Generate include file name in a macro

Question

I\'m trying to generate include file name in macro. This is supposed to be legal in C++:

#define INCLUDE_FILE \"module_impl_win.hpp\"
#include INCLUDE_FILE
<         


        

Answer 1

You can also use Boost Preprocessor, especially the BOOST_PP_STRINGIZE/BOOST_PP_CAT macros:

#include 
#include 

#define INCLUDE_FILE(M) BOOST_PP_STRINGIZE(BOOST_PP_CAT(M, _impl_win.hpp))

// expands to: #include "module_impl_win.hpp"
#include INCLUDE_FILE(module)

(cf. C Macro - Dynamic #include)

Note that this suffers from the same problem as @Andrew's answer (leading underscore = reserved identifier).