### Example installation output

Source: https://github.com/rust-lang/rust-analyzer/blob/master/docs/book/src/contributing/setup.md

Expected output format showing the path to the installed rust-analyzer binary.

```text
Installing <path-to-rust-analyzer-binary>
Installed package `rust-analyzer v0.0.0 (<path-to-rust-analyzer-binary>)` (executable `rust-analyzer.exe`)
```

--------------------------------

### Struct Constructor Example

Source: https://github.com/rust-lang/rust-analyzer/blob/master/crates/ide/src/syntax_highlighting/test_data/highlight_doctest.html

Example usage for the Foo constructor.

```rust
# #![allow(unused_mut)]
let mut foo: Foo = Foo::new();
```

--------------------------------

### Build and install only the LSP server

Source: https://github.com/rust-lang/rust-analyzer/blob/master/docs/book/src/vs_code.md

Compile and install only the language server component from source.

```bash
cargo xtask install --server
```

--------------------------------

### Build and install from source

Source: https://github.com/rust-lang/rust-analyzer/blob/master/docs/book/src/vs_code.md

Clone the repository and use the xtask script to build and install both the server and the VS Code plugin.

```bash
git clone https://github.com/rust-lang/rust-analyzer.git && cd rust-analyzer
cargo xtask install
```

--------------------------------

### Foo Method Examples

Source: https://github.com/rust-lang/rust-analyzer/blob/master/crates/ide/src/syntax_highlighting/test_data/highlight_doctest.html

Various examples demonstrating method usage, multi-line comments, and string literals.

```rust
use x::y;

let foo = Foo::new();

// calls bar on foo
assert!(foo.bar());

let bar = foo.bar || Foo::bar;

/* multi-line
       comment */

let multi_line_string = "Foo
  bar\n
         ";
```

```rust
let foobar = Foo::new().bar();
```

```rust
// code block with tilde.
let foobar = Foo::new().bar();
```

```rust
// functions
fn foo<T, const X: usize>(arg: i32) {
    let x: T = X;
}
```

```sh
echo 1
```

--------------------------------

### Install rust-analyzer on Linux

Source: https://github.com/rust-lang/rust-analyzer/blob/master/docs/book/src/rust_analyzer_binary.md

Installs the rust-analyzer binary to ~/.local/bin. Ensure the URL is correct for your system architecture.

```bash
mkdir -p ~/.local/bin
curl -L https://github.com/rust-lang/rust-analyzer/releases/latest/download/rust-analyzer-x86_64-unknown-linux-gnu.gz | gunzip -c - > ~/.local/bin/rust-analyzer
chmod +x ~/.local/bin/rust-analyzer
```

--------------------------------

### Installing proc-macro Server with xtask

Source: https://github.com/rust-lang/rust-analyzer/blob/master/crates/proc-macro-srv-cli/README.md

Recommended method to install the proc-macro server for local testing purposes using the xtask command.

```bash
# Recommended: use the xtask command
cargo xtask install --proc-macro-server
```

--------------------------------

### Install rust-analyzer locally

Source: https://github.com/rust-lang/rust-analyzer/blob/master/docs/book/src/contributing/setup.md

Use the xtask command to build and install the language server binary for a specific editor instance.

```sh
# Install only the language server  
cargo xtask install --server \  
    --code-bin code-insiders \  # Target a specific editor (code, code-exploration, code-insiders, codium, or code-oss)  
    --dev-rel  # Build in release mode with debug info level 2  
```

--------------------------------

### Install mdbook and Serve Documentation Locally

Source: https://github.com/rust-lang/rust-analyzer/blob/master/docs/book/README.md

Installs the mdbook tool and serves the documentation site locally. Changes to documentation files will trigger automatic rebuilds.

```bash
cargo install mdbook
cargo xtask codegen
cd docs/book
mdbook serve
```

--------------------------------

### Install TypeScript dependencies

Source: https://github.com/rust-lang/rust-analyzer/blob/master/docs/book/src/contributing/debugging.md

Navigate to the extension directory and install dependencies using npm.

```bash
cd editors/code
npm ci
```

--------------------------------

### Discover Command Output - Progress Event Example

Source: https://github.com/rust-lang/rust-analyzer/blob/master/docs/book/src/configuration_generated.md

Example of a progress event output by the discover command in JSONL format.

```json
{"kind":"progress","message":"generating rust-project.json"}
```

--------------------------------

### Install rust-analyzer on macOS with Homebrew

Source: https://github.com/rust-lang/rust-analyzer/blob/master/docs/book/src/rust_analyzer_binary.md

Installs rust-analyzer using Homebrew on macOS.

```bash
brew install rust-analyzer
```

--------------------------------

### Discover Command Output - Finished Event Example

Source: https://github.com/rust-lang/rust-analyzer/blob/master/docs/book/src/configuration_generated.md

