[flang] [llvm] [clang] [lld] [libcxx] [lldb] [clang-tools-extra] [libc] [OpenACC] Initial commits to support OpenACC (PR #70234)

[Alexey Bataev via cfe-commits]

================
@@ -229,6 +230,9 @@ class Parser : public CodeCompletionHandler {
   /// Parsing OpenMP directive mode.
   bool OpenMPDirectiveParsing = false;
 
+  /// Parsing OpenACC directive mode.
+  bool OpenACCDirectiveParsing = false;
----------------
alexey-bataev wrote:

I think better to introduce it with the patch that actually relies on it, currently better to remove it.

https://github.com/llvm/llvm-project/pull/70234