What is the copy-and-swap idiom? lists copy-and-swap as a better alternative to self-assignment check, being simpler and providing stronger exception guarantees. Performance aside, are there any ...

I came across this table describing how the C++ compiler implicitly declares special member functions depending on which ones the user has explicitly declared: Source: Howard Hinnant - How I Declare ...

I know this may be obvious to many, but please explain it to me: struct MyFoo { MyFoo(int& arg) : ref(arg) {} int& ref; MyFoo& operator= (MyFoo&& other) = default; ...

A relatively same question is asked before, but the code snippet is different, which I believe makes this question unique. Does the compiler generate the move operations in the following scenario? ...

I was trying to implement an emplace_back method for a statically-sized array (for fun). I came across the problem of whether I should use placement-new or move assignment for this emplace back method....

Somehow in one of or more of my loops are overrunning my buffer but I can't catch it. It's either that or somehow my capacity or size is at 0 when it shouldn't be but either way I can't find the issue ...

In an answer to this question, under the label: "Why does that work?" , it was noted that: Now, if other is being initialized with an rvalue, it will be move-constructed. Perfect. In the ...

If there is function with the following signature: std::vector<std::vector<std::string>> some_func(); And its assigned to a variable of the same type: std::vector<std::vector<std::...

What is the automatically generated move assignment operator for a class Number that contains only one attribute of type std::shared_ptr<Vertex>? #include <iostream> #include <memory>...

A simple question but I can not find the set of rules that proves that the behavior of the following code example is correct. It seems here that only strDerived is moved from b, but strBase is copied? ...

I made some tests in GCC, Clang and MSVC and found out that emplace_back never calls an assignment operator on the contained class. It only calls the copy or move constructor when reallocation takes ...

I recently realized (pretty late in fact) that it's important to have move constructors marked as noexcept, so that std containers are allowed to avoid copying. What puzzles me is why if I do an erase(...

I'm new to C++ and dont know why this is happening and how to fix it. Here's some snippets of the code: header file: class Dictionary{ private: string filename; const ...

The following code violates AUTOSAR C++ rule 6-2-1: Move and copy assignment operators shall either move or respectively copy base classes and data members of a class, without any side effects. Move ...

For move construction: After the move, other is guaranteed to be empty(). 1 For move assignment, the oft-quoted: other is in a valid but unspecified state afterwards. 2 Why is the state of other ...