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

5 Oct 2005

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-----Original Message-----
From: boost-users-bounces@lists.boost.org 
[mailto:boost-users-bounces@lists.boost.org] On Behalf Of Peter Dimov
Sent: Wednesday, October 05, 2005 10:41 AM
To: boost-users@lists.boost.org
Subject: Re: [Boost-users] [bind] Member fn has defeated me
BRIDGES Dick wrote:
...
...
BRIDGES Dick wrote:
...
class Bar {
 typedef void (*pf)(bool);
If you make this
typedef boost::function pf;
[snip]
...
then
Bar bar_( boost::bind(&X::f, &x) );
should work. But you can't get an oridnary function pointer from
boost::bind; a function pointer doesn't have enough state to
represent &X::f + &x.

[...]
I omitted too much of the context, sorry ;-) For
struct X
{
  void f(bool b) {}
}
the correct thing would be to use boost::bind(&X::f, &x, _1) 
so that the 
bool argument from pf (the first input argument is _1 in bind 
notation) can 
be passed to X::f.
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