Re:C++17 Library Papers for Cologne
by static_noise on Sunday February 15, 2015 @04:21AM
(#9052139)
Smart pointers are pretty easy to use. They basically just delete the object they are pointing to if they go out of scope.
You never have to worry about when and where to write "delete" again. What if an exception occurs in your code? No worry, the smart pointer deletes the object.
If you use a "shared pointer" you can duplicate the pointerand use it in other functions and classes - the deletion happens when the last pointer object goes out of scope.
Example:
{
auto a = shared_ptr<T>( new T() );
} // Now it gets deleted.
Another one:
{
auto a = shared_ptr<T>( new T() );
some_object.the_shared_ptr = a;
another_object.the_shared_ptr = a;
} // Not yet, wait for the copies to get deleted.
You never have to worry about when and where to write "delete" again. What if an exception occurs in your code? No worry, the smart pointer deletes the object.
If you use a "shared pointer" you can duplicate the pointerand use it in other functions and classes - the deletion happens when the last pointer object goes out of scope.
Example:
{
Another one:{