6 Implicit Functions
  Constructor (1. Default, 2. copy, 3. move)
  Assignment Operator(4. Copy, 5. move assigment operator)
  6. Destructor
Characteristics of OOPS
  1. Polymorphism
  |- Static(CompileTime)
    |- Templates(Class, Function, Variadic Templates, Template Parameter Pack)
    |- Operator Overloading
  |- Dynamic(Runtime): Virtual Functions
 2. Association: Composition , Aggregation
 3. Generalization = Inheritance
 4. Abstraction
 5. Classes, Objects, Data hiding
 6. Encapsulation
Exception Handling
C++11
  attributes: carries_dependency, depreacated, fallthrough, likely, unlikely, maybe_unused, nodiscard, noreturn, no_unique_address, optimize_for_synchronized
  Constexpr and macros
  decltype / decltype(auto)
  Function Pointer
  Lambda Expression
  lvalue & lvalue reference, rvalue & rvalue reference Copy, Move constructor
  noexcept
  remove_pointer_t
  Pointers(Raw & Smart). unique_ptr, shared_ptr
  Type Triats
C++14
C++17
  Fold Expression
  string_view
C++20
  __has_cpp_attribute
  3 Way Comparator
  Abbreviated Function Template
  Aggregate initialization
  Concept & Contraint
STL
  Associative Containers:
  Unsorted(hashmap, Hashset)
  Sorted(map, set)
  Container Adoptors: Stack, Queue, priority_queue
  Sequence Containers: vector, deque
  Algorithms
  Iterators
  Functors
String
Terms