Re: [Boost-users] problem using function lib in MSVC6

From: Douglas Gregor (gregod_at_[hidden])
Date: 2003-11-22 12:53:32

On Friday 21 November 2003 05:33 pm, Kim wrote:
> Can't get an example similar to the one found in the tutorial to work.
>
> // *************************************
> #include <boost/function.hpp>
> #include <functional>
>
> struct X
> {
>    int foo(int v) { return v;}
> };
>
> int main(int argc, char* argv[])
> {
>     boost::function1<int, int> f;
>     X x;
>     f =    std::bind1st
>             (
>                 std::mem_fun(&X::foo),
>                 &x
>              );
>     f(5); // Call x.foo(5)
>     return 0;
> }
>
> //***************************************
>
> I get this error message:
> : error C2784: 'class std::mem_fun_t<_R,_Ty> __cdecl std::mem_fun(_R
>
> (__thiscall _Ty::*)(void))' : could not deduce template argument for
> '<Unknown>' from 'int (__thiscall X::*)(int)'

I believe this is actually a bug in the standard library that ships with MSVC 
6.0. I suggest you use Boost.Bind instead:
  f = boost::bind(&X::foo, &x, _1);

        Doug