Example of a finished event output by the discover command, indicating successful project data generation.

```json
{
    "kind": "finished",
    "buildfile": "rust-analyzer/BUCK",
    "project": {
        "sysroot": "foo",
        "crates": []
    }
}
```

--------------------------------

### On Enter Request Example (Before)

Source: https://github.com/rust-lang/rust-analyzer/blob/master/docs/book/src/contributing/lsp-extensions.md

Demonstrates the code context for the `experimental/onEnter` request, triggered by pressing the Enter key. This example shows a comment line.

```rust
fn main() {
    // Some /*cursor here*/ docs
    let x = 92;
}
```

--------------------------------

### Configuration Example

Source: https://github.com/rust-lang/rust-analyzer/blob/master/xtask/test_data/expected.md

This JSON snippet demonstrates a basic configuration setting. It is typically used for setting up tools or features.

```json
{"foo":"bar"}
```

--------------------------------

### Install rust-analyzer on Arch Linux

Source: https://github.com/rust-lang/rust-analyzer/blob/master/docs/book/src/rust_analyzer_binary.md

Installs rust-analyzer using pacman on Arch Linux. This installs the version built from the latest tagged source.

```bash
pacman -S rust-analyzer
```

--------------------------------

### Install rust-analyzer from Source

Source: https://github.com/rust-lang/rust-analyzer/blob/master/docs/book/src/rust_analyzer_binary.md

Installs rust-analyzer from source using cargo xtask. Requires the latest stable Rust toolchain.

```bash
git clone https://github.com/rust-lang/rust-analyzer.git && cd rust-analyzer
cargo xtask install --server
```

--------------------------------

### Example for Hover Range Selection

Source: https://github.com/rust-lang/rust-analyzer/blob/master/docs/book/src/contributing/lsp-extensions.md

Illustrates using a `Range` in `HoverParams` to get hover information for a selected expression.

```rust
fn main() {
    let expression = $01 + 2 * 3$0;
}

```

--------------------------------

### Install rustc-josh-sync tool

Source: https://github.com/rust-lang/rust-analyzer/blob/master/docs/book/src/contributing/README.md

Install the synchronization tool for managing subtree changes between rust-analyzer and rust-lang/rust repositories.

```bash
cargo install --locked --git https://github.com/rust-lang/josh-sync
```

--------------------------------

### Install vim-lsp plugin

Source: https://github.com/rust-lang/rust-analyzer/blob/master/docs/book/src/other_editors.md

Add the plugin to your .vimrc file.

```vim
Plug 'prabirshrestha/vim-lsp'
```

--------------------------------

### Discover Command Path Invocation Example

Source: https://github.com/rust-lang/rust-analyzer/blob/master/docs/book/src/configuration_generated.md

Example of how rust-analyzer uses the path invocation to find and generate a rust-project.json.

```shell
rust-project develop-json '{ "path": "myproject/src/main.rs" }'
```

--------------------------------

### Discover Command Buildfile Invocation Example

Source: https://github.com/rust-lang/rust-analyzer/blob/master/docs/book/src/configuration_generated.md

Example of how rust-analyzer uses a build file invocation to update an existing workspace configuration.

```shell
rust-project develop-json '{ "buildfile": "myproject/BUCK" }'
```

--------------------------------

### Impl Block Documentation

Source: https://github.com/rust-lang/rust-analyzer/blob/master/crates/ide/src/syntax_highlighting/test_data/highlight_doctest.html

Documentation example within an implementation block.

```rust
fn foo() {

}
```

--------------------------------

### Install rust-analyzer Client

Source: https://github.com/rust-lang/rust-analyzer/blob/master/docs/book/src/contributing/README.md

After fixing the VS Code extension, use `cargo xtask install --client` to install the updated client. This command ensures the latest changes are applied to the extension.

```bash
cargo xtask install --client
```

--------------------------------

### Minimal Bug Reproduction Example

Source: https://github.com/rust-lang/rust-analyzer/blob/master/docs/book/src/troubleshooting.md

A template for creating a minimal reproducible example for bug reports. Includes cloning a repo, checking out a specific commit, and running analysis stats.

```bash
git clone https://github.com/username/repo.git && cd repo && git switch --detach commit-hash
rust-analyzer --version
rust-analyzer dd12184e4 2021-05-08 dev
rust-analyzer analysis-stats .
```

--------------------------------

### Workspace Configuration Discovery Example

Source: https://github.com/rust-lang/rust-analyzer/blob/master/docs/book/src/configuration_generated.md

Configure a command to dynamically obtain workspace configuration. This is an alternative to manually generating rust-project.json.

```json
{
    "command": [
        "rust-project",
        "develop-json",
        "{arg}"
    ],
    "progressLabel": "buck2/rust-project",
    "filesToWatch": [
        "BUCK"
    ]
}
```

