std::inplace_vector<T,N>::front
From cppreference.com
constexpr reference front();
|
(1) | (since C++26) |
constexpr const_reference front() const;
|
(2) | (since C++26) |
Returns a reference to the first element in the container.
If empty() is true:
- If the implementation is hardened, a contract violation occurs.
- If the implementation is not hardened, the behavior is undefined.
Return value
Reference to the first element.
Complexity
Constant.
Notes
For a container c, the expression c.front() is equivalent to *c.begin().
Example
The following code uses front to display the first element of a std::inplace_vector<char, 4>:
Run this code
#include <cassert>
#include <inplace_vector>
int main()
{
std::inplace_vector<char, 4> letters{'a', 'b', 'c', 'd'};
assert(letters.front() == 'a');
}
See also
| access the last element (public member function) | |
| returns a reverse iterator to the end (public member function) | |
| returns an iterator to the beginning (public member function) | |
| direct access to the underlying contiguous storage (public member function) |
