Enum DaemonRequest 

pub enum DaemonRequest {
    Initialize(InitializeRequest),
    LspCall {
        client_id: i64,
        method: String,
        params: Value,
    },
    GetDiagnostics {
        client_id: i64,
        uri: Option<Uri>,
    },
    QueueDiagnosticRefresh {
        client_id: i64,
        uri: Uri,
    },
    Disconnect,
    Ping,
}

Messages sent from an LspClient to the LspDaemon.

The daemon protocol uses length-prefixed JSON frames over a Unix domain socket. Each frame is a 4-byte big-endian length prefix followed by a JSON-serialized DaemonRequest or DaemonResponse. The maximum frame size is MAX_MESSAGE_SIZE (16 MB).

Request lifecycle

Client                          Daemon
  ── Initialize ──────────────►
  ◄─────────────── Initialized ─
  ── LspCall ─────────────────►
  ◄──────────────── LspResult ──
  ── GetDiagnostics ──────────►
  ◄──────────────── LspResult ──
  ── Disconnect ──────────────►

Variants

• Initialize – Handshake that specifies the workspace root and language. Must be the first message. Contains an InitializeRequest.
• LspCall – Forward an LSP method call to the language server. Each call carries a client_id for response correlation.
• GetDiagnostics – Retrieve cached diagnostics. Pass uri: None to get diagnostics for all files in the workspace.
• QueueDiagnosticRefresh – Ask the daemon to re-check a file and update its diagnostics cache.
• Disconnect – Graceful client disconnect.
• Ping – Keepalive check; the daemon responds with DaemonResponse::Pong.

Response types

DaemonResponse variants:

• Initialized – The handshake succeeded.
• Pong – Reply to Ping.
• LspResult – The result of an LspCall or GetDiagnostics, containing either a JSON Value or an LspErrorResponse.
• Error – A ProtocolError for protocol-level failures.

Helper function

extract_document_uri extracts the target file URI from an LSP request’s params, used by the daemon to auto-open documents before forwarding requests.

Variants

Initialize(InitializeRequest)

LspCall

Fields

client_id: i64

method: String

params: Value

GetDiagnostics

Fields

client_id: i64

uri: Option<Uri>

If None, return all cached diagnostics for the workspace

QueueDiagnosticRefresh

Fields

client_id: i64

uri: Uri

Disconnect

Ping

Trait Implementations

impl Clone for DaemonRequest

fn clone(&self) -> DaemonRequest

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for DaemonRequest

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for DaemonRequest

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for DaemonRequest

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.