On 7/25/2013 5:10 AM, Mostafa wrote:
On Windows 7/Cygwin, using boost 1.53, preprocessing the following snippet:
pp_array.cc ----------- #include <boost/preprocessor.hpp>
//#define BOOST_PP_TUPLE_REM_0() // nothing
#define ARRAY (3, (a, x, c)) BOOST_PP_ARRAY_REPLACE(ARRAY, 1, b)
via: g++ -E -P -I /... pp_array.cc
gives the following incorrect result: (3, (BOOST_PP_TUPLE_REM_0 () a, b , c))
Uncommenting the pound define in the snippet gives the correct result for the preprocessor.
Is this a bug?
It looks like a bug to me. In your 1.53 version of tuple/rem.hpp add: # define BOOST_PP_TUPLE_REM_0() before the line which says: # define BOOST_PP_TUPLE_REM_1(e0) e0 For some reason, possibly an oversight, Paul removed the "# define BOOST_PP_TUPLE_REM_0()" from tuple/rem.hpp when variadic macro support was added to the preprocessor.