Fix help message for modification to &T created by &{t}
Previous:
```rust
error[E0594]: cannot assign to `*x` which is behind a `&` reference
--> src/main.rs:3:5
|
2 | let x: &usize = &mut{0};
| ------- help: consider changing this to be a mutable reference: `&mut mut{0}`
3 | *x = 1;
| ^^^^^^ `x` is a `&` reference, so the data it refers to cannot be written
```
Prefer a code snipped over formatting the self type (`new_without_default`)
Fixes: rust-lang/rust-clippy#7220
changelog: [`new_without_default`]: The `Default` impl block type doesn't use the full type path qualification
Have a nice day to everyone reading this 🙃
Some `clippy::author` improvements
changelog: none
* Use `Debug` instead of re-implementing it for some things
* Fix block trailing expression handing
* Don't double print on stmt/expr with `#[clippy::author]` attribute
- Accessing fields of a union require unsafe block
- As part of 2229 we don't allow precision where we need an unsafe block
to capture.
Fixes: #87378
r? @nikomatsakis
In the event a pattern starts with a leading pipe
the pattern span will contain, and begin with, the pipe.
This updates the process to see if a match arm contains
a leading pipe by leveraging this recent(ish) change to
the patterns in the AST, and avoids an indexing bug that
occurs when a pattern starts with a non-ascii char in the
old implementation.
* Updating outdated links
Updating the links to the docs and source code for `ast.rs`. Seems like it was moved to a new crate at some point.
* Updating more outdated links
This time, the links to the `fmt-rfcs` repository, which is now owned by
`rust-dev-tools` (although GitHub was redirecting anyway).
* Update Contributing.md
Co-authored-by: Caleb Cartwright <calebcartwright@users.noreply.github.com>
Co-authored-by: Caleb Cartwright <calebcartwright@users.noreply.github.com>
On stable, running with `--help|-h` shows information about `file-lines`
which is a nightly-only option. This commit removes all mention of
`file-lines` from the help message on stable.
There is room for improvement here; perhaps a new struct called, e.g.,
`StableOptions` could be added to complement the existing
`GetOptsOptions` struct. `StableOptions` could have a field for each
field in `GetOptsOptions`, with each field's value being a `bool` that
specifies whether or not the option exists on stable. Or is this adding
too much complexity?
This was added to Configurations.md in #4618, but the option wasn't
actually made available. This should let people who are using Rust 2021
on nightly rustc run `cargo fmt` again.
rename const checking visitor module to check_consts::check
This avoids naming ambiguities with "const validation" which is in `interpret/validity.rs` and checks *values*.
r? `@oli-obk`
`structhead` is used for `render_struct` so that the logic for rendering
structs can be shared between struct variants and struct items. However,
`render_union` is not used anywhere except for rendering union items, so
its `structhead` parameter is unnecessary.
Add support for custom allocator in `VecDeque`
This follows the [roadmap](https://github.com/rust-lang/wg-allocators/issues/7) of the allocator WG to add custom allocators to collections.
`@rustbot` modify labels: +A-allocators +T-libs
