Enum Message 

pub enum Message {
    Request(Request),
    Response(Response),
    Notification(Notification),
}

A JSON-RPC 2.0 message that can be a Request, Response, or Notification.

This enum uses #[serde(untagged)] for automatic discrimination based on the presence of specific fields:

• Request: Has id AND method fields
• Response: Has id AND (result OR error) fields
• Notification: Has method field but NO id field

Variant Order

The variant order is critical for correct deserialization:

1. Request (most specific - has both id and method)
2. Response (has id with result or error)
3. Notification (has method but no id)

Examples

use lsp_server_tokio::Message;

// Request discrimination
let json = r#"{"jsonrpc":"2.0","id":1,"method":"test"}"#;
let msg: Message = serde_json::from_str(json).unwrap();
assert!(msg.is_request());

// Response discrimination
let json = r#"{"jsonrpc":"2.0","id":1,"result":null}"#;
let msg: Message = serde_json::from_str(json).unwrap();
assert!(msg.is_response());

// Notification discrimination
let json = r#"{"jsonrpc":"2.0","method":"test"}"#;
let msg: Message = serde_json::from_str(json).unwrap();
assert!(msg.is_notification());

Variants

Request(Request)

A request message (has id and method).

Response(Response)

A response message (has id with result or error).

Notification(Notification)

A notification message (has method but no id).

Implementations

impl Message

pub fn is_request(&self) -> bool

Returns true if this is a Request message.

pub fn is_response(&self) -> bool

Returns true if this is a Response message.

pub fn is_notification(&self) -> bool

Returns true if this is a Notification message.

Trait Implementations

impl Clone for Message

fn clone(&self) -> Message

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Message

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for Message

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Encoder<Message> for LspCodec

type Error = Error

The type of encoding errors.

fn encode( &mut self, item: Message, dst: &mut BytesMut, ) -> Result<(), Self::Error>

Encodes a frame into the buffer provided.

impl Serialize for Message

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

where __S: Serializer,

Serialize this value into the given Serde serializer.