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preprocessor.cpp
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preprocessor.cpp
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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
}
}