Friday, February 3, 2023

Digest for comp.lang.c++@googlegroups.com - 5 updates in 3 topics

Mr Flibble <flibble@reddwarf.jmc.corp>: Feb 03 01:06PM

I forgot how easy it was to invoke C++ ODR-based undefined behaviour when
using nested namespaces! :o
 
header file #1 :-
 
namespace parent
{
class foo
{
};
}
 
header file #2 :-
 
namespace parent::child
{
class foo
{
};
}
 
header file #3 :-
 
namepsace parent::child
{
class bar
{
foo m; // which foo this is depends on header file
inclusion for this translation unit! :o
};
}
 
/Flibble
Bonita Montero <Bonita.Montero@gmail.com>: Feb 03 07:15PM +0100

And what's your practical problem with that ?
 
Am 03.02.2023 um 14:06 schrieb Mr Flibble:
Tim Rentsch <tr.17687@z991.linuxsc.com>: Feb 02 05:42PM -0800


>> This claim isn't right. Any class (or struct) that has at least
>> one virtual function will have a virtual function table. The
 
> Has at least one != every.
 
That's true, but it has no bearing on what I said.
"james...@alumni.caltech.edu" <jameskuyper@alumni.caltech.edu>: Feb 02 04:36PM -0800

On Thursday, February 2, 2023 at 9:44:06 AM UTC-5, Tim Rentsch wrote:
> Keith Thompson <Keith.S.T...@gmail.com> writes:
...
> > a name.
> Just a quibble: C does have some objects that are not variables
> in the usual sense of the word. ...
 
True, and his comment implies that fact, by using the word "except" - when that exception does not apply, you still have an object, but not a variable.
Tim Rentsch <tr.17687@z991.linuxsc.com>: Feb 02 05:38PM -0800


> True, and his comment implies that fact, by using the word "except"
> - when that exception does not apply, you still have an object, but
> not a variable.
 
I suppose that is one way of reading it. But certainly it
is not the only way of reading it.
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