Re: for_each loop on a map without a functor

From:

"Daniel T." <daniel_t@earthlink.net>

Newsgroups:

microsoft.public.vc.stl, comp.lang.c++

Date:

Fri, 18 Jan 2008 13:13:14 -0800 (PST)

Message-ID:

<fe9f4fdb-46f8-4531-a2dc-20e64882c6e2@f10g2000hsf.googlegroups.com>

On Jan 18, 3:41 pm, nguillot <nicolas.guil...@gmail.com> wrote:

On 18 jan, 21:03, "Daniel T." <danie...@earthlink.net> wrote:

On Jan 18, 5:45 am, nguillot <nicolas.guil...@gmail.com> wrote:

So the question: how write the for_each line?

Hmm, the for_each line I wrote above compiles fine for me. What
compiler are you using?

I tried on VC++ 6.0 and on visual studio 2005...
and you

Visual Sutdio 2005 compiles the following just fine:
=== begine code ===
#include <algorithm>
#include <map>

using namespace std;

typedef int k;

class d {
public:
   void setIntMember( int i ) { }
};

template < typename Pair, typename Op >
class CallFuncOn2nd_t {
   Op fn;
public:
   CallFuncOn2nd_t( Op fn ): fn(fn) { }
   typename Op::result_type operator()( Pair& v ) const {
      return fn( v.second );
   }
};

template < typename Pair, typename Op >
CallFuncOn2nd_t<Pair, Op> callFuncOn2nd( Op fn ) {
   return CallFuncOn2nd_t<Pair, Op>( fn );
}

typedef std::map<k, d> tMap;

int main(){
   tMap m;
   for_each(m.begin(), m.end(),

callFuncOn2nd<tMap::value_type>( bind2nd( mem_fun_ref( &d::setIntMember ),
4 ) ) );
}
=== end code ===