std::unordered_map::emplace – cppreference.com
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(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().
Parameter
| args | - | Argumente, die an den Konstruktor des Elements weiterzuleiten Original: arguments to forward to the constructor of the element The text has been machine-translated via Google Translate. |
Rückgabewert
returns a pair consisting of a bool denoting whether the insertion took place and an iterator to the inserted element.
Komplexität
Amortized constant on average, worst case linear in the size of the container.
Siehe auch
baut Elemente in-place mit einem Hinweis Original: constructs elements in-place using a hint The text has been machine-translated via Google Translate. (öffentliche Elementfunktion) [edit] | |
Elemente einfügen Original: inserts elements The text has been machine-translated via Google Translate. (öffentliche Elementfunktion) [edit] | |