--------------------------------

### Early Struct Documentation

Source: https://github.com/rust-lang/rust-analyzer/blob/master/crates/ide/src/syntax_highlighting/test_data/highlight_doctest.html

Documentation example placed before a struct definition.

```rust
let _ = "early doctests should not go boom";
```

--------------------------------

### Mix and Match Documentation

Source: https://github.com/rust-lang/rust-analyzer/blob/master/crates/ide/src/syntax_highlighting/test_data/highlight_doctest.html

Examples demonstrating conditional documentation attributes and mixed content.

```rust
let _ = example(&[1, 2, 3]);
```

```rust
loop {}
```

```rust
let _ = example(&alloc::vec![1, 2, 3]);
```

--------------------------------

### Join Lines Example (Before)

Source: https://github.com/rust-lang/rust-analyzer/blob/master/docs/book/src/contributing/lsp-extensions.md

Shows the code state before the `experimental/joinLines` request is applied. The server will process this to join the lines.

```rust
fn main() {
    /*cursor here*/let x = {
        92
    };
}
```

--------------------------------

### Install npm Dependencies and Lint Code

Source: https://github.com/rust-lang/rust-analyzer/blob/master/docs/book/src/contributing/README.md

Navigate to the `editors/code` directory and run `npm ci` to install dependencies, followed by `npm run lint` to check for code style issues. This is part of the process for changing files under `editors/code`.

```bash
cd editors/code
npm ci
npm run lint
```

--------------------------------

### Rust Module and Visibility Example

Source: https://github.com/rust-lang/rust-analyzer/blob/master/crates/ide/src/syntax_highlighting/test_data/highlight_crate_root.html

Demonstrates module nesting, crate-level imports, and scoped visibility modifiers for constants.

```rust
extern crate foo;
use core::iter;

pub const NINETY_TWO: u8 = 92;

use foo as foooo;

pub(crate) fn main() {
    let baz = iter::repeat(92);
}

mod bar {
    pub(in super) const FORTY_TWO: u8 = 42;

    mod baz {
        use super::super::NINETY_TWO;
        use crate::foooo::Point;

        pub(in super::super) const TWENTY_NINE: u8 = 29;
    }
}
```

--------------------------------

### Install VS Code extension via CLI

Source: https://github.com/rust-lang/rust-analyzer/blob/master/docs/book/src/vs_code.md

Use the command line to install a downloaded VSIX file for the rust-analyzer extension.

```bash
code --install-extension /path/to/rust-analyzer.vsix
```

--------------------------------

### Rebuild and reinstall server

Source: https://github.com/rust-lang/rust-analyzer/blob/master/docs/book/src/contributing/setup.md

Commands to verify the project and update the local installation after making code changes.

```sh
cargo check  
cargo xtask install --server --code-bin code-insiders --dev-rel  
```

--------------------------------

### Macro Formatting and Assertions

Source: https://github.com/rust-lang/rust-analyzer/blob/master/crates/ide/src/syntax_highlighting/test_data/highlight_strings.html

Examples of using println!, panic!, assert!, and custom macros with various formatting arguments.

```rust
println!("{\x41}", A = 92);
println!("{ничоси}", ничоси = 92);

println!("{:x?} {} ", thingy, n2);
panic!("{}", 0);
panic!("more {}", 1);
assert!(true, "{}", 1);
assert!(true, "{} asdasd", 1);
toho!("{}fmt", 0);
```

--------------------------------

### Block Comment Documentation

Source: https://github.com/rust-lang/rust-analyzer/blob/master/crates/ide/src/syntax_highlighting/test_data/highlight_doctest.html

Examples using block comments for documentation.

```rust
let _ = example(&[1, 2, 3]);
```

```rust
let _ = example(&[1, 2, 3]);
```

--------------------------------

### Example for experimental/openCargoToml

Source: https://github.com/rust-lang/rust-analyzer/blob/master/docs/book/src/contributing/lsp-extensions.md

Demonstrates the usage of the `experimental/openCargoToml` request, showing a cursor position within a Cargo.toml file.

```rust
// Cargo.toml
[package]
// src/main.rs

/* cursor here*/

```

--------------------------------

### Parent Module Navigation Example

Source: https://github.com/rust-lang/rust-analyzer/blob/master/docs/book/src/contributing/lsp-extensions.md

Illustrates the context for the `experimental/parentModule` request, which helps the client navigate to the parent module declaration.

```rust
// src/main.rs
mod foo;
// src/foo.rs

/* cursor here*/
```

--------------------------------

### Join Lines Example (After)

Source: https://github.com/rust-lang/rust-analyzer/blob/master/docs/book/src/contributing/lsp-extensions.md

