cbegin
Retrieves a const iterator to the first element in a specified container.
template<class Container>
auto cbegin(const Container& cont)
-> decltype(cont.begin());
Parameters
- cont
A container or initializer_list.
Return Value
A constant cont.begin().
Remarks
This function works with all STL containers and with initializer_list.
You can use this member function in place of the begin() template function to guarantee that the return value is const_iterator. Typically, it's used in conjunction with the auto type deduction keyword, as shown in the following example. In the example, consider Container to be a modifiable (non-const) container or initializer_list of any kind that supports begin() and cbegin().
auto i1 = Container.begin(); // i1 is Container<T>::iterator
auto i2 = Container.cbegin(); // i2 is Container<T>::const_iterator
Requirements
Header: <iterator>
Namespace: std