Implementation of JSON-RPC 2.0 (https://www.jsonrpc.org/specification) for use in the LSP server.

inductive Lean.JsonRpc.RequestID : Type

In JSON-RPC, each request from the client editor to the language server comes with a request id so that the corresponding response can be identified or cancelled.

• str (s : String) : RequestID
• num (n : JsonNumber) : RequestID
• null : RequestID

instance Lean.JsonRpc.instInhabitedRequestID : Inhabited RequestID

Equations

• Lean.JsonRpc.instInhabitedRequestID = { default := Lean.JsonRpc.RequestID.str default }

instance Lean.JsonRpc.instBEqRequestID : BEq RequestID

Equations

• Lean.JsonRpc.instBEqRequestID = { beq := Lean.JsonRpc.beqRequestID✝ }

instance Lean.JsonRpc.instOrdRequestID : Ord RequestID

Equations

• Lean.JsonRpc.instOrdRequestID = { compare := Lean.JsonRpc.ordRequestID✝ }

instance Lean.JsonRpc.instOfNatRequestID {n : Nat} : OfNat RequestID n

Equations

• Lean.JsonRpc.instOfNatRequestID = { ofNat := Lean.JsonRpc.RequestID.num (Lean.JsonNumber.fromNat n) }

instance Lean.JsonRpc.instToStringRequestID : ToString RequestID

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inductive Lean.JsonRpc.ErrorCode : Type

Error codes defined by JSON-RPC and LSP.

• parseError : ErrorCode

  Invalid JSON was received by the server. An error occurred on the server while parsing the JSON text.

• invalidRequest : ErrorCode

  The JSON sent is not a valid Request object.

• methodNotFound : ErrorCode

  The method does not exist / is not available.

• invalidParams : ErrorCode

  Invalid method parameter(s).

• internalError : ErrorCode

  Internal JSON-RPC error.

• serverNotInitialized : ErrorCode

  Error code indicating that a server received a notification or request before the server has received the initialize request.

• unknownErrorCode : ErrorCode
• contentModified : ErrorCode

  The server detected that the content of a document got modified outside normal conditions. A server should NOT send this error code if it detects a content change in it unprocessed messages. The result even computed on an older state might still be useful for the client.

  If a client decides that a result is not of any use anymore the client should cancel the request.

• requestCancelled : ErrorCode

  The client has canceled a request and a server as detected the cancel.

• rpcNeedsReconnect : ErrorCode
• workerExited : ErrorCode
• workerCrashed : ErrorCode

instance Lean.JsonRpc.instInhabitedErrorCode : Inhabited ErrorCode

Equations

• Lean.JsonRpc.instInhabitedErrorCode = { default := Lean.JsonRpc.ErrorCode.parseError }

instance Lean.JsonRpc.instBEqErrorCode : BEq ErrorCode

Equations

• Lean.JsonRpc.instBEqErrorCode = { beq := Lean.JsonRpc.beqErrorCode✝ }

instance Lean.JsonRpc.instFromJsonErrorCode : FromJson ErrorCode

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instance Lean.JsonRpc.instToJsonErrorCode : ToJson ErrorCode

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inductive Lean.JsonRpc.Message : Type

A JSON-RPC message.

Uses separate constructors for notifications and errors because client and server behavior is expected to be wildly different for both.

• request (id : RequestID) (method : String) (params? : Option Json.Structured) : Message

  A request message to describe a request between the client and the server. Every processed request must send a response back to the sender of the request.

• notification (method : String) (params? : Option Json.Structured) : Message

  A notification message. A processed notification message must not send a response back. They work like events.

• response (id : RequestID) (result : Json) : Message

  A Response Message sent as a result of a request.

• responseError (id : RequestID) (code : ErrorCode) (message : String) (data? : Option Json) : Message

  A non-successful response.

def Lean.JsonRpc.Batch : Type

Equations

• Lean.JsonRpc.Batch = Array Lean.JsonRpc.Message

structure Lean.JsonRpc.Request (α : Type u) : Type u

Generic version of Message.request.

