std:: tuple_size <std::array>
|
Defined in header
<array>
|
||
|
template
<
class
T,
std::
size_t
N
>
struct
tuple_size
<
std::
array
<
T, N
>
>
:
|
(since C++11) | |
Provides access to the number of elements in an std::array as a compile-time constant expression.
Helper variable template
|
template
<
class
T
>
constexpr std:: size_t tuple_size_v = tuple_size < T > :: value ; |
(since C++17) | |
Inherited from std:: integral_constant
Member constants
|
value
[static]
|
N
, the number of elements in the array
(public static member constant) |
Member functions
|
operator std::size_t
|
converts the object to
std::
size_t
, returns
value
(public member function) |
|
operator()
(C++14)
|
returns
value
(public member function) |
Member types
| Type | Definition |
value_type
|
std:: size_t |
type
|
std:: integral_constant < std:: size_t , value > |
Example
#include <array> int main() { auto arr = std::to_array("ABBA"); static_assert(std::tuple_size<decltype(arr)>{} == 5); }
See also
| Structured binding (C++17) | binds the specified names to sub-objects or tuple elements of the initializer |
|
(C++11)
|
obtains the number of elements of a tuple-like type
(class template) |
|
(C++11)
|
obtains the size of
a
|
|
(C++11)
|
obtains the size of a
pair
(class template specialization) |
|
obtains the size of a
std::ranges::subrange
(class template specialization) |