is-array-class.md

description	title	ms.date	f1_keywords	helpviewer_keywords	ms.assetid
Learn more about: is_array Class	is_array Class	11/04/2016	type_traits/std::is_array	is_array class is_array	61fb2201-8de3-4746-9721-617f02df170f

is_array Class

Tests if type is array.

Syntax

template <class Ty>
struct is_array;

Parameters

Ty
The type to query.

Remarks

An instance of the type predicate holds true if the type Ty is an array type, otherwise it holds false.

Example

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

struct trivial
    {
    int val;
    };

int main()
    {
    std::cout << "is_array<trivial> == " << std::boolalpha
        << std::is_array<trivial>::value << std::endl;
    std::cout << "is_array<int> == " << std::boolalpha
        << std::is_array<int>::value << std::endl;
    std::cout << "is_array<int[5]> == " << std::boolalpha
        << std::is_array<int[5]>::value << std::endl;

    return (0);
    }

is_array<trivial> == false
is_array<int> == false
is_array<int[5]> == true

Requirements

Header: <type_traits>

Namespace: std

See also

<type_traits>
extent Class
rank Class