563 lines
19 KiB
C++
Executable File
563 lines
19 KiB
C++
Executable File
/////////////////////////////////////////////////////////////////////////////
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//
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// (C) Copyright Ion Gaztanaga 2013-2013
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//
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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/container for documentation.
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//
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/////////////////////////////////////////////////////////////////////////////
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#ifndef BOOST_CONTAINER_OPTIONS_HPP
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#define BOOST_CONTAINER_OPTIONS_HPP
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#ifndef BOOST_CONFIG_HPP
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# include <boost/config.hpp>
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#endif
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#if defined(BOOST_HAS_PRAGMA_ONCE)
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# pragma once
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#endif
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#include <boost/container/detail/config_begin.hpp>
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#include <boost/container/container_fwd.hpp>
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#include <boost/intrusive/pack_options.hpp>
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#include <boost/static_assert.hpp>
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namespace boost {
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namespace container {
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////////////////////////////////////////////////////////////////
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//
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//
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// OPTIONS FOR ASSOCIATIVE TREE-BASED CONTAINERS
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//
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//
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////////////////////////////////////////////////////////////////
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//! Enumeration used to configure ordered associative containers
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//! with a concrete tree implementation.
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enum tree_type_enum
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{
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red_black_tree,
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avl_tree,
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scapegoat_tree,
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splay_tree
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};
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#if !defined(BOOST_CONTAINER_DOXYGEN_INVOKED)
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template<tree_type_enum TreeType, bool OptimizeSize>
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struct tree_opt
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{
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static const boost::container::tree_type_enum tree_type = TreeType;
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static const bool optimize_size = OptimizeSize;
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};
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typedef tree_opt<red_black_tree, true> tree_assoc_defaults;
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#endif //!defined(BOOST_CONTAINER_DOXYGEN_INVOKED)
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//!This option setter specifies the underlying tree type
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//!(red-black, AVL, Scapegoat or Splay) for ordered associative containers
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BOOST_INTRUSIVE_OPTION_CONSTANT(tree_type, tree_type_enum, TreeType, tree_type)
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//!This option setter specifies if node size is optimized
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//!storing rebalancing data masked into pointers for ordered associative containers
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BOOST_INTRUSIVE_OPTION_CONSTANT(optimize_size, bool, Enabled, optimize_size)
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//! Helper metafunction to combine options into a single type to be used
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//! by \c boost::container::set, \c boost::container::multiset
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//! \c boost::container::map and \c boost::container::multimap.
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//! Supported options are: \c boost::container::optimize_size and \c boost::container::tree_type
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#if defined(BOOST_CONTAINER_DOXYGEN_INVOKED) || defined(BOOST_CONTAINER_VARIADIC_TEMPLATES)
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template<class ...Options>
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#else
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template<class O1 = void, class O2 = void, class O3 = void, class O4 = void>
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#endif
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struct tree_assoc_options
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{
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/// @cond
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typedef typename ::boost::intrusive::pack_options
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< tree_assoc_defaults,
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#if !defined(BOOST_CONTAINER_VARIADIC_TEMPLATES)
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O1, O2, O3, O4
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#else
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Options...
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#endif
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>::type packed_options;
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typedef tree_opt<packed_options::tree_type, packed_options::optimize_size> implementation_defined;
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/// @endcond
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typedef implementation_defined type;
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};
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#if !defined(BOOST_NO_CXX11_TEMPLATE_ALIASES)
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//! Helper alias metafunction to combine options into a single type to be used
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//! by tree-based associative containers
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template<class ...Options>
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using tree_assoc_options_t = typename boost::container::tree_assoc_options<Options...>::type;
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#endif
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////////////////////////////////////////////////////////////////
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//
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//
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// OPTIONS FOR ASSOCIATIVE HASH-BASED CONTAINERS
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//
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//
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////////////////////////////////////////////////////////////////
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#if !defined(BOOST_CONTAINER_DOXYGEN_INVOKED)
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template<bool StoreHash>
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struct hash_opt
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{
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static const bool store_hash = StoreHash;
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};
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typedef hash_opt<false> hash_assoc_defaults;
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#endif //!defined(BOOST_CONTAINER_DOXYGEN_INVOKED)
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//!This option setter specifies if node size is optimized
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//!storing rebalancing data masked into pointers for ordered associative containers
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BOOST_INTRUSIVE_OPTION_CONSTANT(store_hash, bool, Enabled, store_hash)
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//! Helper metafunction to combine options into a single type to be used
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//! by \c boost::container::hash_set, \c boost::container::hash_multiset
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//! \c boost::container::hash_map and \c boost::container::hash_multimap.
