Steven Watanabe wrote: <snip>
functional/forward_adapter won't work since it hides function parameters, it only lets you operate with the function.
What do you mean by "hides function parameters"?
Sorry I was unclear. What I mean was that forward_adapter doesn't let you intercept the actual function call. You can store the inner functor in the wrapper which allows a delayed call, but whenever someone calls wrapper(prms...), you won't have a chance to intercept that call. Of course, as you suggest below, one could inject one's own functor in between the inner functor and the forward_adapter, but then one is left to deal with how to solve forwarding problem on one's own.
It looks like it may be possible to do that by using boost/preprocessor I'll have to generate a whole lot of overloads with O(2^N) (because of the overload on (T &) or (T const &) for every argument). But it looks pretty dounting. It's basically what forward_adapter had to do.
Isn't there a ready-made library that would allow me to generate all of the overloads?
Just define your wrapper to take references, and wrap it in forward_adapter. This should have exactly the same effect as defining all the overloads yourself.
Correct me if I'm wrong, but I think it's not going to work when the inner functor has (T const &) parameter. If my wrapper declares everything T &, then it won't be able to accept non-const rvalues whereas the original functor was able to do that.
In Christ, Steven Watanabe
Thanks, Andy.