id	summary	reporter	owner	description	type	status	milestone	component	version	severity	resolution	keywords	cc
3442	tracking level etc. for templates	anonymous	Robert Ramey	"changing the tracking level/class implementation for tempaltes is very tedious to write and reveals implementation details to the user, so I'm suggesting the following macro:

template<class T,int i> class mytype{};

BOOST_CLASS_TRACKING_TEMPLATE(mytype,2,(class,int),track_never);

the implementation is fairly simple:

#define TYPE_TO_PAR(R,DATA,I,ELEM) (ELEM _A##I)
#define PAR_SEQ(NR,PARS) BOOST_PP_SEQ_FOR_EACH_I(TYPE_TO_PAR,0,BOOST_PP_TUPLE_TO_SEQ(NR,PARS))
#define PARS(NR,PARS) BOOST_PP_SEQ_ENUM(PAR_SEQ(NR,PARS))
#define ARGS(NR) BOOST_PP_ENUM_PARAMS(NR,_A)

#define BOOST_CLASS_TRACKING_TEMPLATE(T,NR,P,TRACKING) \
template<PARS(NR,P)>
struct tracking_level<T<ARGS(NR)> >
{
    typedef mpl::integral_c_tag tag;
    typedef mpl::int_<TRACKING> type;
    BOOST_STATIC_CONSTANT(
        int, 
        value = tracking_level::type::value
    );
};
"	Feature Requests	closed	Boost 1.41.0	serialization	Boost 1.40.0	Cosmetic	wontfix