A request message to describe a request between the client and the server. Every processed request must send a response back to the sender of the request.

• LSP
• JSON-RPC

• id : RequestID
• method : String
• param : α

instance Lean.JsonRpc.instInhabitedRequest {a✝ : Type u_1} [Inhabited a✝] : Inhabited (Request a✝)

Equations

• Lean.JsonRpc.instInhabitedRequest = { default := { id := default, method := default, param := default } }

instance Lean.JsonRpc.instBEqRequest {α✝ : Type u_1} [BEq α✝] : BEq (Request α✝)

Equations

• Lean.JsonRpc.instBEqRequest = { beq := Lean.JsonRpc.beqRequest✝ }

instance Lean.JsonRpc.instCoeOutRequestMessageOfToJson {α : Type u_1} [ToJson α] : CoeOut (Request α) Message

Equations

• Lean.JsonRpc.instCoeOutRequestMessageOfToJson = { coe := fun (r : Lean.JsonRpc.Request α) => Lean.JsonRpc.Message.request r.id r.method (Lean.Json.toStructured? r.param).toOption }

structure Lean.JsonRpc.Notification (α : Type u) : Type u

Generic version of Message.notification.

A notification message. A processed notification message must not send a response back. They work like events.

• JSON-RPC
• LSP.

• method : String
• param : α

instance Lean.JsonRpc.instInhabitedNotification {a✝ : Type u_1} [Inhabited a✝] : Inhabited (Notification a✝)

Equations

• Lean.JsonRpc.instInhabitedNotification = { default := { method := default, param := default } }

instance Lean.JsonRpc.instBEqNotification {α✝ : Type u_1} [BEq α✝] : BEq (Notification α✝)

Equations

• Lean.JsonRpc.instBEqNotification = { beq := Lean.JsonRpc.beqNotification✝ }

instance Lean.JsonRpc.instCoeOutNotificationMessageOfToJson {α : Type u_1} [ToJson α] : CoeOut (Notification α) Message

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structure Lean.JsonRpc.Response (α : Type u) : Type u

Generic version of Message.response.

A Response Message sent as a result of a request. If a request doesn’t provide a result value the receiver of a request still needs to return a response message to conform to the JSON-RPC specification. The result property of the ResponseMessage should be set to null in this case to signal a successful request.

References:

• JSON-RPC
• LSP

• id : RequestID
• result : α

instance Lean.JsonRpc.instInhabitedResponse {a✝ : Type u_1} [Inhabited a✝] : Inhabited (Response a✝)

Equations

• Lean.JsonRpc.instInhabitedResponse = { default := { id := default, result := default } }

instance Lean.JsonRpc.instBEqResponse {α✝ : Type u_1} [BEq α✝] : BEq (Response α✝)

Equations

• Lean.JsonRpc.instBEqResponse = { beq := Lean.JsonRpc.beqResponse✝ }

instance Lean.JsonRpc.instCoeOutResponseMessageOfToJson {α : Type u_1} [ToJson α] : CoeOut (Response α) Message

Equations

• Lean.JsonRpc.instCoeOutResponseMessageOfToJson = { coe := fun (r : Lean.JsonRpc.Response α) => Lean.JsonRpc.Message.response r.id (Lean.toJson r.result) }

structure Lean.JsonRpc.ResponseError (α : Type u) : Type u

Generic version of Message.responseError.

References:

• JSON-RPC
• LSP.

• id : RequestID
• code : ErrorCode
• message : String

  A string providing a short description of the error.

