problem compiling boost.function w/ g++ 2.95.3

From: Darin Buck (darinbuck_at_[hidden])
Date: 2001-11-28 21:25:39

when trying to compile the following code (cut from the 
boost.function test suite):

#include <boost/bind.hpp>
#include <boost/function.hpp>
#include <iostream>
#include <string>
#include <functional>
struct X
{     
    X(int v) : value(v) {}

    int twice() const { return 2*value; }
    int plus(int v) { return value + v; }

    int value;                         
};                                   

int main()
{
    using namespace boost;

    boost::function<int, X*> f1(&X::twice);
    X one(1);
    cout << "f1(one) = " << f1(&one) << endl;
    return 0;
}     

_____________________________________________

i get the following errors:

/usr/local/include/boost/function/function_template.hpp: In function 
`static int boost::detail::function::function_obj_invoker1<int (X::*)
() const,int,X *>::invoke(boost::detail::function::any_pointer, X *)':
/usr/local/include/boost/function/function_template.hpp:689:   
instantiated from `boost::function1<int,X 
*,boost::empty_function_policy,boost::empty_function_mixin,allocator<b
oost::function_base> >::assign_to<int (X::*)() const>(int (X::* &)() 
const, boost::detail::function::function_obj_tag)'
/usr/local/include/boost/function/function_template.hpp:618:   
instantiated from `boost::function1<int,X 
*,boost::empty_function_policy,boost::empty_function_mixin,allocator<b
oost::function_base> >::assign_to<int (X::*)() const>(int (X::* &)() 
const)'
/usr/local/include/boost/function/function_template.hpp:463:   
instantiated from `boost::function1<int,X 
*,boost::empty_function_policy,boost::empty_function_mixin,allocator<b
oost::function_base> >::function1<int (X::*)() const>(int (X::* &)() 
const)'
/usr/local/include/boost/function.hpp:459:   instantiated from 
`boost::function<int,X 
*,boost::detail::function::unusable,boost::detail::function::unusable,
boost::detail::function::unusable,boost::detail::function::unusable,bo
ost::detail::function::unusable,boost::detail::function::unusable,boos
t::detail::function::unusable,boost::detail::function::unusable,boost:
:detail::function::unusable>::function<int (X::*)() const>(int (X::* 
&)() const)'
hello.C:21:   instantiated from here
/usr/local/include/boost/function/function_template.hpp:272: pointer 
to member function called, but not in class scope
/usr/local/include/boost/function/function_template.hpp:272: warning: 
control reaches end of non-void function 
`boost::detail::function::function_obj_invoker1<int (X::*)() 
const,int,X *>::invoke(boost::detail::function::any_pointer, X *)'
/usr/local/include/g++-3/stl_alloc.h: At top level:
/usr/local/include/g++-3/stl_alloc.h: In instantiation of 
`allocator<int (X::*)() const>':
/usr/local/include/boost/function/function_base.hpp:131:   
instantiated from `boost::detail::function::functor_manager<int (X::*)
() const,allocator<boost::function_base> >'
/usr/local/include/boost/function/function_template.hpp:691:   
instantiated from `boost::function1<int,X 
*,boost::empty_function_policy,boost::empty_function_mixin,allocator<b
oost::function_base> >::assign_to<int (X::*)() const>(int (X::* &)() 
const, boost::detail::function::function_obj_tag)'
/usr/local/include/boost/function/function_template.hpp:618:   
instantiated from `boost::function1<int,X 
*,boost::empty_function_policy,boost::empty_function_mixin,allocator<b
oost::function_base> >::assign_to<int (X::*)() const>(int (X::* &)() 
const)'
/usr/local/include/boost/function/function_template.hpp:463:   
instantiated from `boost::function1<int,X 
*,boost::empty_function_policy,boost::empty_function_mixin,allocator<b
oost::function_base> >::function1<int (X::*)() const>(int (X::* &)() 
const)'
/usr/local/include/boost/function.hpp:459:   instantiated from 
`boost::function<int,X 
*,boost::detail::function::unusable,boost::detail::function::unusable,
boost::detail::function::unusable,boost::detail::function::unusable,bo
ost::detail::function::unusable,boost::detail::function::unusable,boos
t::detail::function::unusable,boost::detail::function::unusable,boost:
:detail::function::unusable>::function<int (X::*)() const>(int (X::* 
&)() const)'
hello.C:21:   instantiated from here
/usr/local/include/g++-3/stl_alloc.h:750: `allocator<int (X::*)() 
const>::address(int (X::* &)() const) const' has already been 
declared in `allocator<int (X::*)() const>'
make: *** [hello.o] Error 1

___________________________________

this code should compile (its just copied from the test code) and my 
compiler setup should work according to the boost compiler status 
page.

Any ideas what i'm doing wrong?

-Darin Buck