public member function
<map>

std::map::cend

const_iterator cend() const noexcept;
Return const_iterator to end
Returns a const_iterator pointing to the past-the-end element in the container.

A const_iterator is an iterator that points to const content. This iterator can be increased and decreased (unless it is itself also const), just like the iterator returned by map::end, but it cannot be used to modify the contents it points to, even if the map object is not itself const.

If the container is empty, this function returns the same as map::cbegin.

The value returned shall not be dereferenced.

Parameters

none

Return Value

A const_iterator to the element past the end of the sequence.

Member type const_iterator is a bidirectional iterator type that points to const elements.

Example

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// map::cbegin/cend
#include <iostream>
#include <map>

int main ()
{
  std::map<char,int> mymap;

  mymap['b'] = 100;
  mymap['a'] = 200;
  mymap['c'] = 300;

  // print content:
  std::cout << "mymap contains:";
  for (auto it = mymap.cbegin(); it != mymap.cend(); ++it)
    std::cout << " [" << (*it).first << ':' << (*it).second << ']';
  std::cout << '\n';

  return 0;
}


Output:
mymap contains: [a:200] [b:100] [c:300]

Complexity

Constant.

Iterator validity

No changes.

Data races

The container is accessed.
No contained elements are accessed by the call, but the iterator returned can be used to access them. Concurrently accessing or modifying different elements is safe.

Exception safety

No-throw guarantee: this member function never throws exceptions.
The copy construction or assignment of the returned iterator is also guaranteed to never throw.

See also

map::end
Return iterator to end (public member function )
map::cbegin
Return const_iterator to beginning (public member function )

C++