Header der Standardbibliothek <utility>

Diese Headerdatei ist Teil der Bibliothek general utility.

Vorlage:cpp/header/dsc initializer list Vorlage:cpp/utility/dsc unreachable

Inhaltsverzeichnis 1 Inkludierte Headerdateien 2 Namensräume 3 Funktionen 4 Klassen 4.1 Vorwärtsdeklarationen 5 Hilfsfunktionen 6 Inhaltsübersicht 6.1 Klassetemplate std::integer_sequence 6.2 Klassentemplate std::pair 7 Referenzen Inkludierte Headerdateien

<compare> (C++20)	Operator für den Dreiwegevergleich [edit]
Namensräume

`rel_ops`	stellt automatische Vergleichsoperatoren zur Verfügung
definiert in Namensraum `std::rel_ops`

operator!= operator> operator<= operator>=	automatically generates comparison operators based on user-defined `operator==` and `operator<` (Funktions-Template) [edit]
Funktionen

swap	tauscht die Werte von zwei Objekten Original: swaps the values of two objects The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (Funktions-Template) [edit]

exchange (C++14)	ersetzt das Argument durch einen neuen Wert und gibt den alten Wert zurück (Funktions-Template) [edit]

forward (C++11)	leitet eine Funktion Argument Original: forwards a function argument The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (Funktions-Template) [edit]

move (C++11)	erhält einen rvalue Referenz Original: obtains an rvalue reference The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (Funktions-Template) [edit]

move_if_noexcept (C++11)	erhält eine rvalue Referenz, wenn der Umzug Konstruktor nicht werfen wird Original: obtains an rvalue reference if the move constructor does not throw The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (Funktions-Template) [edit]

as_const (C++17)	erzeugt eine Referenz auf eine Konstante des Argumentes (Funktions-Template) [edit]

declval (C++11)	erhält die Art des Ausdrucks in unevaluierten Kontext Original: obtains the type of expression in unevaluated context The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (Funktions-Template) [edit]

to_underlying (C++23)	konvertiert einen Aufzählungswert in den zugrundeliegenden Typ der Aufzählung (Funktions-Template) [edit]

cmp_equal cmp_not_equal cmp_less cmp_greater cmp_less_equal cmp_greater_equal (C++20)	vergleicht zwei Ganzzahlen ohne Wertveränderung durch Konvertierung (Funktions-Template) [edit]

in_range (C++20)	überprüft, ob ein Ganzzahlwert im Wertebereich eines gegebenen Ganzzahltyps liegt (Funktions-Template) [edit]

make_pair	schafft eine `pair` Objekt des Typs, durch das Argument definiert Original: creates a `pair` object of type, defined by the argument types The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (Funktions-Template) [edit]

operator== operator!= operator< operator<= operator> operator>=	vergleicht die Werte in dem Paar lexikographisch Original: lexicographically compares the values in the pair The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (Funktions-Template) [edit]

std::swap(std::pair) (C++11)	spezialisiert die std::swap Algorithmus Original: specializes the std::swap algorithm The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (Funktions-Template) [edit]

std::get(std::pair) (C++11)	greift ein Element eines `pair` Original: accesses an element of a `pair` The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (Funktions-Template) [edit]
Klassen

pair	implementiert binären Tupel, d.h. ein Paar von Werten Original: implements binary tuple, i.e. a pair of values The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (Klassen-Template) [edit]

tuple_size (C++11)	gibt die Anzahl der Elemente für einen Typ, der sich wie ein std::tuple verhält (Klassen-Template) [edit]

tuple_element (C++11)	gibt den Typ eines Elementes für einen Typ, der sich wie ein std::tuple verhält (Klassen-Template) [edit]

std::tuple_size<std::pair> (C++11)	erhält die Größe eines `pair` Original: obtains the size of a `pair` The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (class Template-Spezialisierung) [edit]

std::tuple_element<std::pair> (C++11)	ermittelt die Art der Elemente der `pair` Original: obtains the type of the elements of `pair` The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (class Template-Spezialisierung) [edit]

integer_sequence (C++14)	bietet eine Folge von Ganzzahlen zur Kompilationszeit (Klassen-Template) [edit]
Vorwärtsdeklarationen
definiert in Header `<tuple>`

tuple (C++11)	implementiert Container fester Größe, die Elemente von potentiell unterschiedlichen Datentypen enthalten können Original: implements fixed size container, which holds elements of possibly different types The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (Klassen-Template) [edit]
Hilfsfunktionen

