Rust Search
Find the best content on Rust, curated by the community; a
search engine for Rustaceans.
## Summary [summary]: #summary By default, cargo will treat any optional dependency as a [feature](https://doc.rust-lang.org/cargo/reference/features.html). As of cargo 1.60, these can be disabled by declaring a feature that activates the o...
Summary This RFC describes a new key under features in Cargo.toml for documentation. This will allow Cargo to display this information to the user and provide a way for rustdoc to eventually render this data (how this is rendered is outside...
## Summary [summary]: #summary This RFC helps to codify the T-lang policy regarding `cargo check` vs `cargo build`. This is a policy RFC rather than a change to the language itself, and is thus "instantly stable" once accepted. There's no a...
## Summary In Rust 2024 and later editions, return position `impl Trait` (RPIT) opaque types will automatically capture all in-scope type *and* lifetime parameters. In preparation for this, new RPIT-like `impl Trait` features introduced int...
## Summary [summary]: #summary The Rust community has outgrown the current crates.io policies. This RFC proposes a new "Terms of Use" policy based on prior work by PyPI, npm and GitHub. ## Motivation [motivation]: #motivation > Why are we d...
## Summary This RFC proposes extending Rust's tooling support for safety hygiene to named fields that carry library safety invariants. Consequently, Rust programmers will be able to use the `unsafe` keyword to denote when a named field carr...
## Summary [summary]: #summary Create a new subteam focused on testing in the development workflow and to be responsible for ensuring Rust has a high quality automated testing experience that includes the capabilities developers expect when...
## Summary [summary]: #summary This RFC proposes adding new IEEE-compliant floating point types `f16` and `f128` into the core language and standard library. We will provide a soft float implementation for all targets, and use hardware supp...
## Summary [summary]: #summary It is unsafe to declare an `extern` block. Starting in Rust 2024, all `extern` blocks must be marked as `unsafe`. In all editions, items within `unsafe extern` blocks may be marked as safe to use. ## Motivatio...
## Summary [summary]: #summary Allow types that implement the new `trait Receiver<Target=Self>` to be the receiver of a method. ## Motivation [motivation]: #motivation Today, methods can only be received by value, by reference, or by one of...
## Summary [summary]: #summary * Permit `impl Trait` in fn return position within traits and trait impls. * Allow `async fn` in traits and trait impls to be used interchangeably with its equivalent `impl Trait` desugaring. * Allow trait imp...
## Summary [summary]: #summary This *experimental RFC* adds unstable support for single-file packages in cargo so we can explore the design and resolve questions with an implementation to collect feedback on. Single-file packages are `.rs`...
## RFC: result_ffi_guarantees - Feature Name: `result_ffi_guarantees` - Start Date: 2023-02-15 - RFC PR: [rust-lang/rfcs#3391](https://github.com/rust-lang/rfcs/pull/3391) - Rust Issue: [rust-lang/rust#110503](https://github.com/rust-lang/r...
## Summary [summary]: #summary This RFC adds a "detailed" feature definition: ```toml [features] # same as `foo = []` foo = { enables = [] } ``` This is to unblock the following RFCs: - [Cargo feature descriptions](https://github.com/rust-l...
## Summary [summary]: #summary This RFC adds support for single-file bin packages in cargo. Single-file bin packages are rust source files with an embedded manifest and a `main`. These files will be accepted by cargo commands as `--manifest...
## Summary [summary]: #summary Let's make it more elegant to conditionally compile trait bounds by allowing cfg-attributes directly in where clauses. ## Motivation [motivation]: #motivation Currently, there is limited support for conditiona...
## Summary [summary]: #summary Add a `[lints]` table to `Cargo.toml` to configure reporting levels for rustc and other tool lints. ## Motivation [motivation]: #motivation Currently, you can configure lints through - `#[<level>(<lint>)]` or...
## Summary [summary]: #summary This RFC proposed to add a stable `#[diagnostic]` attribute namespace, which contains attributes to influence error messages emitted by the compiler. In addition it proposed to add a `#[diagnostic::on_unimplem...
## Summary [summary]: #summary Enable upcasts from `dyn Trait1` to `dyn Trait2` if `Trait1` is a subtrait of `Trait2`. This RFC does not enable `dyn (Trait1 + Trait2)` for arbitrary traits. If `Trait1` has multiple supertraits, you can upca...
## Summary [summary]: #summary This RFC aims at providing rustdoc users the possibility to add visual markers to the rendered documentation to know under which conditions an item is available (currently possible through the following unstab...
"There is absolutely no way I can imagine that `Option` is causing that error. That'd be like turning on the "Hide Taskbar" setting causing your GPU to..."