You should generally use this as a last resort. Instead, your source
file suffixes should reflect the language used to compile that source
file. If you need to build a specific file as a specific language
without changing its name, you can also use the Info window for that
file within Xcode to set the language it should be treated as.
the default is according to file extension but u can set it
otherwise. like for cocoa, if u want to be able to include a c++
class ( defined in a .cpp file ) in an objective c or an objective c
++ file u will need to have this set to Objective-C++ for that
work. if xcode is set to compile according to file extension this
would not work.
This is incorrect.
If you want to use a C++ class (by including a C++ header file) in a
Cocoa source file, that Cocoa source file needs to be compiled as
Objective-C++ rather than Objective-C. Thus your Cocoa source file
should have the ".mm" file extension.
You do not need to change the "Compile Source As" build setting in
order for this to work.
-- Chris
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