anthonycalandra/modern-cpp-features

This repository is a cheat sheet of language and library features introduced in modern versions of C++, specifically C++11, C++14, C++17, C++20, and C++23. C++ is one of the older and more widely used programming languages, and over the past decade the language committee has steadily added new syntax and standard-library tools that change how idiomatic C++ code looks. Following all of those changes by reading the formal standards is impractical for most people, so this project collects the highlights into one long, browsable page with short examples. The README is structured as nested checklists, one per standard version. For each version there is a list of "new language features" (things that change syntax, such as lambdas, move semantics, structured bindings, concepts, coroutines, three-way comparison, deducing this, and consteval if) and a list of "new library features" (additions to the C++ standard library, such as smart pointers, std::chrono, std::optional, std::variant, std::filesystem, std::span, std::expected, the stacktrace library, and many more). Each item links to a section further down where the feature is explained in a paragraph or two and shown with a code snippet. You would use it as a quick reference whenever you encounter unfamiliar syntax in someone else's C++ code, or when moving from an older standard to a newer one and want a single place to scan for what is now available without reading the standards document. The repository itself is just Markdown documentation, there is no compiled binary, no installation, and no runtime dependency; you read it on GitHub or clone it for offline browsing. The full README is longer than what was provided.