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std::unordered_map::emplace

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std::unordered_map
Member-Funktionen
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Member functions
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unordered_map::unordered_map
unordered_map::~unordered_map
unordered_map::operator=
unordered_map::get_allocator
Iteratoren
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Iterators
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unordered_map::begin
unordered_map::cbegin
unordered_map::end
unordered_map::cend
Kapazität
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Capacity
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unordered_map::erase
unordered_map::size
unordered_map::max_size
Modifiers
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Modifiers
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unordered_map::clear
unordered_map::insert
unordered_map::emplace
unordered_map::emplace_hint
unordered_map::erase
unordered_map::swap
Lookup
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Lookup
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unordered_map::count
unordered_map::find
unordered_map::equal_range
Eimer Schnittstelle
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Bucket interface
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unordered_map::begin2
unordered_map::end2
unordered_map::bucket_count
unordered_map::max_bucket_count
unordered_map::bucket_size
unordered_map::bucket
Hash Politik
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Hash policy
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unordered_map::load_factor
unordered_map::max_load_factor
unordered_map::rehash
unordered_map::reserve
Beobachter
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Observers
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unordered_map::hash_function
unordered_map::key_eq
 
template< class... Args >
std::pair<iterator,bool> emplace( Args&&... args );
(seit C++11)
Fügt ein neues Element in den Behälter. Das Element in-place ist so aufgebaut, dh kein Kopieren oder Verschieben von Operationen durchgeführt werden. The constructor of the element type (value_type, that is, std::pair<const Key, T>) is called with exactly the same arguments as supplied to the function, forwarded with std::forward<Args>(args)....
Original:
Inserts a new element to the container. The element is constructed in-place, i.e. no copy or move operations are performed. The constructor of the element type (value_type, that is, std::pair<const Key, T>) is called with exactly the same arguments as supplied to the function, forwarded with std::forward<Args>(args)....
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If rehashing occurs due to the insertion, all iterators are invalidated. Otherwise iterators are not affected. References are not invalidated. Rehashing occurs only if the new number of elements is higher than max_load_factor()*bucket_count().

Inhaltsverzeichnis

[Bearbeiten] Parameter

args -
Argumente, die an den Konstruktor des Elements weiterzuleiten
Original:
arguments to forward to the constructor of the element
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[Bearbeiten] Rückgabewert

returns a pair consisting of a bool denoting whether the insertion took place and an iterator to the inserted element.

[Bearbeiten] Komplexität

Amortized constant on average, worst case linear in the size of the container.

[Bearbeiten] Siehe auch

baut Elemente in-place mit einem Hinweis
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constructs elements in-place using a hint
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(öffentliche Elementfunktion) [edit]
Einsätze Elemente
Original:
inserts elements
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(öffentliche Elementfunktion) [edit]