Illustrates the result after the `experimental/joinLines` request, where the curly braces are removed and the lines are joined.

```rust
fn main() {
    let x = 92;
}
```

--------------------------------

### Character Literals and Formatting Examples

Source: https://github.com/rust-lang/rust-analyzer/blob/master/crates/ide/src/syntax_highlighting/test_data/highlight_strings.html

Demonstrates various character literal types and extensive usage of the println! macro for string formatting.

```rust
fn main() {
        let a = '\n';
        let a = '\t';
        let a = '\e'; // invalid escape
        let a = 'e';
        let a = ' ';
        let a = '\u{48}';
        let a = '\u{4823}';
        let a = '\x65';
        let a = '\x00';
    
        let a = b'\xFF';
    
        println!("Hello {{Hello}}");
        // from https://doc.rust-lang.org/std/fmt/index.html
        println!("Hello");                 // => "Hello"
        println!("Hello, {}!", "world");   // => "Hello, world!"
        println!("The number is {}", 1);   // => "The number is 1"
        println!("{:?}", (3, 4));          // => "(3, 4)"
        println!("{value}", value=4);      // => "4"
        println!("{} {}", 1, 2);           // => "1 2"
        println!("{:04}", 42);             // => "0042" with leading zerosV
        println!("{1} {} {0} {}", 1, 2);   // => "2 1 1 2"
        println!("{argument}", argument = "test");   // => "test"
        println!("{name} {}", 1, name = 2);          // => "2 1"
        println!("{a} {c} {b}", a="a", b='b', c=3);  // => "a 3 b"
        println!("{{{}}}", 2);                       // => "{2}"
        println!("Hello {:5}!", "x");
        println!("Hello {:1$}!", "x", 5);
        println!("Hello {1:0$}!", 5, "x");
        println!("Hello {:width$}!", "x", width = 5);
        println!("Hello {:<5}!", "x");
        println!("Hello {:-<5}!", "x");
        println!("Hello {:^5}!", "x");
        println!("Hello {:>5}!", "x");
        println!("Hello {:+}!", 5);
        println!("{:#x}!", 27);
        println!("Hello {:05}!", 5);
        println!("Hello {:05}!", -5);
        println!("{:#010x}!", 27);
        println!("Hello {0} is {1:.5}", "x", 0.01);
        println!("Hello {1} is {2:.0$}", 5, "x", 0.01);
        println!("Hello {0} is {2:.1$}", "x", 5, 0.01);
        println!("Hello {} is {:.*}",    "x", 5, 0.01);
        println!("Hello {} is {2:.*}",   "x", 5, 0.01);
        println!("Hello {} is {number:.prec$}", "x", prec = 5, number = 0.01);
        println!("{}, `{name:.*}` has 3 fractional digits", "Hello", 3, name=1234.56);
        println!("{}, `{name:.*}` has 3 characters", "Hello", 3, name="1234.56");
        println!("{}, `{name:>8.*}` has 3 right-aligned characters", "Hello", 3, name="1234.56");
    
        let _ = "{}"
    }
```

--------------------------------

### Hierarchical Profiler Output Example

Source: https://github.com/rust-lang/rust-analyzer/blob/master/docs/book/src/contributing/architecture.md

Example output from the `hprof` profiler, showing time spent in different functions. Enabled with `RA_PROFILE='*>50'`.

```text
85ms - handle_completion
    68ms - import_on_the_fly
        67ms - import_assets::search_for_relative_paths
             0ms - crate_def_map:wait (804 calls)
             0ms - find_path (16 calls)
             2ms - find_similar_imports (1 calls)
             0ms - generic_params_query (334 calls)
            59ms - trait_solve_query (186 calls)
         0ms - Semantics::analyze_impl (1 calls)
         1ms - render_resolution (8 calls)
     0ms - Semantics::analyze_impl (5 calls)
```

--------------------------------

### Add rust-analyzer via rustup

Source: https://github.com/rust-lang/rust-analyzer/blob/master/docs/book/src/rust_analyzer_binary.md

Installs rust-analyzer as a component using rustup.

```bash
rustup component add rust-analyzer
```

--------------------------------

### Structural Search Replace Example

Source: https://github.com/rust-lang/rust-analyzer/blob/master/docs/book/src/contributing/lsp-extensions.md

Provides an example of an SSR query transforming `foo($a, $b)` into `($a).foo($b)`, demonstrating a basic syntax tree-based code transformation.

```string
SSR with query `foo($a, $b) ==>> ($a).foo($b)` will transform, eg `foo(y + 5, z)` into `(y + 5).foo(z)`.
```

--------------------------------

### Discover Argument Substitution Example

Source: https://github.com/rust-lang/rust-analyzer/blob/master/docs/book/src/configuration_generated.md

