On Mon, Feb 8, 2016 at 7:59 AM, Jonathan Wakely <[email protected]> wrote:
>>> A type is a standard-layout type, or it isn't.
>>
>> How about "An empty record is standard-layout Plain Old Data (POD)
>> type and ..."?
>
> That's redundant, all POD types are standard-layout types.
>
Apparently, not all standard-layout types are POD types. GCC has
/* Nonzero means that this class type is not POD for the purpose of layout
(as defined in the ABI). This is different from the language's POD. */
CLASSTYPE_NON_LAYOUT_POD_P
and
/* Nonzero means that this class type is a non-standard-layout class. */
#define CLASSTYPE_NON_STD_LAYOUT
They aren't the same.
struct A { };
struct B { };
struct C : A, B { };
C is a standard-layout type, but not a standard-layout POD type.
--
H.J.
