CppNorth, The Canadian C++ Conference 2025

In this talk, we will explore the power of C++20 ranges and how custom views can simplify complex data transformations and improve code expressiveness. By creating reusable, lazy-evaluated views that operate on ranges, developers can avoid unnecessary intermediate containers and simplify complex data transformations. While standard views like std::views::transform and std::views::filter offer powerful tools for basic operations, custom views provide additional flexibility, allowing developers to create highly specialized transformations and handle more complex, state-dependent logic.  Through real-world examples, we will demonstrate how custom views enhance performance and maintainability, showcasing how they can streamline everything from basic filtering to complex, state-dependent transformations in modern C++ applications.