macOS Can I use c++ files within a cocoa/carbon application?

[paulmcco]

I have written a program in c++...it includes a bunch of header files and whatnot...I would like to build a user interface for this project using cocoa...can this be done? do I use a carbon application? would I have to re-write my c++ project at all?

I would like to use cocoa because the interface can have more objects...how different are objective C files(.m)...is it possible to incorporate the two different languages?

 

[petermopar]

use .mm and -ObjC++

i've found yes, i can use c++ files in my obj-c wrapper.
two steps, rename your main.m -> main.mm
and if using gcc from command line, change -ObjC -> -ObjC++
i think xcode changes over automatically if you just change the extension.

i declare my classes completely in their .h files, so i don't know how the linker treats .cpp objects, what flags you need to integrate them right.

 

[jiminaus]

GCC itself will determine the language from the source code extension. There's no need to add -ObjC or -ObjC++. Just name you source files .m or .mm respectively.

 

[petermopar]

obj-c and c files

thnx so much to jiminaus for making the info flow!
from a noob POV, looks like obj-c and c++ can be used side by side within a c method such as main().

but of course i don't go passing obj-c instantiations to c++ and vice versa...

i think of obj-c as java, although it is said that its VM is "thinner, very thin layer", but still it is more like bytecode than c++ which retains a "reality" to its pointers to actual realms within the SRAM... ocj-c is more like the "HANDLE system of win-32 programming?

 

[Catfish_Man]

thnx so much to jiminaus for making the info flow!
from a noob POV, looks like obj-c and c++ can be used side by side within a c method such as main().

but of course i don't go passing obj-c instantiations to c++ and vice versa...

i think of obj-c as java, although it is said that its VM is "thinner, very thin layer", but still it is more like bytecode than c++ which retains a "reality" to its pointers to actual realms within the SRAM... ocj-c is more like the "HANDLE system of win-32 programming?

You can have pointers ObjC objects in C++, and vice versa. ObjC++ will even call the constructors and destructors of C++ instance variables of ObjC classes for you.

There's no bytecode, no difference between pointers in ObjC and C++. Your perception is mistaken.

 

[stellardream]

i think of obj-c as java, although it is said that its VM is "thinner, very thin layer", but still it is more like bytecode than c++ which retains a "reality" to its pointers to actual realms within the SRAM... ocj-c is more like the "HANDLE system of win-32 programming?

Clang/LLVM isn't anything like JVM >.< Where do people get that?

ObjC compiles into native code with Clang/LLVM not some sort of bytecode. LLVM JIT was only used for OpenGL.