[all-commits] [llvm/llvm-project] 63c5a4: [Clang] Fix constexpr-ness on implicitly deleted d...

[A. Jiang via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 63c5a422f07da9925a4700f54016ab8623567718
      https://github.com/llvm/llvm-project/commit/63c5a422f07da9925a4700f54016ab8623567718
  Author: A. Jiang <de34 at live.cn>
  Date:   2024-11-28 (Thu, 28 Nov 2024)

  Changed paths:
    M clang/docs/ReleaseNotes.rst
    M clang/include/clang/AST/DeclCXX.h
    M clang/lib/AST/DeclCXX.cpp
    M clang/test/AST/ByteCode/cxx23.cpp
    M clang/test/SemaCXX/literal-type.cpp

  Log Message:
  -----------
  [Clang] Fix constexpr-ness on implicitly deleted destructors (#116359)

In C++20, a defaulted but implicitly deleted destructor is constexpr if
and only if the class has no virtual base class. This hasn't been
changed in C++23 by P2448R2.

Constexpr-ness on a deleted destructor affects almost nothing. The
`__is_literal` intrinsic is related, while the corresponding
`std::is_literal_type(_v)` utility has been removed in C++20. A recently
added example in `test/AST/ByteCode/cxx23.cpp` will become valid, and
the example is already accepted by GCC.

Clang currently behaves correctly in C++23 mode, because the
constexpr-ness on defaulted destructor is relaxed by P2448R2. But we
should make similar relaxation for an implicitly deleted destructor.

Fixes #85550.



To unsubscribe from these emails, change your notification settings at https://github.com/llvm/llvm-project/settings/notifications