Larry Evans wrote:
On 05/07/2006 02:19 PM, João Abecasis wrote:
where f is a functor or function pointer and seq is a fusion Sequence. [snip] The effect is that of invoking f with each element of seq as an argument.
The last statement might be interpreted to mean:
typedef boost::fusion::vector<object, int> vector2; vector2 v2(o, 17);
unpack_args(f,v2) == vector2(f(o),f(17))
instead of:
unpack_args(f,v2) == f(o,17)
How about: seq - a model of Forward Sequence f - a N-ary functor or function pointer, with N = result_of::size<Seq>::value Semantics: returns the result of invoking n-ary f, using the elements of seq as arguments. ?
BTW, the purpose of unpack_args would be easier to see if the actual tests were more like:
BOOST_TEST(f(o,17) == unpack_args( f , v2 ));
instead of:
BOOST_TEST(f.get() - 17 == unpack_args( f , v2 ));
Then the reader would just have to look at the v2 declaration:
vector2 v2(o, 17);
to see the purpose, IMHO.
I guess I didn't write that test thinking that it would get used as documentation... :-( It seems I should. I'll give it another try soonish. Thanks for your comments, João