On 03/02/2017 11:27 AM, Peter Dimov via Boost wrote:
Larry Evans wrote:
One problem with the above cppljevans mpl is there's no at.hpp. Instead, the non-variadic boost/mpl/at.hpp was used. The reason no variadic at was created was because, AFAICT, there was no non-recursive method for picking the I-th element from T... , and, IIUC, recursive templates cause compile-time slow downs.
Have you read
http://pdimov.com/cpp2/simple_cxx11_metaprogramming_2.html
?
Nope. Thanks *very much* for the link. I'm impressed (especially with the way you actually cited the parts of the standard to guide your search for the best method!).
Search for mp_at.
Thanks for that tip. I'm a bit surprised that the mp_map_from_list was fastest. I would have thought that large template classes mean slow compile times, but I guess not. Thanks again, Peter. -regards, Larry