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//! Supported options are: \c boost::container::store_hash
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#if defined(BOOST_CONTAINER_DOXYGEN_INVOKED) || defined(BOOST_CONTAINER_VARIADIC_TEMPLATES)
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template<class ...Options>
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#else
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template<class O1 = void, class O2 = void, class O3 = void, class O4 = void>
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#endif
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struct hash_assoc_options
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{
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/// @cond
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typedef typename ::boost::intrusive::pack_options
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< hash_assoc_defaults,
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#if !defined(BOOST_CONTAINER_VARIADIC_TEMPLATES)
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O1, O2, O3, O4
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#else
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Options...
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#endif
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>::type packed_options;
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typedef hash_opt<packed_options::store_hash> implementation_defined;
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/// @endcond
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typedef implementation_defined type;
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};
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#if !defined(BOOST_NO_CXX11_TEMPLATE_ALIASES)
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//! Helper alias metafunction to combine options into a single type to be used
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//! by hash-based associative containers
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template<class ...Options>
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using hash_assoc_options_t = typename boost::container::hash_assoc_options<Options...>::type;
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#endif
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////////////////////////////////////////////////////////////////
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//
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//
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// OPTIONS FOR VECTOR-BASED CONTAINERS
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//
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//
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////////////////////////////////////////////////////////////////
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#if !defined(BOOST_CONTAINER_DOXYGEN_INVOKED)
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template<class T, class Default>
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struct default_if_void
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{
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typedef T type;
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};
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template<class Default>
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struct default_if_void<void, Default>
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{
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typedef Default type;
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};
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#endif
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#if !defined(BOOST_CONTAINER_DOXYGEN_INVOKED)
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template<class AllocTraits, class StoredSizeType>
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struct get_stored_size_type_with_alloctraits
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{
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typedef StoredSizeType type;
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};
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template<class AllocTraits>
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struct get_stored_size_type_with_alloctraits<AllocTraits, void>
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{
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typedef typename AllocTraits::size_type type;
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};
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template<class GrowthType, class StoredSizeType>
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struct vector_opt
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{
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typedef GrowthType growth_factor_type;
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typedef StoredSizeType stored_size_type;
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template<class AllocTraits>
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struct get_stored_size_type
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: get_stored_size_type_with_alloctraits<AllocTraits, StoredSizeType>
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{};
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};
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class default_next_capacity;
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typedef vector_opt<void, void> vector_null_opt;
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template<class GrowthType, class StoredSizeType>
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struct devector_opt
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: vector_opt<GrowthType, StoredSizeType>
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{};
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typedef devector_opt<void, void> devector_null_opt;
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#else //!defined(BOOST_CONTAINER_DOXYGEN_INVOKED)
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//!This growth factor argument specifies that the container should increase it's
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//!capacity a 50% when existing capacity is exhausted.
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struct growth_factor_50{};
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//!This growth factor argument specifies that the container should increase it's
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//!capacity a 60% when existing capacity is exhausted.
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struct growth_factor_60{};
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//!This growth factor argument specifies that the container should increase it's
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//!capacity a 100% (doubling its capacity) when existing capacity is exhausted.
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struct growth_factor_100{};
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#endif //!defined(BOOST_CONTAINER_DOXYGEN_INVOKED)
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//!This option setter specifies the growth factor strategy of the underlying vector.
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//!
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//!\tparam GrowthFactor A function object that has the following signature:<br/><br/>
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//!`template<class SizeType>`<br/>
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//!`SizeType operator()(SizeType cur_cap, SizeType add_min_cap, SizeType max_cap) const;`.<br/><br/>
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//!`cur_cap` is the current capacity, `add_min_cap` is the minimum additional capacity
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//!we want to achieve and `max_cap` is the maximum capacity that the allocator or other
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//!factors allow. The implementation should return a value between `cur_cap` + `add_min_cap`
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//!and `max_cap`. `cur_cap` + `add_min_cap` is guaranteed not to overflow/wraparound,
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//! but the implementation should handle wraparound produced by the growth factor.
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//!
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//!Predefined growth factors that can be passed as arguments to this option are:
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//!\c boost::container::growth_factor_50
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//!\c boost::container::growth_factor_60
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//!\c boost::container::growth_factor_100
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//!
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//!If this option is not specified, a default will be used by the container.
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BOOST_INTRUSIVE_OPTION_TYPE(growth_factor, GrowthFactor, GrowthFactor, growth_factor_type)
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//!This option specifies the unsigned integer type that a user wants the container
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//!to use to hold size-related information inside a container (e.g. current size, current capacity).
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//!
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//!\tparam StoredSizeType An unsigned integer type. It shall be smaller than than the size
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//! of the size_type deduced from `allocator_traits<A>::size_type` or the same type.
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//!
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//!If the maximum capacity() to be used is limited, a user can try to use 8-bit, 16-bit
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//!(e.g. in 32-bit machines), or 32-bit size types (e.g. in a 64 bit machine) to see if some
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//!memory can be saved for empty vectors. This could potentially performance benefits due to better
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//!cache usage.
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//!
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//!Note that alignment requirements can disallow theoretical space savings. Example:
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//!\c vector holds a pointer and two size types (for size and capacity), in a 32 bit machine
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//!a 8 bit size type (total size: 4 byte pointer + 2 x 1 byte sizes = 6 bytes)
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//!will not save space when comparing two 16-bit size types because usually
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//!a 32 bit alignment is required for vector and the size will be rounded to 8 bytes. In a 64-bit
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//!machine a 16 bit size type does not usually save memory when comparing to a 32-bit size type.
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//!Measure the size of the resulting container and do not assume a smaller \c stored_size
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//!will always lead to a smaller sizeof(container).
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//!
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//!If a user tries to insert more elements than representable by \c stored_size, vector
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//!will throw a length_error.
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//!
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//!If this option is not specified, `allocator_traits<A>::size_type` (usually std::size_t) will
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//!be used to store size-related information inside the container.
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BOOST_INTRUSIVE_OPTION_TYPE(stored_size, StoredSizeType, StoredSizeType, stored_size_type)
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//! Helper metafunction to combine options into a single type to be used
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//! by \c boost::container::vector.
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//! Supported options are: \c boost::container::growth_factor and \c boost::container::stored_size
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#if defined(BOOST_CONTAINER_DOXYGEN_INVOKED) || defined(BOOST_CONTAINER_VARIADIC_TEMPLATES)
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template<class ...Options>
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#else
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template<class O1 = void, class O2 = void, class O3 = void, class O4 = void>
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#endif
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struct vector_options
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{
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/// @cond
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typedef typename ::boost::intrusive::pack_options
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< vector_null_opt,
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#if !defined(BOOST_CONTAINER_VARIADIC_TEMPLATES)
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O1, O2, O3, O4
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#else
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Options...
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#endif
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>::type packed_options;
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typedef vector_opt< typename packed_options::growth_factor_type
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, typename packed_options::stored_size_type> implementation_defined;
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/// @endcond
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typedef implementation_defined type;
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};
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#if !defined(BOOST_NO_CXX11_TEMPLATE_ALIASES)
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//! Helper alias metafunction to combine options into a single type to be used
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//! by \c boost::container::vector.
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//! Supported options are: \c boost::container::growth_factor and \c boost::container::stored_size
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template<class ...Options>
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using vector_options_t = typename boost::container::vector_options<Options...>::type;
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#endif
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////////////////////////////////////////////////////////////////
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//
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//
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// OPTIONS FOR SMALL-VECTOR CONTAINER
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//
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//
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////////////////////////////////////////////////////////////////
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//! This option specifies the desired alignment for the value_type stored
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//! in the container.
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//! A value zero represents the natural alignment.
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//!
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//!\tparam Alignment An unsigned integer value. Must be power of two.
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BOOST_INTRUSIVE_OPTION_CONSTANT(inplace_alignment, std::size_t, Alignment, inplace_alignment)
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#if !defined(BOOST_CONTAINER_DOXYGEN_INVOKED)
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template<class GrowthType, std::size_t InplaceAlignment>
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struct small_vector_opt
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{
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typedef GrowthType growth_factor_type;
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static const std::size_t inplace_alignment = InplaceAlignment;
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};
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typedef small_vector_opt<void, 0u> small_vector_null_opt;
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#endif //!defined(BOOST_CONTAINER_DOXYGEN_INVOKED)
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//! Helper metafunction to combine options into a single type to be used
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//! by \c boost::container::small_vector.
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//! Supported options are: \c boost::container::growth_factor and \c boost::container::inplace_alignment
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#if defined(BOOST_CONTAINER_DOXYGEN_INVOKED) || defined(BOOST_CONTAINER_VARIADIC_TEMPLATES)
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template<class ...Options>
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#else
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template<class O1 = void, class O2 = void, class O3 = void, class O4 = void>
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#endif
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struct small_vector_options
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{
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/// @cond
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typedef typename ::boost::intrusive::pack_options
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< small_vector_null_opt,
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#if !defined(BOOST_CONTAINER_VARIADIC_TEMPLATES)
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O1, O2, O3, O4
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#else
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Options...
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#endif
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>::type packed_options;
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typedef small_vector_opt< typename packed_options::growth_factor_type
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, packed_options::inplace_alignment> implementation_defined;
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/// @endcond
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typedef implementation_defined type;
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};
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#if !defined(BOOST_NO_CXX11_TEMPLATE_ALIASES)
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//! Helper alias metafunction to combine options into a single type to be used
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//! by \c boost::container::small_vector.
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//! Supported options are: \c boost::container::growth_factor and \c boost::container::stored_size
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template<class ...Options>
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using small_vector_options_t = typename boost::container::small_vector_options<Options...>::type;
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#endif
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////////////////////////////////////////////////////////////////
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//
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//
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// OPTIONS FOR STATIC-VECTOR CONTAINER
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//
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//
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////////////////////////////////////////////////////////////////
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//!This option specifies if the container will throw if in
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//!the static capacity is not sufficient to hold the required
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//!values. If false is specified, insufficient capacity will
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//!lead to BOOST_ASSERT, and if this assertion returns, to undefined behaviour,
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//!which potentially can lead to better static_vector performance.
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//!The default value is true.
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//!
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//!\tparam ThrowOnExhaustion A boolean value. True if throw is required.
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BOOST_INTRUSIVE_OPTION_CONSTANT(throw_on_overflow, bool, ThrowOnOverflow, throw_on_overflow)
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#if !defined(BOOST_CONTAINER_DOXYGEN_INVOKED)
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template<bool ThrowOnOverflow, std::size_t InplaceAlignment>
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struct static_vector_opt
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{
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static const bool throw_on_overflow = ThrowOnOverflow;
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static const std::size_t inplace_alignment = InplaceAlignment;
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};
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typedef static_vector_opt<true, 0u> static_vector_null_opt;
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#endif //!defined(BOOST_CONTAINER_DOXYGEN_INVOKED)
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//! Helper metafunction to combine options into a single type to be used
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//! by \c boost::container::static_vector.
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//! Supported options are: \c boost::container::throw_on_overflow and \c boost::container::inplace_alignment
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#if defined(BOOST_CONTAINER_DOXYGEN_INVOKED) || defined(BOOST_CONTAINER_VARIADIC_TEMPLATES)
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template<class ...Options>
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#else
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template<class O1 = void, class O2 = void, class O3 = void, class O4 = void>
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#endif
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struct static_vector_options
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{
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/// @cond
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typedef typename ::boost::intrusive::pack_options
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< static_vector_null_opt,
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#if !defined(BOOST_CONTAINER_VARIADIC_TEMPLATES)
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O1, O2, O3, O4
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#else
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Options...
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#endif
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>::type packed_options;
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typedef static_vector_opt< packed_options::throw_on_overflow
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, packed_options::inplace_alignment> implementation_defined;
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/// @endcond
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typedef implementation_defined type;
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};
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#if !defined(BOOST_NO_CXX11_TEMPLATE_ALIASES)
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//! Helper alias metafunction to combine options into a single type to be used
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//! by \c boost::container::static_vector.
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//! Supported options are: \c boost::container::growth_factor and \c boost::container::stored_size
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template<class ...Options>
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using static_vector_options_t = typename boost::container::static_vector_options<Options...>::type;
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#endif
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//! Helper metafunction to combine options into a single type to be used
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//! by \c boost::container::devector.
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//! Supported options are: \c boost::container::growth_factor and \c boost::container::stored_size
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#if defined(BOOST_CONTAINER_DOXYGEN_INVOKED) || defined(BOOST_CONTAINER_VARIADIC_TEMPLATES)
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template<class ...Options>
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#else
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template<class O1 = void, class O2 = void, class O3 = void, class O4 = void>
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#endif
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struct devector_options
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{
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/// @cond
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typedef typename ::boost::intrusive::pack_options
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< devector_null_opt,
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#if !defined(BOOST_CONTAINER_VARIADIC_TEMPLATES)
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O1, O2, O3, O4
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#else
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Options...
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#endif
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>::type packed_options;
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typedef devector_opt< typename packed_options::growth_factor_type
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, typename packed_options::stored_size_type> implementation_defined;
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/// @endcond
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typedef implementation_defined type;
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};
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#if !defined(BOOST_NO_CXX11_TEMPLATE_ALIASES)
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//! Helper alias metafunction to combine options into a single type to be used
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//! by \c boost::container::devector.
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//! Supported options are: \c boost::container::growth_factor and \c boost::container::stored_size
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template<class ...Options>
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using devector_options_t = typename boost::container::devector_options<Options...>::type;
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#endif
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////////////////////////////////////////////////////////////////
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//
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//
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// OPTIONS FOR DEQUE-BASED CONTAINERS
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//
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//
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////////////////////////////////////////////////////////////////
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#if !defined(BOOST_CONTAINER_DOXYGEN_INVOKED)
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template<std::size_t BlockBytes, std::size_t BlockSize>
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struct deque_opt
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{
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static const std::size_t block_bytes = BlockBytes;
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static const std::size_t block_size = BlockSize;
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BOOST_STATIC_ASSERT_MSG(!(block_bytes && block_size), "block_bytes and block_size can't be specified at the same time");
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};
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typedef deque_opt<0u, 0u> deque_null_opt;
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#endif
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//! Helper metafunction to combine options into a single type to be used
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//! by \c boost::container::deque.
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//! Supported options are: \c boost::container::block_bytes
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#if defined(BOOST_CONTAINER_DOXYGEN_INVOKED) || defined(BOOST_CONTAINER_VARIADIC_TEMPLATES)
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template<class ...Options>
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#else
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template<class O1 = void, class O2 = void, class O3 = void, class O4 = void>
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#endif
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struct deque_options
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{
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/// @cond
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typedef typename ::boost::intrusive::pack_options
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< deque_null_opt,
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#if !defined(BOOST_CONTAINER_VARIADIC_TEMPLATES)
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O1, O2, O3, O4
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#else
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Options...
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#endif
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>::type packed_options;
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typedef deque_opt< packed_options::block_bytes, packed_options::block_size > implementation_defined;
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/// @endcond
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typedef implementation_defined type;
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};
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#if !defined(BOOST_NO_CXX11_TEMPLATE_ALIASES)
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//! Helper alias metafunction to combine options into a single type to be used
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//! by \c boost::container::deque.
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//! Supported options are: \c boost::container::block_bytes
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template<class ...Options>
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using deque_options_t = typename boost::container::deque_options<Options...>::type;
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#endif
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//!This option specifies the maximum size of a block in bytes: this delimites the number of contiguous elements
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//!that will be allocated by deque as min(1u, BlockBytes/sizeof(value_type))
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//!A value zero represents the default value.
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//!
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//!\tparam BlockBytes An unsigned integer value.
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BOOST_INTRUSIVE_OPTION_CONSTANT(block_bytes, std::size_t, BlockBytes, block_bytes)
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//!This option specifies the size of a block, delimites the number of contiguous elements
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//!that will be allocated by deque as BlockSize.
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//!A value zero represents the default value.
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//!
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//!\tparam BlockBytes An unsigned integer value.
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BOOST_INTRUSIVE_OPTION_CONSTANT(block_size, std::size_t, BlockSize, block_size)
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} //namespace container {
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} //namespace boost {
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#include <boost/container/detail/config_end.hpp>
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#endif //#ifndef BOOST_CONTAINER_OPTIONS_HPP
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