add_volatile Class

2018-01-02

The latest version of this topic can be found at add_volatile Class.

Makes volatile type from the specified type.

Syntax

template <class Ty>  
struct add_volatile;  
 
template <class T>using add_volatile_t = typename add_volatile<T>::type;

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 volatile-qualified type, otherwise volatile Ty.

Example

#include <type_traits>   
#include <iostream>   
  
int main()   
    {   
    std::add_volatile_t<int> *p = (volatile int *)0;   
  
    p = p;  // to quiet "unused" warning   
    std::cout << "add_volatile<int> == "   
        << typeid(*p).name() << std::endl;   
  
    return (0);   
    }

add_volatile<int> == int

Requirements

Header: <type_traits>

Namespace: std

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