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    std::map::operator[]

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    <metanoindex/>

     
    C++
     
    Container-Bibliothek
     
    std::map
    Member-Funktionen
    Original:
    Member functions
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    map::map
    map::~map
    map::operator=
    map::get_allocator
    Elementzugriff zerstört
    Original:
    Element access
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    map::at
    map::operator[]
    Iteratoren
    Original:
    Iterators
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    map::begin
    map::cbegin
    (C++11)
    map::end
    map::cend
    (C++11)
    map::rbegin
    map::crbegin
    (C++11)
    map::rend
    map::crend
    (C++11)
    Kapazität
    Original:
    Capacity
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    map::empty
    map::size
    map::max_size
    Modifiers
    Original:
    Modifiers
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    map::clear
    map::insert
    map::emplace(C++11)
    map::emplace_hint(C++11)
    map::erase
    map::swap
    Lookup
    Original:
    Lookup
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    map::count
    map::find
    map::equal_range
    map::lower_bound
    map::upper_bound
    Beobachter
    Original:
    Observers
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    map::key_comp
    map::value_comp
     
    <tbody> </tbody>
    T& operator[]( const Key& key );
    		 (1)
    T& operator[]( Key&& key );
    		 (2) (seit C++11)
    Fügt ein neues Element in den Behälter mit key als Schlüssel und Standard gebaut mapped Wert und gibt einen Verweis auf das neu errichtete kartiert Wert. Wenn ein Element mit Schlüssel key bereits existiert, wird keine Insertion durchgeführt und ein Verweis auf seine kartiert Wert zurückgegeben .
    Original:
    Inserts a new element to the container using key as the key and default constructed mapped value and returns a reference to the newly constructed mapped value. If an element with key key already exists, no insertion is performed and a reference to its mapped value is returned.
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    1)

    Führt im wesentlichen (insert(std::make_pair(key, T())).first)->second .
    Original:
    Essentially performs (insert(std::make_pair(key, T())).first)->second.
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    2)

    Führt im wesentlichen (insert(std::make_pair(std::move(key), T())).first)->second .
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    Essentially performs (insert(std::make_pair(std::move(key), T())).first)->second.
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    No iterators or references are invalidated.

    Parameter

    key -
    der Schlüssel des Elements zu finden
    Original:
    the key of the element to find
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    Rückgabewert

    Bezugnahme auf den zugeordneten Wert des neuen Elements, wenn kein Element mit Schlüssel key existierte. Andernfalls wird ein Verweis auf das zugeordnete Wert der bestehenden Element zurückgegeben .
    Original:
    Reference to the mapped value of the new element if no element with key key existed. Otherwise a reference to the mapped value of the existing element is returned.
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    Komplexität

    Logarithmic in the size of the container.

    Beispiel

    This section is incomplete
    Reason: no example

    Siehe auch

    (C++11)
    Zugriff auf angegebene Element mit Überprüfung von Grenzen
    Original:
    access specified element with bounds checking
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    (öffentliche Elementfunktion) [edit]