50 lines
1.1 KiB
C++
50 lines
1.1 KiB
C++
/* 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
|