It's sort of like a cleaner approach to a C# SelectMany where you return either an empty array or a single-item array? C++ keeps getting more stuff but it's cl

It's sort of like a cleaner approach to a C# SelectMany where you return either an empty array or a single-item array? C++ keeps getting more stuff but it's clear a lot of thought goes into these additions. I think a "living" language has proven better over time (C# evolved heavily and borrowed from other languages, C++ does as well, maybe lately concepts from functional and Rust?) Go might be the big exception that evolves super-slowly.