piecewise_construct_t (C++11)	Tag-Typ verwendet werden, um die korrekte Funktion Überlast für stückweise Konstruktion auszuwählen Original: tag type used to select correct function overload for piecewise construction The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (Klasse) [edit]

piecewise_construct (C++11)	ein Objekt vom Typ `piecewise_construct_t` verwendet, um Funktionen für stückweise Konstruktion eindeutig zu machen Original: an object of type `piecewise_construct_t` used to disambiguate functions for piecewise construction The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (konstanten) [edit]

in_place in_place_type in_place_index in_place_t in_place_type_t in_place_index_t (C++17)	Marker für in-place-Konstruktion (Klassen-Template) [edit]

Inhaltsübersicht

#include <compare>
#include <initializer_list>

namespace std {
  // swap
  template<class T>
    constexpr void swap(T& a, T& b) noexcept(/* see description */);
  template<class T, size_t N>
    constexpr void swap(T (&a)[N], T (&b)[N]) noexcept(is_nothrow_swappable_v<T>);

  // exchange
  template<class T, class U = T>
    constexpr T exchange(T& obj, U&& new_val);

  // forward/move
  template<class T>
    constexpr T&& forward(remove_reference_t<T>& t) noexcept;
  template<class T>
    constexpr T&& forward(remove_reference_t<T>&& t) noexcept;
  template<class T>
    constexpr remove_reference_t<T>&& move(T&&) noexcept;
  template<class T>
    constexpr conditional_t<
        !is_nothrow_move_constructible_v<T> && is_copy_constructible_v<T>, const T&, T&&>
      move_if_noexcept(T& x) noexcept;

  // as_const
  template<class T>
    constexpr add_const_t<T>& as_const(T& t) noexcept;
  template<class T>
    void as_const(const T&&) = delete;

  // declval
  template<class T>
    add_rvalue_reference_t<T> declval() noexcept;   // as unevaluated operand

  // integer comparison functions
  template<class T, class U>
    constexpr bool cmp_equal(T t, U u) noexcept;
  template<class T, class U>
    constexpr bool cmp_not_equal(T t, U u) noexcept;

  template<class T, class U>
    constexpr bool cmp_less(T t, U u) noexcept;
  template<class T, class U>
    constexpr bool cmp_greater(T t, U u) noexcept;
  template<class T, class U>
    constexpr bool cmp_less_equal(T t, U u) noexcept;
  template<class T, class U>
    constexpr bool cmp_greater_equal(T t, U u) noexcept;

  template<class R, class T>
    constexpr bool in_range(T t) noexcept;
  
  // to_underlying
  template<class T>
    constexpr underlying_type_t<T> to_underlying(T value) noexcept;

  // compile-time integer sequences
  template<class T, T...>
    struct integer_sequence;
  template<size_t... I>
    using index_sequence = integer_sequence<size_t, I...>;

  template<class T, T N>
    using make_integer_sequence = integer_sequence<T, /* see description */>;
  template<size_t N>
    using make_index_sequence = make_integer_sequence<size_t, N>;

  template<class... T>
    using index_sequence_for = make_index_sequence<sizeof...(T)>;

  // class template pair
  template<class T1, class T2>
    struct pair;

  // pair specialized algorithms
  template<class T1, class T2>
    constexpr bool operator==(const pair<T1, T2>&, const pair<T1, T2>&);
  template<class T1, class T2>
    constexpr common_comparison_category_t</*synth-three-way-result*/<T1>,
                                           /*synth-three-way-result*/<T2>>
      operator<=>(const pair<T1, T2>&, const pair<T1, T2>&);

  template<class T1, class T2>
    constexpr void swap(pair<T1, T2>& x, pair<T1, T2>& y) noexcept(noexcept(x.swap(y)));

  template<class T1, class T2>
    constexpr /* see description */ make_pair(T1&&, T2&&);

