Objective-C++ mode for emacs?

[Juha Nieminen]

  Emacs seems to support Objective-C and C++ modes out of the box, but 
there doesn't seem to be an Objective-C++ mode (or if there is, it's 
named unintuitively because I can't find it).

  Neither mode is good for writing Objective-C++. The Objective-C mode 
doesn't understand any C++, and the C++ mode doesn't understand the [] 
blocks of Objective-C (more precisely, it doesn't support the nice 
indentation inside [] blocks that the Objective-C mode supports) nor, 
obviously, the Objective-C keywords.

  Is there an Objective-C++ mode downloadable somewhere? Google was 
unusually unhelpful in this matter (it doesn't understand the "++" part, 
and its reinterpretation of search keywords is sometimes too "smart").