50 lines
1.1 KiB
Plaintext
50 lines
1.1 KiB
Plaintext
/* Copyright 2003-2013 Joaquin M Lopez Munoz.
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* Distributed under the Boost Software License, Version 1.0.
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* (See accompanying file LICENSE_1_0.txt or copy at
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* http://www.boost.org/LICENSE_1_0.txt)
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*
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* See http://www.boost.org/libs/multi_index for library home page.
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*/
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#ifndef BOOST_MULTI_INDEX_DETAIL_MODIFY_KEY_ADAPTOR_HPP
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#define BOOST_MULTI_INDEX_DETAIL_MODIFY_KEY_ADAPTOR_HPP
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#if defined(_MSC_VER)
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#pragma once
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#endif
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namespace boost{
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namespace multi_index{
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namespace detail{
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/* Functional adaptor to resolve modify_key as a call to modify.
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* Preferred over compose_f_gx and stuff cause it eliminates problems
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* with references to references, dealing with function pointers, etc.
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*/
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template<typename Fun,typename Value,typename KeyFromValue>
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struct modify_key_adaptor
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{
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modify_key_adaptor(Fun f_,KeyFromValue kfv_):f(f_),kfv(kfv_){}
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void operator()(Value& x)
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{
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f(kfv(x));
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}
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private:
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Fun f;
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KeyFromValue kfv;
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};
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} /* namespace multi_index::detail */
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} /* namespace multi_index */
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} /* namespace boost */
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#endif
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