imagine I have a bunch of C++ related classes (all extending the same base class and providing the same constructor) that I declared in a common header file (which I include), and their implementations in some other files (which I compile and link statically as part of the build of my program).

I would like to be able to instantiate one of them passing the name, which is a parameter that has to be passed to my program (either as command line or as a compilation macro).

The only possible solution I see is to use a macro:

#ifndef CLASS_NAME
#define CLASS_NAME MyDefaultClassToUse
#endif

BaseClass* o = new CLASS_NAME(param1, param2, ..);

Is it the only valuable approach?

c++ class macros
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