public member function
<set>
const_iterator cbegin() const noexcept;
Return const_iterator to beginning
Returns a const_iterator pointing to the first element in the container.
All iterators in multiset containers are constant iterators (including both const_iterator and iterator member types). These cannot be used to modify the contents they point to, but can be increased and decreased normally (unless they are themselves also const).
If the container is empty, the returned iterator value shall not be dereferenced.
Return Value
A const_iterator to the beginning of the sequence.
Member type const_iterator is a bidirectional iterator type that points to const elements.
Example
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// multiset::cbegin/cend
#include <iostream>
#include <set>
int main ()
{
std::multiset<int> mymultiset = {10,20,30,20,10};
std::cout << "mymultiset contains:";
for (auto it=mymultiset.cbegin(); it != mymultiset.cend(); ++it)
std::cout << ' ' << *it;
std::cout << '\n';
return 0;
}
|
Output:
mymultiset contains: 10 10 20 20 30
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Iterator validity
No changes.
Data races
The container is accessed.
Concurrently accessing the elements of a multiset 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
- multiset::begin
- Return iterator to beginning (public member function
)
- multiset::cend
- Return const_iterator to end (public member function
)
- multiset::crbegin
- Return const_reverse_iterator to reverse beginning (public member function
)