C Language: What Does The. Mm Extension Stand for?
A Project with Some Objective-C Has a Few C Classes with the Implementation Files Having A. Mm Extension. File. H File. Mm What Does The. Mm Mean? Shouldn't It...
A project with some Objective-C has a few C classes with the implementation files having a .mm extension.
file.h
file.mm
What does the .mm mean? Shouldn't it just be .m?
3 Answers
The extension .mm is the extension for the C++ compilation unit expected by the Objective-C compiler, while the .m extension is the extension for the C compilation unit expected by the Objective-C compiler.
That's assuming you don't use a compiler flag to override the file extension, as this gentleman has done.
Objective C++, mixes C++ and Objective C.
.mm files are like .cpp files to the Objective-C compiler. They activate the C++ compiler instead of the C compiler.
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