get_deleter Function
Get deleter from shared_ptr.
template<class D, class Ty>
D *get_deleter(const shared_ptr<Ty>& sp);
Parameters
D
The type of the deleter.Ty
The type controlled by the shared pointer.Other
The shared pointer.
Remarks
The template function returns a pointer to the deleter of type D that belongs to the shared_ptr Class object sp. If sp has no deleter or if its deleter is not of type D the function returns 0.
Example
// std_tr1__memory__get_deleter.cpp
// compile with: /EHsc
#include <memory>
#include <iostream>
struct base
{
int val;
};
struct deleter
{
void operator()(base *p)
{
delete p;
}
};
int main()
{
std::shared_ptr<base> sp0(new base);
sp0->val = 3;
std::cout << "get_deleter(sp0) != 0 == " << std::boolalpha
<< (std::get_deleter<deleter>(sp0) != 0) << std::endl;
std::shared_ptr<base> sp1(new base, deleter());
sp0->val = 3;
std::cout << "get_deleter(sp1) != 0 == " << std::boolalpha
<< (std::get_deleter<deleter>(sp1) != 0) << std::endl;
return (0);
}
get_deleter(sp0) != 0 == false get_deleter(sp1) != 0 == true
Requirements
Header: <memory>
Namespace: std