Summary  
This chapter explains how to represent and propagate errors as values using types like Either or Result, and how to compose and transform these error-aware computations with functional combinators instead of throwing exceptions.

General domain of usage  
Backend application and API development

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++.

Functional Error Handling

Functional Error Handling