2023-05-08
Rust Analyzer Options
type: ['null', 'string'] Custom
cargo runner extension ID.
anyOf:
{'type': 'null'}
{'type': 'array', 'items': {'type': 'object', 'properties': {'mask': {'type': 'string', 'description': 'Runnable name mask'}, 'env': {'type': 'object', 'description': 'Variables in form of { "key": "value"}'}}}}
{'type': 'object', 'description': 'Variables in form of { "key": "value"}'}Environment variables passed to the runnable launched using
Test or Debug lens or
rust-analyzer.run command.
type: ['null', 'string'] Path to
rust-analyzer executable (points to bundled binary by default).
| key | value |
|---|---|
| scope | machine-overridable |
type: ['null', 'object'] Extra
environment variables that will be passed to the rust-analyzer
executable. Useful for passing e.g. RA_LOG for
debugging.
| key | value |
|---|---|
| additionalProperties | {‘type’: [‘string’, ‘number’]} |
type: string
default: off Trace requests to the
rust-analyzer (this is usually overly verbose and not recommended for
regular users).
| value | description |
|---|---|
| off | No traces |
| messages | Error only |
| verbose | Full log |
| key | value |
|---|---|
| scope | window |
type: boolean
default: False Enable logging of VS
Code extensions itself.
type: string
default: auto Preferred debug
engine.
| value | description |
|---|---|
| auto | First try to use CodeLLDB, if it’s not installed try to use MS C++ tools. |
| vadimcn.vscode-lldb | Use CodeLLDB |
| ms-vscode.cpptools | Use MS C++ tools |
type: ['object', 'string']
default:
{
"/rustc/<id>": "${env:USERPROFILE}/.rustup/toolchains/<toolchain-id>/lib/rustlib/src/rust"
}Optional source file mappings passed to the debug engine.
| key | value |
|---|---|
| const | auto |
type: boolean
default: False Whether to open up the
Debug Panel on debugging start.
type: object
default: {} Optional settings passed
to the debug engine. Example:
{ "lldb": { "terminal":"external"} }
type: boolean
default: False Whether to restart the
server automatically when certain settings that require a restart are
changed.
type: boolean
default: True Whether to prefix
newlines after comments with the corresponding comment prefix.
type: boolean
default: False Whether to show the
main part of the rendered rustc output of a diagnostic message.
type: boolean
default: False Whether to use the
rustc error code.
type: ['null', 'array'] Sets the
command that rust-analyzer uses to generate
rust-project.json files. This command should only be used
if a build system like Buck or Bazel is also in use. The command must
accept files as arguments and return a rust-project.json over
stdout.
| key | value |
|---|---|
| items | {‘type’: ‘string’} |
type: boolean
default: True Whether to show a
notification for unlinked files asking the user to add the corresponding
Cargo.toml to the linked projects setting.
type: boolean
default: False Whether to insert
#[must_use] when generating as_ methods for enum
variants.
type: string
default: todo Placeholder expression
to use for missing expressions in assists.
| value | description |
|---|---|
| todo | Fill missing expressions with the
todo macro |
| default | Fill missing expressions with reasonable
defaults, new or default constructors. |
type: boolean
default: True Warm up caches on
project load.
type: number
default: 0 minimum:
0 maximum: 255 How
many worker threads to handle priming caches. The default 0
means to pick automatically.
type: boolean
default: True Automatically refresh
project info via cargo metadata on Cargo.toml
or .cargo/config.toml changes.
type: boolean
default: True Run build scripts
(build.rs) for more precise code analysis.
type: string
default: workspace Specifies the
working directory for running build scripts. - “workspace”: run build
scripts for a workspace in the workspace’s root directory. This is
incompatible with
#rust-analyzer.cargo.buildScripts.invocationStrategy# set
to once. - “root”: run build scripts in the project’s root
directory. This config only has an effect when
#rust-analyzer.cargo.buildScripts.overrideCommand# is
set.
| value | description |
|---|---|
| workspace | The command will be executed in the corresponding workspace root. |
| root | The command will be executed in the project root. |
type: string
default: per_workspace Specifies the
invocation strategy to use when running the build scripts command. If
per_workspace is set, the command will be executed for each
workspace. If once is set, the command will be executed
once. This config only has an effect when
#rust-analyzer.cargo.buildScripts.overrideCommand# is
set.
| value | description |
|---|---|
| per_workspace | The command will be executed for each workspace. |
| once | The command will be executed once. |
type: ['null', 'array'] Override
the command rust-analyzer uses to run build scripts and build procedural
macros. The command is required to output json and should therefore
include --message-format=json or a similar option.
