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Showing content from https://en.cppreference.com/w/cpp/language/../string/../utility/../language/../types/is_array.html below:

std::is_array - cppreference.com

template< class T > struct is_array;

(since C++11)

std::is_array is a UnaryTypeTrait.

Checks whether T is an array type. Provides the member constant value which is equal to true, if T is an array type. Otherwise, value is equal to false.

If the program adds specializations for std::is_array or std::is_array_v, the behavior is undefined.

[edit] Template parameters [edit] Helper variable template

template< class T > constexpr bool is_array_v = is_array<T>::value;

(since C++17) Inherited from std::integral_constant Member constants true if T is an array type, false otherwise
(public static member constant) Member functions converts the object to bool, returns value
(public member function) returns value
(public member function) Member types [edit] Possible implementation [edit] Example

#include <array>
#include <type_traits>
 
class A {};
static_assert(std::is_array<A>::value == false);
static_assert(std::is_array<A[]>::value == true);
static_assert(std::is_array<A[3]>::value == true);
 
static_assert(std::is_array<float>::value == false);
static_assert(std::is_array<int>::value == false);
static_assert(std::is_array<int[]>::value == true);
static_assert(std::is_array<int[3]>::value == true);
static_assert(std::is_array<std::array<int, 3>>::value == false);
 
int main() {}

[edit] See also checks if a type is an array type of known bound
(class template) [edit] checks if a type is an array type of unknown bound
(class template) [edit] obtains the number of dimensions of an array type
(class template) [edit] obtains the size of an array type along a specified dimension
(class template) [edit] removes one extent from the given array type
(class template) [edit] removes all extents from the given array type
(class template) [edit]

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