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std::list::empty

De cppreference.com
< cpp‎ | container‎ | list

 
 
 
std::list
Les fonctions membres
Original:
Member functions
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list::list
list::~list
list::operator=
list::assign
list::get_allocator
Elément d'accès
Original:
Element access
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list::front
list::back
Les itérateurs
Original:
Iterators
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list::begin
list::cbegin

(C++11)
list::end
list::cend

(C++11)
list::rbegin
list::crbegin

(C++11)
list::rend
list::crend

(C++11)
Capacité
Original:
Capacity
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list::empty
list::size
list::max_size
Modificateurs
Original:
Modifiers
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list::clear
list::insert
list::emplace (C++11)
list::erase
list::push_front
list::emplace_front (C++11)
list::pop_front
list::push_back
list::emplace_back (C++11)
list::pop_back
list::resize
list::swap
Opérations
Original:
Operations
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list::merge
list::splice
list::remove
list::remove_if
list::reverse
list::unique
list::sort
 
bool empty() const;
Vérifie si le conteneur n'a pas d'éléments, à savoir si begin() == end() .
Original:
Checks if the container has no elements, i.e. whether begin() == end().
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Sommaire

[modifier] Paramètres

(Aucun)
Original:
(none)
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[modifier] Retourne la valeur

true si le récipient est vide, sinon false
Original:
true if the container is empty, false otherwise
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[modifier] Exceptions

noexcept specification:  
noexcept
   (depuis C++11)

[modifier] Complexité

Constante
Original:
Constant
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[modifier] Exemple

Le code suivant utilise empty pour vérifier si un std::list<int> contient des éléments:
Original:
The following code uses empty to check if a std::list<int> contains any elements:
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#include <list>
#include <iostream>
 
int main()
{
    std::list<int> numbers;
    std::cout << "Initially, numbers.empty(): " << numbers.empty() << '\n';
 
    numbers.push_back(42);
    numbers.push_back(13317); 
    std::cout << "After adding elements, numbers.empty(): " << numbers.empty() << '\n';
}

Résultat :

Initially, numbers.empty(): 1
After adding elements, numbers.empty(): 0

See also

retourne le nombre d'éléments
Original:
returns the number of elements
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(fonction membre publique) [edit]