Re: [Boost-users] [bind] Member fn has defeated me

From: Simon Buchan (simon_at_[hidden])
Date: 2005-10-05 23:48:47

BRIDGES Dick wrote:
<snip>
> 
> Works fine now.  I don't know why I find boost::bind so mysterious,
> but I *WILL* learn!
> 
> Thank you for both the answers and your patience.
> 
> Regards,
> Dick

You find it mysterious because it's not even slightly common outside of 
functional languages.  (I hope Boost can change this).  Basicly: bind is 
a function that creates a function (sortof) from a function and 
arguments.  Confused?  Don't worry, that's normal.  Essentially:

        bind(&X::f, &x, _1);

is the same as:

        f_result_type bound_f(f_arg1_type arg1)
        {	return x.f(arg1);
        }

        // ...

        &bound_f

but with less hassles (ie. x can be local)