[mlir] [libc] [lld] [libcxxabi] [compiler-rt] [lldb] [llvm] [clang-tools-extra] [libunwind] [libcxx] [clang] [openmp] [flang] [C23] Implement N3018: The constexpr specifier for object definitions (PR #73099)

[Guillot Tony via cfe-commits]

to268 wrote:

I have found no major issues with the C23 `auto` keyword.
There is a minor improvement that I've found in the test cases.

Concerning N3006 (AKA: Underspecified object declarations), I haven't reviewed yet the compatibility with the `constexpr` keyword, since I haven't work much on it yet.  
 

https://github.com/llvm/llvm-project/pull/73099