template< class T >
struct is_bounded_array;
std::is_bounded_array is a UnaryTypeTrait.
Checks whether T is an array type of known bound. Provides the member constant value which is equal to true, if T is an array type of known bound. Otherwise, value is equal to false.
If the program adds specializations for std::is_bounded_array or std::is_bounded_array_v, the behavior is undefined.
template< class T >
constexpr bool is_bounded_array_v = is_bounded_array<T>::value;
T is an array type of known bound, false otherwise
#include <iostream>
#include <type_traits>
#define OUT(...) std::cout << #__VA_ARGS__ << " : " << __VA_ARGS__ << '\n'
class A {};
int main()
{
std::cout << std::boolalpha;
OUT(std::is_bounded_array_v<A>);
OUT(std::is_bounded_array_v<A[]>);
OUT(std::is_bounded_array_v<A[3]>);
OUT(std::is_bounded_array_v<float>);
OUT(std::is_bounded_array_v<int>);
OUT(std::is_bounded_array_v<int[]>);
OUT(std::is_bounded_array_v<int[3]>);
}
Output:
std::is_bounded_array_v<A> : false std::is_bounded_array_v<A[]> : false std::is_bounded_array_v<A[3]> : true std::is_bounded_array_v<float> : false std::is_bounded_array_v<int> : false std::is_bounded_array_v<int[]> : false std::is_bounded_array_v<int[3]> : true[edit] See also checks if a type is an array type
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