Add FINAL and OVERRIDE macros for C++11 final/override.

Add FINAL and OVERRIDE macros for C++11 final/override.

We also use new the constant naming scheme for Yield::Kind values to avoid
clash with the FINAL macro.

R=svenpanne@chromium.org

Committed: https://code.google.com/p/v8/source/detail?r=16222

[Benedikt Meurer, 2013-08-19 07:34:19]

PTAL

[Benedikt Meurer, 2013-08-19 08:11:18]

Danno, here's the FINAL/OVERRIDE CL just mentioned.

[Benedikt Meurer, 2013-08-19 09:01:41]

On 2013/08/19 08:11:18, Benedikt Meurer wrote:
> Danno, here's the FINAL/OVERRIDE CL just mentioned.

The FINAL/OVERRIDE macros expand to empty unless C++11 is enabled explicitly,
i.e. using CXXFLAGS=-std=c++11 with clang++ or a recent GCC.

[Sven Panne, 2013-08-19 12:44:47]

https://codereview.chromium.org/23098004/diff/1/src/globals.h
File src/globals.h (right):

https://codereview.chromium.org/23098004/diff/1/src/globals.h#newcode382
src/globals.h:382: #if __cplusplus >= 201103L
Looking at Chrome's base/compiler_specific.h, I think we can use it more often:
MSVC supports this for ages (VS2005 at least) and clang supports it. Checking
the C++ version should be used as a fallback.

https://codereview.chromium.org/23098004/diff/1/src/globals.h#newcode394
src/globals.h:394: #if __cplusplus >= 201103L
Same here: For MSVC we can fall back to 'sealed', clang has it, otherwise check
C++ version.

[Benedikt Meurer, 2013-08-19 14:31:06]

On 2013/08/19 12:44:47, Sven Panne wrote:
> https://codereview.chromium.org/23098004/diff/1/src/globals.h
> File src/globals.h (right):
> 
> https://codereview.chromium.org/23098004/diff/1/src/globals.h#newcode382
> src/globals.h:382: #if __cplusplus >= 201103L
> Looking at Chrome's base/compiler_specific.h, I think we can use it more
often:
> MSVC supports this for ages (VS2005 at least) and clang supports it. Checking
> the C++ version should be used as a fallback.
> 
> https://codereview.chromium.org/23098004/diff/1/src/globals.h#newcode394
> src/globals.h:394: #if __cplusplus >= 201103L
> Same here: For MSVC we can fall back to 'sealed', clang has it, otherwise
check
> C++ version.

Done.

PTAL

[Benedikt Meurer, 2013-08-19 14:43:38]

PTAL

[Sven Panne, 2013-08-19 14:45:54]

lgtm

[Benedikt Meurer, 2013-08-19 14:46:46]

Committed patchset #3 manually as r16222.