By default, a cargo invocation will be constructed for the configured targets and features, with the following base command line:
cargo check --quiet --workspace --message-format=json --all-targets.
| key | value |
|---|---|
| items | {‘type’: ‘string’} |
type: boolean
default: True Use
RUSTC_WRAPPER=rust-analyzer when running build scripts to
avoid checking unnecessary things.
type: array
default: [] Extra arguments that are
passed to every cargo invocation.
| key | value |
|---|---|
| items | {‘type’: ‘string’} |
type: object
default: {} Extra environment
variables that will be set when running cargo, rustc or other commands
within the workspace. Useful for setting RUSTFLAGS.
default: []
anyOf:
{'type': 'string', 'enum': ['all'], 'enumDescriptions': ['Pass `--all-features` to cargo']}
{'type': 'array', 'items': {'type': 'string'}}List of features to activate.
Set this to "all" to pass --all-features to
cargo.
type: boolean
default: False Whether to pass
--no-default-features to cargo.
type: ['null', 'string']
default: discover Relative path to
the sysroot, or “discover” to try to automatically find it via “rustc
–print sysroot”.
Unsetting this disables sysroot loading.
This option does not take effect until rust-analyzer is restarted.
type: ['null', 'string'] Relative
path to the sysroot library sources. If left unset, this will default to
{cargo.sysroot}/lib/rustlib/src/rust/library.
This option does not take effect until rust-analyzer is restarted.
type: ['null', 'string']
Compilation target override (target triple).
type: array
default: ['core'] Unsets
#[cfg(test)] for the specified crates.
| key | value |
|---|---|
| items | {‘type’: ‘string’} |
type: boolean
default: True Run the check command
for diagnostics on save.
type: boolean
default: True Check all targets and
tests (--all-targets).
type: string
default: check Cargo command to use
for cargo check.
type: array
default: [] Extra arguments for
cargo check.
| key | value |
|---|---|
| items | {‘type’: ‘string’} |
type: object
default: {} Extra environment
variables that will be set when running cargo check.
Extends #rust-analyzer.cargo.extraEnv#.
anyOf:
{'type': 'string', 'enum': ['all'], 'enumDescriptions': ['Pass `--all-features` to cargo']}
{'type': 'array', 'items': {'type': 'string'}}
{'type': 'null'}List of features to activate. Defaults to
#rust-analyzer.cargo.features#.
Set to "all" to pass --all-features to
Cargo.
type: string
default: workspace Specifies the
working directory for running checks. - “workspace”: run checks for
workspaces in the corresponding workspaces’ root directories. This falls
back to “root” if
#rust-analyzer.cargo.checkOnSave.invocationStrategy# is set
to once. - “root”: run checks in the project’s root
directory. This config only has an effect when
#rust-analyzer.cargo.buildScripts.overrideCommand# is
set.
| value | description |
|---|---|
| workspace | The command will be executed in the corresponding workspace root. |
| root | The command will be executed in the project root. |
type: string
default: per_workspace Specifies the
invocation strategy to use when running the checkOnSave command. If
per_workspace is set, the command will be executed for each
workspace. If once is set, the command will be executed
once. This config only has an effect when
#rust-analyzer.cargo.buildScripts.overrideCommand# is
set.
| value | description |
|---|---|
| per_workspace | The command will be executed for each workspace. |
| once | The command will be executed once. |
type: ['null', 'boolean'] Whether
to pass --no-default-features to Cargo. Defaults to
#rust-analyzer.cargo.noDefaultFeatures#.
type: ['null', 'array'] Override
the command rust-analyzer uses instead of cargo check for
diagnostics on save. The command is required to output json and should
therefore include --message-format=json or a similar option
(if your client supports the colorDiagnosticOutput
experimental capability, you can use
--message-format=json-diagnostic-rendered-ansi).
