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-
-Prerequisites:
-
-In order to build the VS Code plugin, you need to have node.js and npm with
-a minimum version of 10 installed. Please refer to
-[node.js and npm documentation](https://nodejs.org) for installation instructions.
-
-You will also need the most recent version of VS Code: we don't try to
-maintain compatibility with older versions yet.
-
-The experimental VS Code plugin can then be built and installed by executing the
-following commands:
-
-```
-$ git clone https://github.com/rust-analyzer/rust-analyzer.git --depth 1
-$ cd rust-analyzer
-$ cargo install-code
-
-# for stdlib support
-$ rustup component add rust-src
-```
-
-This will run `cargo install --package ra_lsp_server` to install the server
-binary into `~/.cargo/bin`, and then will build and install plugin from
-`editors/code`. See
-[this](https://github.com/rust-analyzer/rust-analyzer/blob/0199572a3d06ff66eeae85a2d2c9762996f0d2d8/crates/tools/src/main.rs#L150)
-for details. The installation is expected to *just work*, if it doesn't, report
-bugs!
-
-It's better to remove existing Rust plugins to avoid interference.
-
-## Rust Analyzer Specific Features
-
-These features are implemented as extensions to the language server protocol.
-They are more experimental in nature and work only with VS Code.
-
-### Syntax highlighting
-
-It overrides built-in highlighting, and works only with a specific theme
-(zenburn). `rust-analyzer.highlightingOn` setting can be used to disable it.
-
-### Go to symbol in workspace <kbd>ctrl+t</kbd>
-
-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, excluding `stdlib`
-- `#foo#*` searches for `foo` function among dependencies.
-
-That is, `#` switches from "types" to all symbols, `*` switches from the current
-workspace to dependencies.
-
-### Commands <kbd>ctrl+shift+p</kbd>
-
-#### Show Rust Syntax Tree
-
-Shows the parse tree of the current file. It exists mostly for debugging
-rust-analyzer itself.
-
-#### Extend Selection
-
-Extends the current selection to the encompassing syntactic construct
-(expression, statement, item, module, etc). It works with multiple cursors. Do
-bind this command to a key, its super-useful! Expected to be upstreamed to LSP soonish:
-https://github.com/Microsoft/language-server-protocol/issues/613
-
-#### 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.
-
-#### Parent Module
-
-Navigates to the parent module of the current module.
-
-#### Join Lines
-
-Join selected lines into one, smartly fixing up whitespace and trailing commas.
-
-#### 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!
-
-
-### 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
-
-
-### Code Actions (Assists)
-
-These are triggered in a particular context via light bulb. We use custom code on
-the VS Code side to be able to position cursor.
-
-
-- Flip `,`
-
-```rust
-// before:
-fn foo(x: usize,<|> dim: (usize, usize))
-// after:
-fn foo(dim: (usize, usize), x: usize)
-```
-
-- Add `#[derive]`
-
-```rust
-// before:
-struct Foo {
-    <|>x: i32
-}
-// after:
-#[derive(<|>)]
-struct Foo {
-    x: i32
-}
-```
-
-- Add `impl`
-
-```rust
-// before:
-struct Foo<'a, T: Debug> {
-    <|>t: T
-}
-// after:
-struct Foo<'a, T: Debug> {
-    t: T
-}
-
-impl<'a, T: Debug> Foo<'a, T> {
-    <|>
-}
-```
-
-- Change visibility
-
-```rust
-// before:
-fn<|> foo() {}
-
-// after
-pub(crate) fn foo() {}
-```
-
-- Introduce variable:
-
-```rust
-// before:
-fn foo() {
-    foo(<|>1 + 1<|>);
-}
-
-// after:
-fn foo() {
-    let var_name = 1 + 1;
-    foo(var_name);
-}
-```
-
-- Replace if-let with match:
-
-```rust
-// before:
-impl VariantData {
-    pub fn is_struct(&self) -> bool {
-        if <|>let VariantData::Struct(..) = *self {
-            true
-        } else {
-            false
-        }
-    }
-}
-
-// after:
-impl VariantData {
-    pub fn is_struct(&self) -> bool {
-        <|>match *self {
-            VariantData::Struct(..) => true,
-            _ => false,
-        }
-    }
-}
-```
-
-- Split import
-
-```rust
-// before:
-use algo:<|>:visitor::{Visitor, visit};
-//after:
-use algo::{<|>visitor::{Visitor, visit}};
-```
-
-## LSP features
-
-* **Go to definition**: works correctly for local variables and some paths,
-  falls back to heuristic name matching for other things for the time being.
-
-* **Completion**: completes paths, including dependencies and standard library.
-  Does not handle glob imports and macros. Completes fields and inherent
-  methods.
-
-* **Outline** <kbd>alt+shift+o</kbd>
-
-* **Signature Info**
-
-* **Format document**. Formats the current file with rustfmt. Rustfmt must be
-  installed separately with `rustup component add rustfmt`.
-
-* **Hover** shows types of expressions and docstings
-
-* **Rename** works for local variables
-
-* **Code Lens** for running tests
-
-* **Folding**
-
-* **Diagnostics**
-  - missing module for `mod foo;` with a fix to create `foo.rs`.
-  - struct field shorthand
-  - unnecessary braces in use item
-
-
-## Performance
-
-Rust Analyzer is expected to be pretty fast. Specifically, the initial analysis
-of the project (i.e, when you first invoke completion or symbols) typically
-takes dozen of seconds at most. After that, everything is supposed to be more or
-less instant. However currently all analysis results are kept in memory, so
-memory usage is pretty high. Working with `rust-lang/rust` repo, for example,
-needs about 5 gigabytes of ram.