Re: checked_delete issue

From: Gennadiy E. Rozental (rogeeff_at_[hidden])
Date: 2001-10-03 14:10:02

--- In boost_at_y..., Jens Maurer <Jens.Maurer_at_g...> wrote:
> "Gennadiy E. Rozental" wrote:
> > 
> > Hi,
> > 
> > currently checked_delete can't be used with algorithms. For 
example,
> > 
> > for_each( col.begin(), col.end(), checked_delete<some_type> );
> 
> That works with gcc, and the version below works with Comeau C++ as 
well.
> There's no need for a function object.
> 
> Jens Maurer
> 
> 
> #include <vector>
> #include <algorithm>
> #include <boost/utility.hpp>
> 
> int main()
> {
>   std::vector<int*> col;
>   void (*f)(int *) = &boost::checked_delete<int>;
>   std::for_each( col.begin(), col.end(), f);
> }

Try original version. 

#include <vector>
#include <algorithm>
#include <boost/utility.hpp>

int main()
{
  std::vector<int*> col;
  std::for_each( col.begin(), col.end(), 
&boost::checked_delete<int> );
}

I do not rememeber what written in Standard about address of inline 
function and instantiation in this case, but MSVC produce following 
link error:

test_area.obj : error LNK2001: unresolved external symbol "void 
__cdecl boost::checked_delete(int *)" (?
checked_delete_at_boost@@YAXPAH_at_Z)
Debug/test_area.exe : fatal error LNK1120: 1 unresolved externals

Gennadiy.