C++ memory
  http://www.cplusplus.com/reference/memory/

C++ smart pointers -- p.392
  https://en.cppreference.com/w/cpp/memory/unique_ptr
    one reference
  https://en.cppreference.com/w/cpp/memory/shared_ptr
    reference counts -- decrement in destructors, adjust with assignment
  http://www.cplusplus.com/reference/memory/weak_ptr/
    require a bit of help      
  first mention of "move semantics"
References in C -- p. 428
  p. 430 second mention of "move semantics"
  R-value reference
  Example!

move semantics

   https://en.wikipedia.org/wiki/Reference_(C%2B%2B)
   https://isocpp.org/wiki/faq/references

C++ smart pointers -- p. 392
References in C++  -- p. 427
R-value references -- p. 430

C++ initiation lists

Whew
  https://en.cppreference.com/w/cpp/language/value_category
  glvalue, prvalue, xvalue, lvalue, rvalue
glvalue -- generalized value
prvalue -- pure value
xvalue -- expiring valued
lvalue -- glvalue but not xvalue
rvalue -- prvalue or xvalue
  https://isocpp.org/blog/2016/04/quick-q-what-are-rvalues-lvalues-xvalues-glvalues-and-prvalues


double colon
   vector <int>::iterator v1Iter;
   ::   member function, top-level function, variable with global scope
   C++ has "member functions" not "methods"

http://www.cplusplus.com/reference/vector/vector/



Chapter 8--- smart pointers
   p. 392
   https://en.wikipedia.org/wiki/Reference_(C%2B%2B)


https://docs.microsoft.com/en-us/cpp/cpp/smart-pointers-modern-cpp?view=vs-2017

https://en.cppreference.com/w/cpp/language/value_category

                    expression
          glvalue                rvalue
lvalue               xvalue           prvalue


Set theory
  Expression == glvalue + rvalue
  Expression == lvalue + xvalue + prvalue
  glvalue contains lvalue
  rvalue contains prvalue
  glvalue and rvalue do not intersect
  no two of lvalue, xvalue, prvalue intersect


move semantics
vector

C++ references

   alias     https://en.wikipedia.org/wiki/Reference_(C%2B%2B)
             C++ 1998
	     C++98  (-ansi in gcc) c++03 (corrigendem -- correction)
	     C++11 C++14 C++17 C++20

https://en.cppreference.com/w/cpp/language/value_initialization ( --

C++11 values Rvalue references
   T&& non-const rvalues
       Can be modified after initialized -- move semantics
smart pointers in C++
   std::unique_ptr<type> F()     -- container for raw pointer
       https://en.wikipedia.org/wiki/Smart_pointer#unique_ptr
   guarentees this is the only ptr
   https://en.wikipedia.org/wiki/Smart_pointer#shared_ptr_and_weak_ptr
      reference counting
   std::move

variadic functions


http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2006/n2027.html

ISO C90, ISO C99, ISO C11


Example 9.19


Initialization list...


https://isocpp.org/
https://isocpp.org/wiki/faq
https://isocpp.org/wiki/faq/references

https://isocpp.org/wiki/faq/cpp11-language

https://github.com/AnthonyCalandra/modern-cpp-features

https://isocpp.org/wiki/faq/cpp11
https://isocpp.org/wiki/faq/cpp14


Effective Modern C++:
  std::move doesn't move
  std::forward doesn't forward