I want to have some way to automatically put the right number of close parentheses on a list (using boost/preprocessor.hpp). For instance, given this list: #define _THE_LIST \ BOOST_PP_LIST_CONS(red, \ BOOST_PP_LIST_CONS(orange, \ BOOST_PP_LIST_CONS(yellow, \ BOOST_PP_LIST_CONS(green, \ BOOST_PP_LIST_CONS(blue, \ BOOST_PP_LIST_CONS(violet, \ BOOST_PP_LIST_CONS(gray, \ BOOST_PP_LIST_CONS(white, \ BOOST_PP_LIST_NIL )))))))) is there a way to automatically generate the eight close parentheses?