commit c667cdc850c2aa821ffeedbc08c24bc985c59edd
author Richard Smith <richard-llvm@metafoo.co.uk> Wed Sep 18 17:37:44 2019 +0000
committer Richard Smith <richard-llvm@metafoo.co.uk> Wed Sep 18 17:37:44 2019 +0000
tree c0ee14f77a8bf3bcc8485bae5c413767ba09cd35
parent e406a3f2d64ca3a047d7289add5932bd41e881a4

[c++20] P1331R2: Allow transient use of uninitialized objects in
constant evaluation.

llvm-svn: 372237

clang/lib/AST/DeclCXX.cpp

diff --git a/clang/lib/AST/DeclCXX.cpp b/clang/lib/AST/DeclCXX.cpp
index 4939c37..bcc2238 100644
--- a/clang/lib/AST/DeclCXX.cpp
+++ b/clang/lib/AST/DeclCXX.cpp
@@ -1263,7 +1263,8 @@
     } else {
       // Base element type of field is a non-class type.
       if (!T->isLiteralType(Context) ||
-          (!Field->hasInClassInitializer() && !isUnion()))
+          (!Field->hasInClassInitializer() && !isUnion() &&
+           !Context.getLangOpts().CPlusPlus2a))
         data().DefaultedDefaultConstructorIsConstexpr = false;
 
       // C++11 [class.copy]p23: