602 lines
20 KiB
Plaintext
602 lines
20 KiB
Plaintext
// (C) Copyright Jeremy Siek 2004
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// (C) Copyright Thomas Claveirole 2010
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// (C) Copyright Ignacy Gawedzki 2010
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// Distributed under the Boost Software License, Version 1.0. (See
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// 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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#ifndef BOOST_GRAPH_DETAIL_CONTAINER_TRAITS_H
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#define BOOST_GRAPH_DETAIL_CONTAINER_TRAITS_H
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// Sure would be nice to be able to forward declare these
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// instead of pulling in all the headers. Too bad that
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// is not legal. There ought to be a standard <stlfwd> header. -JGS
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#include <boost/next_prior.hpp>
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#include <algorithm> // for std::remove
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#include <utility>
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#include <vector>
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#include <list>
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#include <map>
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#include <set>
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#include <boost/unordered_set.hpp>
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#include <boost/unordered_map.hpp>
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#ifndef BOOST_NO_CXX11_HDR_UNORDERED_SET
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#include <unordered_set>
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#endif
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#ifndef BOOST_NO_CXX11_HDR_UNORDERED_MAP
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#include <unordered_map>
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#endif
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#ifdef BOOST_NO_CXX11_RVALUE_REFERENCES
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#define BOOST_PENDING_FWD_TYPE(type) const type&
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#define BOOST_PENDING_FWD_VALUE(type, var) (var)
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#else
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#define BOOST_PENDING_FWD_TYPE(type) type&&
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#define BOOST_PENDING_FWD_VALUE(type, var) (std::forward<type>((var)))
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#endif
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// The content of this file is in 'graph_detail' because otherwise
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// there will be name clashes with
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// sandbox/boost/sequence_algo/container_traits.hpp
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// The 'detail' subnamespace will still cause problems.
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namespace boost { namespace graph_detail {
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//======================================================================
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// Container Category Tags
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//
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// They use virtual inheritance because there are lots of
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// inheritance diamonds.
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struct container_tag { };
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struct forward_container_tag : virtual public container_tag { };
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struct reversible_container_tag : virtual public forward_container_tag { };
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struct random_access_container_tag
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: virtual public reversible_container_tag { };
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struct sequence_tag : virtual public forward_container_tag { };
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struct associative_container_tag : virtual public forward_container_tag { };
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struct sorted_associative_container_tag
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: virtual public associative_container_tag,
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virtual public reversible_container_tag { };
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struct front_insertion_sequence_tag : virtual public sequence_tag { };
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struct back_insertion_sequence_tag : virtual public sequence_tag { };
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struct unique_associative_container_tag
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: virtual public associative_container_tag { };
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struct multiple_associative_container_tag
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: virtual public associative_container_tag { };
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struct simple_associative_container_tag
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: virtual public associative_container_tag { };
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struct pair_associative_container_tag
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: virtual public associative_container_tag { };
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//======================================================================
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// Iterator Stability Tags
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//
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// Do mutating operations such as insert/erase/resize invalidate all
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// outstanding iterators?
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struct stable_tag { };
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struct unstable_tag { };
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//======================================================================
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// Container Traits Class and container_category() function
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// don't use this unless there is partial specialization
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template <class Container>
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struct container_traits {
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typedef typename Container::category category;
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typedef typename Container::iterator_stability iterator_stability;
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};
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// Use this as a compile-time assertion that X is stable
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inline void require_stable(stable_tag) { }
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// std::vector
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struct vector_tag :
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virtual public random_access_container_tag,
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virtual public back_insertion_sequence_tag { };
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template <class T, class Alloc>
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vector_tag container_category(const std::vector<T,Alloc>&)
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{ return vector_tag(); }
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template <class T, class Alloc>
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unstable_tag iterator_stability(const std::vector<T,Alloc>&)
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{ return unstable_tag(); }
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template <class T, class Alloc>
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struct container_traits< std::vector<T,Alloc> > {
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typedef vector_tag category;
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typedef unstable_tag iterator_stability;
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};
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// std::list
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struct list_tag :
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virtual public reversible_container_tag,
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virtual public back_insertion_sequence_tag
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// this causes problems for push_dispatch...
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// virtual public front_insertion_sequence_tag
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{ };
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template <class T, class Alloc>
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list_tag container_category(const std::list<T,Alloc>&)
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{ return list_tag(); }
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template <class T, class Alloc>
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stable_tag iterator_stability(const std::list<T,Alloc>&)
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{ return stable_tag(); }
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template <class T, class Alloc>
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struct container_traits< std::list<T,Alloc> > {
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typedef list_tag category;
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typedef stable_tag iterator_stability;
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};
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// std::set
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struct set_tag :
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virtual public sorted_associative_container_tag,
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virtual public simple_associative_container_tag,
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virtual public unique_associative_container_tag
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{ };
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template <class Key, class Cmp, class Alloc>
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set_tag container_category(const std::set<Key,Cmp,Alloc>&)
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{ return set_tag(); }
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template <class Key, class Cmp, class Alloc>
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stable_tag iterator_stability(const std::set<Key,Cmp,Alloc>&)
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{ return stable_tag(); }
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template <class Key, class Cmp, class Alloc>
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struct container_traits< std::set<Key,Cmp,Alloc> > {
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typedef set_tag category;
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typedef stable_tag iterator_stability;
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};
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// std::multiset
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struct multiset_tag :
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virtual public sorted_associative_container_tag,
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virtual public simple_associative_container_tag,
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virtual public multiple_associative_container_tag
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{ };
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template <class Key, class Cmp, class Alloc>
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multiset_tag container_category(const std::multiset<Key,Cmp,Alloc>&)
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{ return multiset_tag(); }
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template <class Key, class Cmp, class Alloc>
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stable_tag iterator_stability(const std::multiset<Key,Cmp,Alloc>&)
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{ return stable_tag(); }
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template <class Key, class Cmp, class Alloc>
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struct container_traits< std::multiset<Key,Cmp,Alloc> > {
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typedef multiset_tag category;
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typedef stable_tag iterator_stability;
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};
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// deque
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// std::map
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struct map_tag :
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virtual public sorted_associative_container_tag,
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virtual public pair_associative_container_tag,
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virtual public unique_associative_container_tag
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{ };
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template <class Key, class T, class Cmp, class Alloc>
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struct container_traits< std::map<Key,T,Cmp,Alloc> > {
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typedef map_tag category;
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typedef stable_tag iterator_stability;
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};
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template <class Key, class T, class Cmp, class Alloc>
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map_tag container_category(const std::map<Key,T,Cmp,Alloc>&)
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{ return map_tag(); }
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template <class Key, class T, class Cmp, class Alloc>
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stable_tag iterator_stability(const std::map<Key,T,Cmp,Alloc>&)
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{ return stable_tag(); }
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// std::multimap
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struct multimap_tag :
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virtual public sorted_associative_container_tag,
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virtual public pair_associative_container_tag,
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virtual public multiple_associative_container_tag
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{ };
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template <class Key, class T, class Cmp, class Alloc>
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struct container_traits< std::multimap<Key,T,Cmp,Alloc> > {
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typedef multimap_tag category;
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typedef stable_tag iterator_stability;
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};
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template <class Key, class T, class Cmp, class Alloc>
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multimap_tag container_category(const std::multimap<Key,T,Cmp,Alloc>&)
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{ return multimap_tag(); }
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template <class Key, class T, class Cmp, class Alloc>
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stable_tag iterator_stability(const std::multimap<Key,T,Cmp,Alloc>&)
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{ return stable_tag(); }
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// hash_set, hash_map
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struct unordered_set_tag :
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virtual public simple_associative_container_tag,
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virtual public unique_associative_container_tag
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{ };
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struct unordered_multiset_tag :
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virtual public simple_associative_container_tag,
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virtual public multiple_associative_container_tag
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{ };
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struct unordered_map_tag :
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virtual public pair_associative_container_tag,
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virtual public unique_associative_container_tag
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{ };
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struct unordered_multimap_tag :
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virtual public pair_associative_container_tag,
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virtual public multiple_associative_container_tag
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{ };
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template <class Key, class Eq, class Hash, class Alloc>
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struct container_traits< boost::unordered_set<Key,Eq,Hash,Alloc> > {
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typedef unordered_set_tag category;
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typedef unstable_tag iterator_stability;
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};
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template <class Key, class T, class Eq, class Hash, class Alloc>
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struct container_traits< boost::unordered_map<Key,T,Eq,Hash,Alloc> > {
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typedef unordered_map_tag category;
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typedef unstable_tag iterator_stability;
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};
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template <class Key, class Eq, class Hash, class Alloc>
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struct container_traits< boost::unordered_multiset<Key,Eq,Hash,Alloc> > {
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typedef unordered_multiset_tag category;
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typedef unstable_tag iterator_stability;
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};
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template <class Key, class T, class Eq, class Hash, class Alloc>
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struct container_traits< boost::unordered_multimap<Key,T,Eq,Hash,Alloc> > {
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typedef unordered_multimap_tag category;
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typedef unstable_tag iterator_stability;
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};
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template <class Key, class Eq, class Hash, class Alloc>
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unordered_set_tag
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container_category(const boost::unordered_set<Key,Eq,Hash,Alloc>&)
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{ return unordered_set_tag(); }
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template <class Key, class T, class Eq, class Hash, class Alloc>
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unordered_map_tag
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container_category(const boost::unordered_map<Key,T,Eq,Hash,Alloc>&)
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{ return unordered_map_tag(); }
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template <class Key, class Eq, class Hash, class Alloc>
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unstable_tag iterator_stability(const boost::unordered_set<Key,Eq,Hash,Alloc>&)
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{ return unstable_tag(); }
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template <class Key, class T, class Eq, class Hash, class Alloc>
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unstable_tag iterator_stability(const boost::unordered_map<Key,T,Eq,Hash,Alloc>&)
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{ return unstable_tag(); }
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template <class Key, class Eq, class Hash, class Alloc>
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unordered_multiset_tag
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container_category(const boost::unordered_multiset<Key,Eq,Hash,Alloc>&)
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{ return unordered_multiset_tag(); }
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template <class Key, class T, class Eq, class Hash, class Alloc>
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unordered_multimap_tag
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container_category(const boost::unordered_multimap<Key,T,Eq,Hash,Alloc>&)
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{ return unordered_multimap_tag(); }
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template <class Key, class Eq, class Hash, class Alloc>
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unstable_tag
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iterator_stability(const boost::unordered_multiset<Key,Eq,Hash,Alloc>&)
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{ return unstable_tag(); }
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template <class Key, class T, class Eq, class Hash, class Alloc>
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unstable_tag
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iterator_stability(const boost::unordered_multimap<Key,T,Eq,Hash,Alloc>&)
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{ return unstable_tag(); }
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#ifndef BOOST_NO_CXX11_HDR_UNORDERED_SET
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template <class Key, class Eq, class Hash, class Alloc>
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struct container_traits< std::unordered_set<Key,Eq,Hash,Alloc> > {
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typedef unordered_set_tag category;
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typedef unstable_tag iterator_stability;
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};
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#endif
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#ifndef BOOST_NO_CXX11_HDR_UNORDERED_MAP
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template <class Key, class T, class Eq, class Hash, class Alloc>
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struct container_traits< std::unordered_map<Key,T,Eq,Hash,Alloc> > {
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typedef unordered_map_tag category;
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typedef unstable_tag iterator_stability;
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};
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#endif
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#ifndef BOOST_NO_CXX11_HDR_UNORDERED_SET
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template <class Key, class Eq, class Hash, class Alloc>
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struct container_traits< std::unordered_multiset<Key,Eq,Hash,Alloc> > {
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typedef unordered_multiset_tag category;
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typedef unstable_tag iterator_stability;
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};
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#endif
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#ifndef BOOST_NO_CXX11_HDR_UNORDERED_MAP
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template <class Key, class T, class Eq, class Hash, class Alloc>
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struct container_traits< std::unordered_multimap<Key,T,Eq,Hash,Alloc> > {
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typedef unordered_multimap_tag category;
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typedef unstable_tag iterator_stability;
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};
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#endif
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#ifndef BOOST_NO_CXX11_HDR_UNORDERED_SET
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template <class Key, class Eq, class Hash, class Alloc>
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unordered_set_tag
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container_category(const std::unordered_set<Key,Eq,Hash,Alloc>&)
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{ return unordered_set_tag(); }
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#endif
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#ifndef BOOST_NO_CXX11_HDR_UNORDERED_MAP
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template <class Key, class T, class Eq, class Hash, class Alloc>
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unordered_map_tag
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container_category(const std::unordered_map<Key,T,Eq,Hash,Alloc>&)
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{ return unordered_map_tag(); }
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#endif
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#ifndef BOOST_NO_CXX11_HDR_UNORDERED_SET
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template <class Key, class Eq, class Hash, class Alloc>
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unstable_tag iterator_stability(const std::unordered_set<Key,Eq,Hash,Alloc>&)
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{ return unstable_tag(); }
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#endif
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#ifndef BOOST_NO_CXX11_HDR_UNORDERED_MAP
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template <class Key, class T, class Eq, class Hash, class Alloc>
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unstable_tag iterator_stability(const std::unordered_map<Key,T,Eq,Hash,Alloc>&)
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{ return unstable_tag(); }
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#endif
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#ifndef BOOST_NO_CXX11_HDR_UNORDERED_SET
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template <class Key, class Eq, class Hash, class Alloc>
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unordered_multiset_tag
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container_category(const std::unordered_multiset<Key,Eq,Hash,Alloc>&)
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{ return unordered_multiset_tag(); }
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#endif
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#ifndef BOOST_NO_CXX11_HDR_UNORDERED_MAP
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template <class Key, class T, class Eq, class Hash, class Alloc>
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unordered_multimap_tag
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container_category(const std::unordered_multimap<Key,T,Eq,Hash,Alloc>&)
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{ return unordered_multimap_tag(); }
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#endif
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#ifndef BOOST_NO_CXX11_HDR_UNORDERED_SET
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template <class Key, class Eq, class Hash, class Alloc>
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unstable_tag
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iterator_stability(const std::unordered_multiset<Key,Eq,Hash,Alloc>&)
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{ return unstable_tag(); }
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#endif
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#ifndef BOOST_NO_CXX11_HDR_UNORDERED_MAP
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template <class Key, class T, class Eq, class Hash, class Alloc>
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unstable_tag
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iterator_stability(const std::unordered_multimap<Key,T,Eq,Hash,Alloc>&)
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{ return unstable_tag(); }
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#endif
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//===========================================================================
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// Generalized Container Functions
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// Erase
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template <class Sequence, class T>
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void erase_dispatch(Sequence& c, const T& x,
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sequence_tag)
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{
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c.erase(std::remove(c.begin(), c.end(), x), c.end());
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}
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template <class AssociativeContainer, class T>
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void erase_dispatch(AssociativeContainer& c, const T& x,
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associative_container_tag)
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{
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c.erase(x);
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}
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template <class Container, class T>
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void erase(Container& c, const T& x)
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{
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erase_dispatch(c, x, container_category(c));
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}
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// Erase If
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template <class Sequence, class Predicate, class IteratorStability>
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void erase_if_dispatch(Sequence& c, Predicate p,
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sequence_tag, IteratorStability)
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{
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#if 0
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c.erase(std::remove_if(c.begin(), c.end(), p), c.end());
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#else
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if (! c.empty())
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c.erase(std::remove_if(c.begin(), c.end(), p), c.end());
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#endif
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}
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template <class AssociativeContainer, class Predicate>
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void erase_if_dispatch(AssociativeContainer& c, Predicate p,
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associative_container_tag, stable_tag)
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{
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typename AssociativeContainer::iterator i, next;
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for (i = next = c.begin(); next != c.end(); i = next) {
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++next;
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if (p(*i))
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c.erase(i);
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}
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}
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template <class AssociativeContainer, class Predicate>
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void erase_if_dispatch(AssociativeContainer& c, Predicate p,
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associative_container_tag, unstable_tag)
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{
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// This method is really slow, so hopefully we won't have any
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// associative containers with unstable iterators!
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// Is there a better way to do this?
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typename AssociativeContainer::iterator i;
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typename AssociativeContainer::size_type n = c.size();
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while (n--)
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for (i = c.begin(); i != c.end(); ++i)
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if (p(*i)) {
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c.erase(i);
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break;
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}
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}
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template <class Container, class Predicate>
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void erase_if(Container& c, Predicate p)
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{
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erase_if_dispatch(c, p, container_category(c), iterator_stability(c));
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}
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// Push
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template <class Container, class T>
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std::pair<typename Container::iterator, bool>
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push_dispatch(Container& c, BOOST_PENDING_FWD_TYPE(T) v, back_insertion_sequence_tag)
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{
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c.push_back(BOOST_PENDING_FWD_VALUE(T, v));
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return std::make_pair(boost::prior(c.end()), true);
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}
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template <class Container, class T>
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std::pair<typename Container::iterator, bool>
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push_dispatch(Container& c, BOOST_PENDING_FWD_TYPE(T) v, front_insertion_sequence_tag)
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{
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c.push_front(BOOST_PENDING_FWD_VALUE(T, v));
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return std::make_pair(c.begin(), true);
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}
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template <class AssociativeContainer, class T>
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std::pair<typename AssociativeContainer::iterator, bool>
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push_dispatch(AssociativeContainer& c, BOOST_PENDING_FWD_TYPE(T) v,
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unique_associative_container_tag)
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{
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return c.insert(BOOST_PENDING_FWD_VALUE(T, v));
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}
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template <class AssociativeContainer, class T>
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std::pair<typename AssociativeContainer::iterator, bool>
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push_dispatch(AssociativeContainer& c, BOOST_PENDING_FWD_TYPE(T) v,
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multiple_associative_container_tag)
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{
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|
return std::make_pair(c.insert(BOOST_PENDING_FWD_VALUE(T, v)), true);
|
|
}
|
|
|
|
template <class Container, class T>
|
|
std::pair<typename Container::iterator,bool>
|
|
push(Container& c, BOOST_PENDING_FWD_TYPE(T) v)
|
|
{
|
|
return push_dispatch(c, BOOST_PENDING_FWD_VALUE(T, v), container_category(c));
|
|
}
|
|
|
|
// Find
|
|
template <class Container, class Value>
|
|
typename Container::iterator
|
|
find_dispatch(Container& c,
|
|
const Value& value,
|
|
container_tag)
|
|
{
|
|
return std::find(c.begin(), c.end(), value);
|
|
}
|
|
|
|
template <class AssociativeContainer, class Value>
|
|
typename AssociativeContainer::iterator
|
|
find_dispatch(AssociativeContainer& c,
|
|
const Value& value,
|
|
associative_container_tag)
|
|
{
|
|
return c.find(value);
|
|
}
|
|
|
|
template <class Container, class Value>
|
|
typename Container::iterator
|
|
find(Container& c,
|
|
const Value& value)
|
|
{
|
|
return find_dispatch(c, value,
|
|
graph_detail::container_category(c));
|
|
}
|
|
|
|
// Find (const versions)
|
|
template <class Container, class Value>
|
|
typename Container::const_iterator
|
|
find_dispatch(const Container& c,
|
|
const Value& value,
|
|
container_tag)
|
|
{
|
|
return std::find(c.begin(), c.end(), value);
|
|
}
|
|
|
|
template <class AssociativeContainer, class Value>
|
|
typename AssociativeContainer::const_iterator
|
|
find_dispatch(const AssociativeContainer& c,
|
|
const Value& value,
|
|
associative_container_tag)
|
|
{
|
|
return c.find(value);
|
|
}
|
|
|
|
template <class Container, class Value>
|
|
typename Container::const_iterator
|
|
find(const Container& c,
|
|
const Value& value)
|
|
{
|
|
return find_dispatch(c, value,
|
|
graph_detail::container_category(c));
|
|
}
|
|
|
|
// Equal range
|
|
#if 0
|
|
// Make the dispatch fail if c is not an Associative Container (and thus
|
|
// doesn't have equal_range unless it is sorted, which we cannot check
|
|
// statically and is not typically true for BGL's uses of this function).
|
|
template <class Container,
|
|
class LessThanComparable>
|
|
std::pair<typename Container::iterator, typename Container::iterator>
|
|
equal_range_dispatch(Container& c,
|
|
const LessThanComparable& value,
|
|
container_tag)
|
|
{
|
|
// c must be sorted for std::equal_range to behave properly.
|
|
return std::equal_range(c.begin(), c.end(), value);
|
|
}
|
|
#endif
|
|
|
|
template <class AssociativeContainer, class Value>
|
|
std::pair<typename AssociativeContainer::iterator,
|
|
typename AssociativeContainer::iterator>
|
|
equal_range_dispatch(AssociativeContainer& c,
|
|
const Value& value,
|
|
associative_container_tag)
|
|
{
|
|
return c.equal_range(value);
|
|
}
|
|
|
|
template <class Container, class Value>
|
|
std::pair<typename Container::iterator, typename Container::iterator>
|
|
equal_range(Container& c,
|
|
const Value& value)
|
|
{
|
|
return equal_range_dispatch(c, value,
|
|
graph_detail::container_category(c));
|
|
}
|
|
|
|
}} // namespace boost::graph_detail
|
|
|
|
#undef BOOST_PENDING_FWD_TYPE
|
|
#undef BOOST_PENDING_FWD_VALUE
|
|
|
|
#endif // BOOST_GRAPH_DETAIL_CONTAINER_TRAITS_H
|