[PATCH] D111400: [Clang] Implement P2242R3

[Hubert Tong via Phabricator via cfe-commits]

hubert.reinterpretcast added inline comments.


================
Comment at: clang/test/SemaCXX/constant-expression-cxx2b.cpp:101
+
+  auto b = [](int n) constexpr {
+    if (!n)
----------------
I think a lambda marked `constexpr` and one that isn't has fundamental differences in behaviour in relation to this patch. As noted in previous comments, the `constexpr` case warns and then allows the lambda to be called in constant evaluation. The other case produces no message for the lambda definition itself and does not allow the lambda to be called in a `constexpr` context (even if the control flow is accepted by C++2b).


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D111400/new/

https://reviews.llvm.org/D111400