Re: [cxx-abi-dev] What is a POD? TC1 or first C++ Standard

[Nathan Sidwell <nathan@xxxxxxxxxxxxxxxx>]

Dennis Handly wrote:
> > From: Gabriel Dos Reis <gdr@xxxxxxxxxxx>
> > And it would appear to users very counter-intuitive and confusing if
> > pointer-to-members were treated very differently from other PODs.
>
> I wouldn't think so.  It was there in black and white saying they are
> not PODs, 9(4).  ;-)
> Probably because they are not available in C.
I was the submitter of DR 148, responsible for this change.  I pointed
out that pointers-to-members themselves were PODs [3.9]/10, but a structure
containing that particular POD would be non-POD.  That was inconsistent.

ah, found it. http://www.open-std.org/jtc1/sc22/wg21/docs/cwg_defects.html#148


148. POD classes and pointers to members
Section: 9  class     Status: TC1     Submitter: Nathan Sidwell     Date: 31 Jul 1999

3.9  basic.types paragraph 10 defines pointer to member types to be scalar types.
It also defines scalar types to be one of the POD types.

9  class paragraph 4 defines a POD struct as an aggregate class with no non-static
data members of type pointer to member.

It seems contradictory that a type can be POD, yet a class containing that type
is non-POD.

Suggested resolution: Alter 9  class paragraph 4 to allow pointer to member objects
as non-static data members of POD class.

Proposed resolution (10/00):

In 9  class paragraph 4, remove all occurrences of "pointer to member."

nathan

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