[sesm]

Rust was created as a C++ replacement, borrows the 'zero cost abstractions' motto from C++, relies on RAII for resource management like C++ (not many languages do it), has the same approach to concurrency (in-place mutation guarded by locks), uses the codegen backend that was created for C++. It's mostly a C++ subset with more guardrails.

Edit: RAII

[zozbot234]

It's nowhere near a C++ subset. The way it works under the hood is quite different, and even trying to add some of the underlying mechanisms to C++ (such as what they call "trivially relocatable types", or "destructing moves") has been quite difficult.

[sesm]

Actually, we already discussed Rust move semantics on this website some time ago: https://news.ycombinator.com/item?id=43059293

And again, the best way to explain this is by comparison to C++