Paul Mensonides wrote: > > I think, that using the PP library will give us the possibility to > > configure the maximum number of required sizetype typedefs. I've > > attached a version of the yes_no_type.hpp, which does so by > defining a > > constant 'BOOST_MAX_SIZETYPE_COUNT' if this constant isn't already > > predefined by the user. > > > > Regards Hartmut > > Just a small point, you should include > <boost/preprocessor/repetition/repeat.hpp> after your normal > include guard. > While it won't change the result, it is a waste of time to > include it prior > to the include guard. One other slight problem is that > BOOST_PP_REPEAT goes > from 0 to N, which will cause you to get this declaration: > > typedef char (&size0_t)[0]; > > ...which is illegal.
Thanks for pointing this out. I'm only at the beginning with the PP library. > Separately, I don't particularly think that this is a good use of the > pp-lib. You can achieve the effect you want easily: > > template<int I> struct size_descriptor { > typedef char (& type)[I]; > }; > > typedef size_descriptor<1>::type yes_type; > typedef size_descriptor<2>::type no_type; > > ...or something similar, which solves the problem once and for all. Nice idea. Regards Hartmut _______________________________________________ Unsubscribe & other changes: http://lists.boost.org/mailman/listinfo.cgi/boost