d2533189de
Improve doc of some methods that take ranges Some methods that were taking some range in parameter were a bit inconsistent / unclear in the panic documentation. Here is the recap: - Replaced "start/end point" by "start/end bound" to be coherent with [`RangeBounds`](https://doc.rust-lang.org/stable/std/ops/trait.RangeBounds.html) naming (it's also easier to understand I think) - Previously, it was written "_[...] or if the end point is greater than the length of [...]_", but this is not entirely true! Actually, you can have a start bound that is greater than the length, with an end bound that is unbounded and it will also panic. Therefore I think that "_[...] one of the range bound is bounded and greater than the length of [...]_" is better! - `String` methods weren't mentionning that the method panics if `start_bound > end_bound` but it actually does! It uses `slice::range` which panics when `start > end`. (https://doc.rust-lang.org/stable/src/alloc/string.rs.html#1932-1934, https://doc.rust-lang.org/stable/src/core/slice/index.rs.html#835-837). You can also test it with: ```rs struct MyRange; impl std::ops::RangeBounds<usize> for MyRange { fn start_bound(&self) -> std::ops::Bound<&usize> { std::ops::Bound::Included(&3usize) } fn end_bound(&self) -> std::ops::Bound<&usize> { std::ops::Bound::Included(&1usize) } } fn main() { let mut s = String::from("I love Rust!"); s.drain(MyRange); // panics! } ``` |
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