If you’re changing this because you’re using some tool wrapping
Cargo, you might also want to change
#rust-analyzer.cargo.buildScripts.overrideCommand#.
If there are multiple linked projects, this command is invoked for
each of them, with the working directory being the project root (i.e.,
the folder containing the Cargo.toml).
An example command would be:
cargo check --workspace --message-format=json --all-targets.
| key | value |
|---|---|
| items | {‘type’: ‘string’} |
anyOf:
{'type': 'null'}
{'type': 'string'}
{'type': 'array', 'items': {'type': 'string'}}Check for specific targets. Defaults to
#rust-analyzer.cargo.target# if empty.
Can be a single target, e.g. "x86_64-unknown-linux-gnu"
or a list of targets, e.g.
["aarch64-apple-darwin", "x86_64-apple-darwin"].
Aliased as "checkOnSave.targets".
type: boolean
default: True Toggles the additional
completions that automatically add imports when completed. Note that
your client must specify the additionalTextEdits LSP client
capability to truly have this feature enabled.
type: boolean
default: True Toggles the additional
completions that automatically show method calls and field accesses with
self prefixed to them when inside a method.
type: string
default: fill_arguments Whether to
add parenthesis and argument snippets when completing function.
| value | description |
|---|---|
| fill_arguments | Add call parentheses and pre-fill arguments. |
| add_parentheses | Add call parentheses. |
| none | Do no snippet completions for callables. |
type: ['null', 'integer']
minimum: 0 Maximum number of
completions to return. If None, the limit is infinite.
type: boolean
default: True Whether to show postfix
snippets like dbg, if, not,
etc.
type: boolean
default: False Enables completions of
private items and fields that are defined in the current workspace even
if they are not visible at the current position.
type: object
default:
{
"Arc::new": {
"postfix": "arc",
"body": "Arc::new(${receiver})",
"requires": "std::sync::Arc",
"description": "Put the expression into an `Arc`",
"scope": "expr"
},
"Rc::new": {
"postfix": "rc",
"body": "Rc::new(${receiver})",
"requires": "std::rc::Rc",
"description": "Put the expression into an `Rc`",
"scope": "expr"
},
"Box::pin": {
"postfix": "pinbox",
"body": "Box::pin(${receiver})",
"requires": "std::boxed::Box",
"description": "Put the expression into a pinned `Box`",
"scope": "expr"
},
"Ok": {
"postfix": "ok",
"body": "Ok(${receiver})",
"description": "Wrap the expression in a `Result::Ok`",
"scope": "expr"
},
"Err": {
"postfix": "err",
"body": "Err(${receiver})",
"description": "Wrap the expression in a `Result::Err`",
"scope": "expr"
},
"Some": {
"postfix": "some",
"body": "Some(${receiver})",
"description": "Wrap the expression in an `Option::Some`",
"scope": "expr"
}
}Custom completion snippets.
type: array
default: [] List of rust-analyzer
diagnostics to disable.
| key | value |
|---|---|
| items | {‘type’: ‘string’} |
| uniqueItems | True |
type: boolean
default: True Whether to show native
rust-analyzer diagnostics.
type: boolean
default: False Whether to show
experimental rust-analyzer diagnostics that might have more false
positives than usual.
type: object
default: {} Map of prefixes to be
substituted when parsing diagnostic file paths. This should be the
reverse mapping of what is passed to rustc as
--remap-path-prefix.
type: array
default: [] List of warnings that
should be displayed with hint severity.
The warnings will be indicated by faded text or three dots in code
and will not show up in the Problems Panel.
| key | value |
|---|---|
| items | {‘type’: ‘string’} |
type: array
default: [] List of warnings that
should be displayed with info severity.
