std::array<T,N>:: front
|
reference front
(
)
;
|
(1) |
(since C++11)
(constexpr since C++17) |
|
const_reference front
(
)
const
;
|
(2) |
(since C++11)
(constexpr since C++14) |
Returns a reference to the first element in the container.
Calling
front
on an empty container causes undefined behavior.
Parameters
(none)
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::
array
<
char
,
4
>
:
#include <cassert> #include <array> int main() { std::array<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) |