Explore functional programming concepts in C++ through this comprehensive conference talk. Delve into expressing functional ideas idiomatically in modern C++, focusing on immutability beyond const, concurrency beyond threading and locks, and viewing functions as transformations and units of composition. Learn about shared and persistent data structures, practical examples, and the Observer approach. Examine topics such as void pointers, mutability, consistency, isolation, date classes, constant time operations, and garbage collection. Gain insights into solving common programming problems using functional paradigms and discover how to apply these principles effectively in C++ development.