on Sun Apr 01 2012, Abel Sinkovics <abel-AT-elte.hu> wrote:
Hi,
On 01.04.2012, at 21:01, Mathias Gaunard wrote:
On 3/31/2012 7:12 PM, Dave Abrahams wrote:
Hi All,
I am on the C++Now 2012 schedule giving a talk on metaprogramming in C++11, which is really just supposed to be an overview of the state of the art. I am just at the beginnings of my research for this presentation, having learned a few things and done a few experiments, and it seemed to me foolish not to ask the Boost community for its insights. I'm sure y'all have come up with many neat tricks and techniques. If you'd care to share them here, that would be much appreciated. I recall a discussion about processing string literals at compile time using user-defined literals. Surely that counts. Not sure if they didn't remove that feature in the end. They did. The template<char... Chars> operator "" syntax is only valid for integer (and I think floating point) literals according to
On 04/01/2012 06:36 PM, Eric Niebler wrote: the FDIS.
It was me writing about it and we ended up using constexpr functions to achieve the same goal - I sent our solution to this list as well. One can write:
MPLLIBS_STRING("This is cool")
which expands to the definition of a boost::mpl::string. To make usage of it easier, we created an "alias" for MPLLIBS_STRING called _S, so one could write:
_S("This is cool")
Our implementation can be found here: https://github.com/sabel83/mpllibs/blob/master/mpllibs/metaparse/string.hpp It is an important part of the Mpllibs/Metaparse library I'm going to present on C++Now.
It is a C++11-only solution for template metaprogramming, so I think it could be a great addition to an overview about that.
Definitely. An excellent point. I don't suppose one can #include a file inside a string literal somehow? ;-) _S(" #include "metaprogram" ") -- Dave Abrahams BoostPro Computing http://www.boostpro.com