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#include <boost/preprocessor/repetition/enum_trailing_params.hpp> #include <boost/preprocessor/repetition/repeat.hpp> #define MACRO(z, n, _) \ template< \ class BOOST_PP_ENUM_TRAILING_PARAMS_Z(z, n, class T) \ > class X ## n { \ /* ... */ \ }; \ /**/ BOOST_PP_REPEAT(2, MACRO, nil) /* template<class> class X0 { }; template<class, class T0> class X1 { }; に展開される */