On 1/17/2010 10:02 PM, Hicham Mouline wrote:
Hello,
I have a struct params { ... };
and I have adapted it as a fusion sequence.
However I can't construct a params from a boost::fusion::vector<> with the same types.
const params p( v ); // v is a fusion::vector with the same type const params p = v; // both failed to compile
Of course you can't, unless your struct params has a template constructor that accepts fusion sequences -- that's easy enough to do. Keep in mind that the adapt macro is non-intrusive. What happens in your struct is your business.
Do I need to actually write a specific ctor for params?
Yes.
Will it change the result of the adapt macro?
No.
Can I iterate with an algorithm over the vector at runtime to assign to p from v? with fusion::for_each() I couldn't write the functor that would let me assign to p.
Yep. Perhaps you can use zip_view to iterate both sequences in parallel. E.g. for_each(zip(p, v), f). Regards, -- Joel de Guzman http://www.boostpro.com http://spirit.sf.net http://www.facebook.com/djowel Meet me at BoostCon http://www.boostcon.com/home http://www.facebook.com/boostcon