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# preprocessor

Almost the same as the C one:

http://stackoverflow.com/questions/5085533/is-a-c-preprocessor-identical-to-a-c-preprocessor

The major differences are the predefined macros.

#include "common.hpp"

int main() {

# Standard preprocessor macros

{

# __cplusplus

Defined only if using C++ compiler.

Its value is the actual C++ version in use in a similar way to __STDC_VERSION__

Values:

- C++98: 199711L

- C++11: 201103L

C99 says that the C compiler must not define it.

{

std::cout << "__cplusplus = " << __cplusplus << std::endl;

#if __cplusplus >= 201103L

std::cout << "C++11 code" << std::endl;

#endif

}

#ifdef __STDCPP_THREADS__

// TODO why not defined even though I do have multithreading?

std::cout << "__STDCPP_THREADS__" << __cplusplus << std::endl;

assert(__STDCPP_THREADS__ == 1);

#endif

}