c++ - Using Boost.Phoenix's operator ->* -

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i'm playing around phoenix v3 trying figure out whether should standardize on instead of current mix of bind , lambda. documentation got impression should possible simplify expressions.

currently i'm stuck on usage of ->* operator in combination stl algos. following compile (visual studio 2008 sp1) not give expected output:

#include <algorithm> #include <iostream> #include <vector> #include <boost/mem_fn.hpp> #include <boost/phoenix.hpp> using namespace std; using namespace boost; using namespace boost::phoenix; using namespace boost::phoenix::arg_names;  struct {   void f() const { cout << "a"; }; }; struct b {   a() { return a(); }; };  int main() {   vector<a> va(1);   for_each(va.begin(), va.end(), bind(mem_fn(&a::f), arg1));   for_each(va.begin(), va.end(), arg1->*&a::f);    vector<b> vb(1);   for_each(vb.begin(), vb.end(), bind(mem_fn(&a::f), bind(mem_fn(&b::a), arg1)));   return 0; }

running example print out 'a' twice, both times bind-based loops. here questions:

  • what should change in order have operator-based loop call a::f?
  • how change double-bind loop using operators?
  • anyone know why vs2008 complaining when don't specify mem_fn in these cases? warning c4180 (qualifier applied function type has no meaning; ignored).

thanks in advance insights.

i not @ phoenix think cannot use ->* operator way want use.
if change example 

...     vector<a*> va;     va.push_back(new a);     for_each(va.begin(), va.end(), bind(mem_fn(&a::f), arg1));     for_each(va.begin(), va.end(), (arg1->*&a::f)()); ...

you 2 times a. in examples found examples pointers guess can use phoenix ->* operator pointers. should ok operator ->* binds pointers.
spec in 5.5:

the binary operator ->* binds second operand, shall of type “pointer member of t” (where t completely-defined class type) first operand, shall of type “pointer t” or “pointer class of t unambiguous , accessible base class


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