It’s been 20 years since the STL was standardized, and all I want to do is pass a vector to sort. Is that too much to ask? Nope. With C++20, you will finally be able to do this: https://ericniebler.com/2018/12/05/standard-ranges/

std::vector< int > v = // ...

std::ranges::sort( v ); // Hurray!

Pillars: https://github.com/ericniebler/range-v3

Views - Views are composable adaptations of ranges where the adaptation happens lazily as the view is iterated.

Actions - an action is an eager application of an algorithm to a container that mutates the container in-place and returns it for further processing.

Algorithms

range adaptors : https://ericniebler.com/2018/12/05/standard-ranges/

Also The true power of ranges lies in the ability to create pipelines that transform ranges on the fly https://ericniebler.com/2018/12/05/standard-ranges/

but these may be out of date - verify in product

Views and actions use the pipe syntax (e.g., rng | adapt1 | adapt2 | ...) so your code is terse and readable from left to right.

Range algorithms available (casey list):