Illustrates the substitution of the {arg} placeholder in the discover command with a JSON-serialized enum representing either a path or a buildfile.

```rust
#[derive(PartialEq, Clone, Debug, Serialize)]
#[serde(rename_all = "camelCase")]
pub enum DiscoverArgument {
   Path(AbsPathBuf),
   Buildfile(AbsPathBuf),
}
```

--------------------------------

### Example of Hover Actions UI

Source: https://github.com/rust-lang/rust-analyzer/blob/master/docs/book/src/contributing/lsp-extensions.md

Illustrates how command link groups are displayed in the UI, with and without titles.

```plaintext
  +-----------------------------+
  | Hover content               |
  |                             |
  +-----------------------------+
  | _Action1_ | _Action2_       |
  +-----------------------------+
  | TITLE _Action1_ | _Action2_ |
  +-----------------------------+
  ...
```

--------------------------------

### Running proc-macro-srv-cli with Required Environment Variable

Source: https://github.com/rust-lang/rust-analyzer/blob/master/crates/proc-macro-srv-cli/README.md

Example of how to run the proc-macro-srv-cli binary, demonstrating the necessity of setting the `RUST_ANALYZER_INTERNALS_DO_NOT_USE` environment variable.

```bash
RUST_ANALYZER_INTERNALS_DO_NOT_USE=1 rust-analyzer-proc-macro-srv --version
```

--------------------------------

### Module Doc Injection Test

Source: https://github.com/rust-lang/rust-analyzer/blob/master/crates/ide/src/syntax_highlighting/test_data/highlight_doctest.html

A basic module-level documentation example.

```rust
fn test() {}
```

--------------------------------

### Configure Runnable for Tests

Source: https://github.com/rust-lang/rust-analyzer/blob/master/docs/book/src/non_cargo_based_projects.md

Example JSON configuration for a test runnable within the rust-project.json file.

```json
{
    "program": "buck",
    "args": [
        "test",
         "{label}",
         "--",
         "{test_id}",
         "--print-passing-details"
    ],
    "cwd": "/home/user/repo-root/",
    "kind": "testOne"
}
```

--------------------------------

### Example Usage of Matching Brace

Source: https://github.com/rust-lang/rust-analyzer/blob/master/docs/book/src/contributing/lsp-extensions.md

Illustrates a scenario where the 'experimental/matchingBrace' request might be used in a Rust code snippet.

```rust
fn main() {
    let x: Vec<()>/*cursor here*/ = vec![];
}
```

--------------------------------

### Install Rust Standard Library Source

Source: https://github.com/rust-lang/rust-analyzer/blob/master/docs/book/src/installation.md

Use this command to add the Rust standard library source code, which is required by rust-analyzer. Ensure you are using a compatible toolchain.

```bash
rustup component add rust-src
```

--------------------------------

### On Enter Request Example (After)

Source: https://github.com/rust-lang/rust-analyzer/blob/master/docs/book/src/contributing/lsp-extensions.md

Shows the snippet returned by the `experimental/onEnter` request, demonstrating comment continuation and automatic indentation. The `$0` indicates the final cursor position.

```rust
fn main() {
    // Some
    // $0 docs
    let x = 92;
}
```

--------------------------------

### Rust Syntax and Keyword Usage

Source: https://github.com/rust-lang/rust-analyzer/blob/master/crates/ide/src/syntax_highlighting/test_data/highlight_keywords_2015.html

Examples of module imports, macro definitions, and various Rust keywords including edition-dependent and reserved identifiers.

```rust
    extern crate self;
    
    use crate;
    use self;
    mod __ {
        use super::*;
    }
    
    macro_rules! void {
        ($($tt:tt)*) => {discard!($($tt:tt)*)}
    }
    
    struct __ where Self:;
    fn __(_: Self) {}
    void!(Self);
    
    // edition dependent
    void!(try async await gen);
    // edition and context dependent
    void!(dyn);
    // builtin custom syntax
    void!(builtin offset_of format_args asm);
    // contextual
    void!(macro_rules, union, default, raw, auto, yeet);
    // reserved
    void!(abstract become box do final macro override priv typeof unsized virtual yield);
    void!('static 'self 'unsafe)
```

--------------------------------

### Custom Macro Definitions

Source: https://github.com/rust-lang/rust-analyzer/blob/master/crates/ide/src/syntax_highlighting/test_data/highlight_strings.html

