add_volatile Class


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Makes volatile type from the specified type.

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


The type to modify.

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.

#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  

Header: <type_traits>

Namespace: std

remove_volatile Class