#include <new>
#include <utility>
 
// This macro is variadic in order to directly support operator,
#define BOOST_AUTO_FUNCTION( ... ) auto __VA_ARGS__ -> BOOST_AUTO_FUNCTION_IMPL
 
#define BOOST_AUTO_VOID_FUNCTION( ... )                                        \
auto __VA_ARGS__ -> BOOST_AUTO_VOID_FUNCTION_IMPL
 
// Variadic to support expressions with commas not between parentheses