The warnings will be indicated by a blue squiggly underline in code
and a blue icon in the Problems Panel.
| key | value |
|---|---|
| items | {‘type’: ‘string’} |
type: array
default: [] These directories will be
ignored by rust-analyzer. They are relative to the workspace root, and
globs are not supported. You may also need to add the folders to Code’s
files.watcherExclude.
| key | value |
|---|---|
| items | {‘type’: ‘string’} |
type: string
default: client Controls file
watching implementation.
| value | description |
|---|---|
| client | Use the client (editor) to watch files for changes |
| server | Use server-side file watching |
type: boolean
default: True Enables highlighting of
related references while the cursor is on break,
loop, while, or for keywords.
type: boolean
default: True Enables highlighting of
all captures of a closure while the cursor is on the | or
move keyword of a closure.
type: boolean
default: True Enables highlighting of
all exit points while the cursor is on any return,
?, fn, or return type arrow
(->).
type: boolean
default: True Enables highlighting of
related references while the cursor is on any identifier.
type: boolean
default: True Enables highlighting of
all break points for a loop or block context while the cursor is on any
async or await keywords.
type: boolean
default: True Whether to show
Debug action. Only applies when
#rust-analyzer.hover.actions.enable# is set.
type: boolean
default: True Whether to show
HoverActions in Rust files.
type: boolean
default: True Whether to show
Go to Type Definition action. Only applies when
#rust-analyzer.hover.actions.enable# is set.
type: boolean
default: True Whether to show
Implementations action. Only applies when
#rust-analyzer.hover.actions.enable# is set.
type: boolean
default: False Whether to show
References action. Only applies when
#rust-analyzer.hover.actions.enable# is set.
type: boolean
default: True Whether to show
Run action. Only applies when
#rust-analyzer.hover.actions.enable# is set.
type: boolean
default: True Whether to show
documentation on hover.
type: boolean
default: True Whether to show keyword
hover popups. Only applies when
#rust-analyzer.hover.documentation.enable# is set.
type: boolean
default: True Use markdown syntax for
links on hover.
type: boolean
default: True Whether to show memory
layout data on hover.
type: boolean
default: False Whether to enforce the
import granularity setting for all files. If set to false rust-analyzer
will try to keep import styles consistent per file.
type: string
default: crate How imports should be
grouped into use statements.
| value | description |
|---|---|
| preserve | Do not change the granularity of any imports and preserve the original structure written by the developer. |
| crate | Merge imports from the same crate into a single use statement. Conversely, imports from different crates are split into separate statements. |
| module | Merge imports from the same module into a single use statement. Conversely, imports from different modules are split into separate statements. |
| item | Flatten imports so that each has its own use statement. |
type: boolean
default: True Group inserted imports
by the following
order. Groups are separated by newlines.
type: boolean
default: True Whether to allow import
insertion to merge new imports into single path glob imports like
use std::fmt::*;.
type: boolean
default: False Prefer to
unconditionally use imports of the core and alloc crate, over the std
crate.
type: string
default: plain The path structure for
newly inserted paths to use.
| value | description |
|---|---|
| plain | Insert import paths relative to the
current module, using up to one super prefix if the parent
module contains the requested item. |
| self | Insert import paths relative to the
current module, using up to one super prefix if the parent
module contains the requested item. Prefixes self in front
of the path if it starts with a module. |
| crate | Force import paths to be absolute by
always starting them with crate or the extern crate name
they come from. |
type: boolean
default: False Whether to show inlay
type hints for binding modes.
type: boolean
default: True Whether to show inlay
type hints for method chains.
type: boolean
default: True Whether to show inlay
hints after a closing } to indicate what item it belongs
to.
type: integer
default: 25 minimum:
0 Minimum number of lines required before the
} until the hint is shown (set to 0 or 1 to always show
them).
type: string
default: never Whether to show inlay
type hints for return types of closures.
| value | description |
|---|---|
| always | Always show type hints for return types of closures. |
| never | Never show type hints for return types of closures. |
| with_block | Only show type hints for return types of closures with blocks. |
type: string
default: impl_fn Closure notation in
type and chaining inlay hints.
| value | description |
|---|---|
| impl_fn | impl_fn:
impl FnMut(i32, u64) -> i8 |
| rust_analyzer | rust_analyzer:
|i32, u64| -> i8 |
| with_id | with_id:
{closure#14352}, where that id is the unique number of the
closure in r-a internals |
| hide | hide: Shows ...
for every closure type |
type: string
default: never Whether to show enum
variant discriminant hints.
| value | description |
|---|---|
| always | Always show all discriminant hints. |
| never | Never show discriminant hints. |
| fieldless | Only show discriminant hints on fieldless enum variants. |
type: string
default: never Whether to show inlay
hints for type adjustments.
