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	English :idprefix: compliance_ 22/10000 · 22
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	English :cpp: C++ 9/10000 · 9
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	English Closed-addressing Containers 28/10000 · 28
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	English `boost::unordered_[multi]set` and `boost::unordered_[multi]map` provide a conformant implementation for {cpp}11 (or later) compilers of the latest standard revision of {cpp} unordered associative containers, with very minor deviations as noted. The containers are fully https://en.cppreference.com/w/cpp/named_req/AllocatorAwareContainer[AllocatorAware^] and support https://en.cppreference.com/w/cpp/named_req/Allocator#Fancy_pointers[fancy pointers^]. 453/10000 · 453
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	English Deduction Guides 16/10000 · 16
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	English Deduction guides for https://en.cppreference.com/w/cpp/language/class_template_argument_deduction[class template argument deduction (CTAD)^] are only available on {cpp}17 (or later) compilers. 192/10000 · 192
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	English Piecewise Pair Emplacement 26/10000 · 26
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	English In accordance with the standard specification, `boost::unordered_[multi]map::emplace` supports piecewise pair construction: 123/10000 · 123
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	English Additionally, the same functionality is provided via non-standard `boost::unordered::piecewise_construct` and Boost.Tuple: 122/10000 · 122
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	English This feature has been retained for backwards compatibility with previous versions of Boost.Unordered: users are encouraged to update their code to use `std::piecewise_construct` and ``std::tuple``s instead. 206/10000 · 206
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	English Swap 4/10000 · 4
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	English When swapping, `Pred` and `Hash` are not currently swapped by calling `swap`, their copy constructors are used. As a consequence, when swapping an exception may be thrown from their copy constructor. 199/10000 · 199
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	English Open-addressing Containers 26/10000 · 26
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	English The C++ standard does not currently provide any open-addressing container specification to adhere to, so `boost::unordered_flat_set`/`unordered_node_set` and `boost::unordered_flat_map`/`unordered_node_map` take inspiration from `std::unordered_set` and `std::unordered_map`, respectively, and depart from their interface where convenient or as dictated by their internal data structure, which is radically different from that imposed by the standard (closed addressing). 471/10000 · 471
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	English Open-addressing containers provided by Boost.Unordered only work with reasonably compliant C++11 (or later) compilers. Language-level features such as move semantics and variadic template parameters are then not emulated. The containers are fully https://en.cppreference.com/w/cpp/named_req/AllocatorAwareContainer[AllocatorAware^] and support https://en.cppreference.com/w/cpp/named_req/Allocator#Fancy_pointers[fancy pointers^]. 430/10000 · 430
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	English The main differences with C++ unordered associative containers are: 67/10000 · 67
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	English In general: 11/10000 · 11
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	English `begin()` is not constant-time. `erase(iterator)` does not return an iterator to the following element, but a proxy object that converts to that iterator if requested; this avoids a potentially costly iterator increment operation when not needed. There is no API for bucket handling (except `bucket_count`). The maximum load factor of the container is managed internally and can't be set by the user. The maximum load, exposed through the public function `max_load`, may decrease on erasure under high-load conditions. 530/10000 · 530
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	English Flat containers (`boost::unordered_flat_set` and `boost::unordered_flat_map`): 78/10000 · 78
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	English `value_type` must be move-constructible. Pointer stability is not kept under rehashing. ** There is no API for node extraction/insertion. 143/10000 · 143

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