[c++20] Implement P1009R2: allow omitting the array bound in an array

new expression.

This was voted into C++20 as a defect report resolution, so we
retroactively apply it to all prior language modes (though it can never
actually be used before C++11 mode).

llvm-svn: 360006

1 files changed, 6 insertions, 0 deletions

diff --git a/clang/test/PCH/cxx-exprs.cpp b/clang/test/PCH/cxx-exprs.cpp
index b7707e0b934..e02bb0aa056 100644
--- a/clang/test/PCH/cxx-exprs.cpp
+++ b/clang/test/PCH/cxx-exprs.cpp
@@ -20,10 +20,16 @@ public:
   }
 };
 
+template<typename ...T> int *arr_new(T ...v) {
+  return new int[]{v...};
+}
+
 #else
 
 New<int> *clone_new(New<int> *n) {
   return n->clone();
 }
 
+int *use_arr_new = arr_new(1, 2, 3);
+
 #endif