Mathias Gaunard wrote:
In C++0x, begin and end are supposed to be found through ADL, and this might end up considering fusion::begin/fusion::end as possible overloads.
Unfortunately, this breaks, as fusion::begin and fusion::end produce hard errors when passed something else than a fusion sequence.
All in all, I find ADL very dangerous. Should it be advocated not to use the names "begin" and "end" for something else than ranges to avoid issues? I suppose that for Fusion, it could be possible to use SFINAE to mask the overloads if the arguments aren't fusion sequences.
Hmmm...that's unfortunate that C++0x decided to "usurp" use of begin/end, seeing as how it's established practice (isn't it?) that those functions could be meaningful outside the context of ranges. Seems to me that Boost.Range's lookup via ADL of range_begin and range_end makes more sense... - Jeff