Add feature gate for rvalue-static-promotion
Probably needs more tests (which ones?) and there may be other things that need to be done. Also not sure whether the version that introduces the flag is really `1.15.1`.
See https://github.com/rust-lang/rfcs/pull/1414.
Updates #38865.
Remove doc about highlighting code in other languages #40301
This doesn't appear to be true any longer, so removing it to avoid confusion. See #40301
Thoughts:
- may be a good idea to remove "Let's discuss the details of these code blocks.", as there's not much being discussed at this point;
- does `text` still work?
r? @steveklabnik
doc: fix inconsistency in error output in guessing-game.md
The line '.expect("failed to read line");' is partly started with a
lower case 'f' and partly with an uppercase one, adding additional
spurious changes to otherwise clean diffs if each sample is
copy-and-pasted over the previous.
This change starts the string with an uppercase everywhere which is in
line with the style of the other strings.
Unit-like structs doc: Improve code sample
r? @steveklabnik
BTW it seems that
```Rust
let p = Proton {};
```
compiles without an error. That's why I didn't add it to the example. It's about consistency anyway.
The line '.expect("failed to read line");' is partly started with a
lower case 'f' and partly with an uppercase one, adding additional
spurious changes to otherwise clean diffs if each sample is
copy-and-pasted over the previous.
This change starts the string with an uppercase everywhere which is in
line with the style of the other strings.
sort unstable book alphabetically
I made these the same order as they were in the compiler, but for no good reason. Much easier to find out what you need when they're sorted alphabetically
r? @frewsxcv
Structs doc: Change "pointers" to "references"
Let's call them "references" instead of "pointers". That's how they're called in chapter 4.9 "References and Borrowing".
r? @steveklabnik
I made these the same order as they were in the compiler, but for no good reason. Much easier to find out what you need when they're sorted alphabetically
Make lifetime elision docs clearer
Previously it said
"It's forbidden to allow reasoning about types based on the item signature alone."
I think that sentence is wrong. Rust **uses** the item signatures to perform type inference within the body. I think what's meant is the other way around: It does not infer types for item signatures.
r? @steveklabnik
