[Boost-users] Re: bind forwarding problem

From: David Abrahams (dave_at_[hidden])
Date: 2004-11-16 09:54:33

"Trent Hill" <trent.hill_at_[hidden]> writes:

> Hi all,
>
> I'm running into a compile error using bind with visual c++ 7.1 and am hoping 
> some clever cookie here will be able to help. I've whittled the issue down to 
> a few simple functions (you'll have to trust that it makes sense in the original 
> context):
>
>     template <typename T_Param>
>     void foo(T_Param a_param)
>     {
>     }
>
>     template <typename T_Param>
>     void callFooWith(T_Param a_param)
>     {
>         boost::bind(&foo<T_Param>, a_param)(); // <- (1) ERROR HERE

try:

         boost::bind(&foo<T_Param>, boost::protect(a_param))(); // <- (1) ERROR HERE

Don't forget to #include <boost/bind/protect.hpp>

>     }
>
>     void bar(int)
>     {
>     }
>
>     int main(int a_argc, char *a_argv[])
>     {
>         callFooWith(42);                       // <- (2) FINE
>         callFooWith(boost::bind(&bar, 10));    // <- (3) FAILS
>         return 0;
>     }

-- 
Dave Abrahams
Boost Consulting
http://www.boost-consulting.com