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Diffstat (limited to 'src/third_party/boost-1.69.0/boost/multi_index/detail/hash_index_args.hpp')
-rw-r--r-- | src/third_party/boost-1.69.0/boost/multi_index/detail/hash_index_args.hpp | 105 |
1 files changed, 105 insertions, 0 deletions
diff --git a/src/third_party/boost-1.69.0/boost/multi_index/detail/hash_index_args.hpp b/src/third_party/boost-1.69.0/boost/multi_index/detail/hash_index_args.hpp new file mode 100644 index 00000000000..81902f5a4a5 --- /dev/null +++ b/src/third_party/boost-1.69.0/boost/multi_index/detail/hash_index_args.hpp @@ -0,0 +1,105 @@ +/* Copyright 2003-2013 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_HASH_INDEX_ARGS_HPP +#define BOOST_MULTI_INDEX_DETAIL_HASH_INDEX_ARGS_HPP + +#if defined(_MSC_VER) +#pragma once +#endif + +#include <boost/config.hpp> /* keep it first to prevent nasty warns in MSVC */ +#include <boost/functional/hash.hpp> +#include <boost/mpl/aux_/na.hpp> +#include <boost/mpl/eval_if.hpp> +#include <boost/mpl/identity.hpp> +#include <boost/mpl/if.hpp> +#include <boost/multi_index/tag.hpp> +#include <boost/static_assert.hpp> +#include <boost/type_traits/is_same.hpp> +#include <functional> + +namespace boost{ + +namespace multi_index{ + +namespace detail{ + +/* Hashed index specifiers can be instantiated in two forms: + * + * (hashed_unique|hashed_non_unique)< + * KeyFromValue, + * Hash=boost::hash<KeyFromValue::result_type>, + * Pred=std::equal_to<KeyFromValue::result_type> > + * (hashed_unique|hashed_non_unique)< + * TagList, + * KeyFromValue, + * Hash=boost::hash<KeyFromValue::result_type>, + * Pred=std::equal_to<KeyFromValue::result_type> > + * + * hashed_index_args implements the machinery to accept this + * argument-dependent polymorphism. + */ + +template<typename KeyFromValue> +struct index_args_default_hash +{ + typedef ::boost::hash<typename KeyFromValue::result_type> type; +}; + +template<typename KeyFromValue> +struct index_args_default_pred +{ + typedef std::equal_to<typename KeyFromValue::result_type> type; +}; + +template<typename Arg1,typename Arg2,typename Arg3,typename Arg4> +struct hashed_index_args +{ + typedef is_tag<Arg1> full_form; + + typedef typename mpl::if_< + full_form, + Arg1, + tag< > >::type tag_list_type; + typedef typename mpl::if_< + full_form, + Arg2, + Arg1>::type key_from_value_type; + typedef typename mpl::if_< + full_form, + Arg3, + Arg2>::type supplied_hash_type; + typedef typename mpl::eval_if< + mpl::is_na<supplied_hash_type>, + index_args_default_hash<key_from_value_type>, + mpl::identity<supplied_hash_type> + >::type hash_type; + typedef typename mpl::if_< + full_form, + Arg4, + Arg3>::type supplied_pred_type; + typedef typename mpl::eval_if< + mpl::is_na<supplied_pred_type>, + index_args_default_pred<key_from_value_type>, + mpl::identity<supplied_pred_type> + >::type pred_type; + + BOOST_STATIC_ASSERT(is_tag<tag_list_type>::value); + BOOST_STATIC_ASSERT(!mpl::is_na<key_from_value_type>::value); + BOOST_STATIC_ASSERT(!mpl::is_na<hash_type>::value); + BOOST_STATIC_ASSERT(!mpl::is_na<pred_type>::value); +}; + +} /* namespace multi_index::detail */ + +} /* namespace multi_index */ + +} /* namespace boost */ + +#endif |