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I've been trying to research what zero cost abstractions Rust uses and I cannot find any meaningful info on anything other than [iterators](https://doc.rust-lang.org/stable/book/ch13-04-performance.html?highlight=zero%20cost) and [generics](https://doc.rust-lang.org/stable/book/ch10-01-syntax.html?highlight=zero%20cost#performance-of-code-using-generics). I've checked the main Rust...

Scripter17

Clarification for terms 'pointer' and 'non-pointer'

2

## Please don't rush with answer =) Hello, everyone. First of all, I do realize, that this question may look trivial for an experienced rust user, but for newcomer it...

solc42

Add `\r\n` to string_continue grammar

2

Not sure if this is necessary, but I wasn't 100% sure that crlf line endings would be supported (though in hindsight would be strange if they weren't)

ModProg

Clarify that #[repr(transparent)] is valid without a non-ZST field

2

The following is valid, but the prior language suggests it is not: ```rust #[repr(transparent)] enum Banana { Phone, } #[repr(transparent)] struct Blooey(()); #[repr(transparent)] struct Orange; ``` Of note: it's still...

kupiakos

tshepang

Document type alias impl trait

1

This feature is on track to be stabilized soon: https://github.com/rust-lang/rust/issues/63063 Until the feature is stabilized, CI will fail, because we can't use feature gates in the reference and we can't...

oli-obk

Fix parsing of doc comments which are turned into raw strings

4

PR prompted by https://github.com/dtolnay/syn/issues/771 ```rust macro_rules! m { (#[doc = $tt:tt]) => { stringify!($tt) }; } fn main() { println!(m! { ///test }); // output: r"test" } ``` Will also...

kraktus

Keyword - Usage Table

3

Just like we have the punctuation table that has links to where it's used, it'd be nice to have a table for keywords and where the keywords are used.

Havvy

Spawned off of https://github.com/rust-lang/rust/issues/81211#issuecomment-767111563 We need better documentation of the method resolution rules, in terms of how ambiguities are resolved (to either a single method or to a method ambiguity...

pnkfelix

'Type layout' and 'Dynamically Sized Types' pages disagree on whether the size of a pointer to a DST is defined

3

[The 'Dynamically Sized Types' page](https://doc.rust-lang.org/reference/dynamically-sized-types.html) pretty clearly states that the size of a pointer to a DST is twice the size of a regular pointer: > - [Pointer types](https://doc.rust-lang.org/reference/types/pointer.html) to...

Liamolucko