mirror of
https://github.com/rust-lang/rust-analyzer
synced 2024-12-27 21:43:37 +00:00
154 lines
4.7 KiB
Markdown
154 lines
4.7 KiB
Markdown
This documents is an index of features that rust-analyzer language server
|
|
provides. Shortcuts are for the default VS Code layout. If there's no shortcut,
|
|
you can use <kbd>Ctrl+Shift+P</kbd> to search for the corresponding action.
|
|
|
|
### Workspace Symbol <kbd>ctrl+t</kbd>
|
|
|
|
Uses fuzzy-search to find types, modules and function by name across your
|
|
project and dependencies. This is **the** most useful feature, which improves code
|
|
navigation tremendously. It mostly works on top of the built-in LSP
|
|
functionality, however `#` and `*` symbols can be used to narrow down the
|
|
search. Specifically,
|
|
|
|
- `Foo` searches for `Foo` type in the current workspace
|
|
- `foo#` searches for `foo` function in the current workspace
|
|
- `Foo*` searches for `Foo` type among dependencies, including `stdlib`
|
|
- `foo#*` searches for `foo` function among dependencies.
|
|
|
|
That is, `#` switches from "types" to all symbols, `*` switches from the current
|
|
workspace to dependencies.
|
|
|
|
### Document Symbol <kbd>ctrl+shift+o</kbd>
|
|
|
|
Provides a tree of the symbols defined in the file. Can be used to
|
|
|
|
* fuzzy search symbol in a file (super useful)
|
|
* draw breadcrumbs to describe the context around the cursor
|
|
* draw outline of the file
|
|
|
|
### On Typing Assists
|
|
|
|
Some features trigger on typing certain characters:
|
|
|
|
- typing `let =` tries to smartly add `;` if `=` is followed by an existing expression.
|
|
- Enter inside comments automatically inserts `///`
|
|
- typing `.` in a chain method call auto-indents
|
|
|
|
### Extend Selection
|
|
|
|
Extends the current selection to the encompassing syntactic construct
|
|
(expression, statement, item, module, etc). It works with multiple cursors. This
|
|
is a relatively new feature of LSP:
|
|
https://github.com/Microsoft/language-server-protocol/issues/613, check your
|
|
editor's LSP library to see if this feature is supported.
|
|
|
|
### Go to Definition
|
|
|
|
Navigates to the definition of an identifier.
|
|
|
|
### Go to Implementation
|
|
|
|
Navigates to the impl block of structs, enums or traits. Also implemented as a code lens.
|
|
|
|
### Go to Type Defintion
|
|
|
|
Navigates to the type of an identifier.
|
|
|
|
### Commands <kbd>ctrl+shift+p</kbd>
|
|
|
|
#### Run
|
|
|
|
Shows popup suggesting to run a test/benchmark/binary **at the current cursor
|
|
location**. Super useful for repeatedly running just a single test. Do bind this
|
|
to a shortcut!
|
|
|
|
#### Parent Module
|
|
|
|
Navigates to the parent module of the current module.
|
|
|
|
#### Matching Brace
|
|
|
|
If the cursor is on any brace (`<>(){}[]`) which is a part of a brace-pair,
|
|
moves cursor to the matching brace. It uses the actual parser to determine
|
|
braces, so it won't confuse generics with comparisons.
|
|
|
|
#### Join Lines
|
|
|
|
Join selected lines into one, smartly fixing up whitespace and trailing commas.
|
|
|
|
#### Show Syntax Tree
|
|
|
|
Shows the parse tree of the current file. It exists mostly for debugging
|
|
rust-analyzer itself.
|
|
|
|
#### Expand Macro Recursively
|
|
|
|
Shows the full macro expansion of the macro at current cursor.
|
|
|
|
#### Status
|
|
|
|
Shows internal statistic about memory usage of rust-analyzer
|
|
|
|
#### Run garbage collection
|
|
|
|
Manually triggers GC
|
|
|
|
#### Start Cargo Watch
|
|
|
|
Start `cargo watch` for live error highlighting. Will prompt to install if it's not already installed.
|
|
|
|
#### Stop Cargo Watch
|
|
|
|
Stop `cargo watch`
|
|
|
|
### Assists (Code Actions)
|
|
|
|
Assists, or code actions, are small local refactorings, available in a particular context.
|
|
They are usually triggered by a shortcut or by clicking a light bulb icon in the editor.
|
|
|
|
See [assists.md](./assists.md) for the list of available assists.
|
|
|
|
### Magic Completions
|
|
|
|
In addition to usual reference completion, rust-analyzer provides some ✨magic✨
|
|
completions as well:
|
|
|
|
Keywords like `if`, `else` `while`, `loop` are completed with braces, and cursor
|
|
is placed at the appropriate position. Even though `if` is easy to type, you
|
|
still want to complete it, to get ` { }` for free! `return` is inserted with a
|
|
space or `;` depending on the return type of the function.
|
|
|
|
When completing a function call, `()` are automatically inserted. If function
|
|
takes arguments, cursor is positioned inside the parenthesis.
|
|
|
|
There are postifx completions, which can be triggerd by typing something like
|
|
`foo().if`. The word after `.` determines postifx completion, possible variants are:
|
|
|
|
- `expr.if` -> `if expr {}`
|
|
- `expr.match` -> `match expr {}`
|
|
- `expr.while` -> `while expr {}`
|
|
- `expr.ref` -> `&expr`
|
|
- `expr.refm` -> `&mut expr`
|
|
- `expr.not` -> `!expr`
|
|
- `expr.dbg` -> `dbg!(expr)`
|
|
|
|
There also snippet completions:
|
|
|
|
#### Inside Expressions
|
|
|
|
- `pd` -> `println!("{:?}")`
|
|
- `ppd` -> `println!("{:#?}")`
|
|
|
|
#### Inside Modules
|
|
|
|
- `tfn` -> `#[test] fn f(){}`
|
|
|
|
### Code highlighting
|
|
|
|
Experimental feature to let rust-analyzer highlight Rust code instead of using the
|
|
default highlighter.
|
|
|
|
#### Rainbow highlighting
|
|
|
|
Experimental feature that, given code highlighting using rust-analyzer is
|
|
active, will pick unique colors for identifiers.
|