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std::hash (std::bitset)

Da cppreference.com.
< cpp‎ | utility‎ | bitset

 
 
Utilità libreria
Tipo di supporto (basic types, RTTI, type traits)
Gestione della memoria dinamica
La gestione degli errori
Programma di utilità
Funzioni variadic
Data e ora
Funzione oggetti
initializer_list(C++11)
bitset
hash(C++11)
Gli operatori relazionali
Original:
Relational operators
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rel_ops::operator!=
rel_ops::operator>
rel_ops::operator<=
rel_ops::operator>=
Coppie e tuple
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Pairs and tuples
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pair
tuple(C++11)
piecewise_construct_t(C++11)
piecewise_construct(C++11)
Swap, in avanti e spostare
Original:
Swap, forward and move
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swap
forward(C++11)
move(C++11)
move_if_noexcept(C++11)
declval(C++11)
 
std::bitset
Membri tipi
Original:
Member types
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bitset::reference
Membri funzioni
Original:
Member functions
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bitset::bitset
bitset::operator==
bitset::operator!=
Elemento accesso
Original:
Element access
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bitset::operator[]
bitset::test
bitset::all
bitset::any
bitset::none
(C++11)

 
bitset::count
Capacità
Original:
Capacity
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bitset::size
Modificatori
Original:
Modifiers
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bitset::operator&=
bitset::operator|=
bitset::operator^=
bitset::operator~
bitset::operator<<=
bitset::operator>>=
bitset::operator<<
bitset::operator>>
bitset::set
bitset::reset
bitset::flip
Conversioni
Original:
Conversions
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bitset::to_string
bitset::to_ulong
bitset::to_ullong(C++11)
Non membri funzioni
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Non-member functions
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operator&
operator|
operator^
operator<<
operator>>
Helper classi
Original:
Helper classes
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std::hash(C++11)
 
template<size_t N> struct hash<bitset<N>>;
(dal C++11)
Il modello di specializzazione di std::hash per std::bitset<N> consente agli utenti di ottenere gli hash di oggetti di tipo std::bitset<N>.
Original:
The template specialization of std::hash for std::bitset<N> allows users to obtain hashes of objects of type std::bitset<N>.
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[modifica] Esempio

Il codice seguente mostra una possibile uscita di una funzione di hash utilizzato su bitset diversi:
Original:
The following code shows one possible output of a hash function used on several bitsets:
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#include <iostream>
#include <bitset>
#include <functional>
 
int main()
{
    std::bitset<4> b1(1);
    std::bitset<4> b2(2);
    std::bitset<4> b3(b2);
 
    std::hash<std::bitset<4>> hash_fn;
 
    size_t h1 = hash_fn(b1);
    size_t h2 = hash_fn(b2);
    size_t h3 = hash_fn(b3);
 
    std::cout << h1 << '\n';
    std::cout << h2 << '\n';
    std::cout << h3 << '\n';
}

Output:

67918732
118251589
118251589

[modifica] Vedi anche

(C++11)
hash function object
(classe template) [edit]