[Issue 20316] array properties fail hasMember

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=20316

RazvanN <razvan.nitu1305 at gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |razvan.nitu1305 at gmail.com

--- Comment #2 from RazvanN <razvan.nitu1305 at gmail.com> ---
The problem here is that (int[]).length is not a valid D construction:

static assert(__traits(compiles, (int[]).length));

will fail, therefore traits(hasMember) returns false.

length, ptr and capacity were thought to work solely on expressions, not on
types (it doesn't make sense to get the pointer of a type) so I'm a bit
confused of what the compiler should do here.

sizeof and alignof work because there are type properties.

--