| value | description |
|---|---|
| always | Always show all adjustment hints. |
| never | Never show adjustment hints. |
| reborrow | Only show auto borrow and dereference adjustment hints. |
type: boolean
default: False Whether to hide inlay
hints for type adjustments outside of unsafe blocks.
type: string
default: prefix Whether to show inlay
hints as postfix ops (.* instead of *,
etc).
| value | description |
|---|---|
| prefix | Always show adjustment hints as prefix
(*expr). |
| postfix | Always show adjustment hints as postfix
(expr.*). |
| prefer_prefix | Show prefix or postfix depending on which uses less parenthesis, preferring prefix. |
| prefer_postfix | Show prefix or postfix depending on which uses less parenthesis, preferring postfix. |
type: string
default: never Whether to show inlay
type hints for elided lifetimes in function signatures.
| value | description |
|---|---|
| always | Always show lifetime elision hints. |
| never | Never show lifetime elision hints. |
| skip_trivial | Only show lifetime elision hints if a return type is involved. |
type: boolean
default: False Whether to prefer
using parameter names as the name for elided lifetime hints if
possible.
type: ['null', 'integer']
default: 25 minimum:
0 Maximum length for inlay hints. Set to null to have
an unlimited length.
type: boolean
default: True Whether to show
function parameter name inlay hints at the call site.
type: string
default: never Whether to show inlay
hints for compiler inserted reborrows. This setting is deprecated in
favor of
#rust-analyzer.inlayHints.expressionAdjustmentHints.enable#.
| value | description |
|---|---|
| always | Always show reborrow hints. |
| never | Never show reborrow hints. |
| mutable | Only show mutable reborrow hints. |
type: boolean
default: True Whether to render
leading colons for type hints, and trailing colons for parameter
hints.
type: boolean
default: True Whether to show inlay
type hints for variables.
type: boolean
default: False Whether to hide inlay
type hints for let statements that initialize to a closure.
Only applies to closures with blocks, same as
#rust-analyzer.inlayHints.closureReturnTypeHints.enable#.
type: boolean
default: False Whether to hide inlay
type hints for constructors.
type: boolean
default: False Enables the
experimental support for interpreting tests.
type: boolean
default: True Join lines merges
consecutive declaration and initialization of an assignment.
type: boolean
default: True Join lines inserts else
between consecutive ifs.
type: boolean
default: True Join lines removes
trailing commas.
type: boolean
default: True Join lines unwraps
trivial blocks.
type: boolean
default: True Whether to show
Debug lens. Only applies when
#rust-analyzer.lens.enable# is set.
type: boolean
default: True Whether to show
CodeLens in Rust files.
type: boolean
default: True Internal config: use
custom client-side commands even when the client doesn’t set the
corresponding capability.
type: boolean
default: True Whether to show
Implementations lens. Only applies when
#rust-analyzer.lens.enable# is set.
type: string
default: above_name Where to render
annotations.
| value | description |
|---|---|
| above_name | Render annotations above the name of the item. |
| above_whole_item | Render annotations above the whole item, including documentation comments and attributes. |
type: boolean
default: False Whether to show
References lens for Struct, Enum, and Union. Only applies
when #rust-analyzer.lens.enable# is set.
type: boolean
default: False Whether to show
References lens for Enum Variants. Only applies when
#rust-analyzer.lens.enable# is set.
type: boolean
default: False Whether to show
Method References lens. Only applies when
#rust-analyzer.lens.enable# is set.
type: boolean
default: False Whether to show
References lens for Trait. Only applies when
#rust-analyzer.lens.enable# is set.
type: boolean
default: True Whether to show
Run lens. Only applies when
#rust-analyzer.lens.enable# is set.
type: array
default: [] Disable project
auto-discovery in favor of explicitly specified set of projects.