Examples of defining macros using macro_rules! and the experimental macro keyword for panic handling and string formatting.

```rust
macro_rules! println {
        ($($arg:tt)*) => ({
            $crate::io::_print(format_args_nl!($($arg)*));
        })
    }
    
    mod panic {
        pub macro panic_2015 {
            () => (
                panic("explicit panic")
            ),
            ($msg:literal $(,)?) => (
                panic($msg)
            ),
            // Use `panic_str` instead of `panic_display::<&str>` for non_fmt_panic lint.
            ($msg:expr $(,)?) => (
                panic_str($msg)
            ),
            // Special-case the single-argument case for const_panic.
            ("{}", $arg:expr $(,)?) => (
                panic_display(&$arg)
            ),
            ($fmt:expr, $($arg:tt)+) => (
                panic_fmt(const_format_args!($fmt, $($arg)+))
            ),
        }
    }
    
    macro_rules! toho {
        () => ($crate::panic!("not yet implemented"));
        ($($arg:tt)+) => ($crate::panic!("not yet implemented: {}", format_args!($($arg)+)));
    }
    
    macro_rules! reuse_twice {
        ($literal:literal) => {{stringify!($literal); format_args!($literal)}};
    }
```

--------------------------------

### Rust Mutable Reference Example

Source: https://github.com/rust-lang/rust-analyzer/blob/master/crates/ide/src/syntax_highlighting/test_data/highlight_issue_19357.html

Demonstrates the creation of a mutable raw pointer in Rust. This syntax is typically used in unsafe blocks or for specific low-level operations.

```rust
fn main() {
        let x = &raw mut 5;
    }
```

--------------------------------

### Define Rust Fixture with Function and Placeholder

Source: https://github.com/rust-lang/rust-analyzer/blob/master/crates/ide/src/syntax_highlighting/test_data/highlight_injection.html

This example demonstrates defining a fixture with a function and a placeholder `$0` which is often used for cursor positioning or code insertion points in testing scenarios.

```rust
fixture(r"
    fn foo() {
        foo($0{
            92
        }$0)
    }"
        );
```

--------------------------------

### Configure Kakoune for rust-analyzer

Source: https://github.com/rust-lang/rust-analyzer/blob/master/docs/book/src/other_editors.md

This Kakoune script enables LSP for Rust files, sets up auto-formatting on save, and configures inlay hints. Ensure `kak-lsp` is installed and configured.

```shell
eval %sh{kak-lsp --kakoune -s $kak_session}  # Not needed if you load it with plug.kak.
hook global WinSetOption filetype=rust %{
    # Enable LSP
    lsp-enable-window

    # Auto-formatting on save
    hook window BufWritePre .* lsp-formatting-sync

    # Configure inlay hints (only on save)
    hook window -group rust-inlay-hints BufWritePost .* rust-analyzer-inlay-hints
    hook -once -always window WinSetOption filetype=.* %{
        remove-hooks window rust-inlay-hints
    }
}
```

--------------------------------

### Set up release environment

Source: https://github.com/rust-lang/rust-analyzer/blob/master/docs/book/src/contributing/README.md

Ensure rust-analyzer, rust-analyzer.github.io, and rust-lang/rust repositories are checked out in the same directory. The 'rust-analyzer' remote must be named 'upstream'.

```bash
./rust-analyzer
./rust-analyzer.github.io
./rust-rust-analyzer  # Note the name!
```

--------------------------------

### Building proc-macro-srv-cli with `in-rust-tree` Feature

Source: https://github.com/rust-lang/rust-analyzer/blob/master/crates/proc-macro-srv-cli/README.md

Instructions for building the proc-macro-srv-cli binary with the necessary `in-rust-tree` feature, using either a nightly toolchain or stable with `RUSTC_BOOTSTRAP=1`.

```bash
# Using nightly toolchain
cargo build -p proc-macro-srv-cli --features in-rust-tree
```

```bash
# Or with RUSTC_BOOTSTRAP on stable
RUSTC_BOOTSTRAP=1 cargo build -p proc-macro-srv-cli --features in-rust-tree
```

--------------------------------

### Check rust-analyzer Version

Source: https://github.com/rust-lang/rust-analyzer/blob/master/docs/book/src/troubleshooting.md

Verify the installed rust-analyzer version. Update if the version is older than a week.

```bash
rust-analyzer --version
```

--------------------------------

### Numeric Literal Tokenization

Source: https://github.com/rust-lang/rust-analyzer/blob/master/crates/parser/test_data/lexer/ok/numbers.txt

