rank Class

Gets number of array dimensions.

Syntax

template <class Ty>
struct rank;

Parameters

Ty
The type to query.

Remarks

The type query holds the value of the number of dimensions of the array type Ty, or 0 if Ty is not an array type.

Example

// std__type_traits__rank.cpp
// compile with: /EHsc
#include <type_traits>
#include <iostream>

int main()
    {
    std::cout << "rank<int> == "
        << std::rank<int>::value << std::endl;
    std::cout << "rank<int[5]> == "
        << std::rank<int[5]>::value << std::endl;
    std::cout << "rank<int[5][10]> == "
        << std::rank<int[5][10]>::value << std::endl;

    return (0);
    }

rank<int> == 0
rank<int[5]> == 1
rank<int[5][10]> == 2

Requirements

Header: <type_traits>

Namespace: std

See also

<type_traits>
extent Class