For arrays, this problem is not computable at compile time, hence the sarcastic remark that, IF THE ABOVE DEFINITION IS TAKEN AT FACE VALUE, Rust must have solved the halting problem. Downvoters are so dumb here.
Why are you shouting? That's what twits do. You don't want to be a twit, do you? Read the site guidelines, emphasis is done with italicized text marked up with an * at the beginning and another * at the end.
But to respond to the topic at hand: Are you familiar with the distinction between sound (what Rust aims for) and complete analyses?
https://stackoverflow.com/questions/28389371/why-does-rust-c...
> Rust's big step function was to offer memory safety at compile time through the use of static analysis borrowed and grown out of prior efforts such as Cyclone, a research programming language formulated as a safe subset of C.
It is absolutely true that memory safety is offered at compile time in Rust which is a novel thing. You then pivoted this to start talking about bounds safety of arrays which is a strawman interpretation of what was written.
"Memory safety—the property that makes software devoid of weaknesses such as buffer overflows, double-frees, and similar issues—has been a popular topic in software communities over the past decade"
And the buffer overflows are not detected statically except for the cases when the compiler can prove them. And Rust proponents keep ignoring the topic of this subthread, which is memory safety by static analysis.
RefCell enforces memory safety too by doing the lifetime enforcement at runtime by using UnsafeCell to provide certain semantics. But the compiler ensures that the RefCell itself still has correct lifetimes and is used correctly, resulting in a compile time guarantee that the code that’s run is memory safe.
https://blog.adacore.com/memory-safety-in-rust
Notice that in-bounds indexing is included, same as in the definition from this submission that I quoted at you.