On 12/06/2014 02:59 p.m., Larry Evans wrote:
On 06/06/14 21:56, Agustín K-ballo Bergé wrote:
On 06/06/2014 11:18 p.m., Louis Dionne wrote:
Hi,
I recently discovered (or maybe not) a neat trick to implement a tuple-like container. The technique has a couple of drawbacks which I will explain later. For a real example, you can see my list implementation in Boost.Hana at [1]. [snip] The idea is to use the capture of the lambda as a fast compiler-generated struct with the desired members. By passing a function to that lambda, we get an access to the unpacked representation of those members and we can then apply any fast algorithm on parameter packs.
We have experimented with lambdas in Spirit.X3 as a way to drastically reduce compile times (although not in the form of tuples),
Are you referring to the make_opaque mentioned here:
http://article.gmane.org/gmane.comp.parsers.spirit.general/26634
or something else? If something else, could we have a peek at it somewhere?
Yes, I was referring to `make_opaque` (and the debate that followed on IRC). The goal was to hide the excessively long symbol names generated by a fusion map of expression templates. Then Joel came up with the idea of representing those maps via ADL instead. Regards, -- Agustín K-ballo Bergé.- http://talesofcpp.fusionfenix.com