Re: [boost] Nested Boost Binds

From: Peter Dimov (pdimov_at_[hidden])
Date: 2006-02-08 16:22:27

Sergey Lukin wrote:

> But when I try to perform indirect call of Print1 from Method1 which
> is called by a timer compiler reports a lot of bugs in the
> boost::bind code (see part of the log)
> t.async_wait(boost::bind(boost::bind(Component::Method1, &y, 10,
> boost::bind (DPC::Print1, &x, 2)), &t));
> or
> t.async_wait(boost::bind(Component::Method1, &y, 10, boost::bind
> (DPC::Print1, &x, 2), &t));

You need to prevent the inner bind from being treated as a subexpression of 
the outer bind. Either assign it to a function<>:

boost::function<void()> f = boost::bind( DPC::Print1, &x, 2 );
t.async_wait( boost::bind( Component::Method1, &y, 10, f ) );

or use boost::protect, as explained at the end of

http://boost.org/libs/bind/bind.html#nested_binds