[PATCH] c++: add feature-test macro for auto(x)

[Jakub Jelinek]

On Mon, May 15, 2023 at 11:41:46AM -0400, Jason Merrill via Gcc-patches wrote:
> On 5/15/23 11:24, Patrick Palka wrote:
> > This adds the feature-test macro for PR0849R8, as per
> > https://github.com/cplusplus/CWG/issues/281.
> > 
> > Tested on x86_64-pc-linux-gnu, does this look OK for trunk/13?
> 
> OK.

https://gcc.gnu.org/projects/cxx-status.html#cxx23 lists it already in 12,
shouldn't that go to 12 branch as well?
> 
> > gcc/c-family/ChangeLog:
> > 
> > 	* c-cppbuiltin.cc (c_cpp_builtins): Predefine __cpp_auto_cast
> > 	for C++23.
> > 
> > gcc/testsuite/ChangeLog:
> > 
> > 	* g++.dg/cpp23/feat-cxx2b.C: Test __cpp_auto_cast.

	Jakub