--- Stephen Gross wrote:

(1) Where can I find reference information for mpl::for_each (I've looked around on the boost website and can't seem to find it).

(2) Here's what I'm trying to do: I've got an mpl::vector. Given some type T, I want to loop across the vector and see if T is convertible to any of the types in the vector. I tried something like 'for_each >()' but my syntax is definitely wrong. Any ideas?

Thanks in advance, --Steve

Stephen Gross Case Western School of Medicine Cleveland, OH

You can use fold in this case. So it could be something like this: template< typename Sequence, typename T > struct find_convertible : fold< Sequence, void_, if_< is_void_< _1 >, is_convertible< T, _2 >, _1 > {}; is_convertible shall return void_ in case it cannot convert for this to work (you can use different type, but need to change initial value and if statement accordingly). I made a suggestion to make such algorithm available in the lib. But it is possible it can be simply implemented through already existing algorithms. Regards, Vyacheslav

Stephen Gross writes:

(1) Where can I find reference information for mpl::for_each (I've looked around on the boost website and can't seem to find it).

I'm afraid it's missing from the reference docs.

(2) Here's what I'm trying to do: I've got an mpl::vector. Given some type T, I want to loop across the vector and see if T is convertible to any of the types in the vector.

!is_same< find_if< seq, is_convertible >::type , end<seq>::type >::value ?

I tried something like 'for_each

...

()' but my syntax is definitely wrong. Any ideas?

Unless I misunderstood your needs, something like the above should work for you. 'for_each' is the only run-time iteration algorithm in the library, and it's probably not what you want here. In absense of better docs at the moment, you can read chapter 4 of http://www.boost.org/libs/mpl/doc/paper/mpl_paper.pdf to get an idea what's 'for_each' is about. HTH, -- Aleksey Gurtovoy MetaCommunications Engineering