dani questions

• What happens if a object to which a smart pointer is pointing to commits suicide?
• Weird behaviour of QToolTip when it should follow the mouse who is over a QGraphicsItem
• Checking that a template type T is part of a variadic parameter pack in C++17
• How do i use add_subdirectory() after ExternalProject_Add() has finished downloading?
• 'non-static reference member, can't use default assignment operator'
• Will a custom allocator improve performance if many vector<T> s get constructed and destroyed?
• How to avoid loops when iterating over adjacent elements of a vector
• Howto use a fold expression with a specific type?
• How to generate a massive amount of high quality Random Numbers?
• Is it possible to get the first type of a parameter pack in a one-liner?

dani answers