C++20 is now feature-complete as per the announcement made by International Organisation for Standardisation (ISO). The specifications will be formally completed when the ISO team meets next somewhere in July 2019.
The new concepts and modules of C++20 will simplify the use of C++ when developers get them. The upcoming new version of C++ will help developers get over the teething pains that they have been facing for too long now. The modules that will be introduced in C++ will help simplify the efforts of programmers.
Modules introduced in C++ are designed to help developers move away from the complex, error-prone use of preprocessing of program composition. These concepts will let developers specify a template’s requirement on arguments.
The new provisions cater to the requirement to use templates to support generic programming by making their interfaces much more precise. C++20, when released will offer a much better code quality and templates and will be comparatively easy to use. This new version will introduce Coroutines which are basically program components that generalise subroutines for using in nonpreemptive multi-tasking.
Apart from these, here are other new features that will be introduced in C++20:
• C++20 synchronisation library brings barriers, latches and other modifications to C++’s low level concurrent programming support.
• Various compile-time computation improvements.
• Contracts, specifying pre and post conditions and assertions for functions.
• Expansion statements, enabling the compile-time repetition of a statement for each element.
• Monadic operations for std::optional.
Coroutines are suited for tasks like event loops, iterators, coroutines enabled by extensions that include event loops and iterators. The formal adoption of the new version is expected to happen by 2020. Many of these features are already in use in experimental production versions.