On Sat, 17 Dec 2011 12:45:26 -0800, lcaminiti wrote:
Hello all,
Why does Boost.Preprocessor redefines BOOST_PP_VARIAIDCS instead of just using BOOST_NO_VARIADIC_MACROS from Boost.Config?
The pp-lib requires more than just superficial variadic macro support. I.e. BOOST_PP_VARIADICS macro is stronger.
Furthermore, GCC supports variadics also when C++11 extensions are not enabled so I think the following should not && __GXX_EXPERIMENTAL_CXX0X__:
// File: boost/preprocessor/config/config.hpp # /* Wave (C/C++), GCC (C++) */ # elif defined __WAVE__ && __WAVE_HAS_VARIADICS__ || defined __GNUC__ && __GXX_EXPERIMENTAL_CXX0X__ # define BOOST_PP_VARIADICS 1
Because it isn't standard C++98. It can be enabled via a command line definition of BOOST_PP_VARIADICS. It is enabled by default (on GCC) when in C++11 mode. I believe that GCC 4.7 actually finally defines __cplusplus correctly as well. -Paul