Copy and Move Semantics

Things to understand

1. lvalue, xvalue, prvalue
   https://en.cppreference.com/w/cpp/language/value_category
   on the same note, std::move : https://en.cppreference.com/w/cpp/utility/move

2. implicit declaration/deletion of copy and move constructors
   https://en.cppreference.com/w/cpp/language/copy_constructor
   https://en.cppreference.com/w/cpp/language/move_constructor
   https://en.cppreference.com/w/cpp/language/overload_resolution

3. copy elision https://en.cppreference.com/w/cpp/language/copy_elision

4. MUST READ. std::move on const lvalue. ref

What I learned after wasting 2 days on same thing

To summarise:
A const valued argument can not be passed to a ‘non-const’ valued parameterised method

Please refer to the code examples which also include comments for better understanding:

• rvalue and lvalue
• move semantics 1
• move semantic 2

This image is really important:

Ref: https://www.nextptr.com/tutorial/ta1211389378/beware-of-using-stdmove-on-a-const-lvalue

Since Passing by reference is like passing a * const , same rules are also applicable to pointers

Literals are converted to equivalent primitives
String literals, can be converted to const char* (recommended) or char * (deprecated)

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