Add -f[no-]declspec to control recognition of __declspec as a keyword

In versions of clang prior to r238238, __declspec was recognized as a keyword in
all modes.  It was then changed to only be enabled when Microsoft or Borland
extensions were enabled (and for CUDA, as a temporary measure).  There is a
desire to support __declspec in Playstation code, and possibly other
environments.  This commit adds a command-line switch to allow explicit
enabling/disabling of the recognition of __declspec as a keyword.  Recognition
is enabled by default in Microsoft, Borland, CUDA, and PS4 environments, and
disabled in all other environments.

Patch by Warren Ristow!

llvm-svn: 249279

1 files changed, 1 insertions, 0 deletions

diff --git a/clang/lib/Format/Format.cpp b/clang/lib/Format/Format.cpp
index d8a15e4..fffd80c 100644
--- a/clang/lib/Format/Format.cpp
+++ b/clang/lib/Format/Format.cpp
@@ -1826,6 +1826,7 @@ LangOptions getFormattingLangOpts(const FormatStyle &Style) {
   LangOpts.ObjC1 = 1;
   LangOpts.ObjC2 = 1;
   LangOpts.MicrosoftExt = 1; // To get kw___try, kw___finally.
+  LangOpts.DeclSpecKeyword = 1; // To get __declspec.
   return LangOpts;
 }