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I'm really new to Rust, this is the first thing I've ever actually pushed to github in a rust project, so please double check that it's correct. I noticed that the in-doc example for the string's get() function was referring to get_mut(). Looks like a copy/paste issue.
```rust
fn main() {
let v = String::from("🗻∈🌏");
assert_eq!(Some("🗻"), v.get(0..4));
// indices not on UTF-8 sequence boundaries
assert!(v.get(1..).is_none());
assert!(v.get(..8).is_none());
// out of bounds
assert!(v.get(..42).is_none());
}
```
results in:
```
jhford-work:~/rust/redish $ cat get-example.rs
fn main() {
let v = String::from("🗻∈🌏");
assert_eq!(Some("🗻"), v.get(0..4));
// indices not on UTF-8 sequence boundaries
assert!(v.get(1..).is_none());
assert!(v.get(..8).is_none());
// out of bounds
assert!(v.get(..42).is_none());
}
jhford-work:~/rust/redish $ rustc get-example.rs
jhford-work:~/rust/redish $ ./get-example ; echo $?
0
```
I did not build an entire rust toolchain as I'm not totally sure how to do that.
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We don't want to stabilize them now already. The goal of this set of
commits is just to add inherent methods to the four types. Stabilizing
all of those methods can be done later.
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Many AsciiExt imports have become useless thanks to the inherent ascii
methods added in the last commits. These were removed. In some places, I
fully specified the ascii method being called to enforce usage of the
AsciiExt trait. Note that some imports are not removed but tagged with
a `#[cfg(stage0)]` attribute. This is necessary, because certain ascii
methods are not yet available in stage0. All those imports will be
removed later.
Additionally, failing tests were fixed. The test suite should exit
successfully now.
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This is done in order to deprecate AsciiExt eventually. Note that
this commit contains a bunch of `cfg(stage0)` statements. This is
due to a new compiler feature this commit depends on: the
`slice_u8` lang item. Once this lang item is available in the
stage0 compiler, all those cfg flags (and more) can be removed.
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Add an example of std::str::encode_utf16
Closes #44419
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Add doc example to str::from_boxed_utf8_unchecked
Fixes #44463.
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Closes #44419
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Fixes #44463.
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documentation update to demonstrate mutability
#44467
- demonstrate correct implementation returns `Some`
- demonstrate out of bounds returns `None`
- demonstrate mutability
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Fixes #44427
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This fixes headings reading "Unsafety" and "Example", they should be
"Safety" and "Examples" according to RFC 1574.
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Stabilizes
* `<&mut str>::as_bytes_mut`
* `<Box<str>>::into_boxed_bytes`
* `std::str::from_boxed_utf8_unchecked`
* `std::str::from_utf8_mut`
* `std::str::from_utf8_unchecked_mut`
Closes #41119
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Stabilized
* `<str>::get`
* `<str>::get_mut`
* `<str>::get_unchecked`
* `<str>::get_unchecked_mut`
Closes #39932
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