[Bug c++/70834] Incorrect warning for placement new when conditionally used

[manu at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70834

Manuel López-Ibáñez <manu at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |diagnostic
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2017-01-03
                 CC|                            |manu at gcc dot gnu.org
     Ever confirmed|0                           |1

--- Comment #3 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
The warning comes from the FE, which knows nothing about control-flow. We have
many open PRs regarding this (see PR23577) but it is not something that will
change in the near future.

It may work if you use ?: since that is optimised very early (but perhaps not
before this warning, I don't know).