Summary  
This chapter explores patterns for creating and managing immutable data structures, ensuring that objects cannot be changed after creation to promote predictable behavior and easier reasoning about state.  

General domain of usage  
Functional programming

Master the functional programming tools and patterns available in modern C++. Learn to use lambdas, std::function, callable objects, predicates, and higher-order utilities to write expressive, reusable, and efficient code with the STL.

Explore the basics of functional programming in C++ and the building blocks for functional utilities.

Apply functional utilities with STL algorithms and predicates for expressive code.

Delve into advanced functional programming techniques and patterns in C++.

Apply functional programming tools to solve real-world problems using the STL.

Explore idiomatic patterns and best practices for functional programming in modern C++.

Immutability Patterns

Immutability Patterns