I think you're misinterpreting OP's excitement here. The technique isn't novel but the ergonomics are.

> you can implement this pattern ergonomically in C++,

lmao

> I think you're misinterpreting OP's excitement here. The technique isn't novel but the ergonomics are.

This, of course, but I also consciously made the decision to write for an audience less familiar with the language and concepts being discussed. That excitement can translate to engaging a less disgruntled and more curious reader than the OP.

While C++ isn't without warts, and WG21 does indeed a good job adding a few more, many time people aren't able to do ergonomic stuff in C++, because they insist in using it like C with Classes.