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Diffstat (limited to '3rdParty/Boost/src/boost/unordered/detail/extract_key.hpp')
-rw-r--r--3rdParty/Boost/src/boost/unordered/detail/extract_key.hpp148
1 files changed, 148 insertions, 0 deletions
diff --git a/3rdParty/Boost/src/boost/unordered/detail/extract_key.hpp b/3rdParty/Boost/src/boost/unordered/detail/extract_key.hpp
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+++ b/3rdParty/Boost/src/boost/unordered/detail/extract_key.hpp
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+
+// Copyright (C) 2005-2009 Daniel James
+// 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)
+
+#ifndef BOOST_UNORDERED_DETAIL_EXTRACT_KEY_HPP_INCLUDED
+#define BOOST_UNORDERED_DETAIL_EXTRACT_KEY_HPP_INCLUDED
+
+#include <boost/config.hpp>
+#include <boost/type_traits/remove_const.hpp>
+#include <boost/unordered/detail/fwd.hpp>
+
+namespace boost {
+namespace unordered_detail {
+
+ // key extractors
+ //
+ // no throw
+ //
+ // 'extract_key' is called with the emplace parameters to return a
+ // key if available or 'no_key' is one isn't and will need to be
+ // constructed. This could be done by overloading the emplace implementation
+ // for the different cases, but that's a bit tricky on compilers without
+ // variadic templates.
+
+ struct no_key {
+ no_key() {}
+ template <class T> no_key(T const&) {}
+ };
+
+ template <class ValueType>
+ struct set_extractor
+ {
+ typedef ValueType value_type;
+ typedef ValueType key_type;
+
+ static key_type const& extract(key_type const& v)
+ {
+ return v;
+ }
+
+ static no_key extract()
+ {
+ return no_key();
+ }
+
+#if defined(BOOST_UNORDERED_STD_FORWARD)
+ template <class... Args>
+ static no_key extract(Args const&...)
+ {
+ return no_key();
+ }
+
+#else
+ template <class Arg>
+ static no_key extract(Arg const&)
+ {
+ return no_key();
+ }
+
+ template <class Arg>
+ static no_key extract(Arg const&, Arg const&)
+ {
+ return no_key();
+ }
+#endif
+
+ static bool compare_mapped(value_type const&, value_type const&)
+ {
+ return true;
+ }
+ };
+
+ template <class Key, class ValueType>
+ struct map_extractor
+ {
+ typedef ValueType value_type;
+ typedef BOOST_DEDUCED_TYPENAME boost::remove_const<Key>::type key_type;
+
+ static key_type const& extract(value_type const& v)
+ {
+ return v.first;
+ }
+
+ static key_type const& extract(key_type const& v)
+ {
+ return v;
+ }
+
+ template <class Second>
+ static key_type const& extract(std::pair<key_type, Second> const& v)
+ {
+ return v.first;
+ }
+
+ template <class Second>
+ static key_type const& extract(
+ std::pair<key_type const, Second> const& v)
+ {
+ return v.first;
+ }
+
+#if defined(BOOST_UNORDERED_STD_FORWARD)
+ template <class Arg1, class... Args>
+ static key_type const& extract(key_type const& k,
+ Arg1 const&, Args const&...)
+ {
+ return k;
+ }
+
+ template <class... Args>
+ static no_key extract(Args const&...)
+ {
+ return no_key();
+ }
+#else
+ template <class Arg1>
+ static key_type const& extract(key_type const& k, Arg1 const&)
+ {
+ return k;
+ }
+
+ static no_key extract()
+ {
+ return no_key();
+ }
+
+ template <class Arg>
+ static no_key extract(Arg const&)
+ {
+ return no_key();
+ }
+
+ template <class Arg, class Arg1>
+ static no_key extract(Arg const&, Arg1 const&)
+ {
+ return no_key();
+ }
+#endif
+
+ static bool compare_mapped(value_type const& x, value_type const& y)
+ {
+ return x.second == y.second;
+ }
+ };
+}}
+
+#endif