shunsuke wrote:
Joel de Guzman wrote:
shunsuke wrote:
Hi,
I'm trying to fix ticket #1396: http://svn.boost.org/trac/boost/ticket/1396 Any hint? I just replied to that in the ticket :-) HTH.
Hmm, your `identity` implementation seems wrong. `result<Fun(int)>` invocation means that the argument is rvalue by the definition of result_of behavior. Therefore, you can't return mutable reference to `int`.
Well, it's just for that specific case. Did you intend the transform to be generic? I didn't think so when you had it hard coded to int. I guess, it really depends on what your intent is. A transform cannot, in general, return a reference. What if the input is computed on the fly, like, say: mpl::vector_c<int, 1, 2, 3> ? Regards, -- Joel de Guzman http://www.boost-consulting.com http://spirit.sf.net