This exact thing is one feature I like about Perl 6 and (minorly) dislike about Rust.

In P6, 1..10 is exactly the range you'd expect, while ^ is used to exclude either end of the range. For example, 1..^11 is the same as 1..10, as is 0^..^11 (can't say I've ever needed that, but I could see a couple of possible uses).

This also carries over into range syntactic sugar. ^10 is shorthand for 0..^10, and as a result ^@list.elems is a list of valid indices of a list.

I personally find Rust's syntax noisier, but it's a small issue.