Modules, coroutines, concepts, and ranges, oh my. Here comes C++ 20. The big four new features are getting all the buzz, but what about the smaller features? 

C++20: The Unspoken Features

by Michele Caini

From the article:

What's new in C++ besides the big four? A lot of things. We certainly won't be able to see them all in one post. Among the most interesting (at least from my point of view) are the following:

• Designated initializers
• Spaceship operator
• Extended range-based for statement
• Pack expansions in lambda init-capture
• Template parameter lists on lambdas
• String literals as template parameters
• consteval and constinit keywords
• Constexpr containers
• Constexpr virtual functions