Optimizes out copy- and move-constructors, resulting in zero-copy pass-by-value semantics. Explanation Under

A class template defines a family of classes. Syntax

Order of evaluation of the operands of almost all C++ operators (including the order of evaluation of function arguments in a function-call expression and the order of evaluation

Initializes an object from another object. Syntax

Safely converts pointers and references to classes up, down, and sideways along the inheritance hierarchy. Syntax

A constructor that is not declared with the specifier explicit

A qualified name is a name that appears on the right hand side of the scope resolution operator :: (see also qualified identifiers). A qualified name may

Queries the number of elements in a parameter pack

A copy constructor of class T is a non-template constructor whose first parameter is T&, const T&, volatile T&

Declarations introduce (or re-introduce) names into the C++ program. Each kind of entity is declared differently.