[cfe-dev] Setting default dialect to C++11

[David Blaikie via cfe-dev]

On Thu, Mar 2, 2017 at 8:58 AM Joerg Sonnenberger via cfe-dev <
cfe-dev at lists.llvm.org> wrote:

> On Thu, Mar 02, 2017 at 07:24:15AM -0800, Tim Northover wrote:
> > On 2 March 2017 at 04:01, Joerg Sonnenberger via cfe-dev
> > <cfe-dev at lists.llvm.org> wrote:
> > > On Wed, Mar 01, 2017 at 05:07:00PM -0800, Mehdi Amini via cfe-dev
> wrote:
> > > I somewhat disagree and that's why I didn't have a problem with the
> > > change. As long as we silently miscompile C++03 code when enabling
> C++11
> > > or later, I don't think it should be a general default.
> >
> > And I think that would commit us to keep C++03 forever, which is
> > untenable. Further, I think expecting the minimal maintenance required
> > to add "-std=c++03" if a project needs it is not unreasonable.
>
> Is it untenable? Why? POLA says to give a reasonable behavior and breaking
> existing code is not reasonable.


Though it's pretty astonishing to new users when they write current C++ and
the compiler doesn't accept it.


> Mandating what standard your code uses
> is actually a much saner choice. You are still ignoring my main point:
> there is no easy way to tell if a given code base needs -std=c++03.
> Older versions of SOCI for example worked perfectly well when compiled
> in C++11 mode, until you actually triggered an error. The error case
> then was far from pretty.
>
> Joerg
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