Re: [boost] [function] Documentation suggestion (FAQ)

Subject: Re: [boost] [function] Documentation suggestion (FAQ)
From: Cromwell Enage (sponage_at_[hidden])
Date: 2013-02-04 00:52:47

Evan Driscoll wrote:
> In other words, I was doing
>    void backing_func() {...}
>    boost::function<void()> func(backing_func);
> 
>    void foo(function<void()> callback) {
>        if (callback == func) {
>            fast_foo();
>        } else {
>            slow_foo(callback);
>        }
>    }
> but by changing the if statement condition to
>     if (callback == &backing_func)
> everything is fine and dandy.
> 
> 
> My suggestion is that the FAQ entry at
> http://www.boost.org/doc/libs/1_52_0/doc/html/function/faq.html
> should be updated to point out that there IS a way to do this
> specific case.  If everyone read the whole docs and remembered
> them perfectly this wouldn't be a problem, but of course those
> statements are probably true of exactly no one. :-) I stumbled
> across the FAQ entry, which I feel strongly suggests that what I
> want to do is impossible.

I usually read the tutorials before the FAQ.  I found your specific case here: <http://www.boost.org/doc/libs/1_53_0/doc/html/function/tutorial.html#idp58429792>  That section describes the types of functions against which a boost::function is equality-comparable.

A little repetition might not hurt in this case, though.

Cromwell D. Enage