C++20 is an important version of the C++ language, officially released in December 2020, introducing a series of new features and improvements aimed at enhancing development efficiency, code readability, and performance.
Language Features
• Modules: Modules are a significant feature of C++20, designed to address many issues with header files, such as slow compilation speeds and namespace pollution. Modules provide a more efficient and clearer way to organize and manage code.
• Concepts: Concepts are used to constrain template parameters, making template programming more concise, intuitive, and safe. They can significantly enhance the readability and debugging experience of template code.
• Coroutines: Coroutines allow functions to suspend execution and resume at a later point without blocking the thread. This feature is very useful for implementing high-performance asynchronous I/O operations, event-driven programming, and complex control flows.
• Three-way Comparison Operator (<=>): Also known as the