A gensym implementation of C/C++ Preprocessor.

gensym.cpp

#define STRINGIFY(x) #x
#define EXTRACT(...) __VA_ARGS__
#define INVOKE(macro,args...)  macro( EXTRACT(args) )

#define FIRST(x,...) x
#define REST(x,...)  __VA_ARGS__

#define __sym(cn,ln) _ainini_##c##cn##l##ln
#define sym(cn,ln) __sym(cn,ln)
#define __gensym(cn, ln) sym( cn,ln ) 

//@TODO: IMPLEMENT A `__COUNTER__` TO FIT C/CPP STANDARDS
#define gensym() __gensym(__COUNTER__, __LINE__)

struct fck{
    explicit fck(int a = 0){}
};

TestCase(GENSYM){
    int gensym() = 1;fck gensym()(2); 
}