Elements must be paths pointing to Cargo.toml,
rust-project.json, or JSON objects in
rust-project.json format.
| key | value |
|---|---|
| items | {‘type’: [‘string’, ‘object’]} |
type: ['null', 'integer']
minimum: 0 Number of syntax trees
rust-analyzer keeps in memory. Defaults to 128.
type: object
default: {} Sets the LRU capacity of
the specified queries.
type: boolean
default: True Whether to show
can't find Cargo.toml error message.
type: ['null', 'integer']
minimum: 0 How many worker threads in
the main loop. The default null means to pick
automatically.
type: boolean
default: True Expand attribute
macros. Requires #rust-analyzer.procMacro.enable# to be
set.
type: boolean
default: True Enable support for
procedural macros, implies
#rust-analyzer.cargo.buildScripts.enable#.
type: object
default: {} These proc-macros will be
ignored when trying to expand them.
This config takes a map of crate names with the exported proc-macro names to ignore as values.
type: ['null', 'string'] Internal
config, path to proc-macro server executable.
type: boolean
default: False Exclude imports from
find-all-references.
type: ['null', 'string'] Command
to be executed instead of ‘cargo’ for runnables.
type: array
default: [] Additional arguments to
be passed to cargo for runnables such as tests or binaries. For example,
it may be --release.
| key | value |
|---|---|
| items | {‘type’: ‘string’} |
type: ['null', 'string'] Path to
the Cargo.toml of the rust compiler workspace, for usage in
rustc_private projects, or “discover” to try to automatically find it if
the rustc-dev component is installed.
Any project which uses rust-analyzer with the rustcPrivate crates
must set
[package.metadata.rust-analyzer] rustc_private=true to use
it.
This option does not take effect until rust-analyzer is restarted.
type: array
default: [] Additional arguments to
rustfmt.
| key | value |
|---|---|
| items | {‘type’: ‘string’} |
type: ['null', 'array'] Advanced
option, fully override the command rust-analyzer uses for formatting.
This should be the equivalent of rustfmt here, and not that
of cargo fmt. The file contents will be passed on the
standard input and the formatted result will be read from the standard
output.
| key | value |
|---|---|
| items | {‘type’: ‘string’} |
type: boolean
default: False Enables the use of
rustfmt’s unstable range formatting command for the
textDocument/rangeFormatting request. The rustfmt option is
unstable and only available on a nightly build.
type: boolean
default: True Inject additional
highlighting into doc comments.
When enabled, rust-analyzer will highlight rust source in doc comments as well as intra doc links.
type: boolean
default: True Use semantic tokens for
operators.
When disabled, rust-analyzer will emit semantic tokens only for operator tokens when they are tagged with modifiers.
type: boolean
default: False Use specialized
semantic tokens for operators.
When enabled, rust-analyzer will emit special token types for
operator tokens instead of the generic operator token
type.
type: boolean
default: False Use semantic tokens
for punctuation.
When disabled, rust-analyzer will emit semantic tokens only for punctuation tokens when they are tagged with modifiers or have a special role.
type: boolean
default: False When enabled,
rust-analyzer will emit a punctuation semantic token for the
! of macro calls.
type: boolean
default: False Use specialized
semantic tokens for punctuation.
When enabled, rust-analyzer will emit special token types for
punctuation tokens instead of the generic punctuation token
type.
type: boolean
default: True Use semantic tokens for
strings.
In some editors (e.g. vscode) semantic tokens override other highlighting grammars. By disabling semantic tokens for strings, other grammars can be used to highlight their contents.
type: string
default: full Show full signature of
the callable. Only shows parameters if disabled.
| value | description |
|---|---|
| full | Show the entire signature. |
| parameters | Show only the parameters. |
type: boolean
default: True Show documentation.
type: boolean
default: False Whether to insert
closing angle brackets when typing an opening angle bracket of a generic
argument list.
type: string
default: only_types Workspace symbol
search kind.
| value | description |
|---|---|
| only_types | Search for types only. |
| all_symbols | Search for all symbols kinds. |
type: integer
default: 128
minimum: 0 Limits the number of items
returned from a workspace symbol search (Defaults to 128). Some clients
like vs-code issue new searches on result filtering and don’t require
all results to be returned in the initial search. Other clients requires
all results upfront and might require a higher limit.
type: string
default: workspace Workspace symbol
search scope.
| value | description |
|---|---|
| workspace | Search in current workspace only. |
| workspace_and_dependencies | Search in current workspace and dependencies. |