[cfe-commits] r150625 - in /cfe/trunk: include/clang/Basic/DiagnosticSemaKinds.td include/clang/Sema/Initialization.h lib/Sema/SemaInit.cpp test/Misc/warning-flags.c test/SemaCXX/cxx0x-initializer-aggregates.cpp

[Richard Smith]

On Wed, Feb 15, 2012 at 4:14 PM, Eli Friedman <eli.friedman at gmail.com>wrote:

> On Wed, Feb 15, 2012 at 3:39 PM, Richard Smith <richard at metafoo.co.uk>
> wrote:
> > On Wed, Feb 15, 2012 at 2:49 PM, Eli Friedman <eli.friedman at gmail.com>
> > wrote:
> >>
> >> On Wed, Feb 15, 2012 at 2:38 PM, Richard Smith
> >> <richard-llvm at metafoo.co.uk> wrote:
> >> > Author: rsmith
> >> > Date: Wed Feb 15 16:38:09 2012
> >> > New Revision: 150625
> >> >
> >> > URL: http://llvm.org/viewvc/llvm-project?rev=150625&view=rev
> >> > Log:
> >> > Support GCC's bug^Wextension allowing class array members to be
> >> > initalized by a
> >> > parenthesized braced-init-list in the base/member initialization list.
> >> >
> >> > Modified:
> >> >    cfe/trunk/include/clang/Basic/DiagnosticSemaKinds.td
> >> >    cfe/trunk/include/clang/Sema/Initialization.h
> >> >    cfe/trunk/lib/Sema/SemaInit.cpp
> >> >    cfe/trunk/test/Misc/warning-flags.c
> >> >    cfe/trunk/test/SemaCXX/cxx0x-initializer-aggregates.cpp
> >> >
> >> > Modified: cfe/trunk/include/clang/Basic/DiagnosticSemaKinds.td
> >> > URL:
> >> >
> http://llvm.org/viewvc/llvm-project/cfe/trunk/include/clang/Basic/DiagnosticSemaKinds.td?rev=150625&r1=150624&r2=150625&view=diff
> >> >
> >> >
> ==============================================================================
> >> > --- cfe/trunk/include/clang/Basic/DiagnosticSemaKinds.td (original)
> >> > +++ cfe/trunk/include/clang/Basic/DiagnosticSemaKinds.td Wed Feb 15
> >> > 16:38:09 2012
> >> > @@ -3550,7 +3550,10 @@
> >> >   "cannot initialize array of type %0 with non-constant array of type
> >> > %1">;
> >> >  def ext_array_init_copy : Extension<
> >> >   "initialization of an array of type %0 from a compound literal of
> type
> >> > %1 is "
> >> > -  "a GNU extension">;
> >> > +  "a GNU extension">, InGroup<GNU>;
> >> > +def ext_array_init_parens : ExtWarn<
> >> > +  "parenthesized initialization of a member array is a GNU
> extension">,
> >> > +  InGroup<GNU>;
> >>
> >> Can you put this in a more specific warning group, and make it
> >> DefaultError?  Since only very new gcc versions accept this, we really
> >> want to discourage anyone from using it.
> >
> >
> > Sure thing. Do you want it in a subgroup of -Wgnu, or do you want for
> > -Wno-gnu to leave this enabled?
>
> -Wno-gnu should probably leave this enabled.  Assuming this issue has
> been reported against gcc, I think they're likely to fix it rather
> than leave it in as an extension.
>

gcc4.6 silently accepts it, and gcc4.7 issues an enabled-by-default warning.
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