add-const-class.md

description	title	ms.date	f1_keywords	helpviewer_keywords	ms.assetid
Learn more about: add_const Class	add_const Class	11/04/2016	type_traits/std::add_const	add_const class add_const	1262a1eb-8c9c-4dd6-9f43-88ba280182f1

add_const Class

Makes const type from type.

Syntax

template <class Ty>
struct add_const;

Parameters

Ty
The type to modify.

Remarks

An instance of the type modifier holds a modified-type that is Ty if Ty is a reference, a function, or a const-qualified type, otherwise const Ty.

Example

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

int main()
{
    std::add_const<int>::type *p = (const int *)0;

    p = p;  // to quiet "unused" warning
    std::cout << "add_const<int> == "
        << typeid(*p).name() << std::endl;

    return (0);
}

add_const<int> == int

Requirements

Header: <type_traits>

Namespace: std

See also

<type_traits>
remove_const Class