[c++2a] Add option -std=c++2a to enable support for potential/transitional C++2a features
- as usual C++2a implies all the C++'s that came before it.
Thank you Aaron for the feedback here: https://reviews.llvm.org/D35454
llvm-svn: 308118
diff --git a/clang/test/Driver/unknown-std.cpp b/clang/test/Driver/unknown-std.cpp
index 4f7a5e6..195a671 100644
--- a/clang/test/Driver/unknown-std.cpp
+++ b/clang/test/Driver/unknown-std.cpp
@@ -15,6 +15,8 @@
// CHECK-NEXT: note: use 'gnu++14' for 'ISO C++ 2014 with amendments and GNU extensions' standard
// CHECK-NEXT: note: use 'c++1z' for 'Working draft for ISO C++ 2017' standard
// CHECK-NEXT: note: use 'gnu++1z' for 'Working draft for ISO C++ 2017 with GNU extensions' standard
+// CHECK-NEXT: note: use 'c++2a' for 'Working draft for ISO C++ 2020' standard
+// CHECK-NEXT: note: use 'gnu++2a' for 'Working draft for ISO C++ 2020 with GNU extensions' standard
// CUDA-NEXT: note: use 'cuda' for 'NVIDIA CUDA(tm)' standard
// Make sure that no other output is present.