The following code segfaults, it appears that you cannot use an interface as the key for an associative array.

interface foo
{
    void bar();
}

class MyClass : foo
{
    void bar() {};
}

void main ()
{
    int [foo] c;
    MyClass mc = new MyClass ();
    c[mc] = 0;
}

Brad

brad beveridge wrote:

> The following code segfaults, it appears that you cannot use an interface as the key for an associative array.
> 
> interface foo
> {
>     void bar();
> }
> 
> class MyClass : foo
> {
>     void bar() {};
> }
> 
> void main ()
> {
>     int [foo] c;
>     MyClass mc = new MyClass ();
>     c[mc] = 0;
> } 

Seems to be related to calling toHash() on an interface ?
(side note: on Mac, I get "illegal hardware instruction")

std.typeinfo.ti_C.d:
> class TypeInfo_C : TypeInfo

>     uint getHash(void *p)
>     {
> 	Object o = *cast(Object*)p;
> 	assert(o);
> 	return o.toHash();
>     }

Because it crashes, even without involving the AA type :
(The actual crash seems to occur in object.Object.print ?)

> void main ()
> {
>     MyClass mc = new MyClass ();
>     foo mi = mc;
>     Object* mp = cast(Object*)&mi;
>     Object mo = *mp;
>     debug printf("%d\n", mo.toHash());
> } 

If one uses the class instead of the interface, it works...

> void main ()
> {
>     MyClass mc = new MyClass ();
>     Object* mp = cast(Object*)&mc;
>     Object mo = *mp;
>     debug printf("%d\n", mo.toHash());
> } 

--anders

PS. Bugs go in the bugs group.

> PS. Bugs go in the bugs group.
Doh!  I'll try to remember next time.  Thanks for posting to there also.

Brad