std::unique_ptr<T,Deleter>::release
From cppreference.com
< cpp | memory | unique ptr
| pointer release() noexcept; |
(since C++11) | |
Releases the ownership of the managed object if any. get() returns nullptr after the call.
Parameters
(none)
Return value
Pointer to the managed object or nullptr if there was no managed object, i.e. the value which would be returned by get() before the call.
Example
Run this code
#include <memory> #include <iostream> #include <cassert> struct Foo { Foo() { std::cout << "Foo\n"; } ~Foo() { std::cout << "~Foo\n"; } }; int main() { std::cout << "Creating new Foo...\n"; std::unique_ptr<Foo> up(new Foo()); std::cout << "About to release Foo...\n"; Foo* fp = up.release(); assert (up.get() == nullptr); std::cout << "Foo is no longer owned by unique_ptr...\n"; delete fp; }
Output:
Creating new Foo... Foo About to release Foo... Foo is no longer owned by unique_ptr... ~Foo
See also
| returns a pointer to the managed object (public member function) | |
| replaces the managed object (public member function) |