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add_pointer Class

Makes a pointer-to-type from a specified type.

template<class Ty>
    struct add_pointer;

template<class T>
using add_pointer_t = typename add_pointer<T>::type;

Ty

The type to modify.

The member typedef type names the same type as remove_reference<T>::type*.

Because it is invalid to make a pointer from a reference, add_pointer removes the reference, if any, from the specified type before it makes a pointer-to-type. Consequently, you can use a type with add_pointer without being concerned about whether the type is a reference.

The following example demonstrates that add_pointer of a type is the same as a pointer to that type.

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

Header: <type_traits>

Namespace: std

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