Let's say I have several objects declared locally that I want to iterate over using range-based for syntax. This seems to work well, however, it appears that to put the local objects into the initializer_list, a copy is performed. This is bad news for objects like std::shared_ptr for which (as...
Here is a smart pointer: std::shared_ptr<char> p(new char[size]) which represents array filled with raw binary file content. After (and only after) the whole array is copied from file to RAM, I can parse it, and during this I retrieve some header information (a few first dwords). Then actual data follows.
Try out this following code:You'll see a compile error:Is there any way to workaround this ambiguity? Perhaps with SFINAE?
There are classes that I write (often as part of boost::asio) whose objects depend on being wrapped in a shared_ptr because they use shared_from_this(). Is there a way to prevent an object from being compiled if it's not instantiated in a shared_ptr?
I had 2 questions regarding the std::shared_ptr control block:(1) Regarding size: How can I programatically find the exact size of the control block for a std::shared_ptr?
Coding stuff after taking the hint from my previous question's answer, I ran into an issue with overloading Scene::addObject.
I have a question, please go through the following simple C++ program,Output:How does sptr1 and sptr3 objects know reference count is incremented as it prints 4.
I'm implementing a polymorphic type (call it A) that I want to have managed exclusively via std::shared_ptr. To allow using shared_from_this in the constructor of derived classes, A is allocated using new and then initializes a member std::shared_ptr to itself to manage its lifetime automatically. To help enforce this, I've...
Both as int, why 0 but 1 can be converted to std::shared_ptr<T>?How the disability of conversion from 1 to std::shared_ptr<T> be checked when compiling?
I am reading C++ Primer and find these kinda confusing:The reset member is often used together with unique to control changes to the object shared among several shared_ptrs. Before changing the underlying object, we check whether we’re the only user. If not, we make a new copy before making the...