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/* Copyright 2003-2008 Joaquin M Lopez Munoz.
* Distributed under the Boost Software License, Version 1.0.
* (See accompanying file LICENSE_1_0.txt or copy at
* http://www.boost.org/LICENSE_1_0.txt)
*
* See http://www.boost.org/libs/multi_index for library home page.
*/
#ifndef BOOST_MULTI_INDEX_DETAIL_MODIFY_KEY_ADAPTOR_HPP
#define BOOST_MULTI_INDEX_DETAIL_MODIFY_KEY_ADAPTOR_HPP
#if defined(_MSC_VER)&&(_MSC_VER>=1200)
#pragma once
#endif
namespace boost{
namespace multi_index{
namespace detail{
/* Functional adaptor to resolve modify_key as a call to modify.
* Preferred over compose_f_gx and stuff cause it eliminates problems
* with references to references, dealing with function pointers, etc.
*/
template<typename Fun,typename Value,typename KeyFromValue>
struct modify_key_adaptor
{
modify_key_adaptor(Fun f_,KeyFromValue kfv_):f(f_),kfv(kfv_){}
void operator()(Value& x)
{
f(kfv(x));
}
private:
Fun f;
KeyFromValue kfv;
};
} /* namespace multi_index::detail */
} /* namespace multi_index */
} /* namespace boost */
#endif
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