is-pointer-class.md

description	title	ms.date	f1_keywords	helpviewer_keywords	ms.assetid
Learn more about: is_pointer Class	is_pointer Class	11/04/2016	type_traits/std::is_pointer	is_pointer class is_pointer	44e0a403-7241-4e0a-8922-32877bcb9a4c

is_pointer Class

Tests if type is a pointer.

Syntax

template <class Ty>
struct is_pointer;

Parameters

Ty
The type to query.

Remarks

An instance of the type predicate holds true if the type Ty is a pointer to void, a pointer to an object, or a pointer to a function, or a cv-qualified form of one of them, otherwise it holds false. Note that is_pointer holds false if Ty is a pointer to member or a pointer to member function.

Example

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

struct trivial
    {
    int val;
    };

int main()
    {
    std::cout << "is_pointer<trivial> == " << std::boolalpha
        << std::is_pointer<trivial>::value << std::endl;
    std::cout << "is_pointer<int trivial::*> == " << std::boolalpha
        << std::is_pointer<int trivial::*>::value << std::endl;
    std::cout << "is_pointer<trivial *> == " << std::boolalpha
        << std::is_pointer<trivial *>::value << std::endl;
    std::cout << "is_pointer<int> == " << std::boolalpha
        << std::is_pointer<int>::value << std::endl;
    std::cout << "is_pointer<int *> == " << std::boolalpha
        << std::is_pointer<int *>::value << std::endl;

    return (0);
    }

is_pointer<trivial> == false
is_pointer<int trivial::*> == false
is_pointer<trivial *> == true
is_pointer<int> == false
is_pointer<int *> == true

Requirements

Header: <type_traits>

Namespace: std

See also

<type_traits>
is_member_pointer Class
is_reference Class