Examples of integer and floating-point literals including various bases, underscores, and suffixes.

```text
INT_NUMBER "0"
WHITESPACE " "
INT_NUMBER "00"
WHITESPACE " "
INT_NUMBER "0_"
WHITESPACE " "
FLOAT_NUMBER "0."
WHITESPACE " "
INT_NUMBER "0z"
WHITESPACE "\n"
INT_NUMBER "01790"
WHITESPACE " "
INT_NUMBER "0b1790"
WHITESPACE " "
INT_NUMBER "0o1790"
WHITESPACE " "
INT_NUMBER "0x1790aAbBcCdDeEfF"
WHITESPACE " "
INT_NUMBER "001279"
WHITESPACE " "
INT_NUMBER "0_1279"
WHITESPACE " "
FLOAT_NUMBER "0.1279"
WHITESPACE " "
FLOAT_NUMBER "0e1279"
WHITESPACE " "
FLOAT_NUMBER "0E1279"
WHITESPACE "\n"
INT_NUMBER "0"
DOT "."
DOT "."
INT_NUMBER "2"
WHITESPACE "\n"
INT_NUMBER "0"
DOT "."
IDENT "foo"
L_PAREN "("
R_PAREN ")"
WHITESPACE "\n"
FLOAT_NUMBER "0e+1"
WHITESPACE "\n"
INT_NUMBER "0"
DOT "."
IDENT "e"
PLUS "+"
INT_NUMBER "1"
WHITESPACE "\n"
FLOAT_NUMBER "0.0E-2"
WHITESPACE "\n"
FLOAT_NUMBER "0___0.10000____0000e+111__"
WHITESPACE "\n"
INT_NUMBER "1i64"
WHITESPACE " "
FLOAT_NUMBER "92.0f32"
WHITESPACE " "
INT_NUMBER "11__s"
WHITESPACE "\n"
```

--------------------------------

### Demonstrate format_args macro usage

Source: https://github.com/rust-lang/rust-analyzer/blob/master/crates/ide/src/syntax_highlighting/test_data/highlight_strings_disabled.html

Shows the usage of the format_args macro with standard and invalid escape sequences.

```rust
fn main() {
    format_args!("foo\nbar");
    format_args!("foo\invalid");
}
```

--------------------------------

### Run the release xtask

Source: https://github.com/rust-lang/rust-analyzer/blob/master/docs/book/src/contributing/README.md

Execute the main release xtask after setting the GITHUB_TOKEN environment variable. This command automates checkout, pushing, packaging, and release creation.

```bash
cargo xtask release
```

--------------------------------

### Rust Hello World Program

Source: https://github.com/rust-lang/rust-analyzer/blob/master/crates/ide/src/syntax_highlighting/test_data/highlight_comments_disabled.html

A basic Rust program that prints 'Hello, world!' to the console. Includes regular and documentation comments.

```rust
// This is a regular comment
/// This is a doc comment
fn main() {
    // Another comment
    println!("Hello, world!");
}
```

--------------------------------

### Variable declaration and string conversion in Rust

Source: https://github.com/rust-lang/rust-analyzer/blob/master/crates/ide/src/syntax_highlighting/test_data/highlight_rainbow.html

Demonstrates basic variable assignment and string conversion methods.

```rust
fn main() {
    let hello = "hello";
    let x = hello.to_string();
    let y = hello.to_string();

    let x = "other color please!";
    let y = x.to_string();
}
```

--------------------------------

### Update Nightly Rust Toolchain

Source: https://github.com/rust-lang/rust-analyzer/blob/master/xtask/test_data/expected.md

This bash command updates the nightly version of the Rust toolchain. Ensure you have rustup installed.

```bash
rustup update nightly
```

--------------------------------

### Configure rust-analyzer server path

Source: https://github.com/rust-lang/rust-analyzer/blob/master/docs/book/src/contributing/setup.md

JSON configuration for VS Code User Settings to point to the local development binary.

```json
{
    "rust-analyzer.server.path": "<path-to-rust-analyzer-binary>"
}
```

--------------------------------

### Initialize and Query LineIndex

Source: https://github.com/rust-lang/rust-analyzer/blob/master/lib/line-index/README.md

Demonstrates creating a LineIndex instance from a string and performing coordinate conversions.

```rust
use line_index::LineIndex;

let line_index = LineIndex::new("This is a\nmulti-line\ntext.");
line_index.line_col(3.into()); // LineCol { line: 0, col: 3 }
line_index.line_col(13.into()); // LineCol { line: 1, col: 3 }
line_index.offset(LineCol { line: 2, col: 3 }); // Some (24)
```

--------------------------------

### Example of Source Code with Comments

Source: https://github.com/rust-lang/rust-analyzer/blob/master/docs/book/src/contributing/syntax.md

Illustrates how non-doc comments are heuristically attached as children to nodes, such as function nodes, during parsing.

```rust
// non doc comment
fn foo() {}
```

--------------------------------

### Run Flycheck Parameters Interface

Source: https://github.com/rust-lang/rust-analyzer/blob/master/docs/book/src/contributing/lsp-extensions.md

Defines parameters for the runFlycheck notification, specifying the text document for which to start flycheck processes.

```typescript
interface RunFlycheckParams {
    /// The text document whose cargo workspace flycheck process should be started.
    /// If the document is null or does not belong to a cargo workspace all flycheck processes will be started.
    textDocument: lc.TextDocumentIdentifier | null;
}
```

--------------------------------

### TestState Type

Source: https://github.com/rust-lang/rust-analyzer/blob/master/docs/book/src/contributing/lsp-extensions.md

