Re: [patch] Clarify interaction of -Wnarrowing with -std

[Sandra Loosemore <sandra at codesourcery dot com>]

On 02/19/2016 12:01 PM, Jason Merrill wrote:
> On 02/19/2016 07:42 AM, Jonathan Wakely wrote:
> > In PR69864 Manu suggests improving the docs to explain that
> > -Wnarrowing sometimes produces errors not warnings.
> >
> > I think the right way to do that is clarify how it interacts with
> > -std. Specifically that the effect of -Wnarrowing listed first in the
> > manual *only* applies to C++98 modes, For all later modes (not just
> > with -std=c++11 as it says now), narrowing conversions produce errors
> > or warnings by default.
> >
> > OK for trunk?
>
> OK, thanks.

I suppose the patch is OK as it stands, but I was going to suggest 
restructuring it so that it talks about the default behavior first and 
what it does with non-default -std= options after that, instead of 
vice-versa.  Unfortunately I am backlogged on other things right now and 
it might take me a day or two before I have time to come up with some 
alternate wording.  If we are in a rush, go ahead and commit the 
existing patch meanwhile, I guess.

-Sandra