Maestro questions

• How to invoke a class's default constructor whose one is provided by a ctor with all default paramters?
• Is modifying an object more than once in an expression through its name and through its reference well-defined?
• Why doesn't std::extent work on references to arrays like operator sizeof?
• C++ primer 5th ed. function template overloading
• Can a non-throwing function pointer point to a throwing-function?
• Why doesn't my forward_ function work for rvalues?
• How template explicit instantiation works and when?
• Is it possible to use reference type alias with pointer operator to declare a reference to pointer?
• If my class is a literal class then is it redundant to declare an object of my class as constexpr?
• Why is swap called by std::sort only if my container has more than 32 elements?

Maestro answers