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## Summary Make `Self` a keyword. ## Motivation Right now, `Self` is just a regular identifier that happens to get a special meaning inside trait definitions and impls. Specifically, users are not forbidden from defining a type called `Self...
## Summary Make `CString` dereference to a token type `CStr`, which designates null-terminated string data. ```rust // Type-checked to only accept C strings fn safe_puts(s: &CStr) { unsafe { libc::puts(s.as_ptr()) }; } fn main() { let s = C...
## Summary Rename (maybe one of) the standard collections, so as to make the names more consistent. Currently, among all the alternatives, renaming `BinaryHeap` to `BinHeap` is the slightly preferred solution. ## Motivation In [this comment...
## Summary Replace `Vec::drain` by a method that accepts a range parameter. Add `String::drain` with similar functionality. ## Motivation Allowing a range parameter is strictly more powerful than the current version. E.g., see the following...
## Summary Feature gate unused attributes for backwards compatibility. ## Motivation Interpreting the current backwards compatibility rules strictly, it's not possible to add any further language features that use new attributes. For exampl...
## Summary Remove official support for the `ndebug` config variable, replace the current usage of it with a more appropriate `debug_assertions` compiler-provided config variable. ## Motivation The usage of 'ndebug' to indicate a release bui...
## Summary A [recent RFC](https://github.com/rust-lang/rfcs/pull/504) split what was previously `fmt::Show` into two traits, `fmt::Show` and `fmt::String`, with format specifiers `{:?}` and `{}` respectively. That RFC did not, however, esta...
## Summary Remove chaining of comparison operators (e.g. `a == b == c`) from the syntax. Instead, require extra parentheses (`(a == b) == c`). ## Motivation ```rust fn f(a: bool, b: bool, c: bool) -> bool { a == b == c } ``` This code is cu...
## Summary Establish a convention throughout the core libraries for unsafe functions constructing references out of raw pointers. The goal is to improve usability while promoting awareness of possible pitfalls with inferred lifetimes. ## Mo...
## Summary Change pattern matching on an `&mut T` to `&mut <pat>`, away from its current `&<pat>` syntax. ## Motivation Pattern matching mirrors construction for almost all types, *except* `&mut`, which is constructed with `&mut <expr>` but...
## Summary 1. Remove the `Sized` default for the implicitly declared `Self` parameter on traits. 2. Make it "object unsafe" for a trait to inherit from `Sized`. ## Motivation The primary motivation is to enable a trait object `SomeTrait` to...
## Summary * Remove the `std::c_vec` module * Move `std::c_str` under a new `std::ffi` module, not exporting the `c_str` module. * Focus `CString` on *Rust-owned* bytes, providing a static assertion that a pile of bytes has no interior nuls...
## Summary Rename the `#[deriving(Foo)]` syntax extension to `#[derive(Foo)]`. ## Motivation Unlike our other verb-based attribute names, "deriving" stands alone as a present participle. By convention our attributes prefer "warn" rather tha...
## Summary Statically enforce that the `std::fmt` module can only create valid UTF-8 data by removing the arbitrary `write` method in favor of a `write_str` method. ## Motivation Today it is conventionally true that the output from macros l...
## Summary This RFC proposes that we rename the pointer-sized integer types `int/uint`, so as to avoid misconceptions and misuses. After extensive community discussions and several revisions of this RFC, the finally chosen names are `isize/...
## Summary Future-proof the allowed forms that input to an MBE can take by requiring certain delimiters following NTs in a matcher. In the future, it will be possible to lift these restrictions backwards compatibly if desired. ## Key Termin...
## Summary Stabilize the `std::prelude` module by removing some of the less commonly used functionality of it. ## Motivation The prelude of the standard library is included into all Rust programs by default, and is consequently quite an imp...
## Summary Today's `Show` trait will be tasked with the purpose of providing the ability to inspect the representation of implementors of the trait. A new trait, `String`, will be introduced to the `std::fmt` module to in order to represent...
## Summary This RFC proposes the `mod` keyword used to refer the immediate parent namespace in `use` items (`use a::b::{mod, c}`) to be changed to `self`. ## Motivation While this looks fine: ````rust use a::b::{mod, c}; pub mod a { pub mod...
## Summary In order to prepare for an expected future implementation of [non-zeroing dynamic drop], remove support for: * moving individual elements into an *uninitialized* fixed-sized array, and * moving individual elements out of fixed-si...
"[...] clippy is for people who find a certain emptiness inside when they finally get code through the compiler.😉"
— Unknown person answering the Rust survey