<type_traits>

class template
<type_traits>

std::add_pointer

template <class T> struct add_pointer;
Add pointer
Obtains the pointer type that points to T.

The transformed type is aliased as member type add_pointer::type.

If T is a reference type, this is remove_reference<T>::type*, otherwise it is T*.

Template parameters

T
A type.

Member types

member typedefinition
typeIf T is a reference type: remove_reference<T>::type*
Otherwise: T*

Example

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// add_pointer #include <iostream> #include <type_traits> typedef std::add_pointer<int>::type A; // int* typedef std::add_pointer<const int>::type B; // const int* typedef std::add_pointer<int&>::type C; // int* typedef std::add_pointer<int*>::type D; // int** typedef std::add_pointer<int(int)>::type E; // int(*)(int) typedef int X[3]; int main() { std::cout << std::boolalpha; std::cout << "typedefs of int*:" << std::endl; std::cout << "A: " << std::is_same<int*,A>::value << std::endl; std::cout << "B: " << std::is_same<int*,B>::value << std::endl; std::cout << "C: " << std::is_same<int*,C>::value << std::endl; std::cout << "D: " << std::is_same<int*,D>::value << std::endl; std::cout << "E: " << std::is_same<int*,E>::value << std::endl; return 0; }

Output:
typedefs of int*: A: true B: false C: true D: false E: false 


See also