[Boost-users] Boost.multi_index: how to use a member function instead ofoperator<()?

Subject: [Boost-users] Boost.multi_index: how to use a member function instead ofoperator<()?
From: Joost Kraaijeveld (J.Kraaijeveld_at_[hidden])
Date: 2009-02-23 14:03:30

Hi,

I want to use in index based on a member function that returns a bool if
an element is smaller than an other element like operator<. But I cannot
find how to do that.

e.g.

using namespace ::boost;
using namespace ::boost::multi_index;

class Object{
  bool operator<(const Object& rhs) const;
  bool fn(const Object& rhs) const;
}

struct FnIndex{};

typedef multi_index_container<
Object,
indexed_by	<
ordered_unique< identity< Square > >, // this uses operator<(const Object&) I believe?
ordered_unique< tag< FnIndex >, ?????????????? >
>
> ObjectContainer;

If this possible, what should I use in the place of ?????????

TIA
 
-- 
Groeten,
Joost Kraaijeveld
Askesis B.V.
Molukkenstraat 14
6524NB Nijmegen
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