On Thu, 30 Jan 2003 12:20:32 -0000, "John Maddock" <[EMAIL PROTECTED]> wrote:
>> I see that you haven't replied to this for long time now. So either >> you are bored from the question, or it wasn't clear enough. To see if >> it is the second case I thought to reformulate it: > >Well only for a day and a bit, sorry just busy :-( Oops, I think I've to tune up my biological clock sorry :-) Maybe I saw that you were replying in other threads but not in this one, or maybe I was just eager to have a reply and thought it was long time that I hadn't one. No intent to nag you, anyway. >> Can you show, with an example, why the code used for named template >> arguments can't reasonably use an expression? > >It doesn't have access to one, only a type: the usage is take some template >parameter, see if it is convertible to some policy type, and if it is, then >extract the policy information. > >John Maddock >http://ourworld.compuserve.com/homepages/john_maddock/index.htm > The technique I know relies on detecting whether the template argument is *derived* from some policy, and that's doable with expressions. That's why I asked you what was the exact technique you were using. Also, if you have any (other) example where "convertibility of a type" is needed I would be glad to see it, because this is IMHO a crucial point. Genny. _______________________________________________ Unsubscribe & other changes: http://lists.boost.org/mailman/listinfo.cgi/boost
