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std::list::empty

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< cpp‎ | container‎ | list

 
 
 
std::list
Member-Funktionen
Original:
Member functions
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list::list
list::~list
list::operator=
list::assign
list::get_allocator
Elementzugriff zerstört
Original:
Element access
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list::front
list::back
Iteratoren
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)
Kapazität
Original:
Capacity
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list::empty
list::size
list::max_size
Modifiers
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
Operations
Original:
Operations
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list::merge
list::splice
list::remove
list::remove_if
list::reverse
list::unique
list::sort
 
bool empty() const;
Prüft, ob der Behälter keine Elemente, dh ob begin() == end() .
Original:
Checks if the container has no elements, i.e. whether begin() == end().
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Inhaltsverzeichnis

[Bearbeiten] Parameter

(None)
Original:
(none)
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[Bearbeiten] Rückgabewert

true wenn der Behälter leer ist, false anders
Original:
true if the container is empty, false otherwise
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[Bearbeiten] Ausnahmen

noexcept specification:  
noexcept
  (seit C++11)

[Bearbeiten] Komplexität

Constant
Original:
Constant
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[Bearbeiten] Beispiel

Der folgende Code verwendet empty, um zu überprüfen, ob ein std::list<int> enthält alle Elemente:
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';
}

Output:

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

See also

liefert die Anzahl der Elemente
Original:
returns the number of elements
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(öffentliche Elementfunktion) [edit]