Defines the possible states for a test, including 'passed', 'failed' (with an error message), 'started', 'enqueued', and 'skipped'.

```typescript
type TestState = { tag: "passed" }
    | {
        tag: "failed";
        // The standard error of the test, containing the panic message. Clients should
        // render it similar to a terminal, and e.g. handle ansi colors.
        message: string;
    }
    | { tag: "started" }
    | { tag: "enqueued" }
    | { tag: "skipped" };
```

--------------------------------

### Configure Extra Arguments for Runnables

Source: https://github.com/rust-lang/rust-analyzer/blob/master/docs/book/src/configuration_generated.md

Provide additional arguments to be passed to cargo for runnables such as tests or binaries. For example, '--release'.

```json
[]
```

--------------------------------

### Example of SnippetTextEdit Usage

Source: https://github.com/rust-lang/rust-analyzer/blob/master/docs/book/src/contributing/lsp-extensions.md

Demonstrates how a 'derive' code action transforms a struct definition by inserting a snippet with a placeholder for derive attributes.

```rust
struct S;
#[derive($0)] struct S;
```

--------------------------------

### Plain Text Listing Example

Source: https://github.com/rust-lang/rust-analyzer/blob/master/xtask/test_data/expected.md

This is a plain text listing, often used for displaying output or messages that do not require specific formatting.

```plaintext
This is a plain listing.
```

--------------------------------

### Inline Assembly

Source: https://github.com/rust-lang/rust-analyzer/blob/master/crates/ide/src/syntax_highlighting/test_data/highlight_strings.html

Demonstrates the use of core::arch::asm! for low-level register manipulation.

```rust
let i: u64 = 3;
let o: u64;
core::arch::asm!(
    "mov {0}, {1}",
    "add {0}, 5",
    out(reg) o,
    in(reg) i,
);
```

--------------------------------

### Configure rust-analyzer in Neovim

Source: https://github.com/rust-lang/rust-analyzer/blob/master/docs/book/src/other_editors.md

Uses the Neovim 0.11+ API to pass server settings and register autocommands for inlay hints and completion.

```lua
lua << EOF
-- You can pass LSP settings to the server:
vim.lsp.config("rust_analyzer", {
    settings = {
        ["rust-analyzer"] = {
            imports = {
                granularity = {
                    group = "module",
                },
                prefix = "self",
            },
            cargo = {
                buildScripts = {
                    enable = true,
                },
            },
            procMacro = {
                enable = true
            },
        },
    },
})

-- You can enable different LSP features
vim.api.nvim_create_autocmd("LspAttach", {
    callback = function(ev)
        local client = assert(vim.lsp.get_client_by_id(ev.data.client_id))
        -- Inlay hints display inferred types, etc.
        if client:supports_method("inlayHint/resolve") then
            vim.lsp.inlay_hint.enable(true, { bufnr = ev.buf })
        end
        -- Completion can be invoked via ctrl+x ctrl+o. It displays a list of
        -- names inferred from the context (e.g. method names, variables, etc.)
        if client:supports_method("textDocument/completion") then
            vim.lsp.completion.enable(true, client.id, ev.buf, {})
        end
    end,
})
EOF
```

--------------------------------

### Style inline code comments as sentences

Source: https://github.com/rust-lang/rust-analyzer/blob/master/docs/book/src/contributing/style.md

Inline comments should be written as proper sentences starting with a capital letter and ending with a period.

```rust
// GOOD

// Only simple single segment paths are allowed.
MergeBehavior::Last => {
    tree.use_tree_list().is_none() && tree.path().map(path_len) <= Some(1)
}

// BAD

// only simple single segment paths are allowed
MergeBehavior::Last => {
    tree.use_tree_list().is_none() && tree.path().map(path_len) <= Some(1)
}
```

--------------------------------

### Build with debug assertions

Source: https://github.com/rust-lang/rust-analyzer/blob/master/docs/book/src/contributing/debugging.md

Command to build the release binary with debug assertions enabled.

```bash
RUSTFLAGS='--cfg debug_assertions' cargo build --release
```

--------------------------------

### Enable Full Function Signature Completions

Source: https://github.com/rust-lang/rust-analyzer/blob/master/docs/book/src/configuration_generated.md

Shows full function or method signatures in completion documentation.

```rust
rust-analyzer.completion.fullFunctionSignatures.enable
```

--------------------------------

### Implement a Trait for a Struct in Rust

Source: https://github.com/rust-lang/rust-analyzer/blob/master/crates/ide/src/syntax_highlighting/test_data/highlight_assoc_functions.html

This example shows how to implement the trait `t` for the struct `foo`, providing concrete implementations for the trait's methods.

```rust
impl t for foo {
    pub fn is_static() {}
    pub fn is_not_static(&self) {}
}

```