[v3 PATCH] nonesuch is insufficiently useless (lwg2996)

[Nina Dinka Ranns]

That was fast :)
I’ll check the changelog for future reference.
Thanks,
Nina

On Tue, 14 May 2019 at 16:50, Jonathan Wakely <jwakely@redhat.com> wrote:

> On 14/05/19 15:43 +0100, Nina Dinka Ranns wrote:
> >Tested on Linux x86_64
> >nonesuch is insufficiently useless (lwg2996)
> >
> >2019-05-14  Nina Dinka Ranns  <dinka.ranns@gmail.com>
> >        nonesuch is insufficiently useless (lwg2996)
> >        * include/std/type_traits
> >        struct __nonesuch: added private base class to make __nonesuch
> >not an aggregate and removed deleted default constructor
> >        * include/bits/stl_pair.h:
> >        struct __nonesuch_no_braces: Removed
> >        (operator=(const pair&)): Use __nonesuch instead of
> >__nonesuch_no_braces.
> >        (operator=(pair&&)): Likewise
> >        * include/std/tuple
> >        (operator=(const tuple&)): Use __nonesuch instead of
> >__nonesuch_no_braces.
> >        (operator=(tuple&&)): Likewise
> >        * include/experimental/type_traits
> >         struct nonesuch: added private base class to make nonesuch
> >not an aggregate and removed deleted default constructor
> >        * testsuite/20_util/nonesuch/nonesuch.cc: New
> >        * testsuite/experimental/type_traits/nonesuch.cc: New
>
> Thanks!
>
> Tested and committed, again with some changelog edits, and some whitespace
> before the opening braces here ...
>
> >@@ -2769,8 +2769,8 @@
> >              __call_is_nothrow_<_Fn, _Args...>>::type
> >     { };
> >
> >-  struct __nonesuch {
> >-    __nonesuch() = delete;
> >+  struct __nonesuchbase{};
> >+  struct __nonesuch : private __nonesuchbase{
>
>
>