[Bug c++/108538] unexpected -Wnarrowing errors in -fpermissive mode

["redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108538

Jonathan Wakely <redi at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Last reconfirmed|                            |2023-01-25
             Status|UNCONFIRMED                 |NEW
           Severity|normal                      |enhancement
                 CC|                            |jason at gcc dot gnu.org
     Ever confirmed|0                           |1
           Keywords|                            |diagnostic

--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Stas Sergeev from comment #2)
> But I used -fpermissive mode to
> compile the mix of c/c++.

It seems like you might be expecting more from -fpermissive than it actually
provides. It only affects a very limited set of diagnostics, and isn't a
general "compile invalid code" switch.

It might be reasonable to make it affect narrowing diagnostics though. The
downside would be complicating the code by adding even more interactions
between different switches and dialects.

Confirming as an enhancement request to relax some narrowing errors with
-fpermissive, but C++ front end maintainers should decide whether that's
actually desirable.