namespace v1 { template < BOOST_PP_ENUM_PARAMS_WITH_A_DEFAULT( MPLLIBS_LIMIT_COMPOSE_SIZE, class F, boost::mpl::na ) > struct compose; template <> struct compose< BOOST_PP_ENUM( MPLLIBS_LIMIT_COMPOSE_SIZE, boost::mpl::na BOOST_PP_TUPLE_EAT(3), ~ ) > { typedef compose type; template <class T> struct apply { typedef T type; }; }; #ifdef MPLLIBS_COMPOSE_CASE # error MPLLIBS_COMPOSE_CASE already defined
#include <boost/preprocessor/punctuation/paren.hpp> #include <boost/preprocessor/tuple/eat.hpp> #define _MAX_ARGS 64 /* Python code for generating The TF_ARG_N() macros: for i in range(1, 32+1): line = '#define TF_ARG_%d(' % i for j in range(1, i): line += '_%d,' % j line += '_%d,...) _%d' % (i, i) print(line) */ // Make sure TF_ARG_N() supports at least BOOST_PP_LIMIT_TUPLE arguments. #define _TF_ARG_ERROR(a, b, c) #define _TF_ARG_TUPLE_OVERFLOW(a, b, c) BOOST_PP_IIF(BOOST_PP_EQUAL(1, \ BOOST_PP_EXPAND(BOOST_PP_CAT(TF_ARG_, _MAX_ARGS) BOOST_PP_LPAREN() \ _TF \ BOOST_PP_REPEAT(BOOST_PP_SUB(_MAX_ARGS, 2), _TF_NUM_ARGS_REP, _TF) \ BOOST_PP_COMMA() 1 BOOST_PP_RPAREN())), \ BOOST_PP_TUPLE_EAT(1), _TF_ARG_ERROR)(...) BOOST_PP_IIF(BOOST_PP_GREATER_EQUAL(_MAX_ARGS, BOOST_PP_LIMIT_TUPLE), \ BOOST_PP_TUPLE_EAT(1), _TF_ARG_TUPLE_OVERFLOW)(...) #endif