I'm not a C++ guy (aside from the odd patch to upstream projects) so maybe I'm missing something but are you talking about structured bindings? AFAICS those were added in C++17, so Rust had them for much longer. Besides, I would argue Python is the real inspiration for C++ here.

In Rust "tuple unpacking" is really just a special case of pattern matching, which is a far more powerful concept and was actually taken from OCaml.