  // tuple-like access to pair
  template<class T> struct tuple_size;
  template<size_t I, class T> struct tuple_element;

  template<class T1, class T2> struct tuple_size<pair<T1, T2>>;
  template<size_t I, class T1, class T2> struct tuple_element<I, pair<T1, T2>>;

  template<size_t I, class T1, class T2>
    constexpr tuple_element_t<I, pair<T1, T2>>& get(pair<T1, T2>&) noexcept;
  template<size_t I, class T1, class T2>
    constexpr tuple_element_t<I, pair<T1, T2>>&& get(pair<T1, T2>&&) noexcept;
  template<size_t I, class T1, class T2>
    constexpr const tuple_element_t<I, pair<T1, T2>>& get(const pair<T1, T2>&) noexcept;
  template<size_t I, class T1, class T2>
    constexpr const tuple_element_t<I, pair<T1, T2>>&& get(const pair<T1, T2>&&) noexcept;
  template<class T1, class T2>
    constexpr T1& get(pair<T1, T2>& p) noexcept;
  template<class T1, class T2>
    constexpr const T1& get(const pair<T1, T2>& p) noexcept;
  template<class T1, class T2>
    constexpr T1&& get(pair<T1, T2>&& p) noexcept;
  template<class T1, class T2>
    constexpr const T1&& get(const pair<T1, T2>&& p) noexcept;
  template<class T2, class T1>
    constexpr T2& get(pair<T1, T2>& p) noexcept;
  template<class T2, class T1>
    constexpr const T2& get(const pair<T1, T2>& p) noexcept;
  template<class T2, class T1>
    constexpr T2&& get(pair<T1, T2>&& p) noexcept;
  template<class T2, class T1>
    constexpr const T2&& get(const pair<T1, T2>&& p) noexcept;

  // pair piecewise construction
  struct piecewise_construct_t {
    explicit piecewise_construct_t() = default;
  };
  inline constexpr piecewise_construct_t piecewise_construct{};
  template<class... Types> class tuple;         // defined in <tuple>

  // in-place construction
  struct in_place_t {
    explicit in_place_t() = default;
  };
  inline constexpr in_place_t in_place{};

  template<class T>
    struct in_place_type_t {
      explicit in_place_type_t() = default;
    };
  template<class T> inline constexpr in_place_type_t<T> in_place_type{};

  template<size_t I>
    struct in_place_index_t {
      explicit in_place_index_t() = default;
    };
  template<size_t I> inline constexpr in_place_index_t<I> in_place_index{};

  // unreachable
  [[noreturn]] void unreachable();
}

// deprecated
namespace std::rel_ops {
  template<class T> bool operator!=(const T&, const T&);
  template<class T> bool operator> (const T&, const T&);
  template<class T> bool operator<=(const T&, const T&);
  template<class T> bool operator>=(const T&, const T&);
}

Klassetemplate std::integer_sequence

namespace std {
  template<class T, T... I> struct integer_sequence {
    using value_type = T;
    static constexpr size_t size() noexcept { return sizeof...(I); }
  };
}

Klassentemplate std::pair

namespace std {
  template<class T1, class T2>
  struct pair {
    using first_type  = T1;
    using second_type = T2;

    T1 first;
    T2 second;

    pair(const pair&) = default;
    pair(pair&&) = default;
    constexpr explicit(/* see description */) pair();
    constexpr explicit(/* see description */) pair(const T1& x, const T2& y);
    template<class U1 = T1, class U2 = T2>
      constexpr explicit(/* see description */) pair(U1&& x, U2&& y);
    template<class U1, class U2>
      constexpr explicit(/* see description */) pair(const pair<U1, U2>& p);
    template<class U1, class U2>
      constexpr explicit(/* see description */) pair(pair<U1, U2>&& p);
    template<class... Args1, class... Args2>
      constexpr pair(piecewise_construct_t,
                     tuple<Args1...> first_args, tuple<Args2...> second_args);

    constexpr pair& operator=(const pair& p);
    template<class U1, class U2>
      constexpr pair& operator=(const pair<U1, U2>& p);
    constexpr pair& operator=(pair&& p) noexcept(/* see description */);
    template<class U1, class U2>
      constexpr pair& operator=(pair<U1, U2>&& p);

    constexpr void swap(pair& p) noexcept(/* see description */);
  };

  template<class T1, class T2>
    pair(T1, T2) -> pair<T1, T2>;
}

Referenzen

Vorlage:cpp/header/dsc tuple

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Header der Standardbibliothek <utility>

Inhaltsverzeichnis

Inkludierte Headerdateien

Namensräume

Funktionen

Klassen

Vorwärtsdeklarationen

Hilfsfunktionen

Inhaltsübersicht

Klassetemplate std::integer_sequence

Klassentemplate std::pair

Referenzen

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