object.opEquals (Object lhs, Object rhs) is not callable using argument types (shared(Object),Object)
>> main.d(11): Error: cannot implicitly convert expression (this.value) of type shared(Object) to object.Object
>>
>> Is that because object.opEquals hasn't been overloaded with a shared version yet? If that's the case has this already been reported in bugzilla?
>
> You're absolutely right about the cause. This is related to, though not the
> same issue as, #1824 (http://d.puremagic.com/issues/show_bug.cgi?id=1824)
> I'm unsure whether this should be added to #1824 or filed as a separate bug.

Not exactly right.  Comparing two objects has been altered significantly since a few versions ago.  Instead of a = b translating to a.opEquals(b), it translates to opEquals(a, b).  opEquals(a, b) is defined in object.di as:

bool opEquals(Object o1, Object o2);

This means you cannot compare shared, immutable, or const objects, and you cannot compare interfaces (because interfaces do not implicitly cast to Object).  Even if you updated Object.opEquals, it still wouldn't work.

It is a severe problem that has been ignored for quite a while (especially the interface comparison problem).

The interface bug report: http://d.puremagic.com/issues/show_bug.cgi?id=4088

-Steve