• data? : Option α

  A primitive or structured value that contains additional information about the error. Can be omitted.

instance Lean.JsonRpc.instInhabitedResponseError {a✝ : Type u_1} : Inhabited (ResponseError a✝)

Equations

• Lean.JsonRpc.instInhabitedResponseError = { default := { id := default, code := default, message := default, data? := default } }

instance Lean.JsonRpc.instBEqResponseError {α✝ : Type u_1} [BEq α✝] : BEq (ResponseError α✝)

Equations

• Lean.JsonRpc.instBEqResponseError = { beq := Lean.JsonRpc.beqResponseError✝ }

instance Lean.JsonRpc.instCoeOutResponseErrorMessageOfToJson {α : Type u_1} [ToJson α] : CoeOut (ResponseError α) Message

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instance Lean.JsonRpc.instCoeOutResponseErrorUnitMessage : CoeOut (ResponseError Unit) Message

Equations

• Lean.JsonRpc.instCoeOutResponseErrorUnitMessage = { coe := fun (r : Lean.JsonRpc.ResponseError Unit) => Lean.JsonRpc.Message.responseError r.id r.code r.message none }

instance Lean.JsonRpc.instCoeStringRequestID : Coe String RequestID

Equations

• Lean.JsonRpc.instCoeStringRequestID = { coe := Lean.JsonRpc.RequestID.str }

instance Lean.JsonRpc.instCoeJsonNumberRequestID : Coe JsonNumber RequestID

Equations

• Lean.JsonRpc.instCoeJsonNumberRequestID = { coe := Lean.JsonRpc.RequestID.num }

instance Lean.JsonRpc.instLTRequestID : LT RequestID

Equations

• Lean.JsonRpc.instLTRequestID = Lean.JsonRpc.RequestID.ltProp✝

instance Lean.JsonRpc.instDecidableLtRequestID (a b : RequestID) : Decidable (a < b)

Equations

• Lean.JsonRpc.instDecidableLtRequestID a b = inferInstanceAs (Decidable (Lean.JsonRpc.RequestID.lt✝ a b = true))

instance Lean.JsonRpc.instFromJsonRequestID : FromJson RequestID

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instance Lean.JsonRpc.instToJsonRequestID : ToJson RequestID

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instance Lean.JsonRpc.instToJsonMessage : ToJson Message

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instance Lean.JsonRpc.instFromJsonMessage : FromJson Message

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instance Lean.JsonRpc.instFromJsonNotification {α : Type} [FromJson α] : FromJson (Notification α)

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def IO.FS.Stream.readMessage (h : Stream) (nBytes : Nat) : IO Lean.JsonRpc.Message

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def IO.FS.Stream.readRequestAs (h : Stream) (nBytes : Nat) (expectedMethod : String) (α : Type) [Lean.FromJson α] : IO (Lean.JsonRpc.Request α)

Equations

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def IO.FS.Stream.readNotificationAs (h : Stream) (nBytes : Nat) (expectedMethod : String) (α : Type) [Lean.FromJson α] : IO (Lean.JsonRpc.Notification α)

Equations

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def IO.FS.Stream.readResponseAs (h : Stream) (nBytes : Nat) (expectedID : Lean.JsonRpc.RequestID) (α : Type) [Lean.FromJson α] : IO (Lean.JsonRpc.Response α)

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def IO.FS.Stream.writeMessage (h : Stream) (m : Lean.JsonRpc.Message) : IO Unit

Equations

• h.writeMessage m = h.writeJson (Lean.toJson m)

def IO.FS.Stream.writeRequest {α : Type u_1} [Lean.ToJson α] (h : Stream) (r : Lean.JsonRpc.Request α) : IO Unit

Equations

• h.writeRequest r = h.writeMessage (Lean.JsonRpc.Message.request r.id r.method (Lean.Json.toStructured? r.param).toOption)

def IO.FS.Stream.writeNotification {α : Type u_1} [Lean.ToJson α] (h : Stream) (n : Lean.JsonRpc.Notification α) : IO Unit

Equations

• h.writeNotification n = h.writeMessage (Lean.JsonRpc.Message.notification n.method (Lean.Json.toStructured? n.param).toOption)

def IO.FS.Stream.writeResponse {α : Type u_1} [Lean.ToJson α] (h : Stream) (r : Lean.JsonRpc.Response α) : IO Unit

Equations

• h.writeResponse r = h.writeMessage (Lean.JsonRpc.Message.response r.id (Lean.toJson r.result))

def IO.FS.Stream.writeResponseError (h : Stream) (e : Lean.JsonRpc.ResponseError Unit) : IO Unit

Equations

• h.writeResponseError e = h.writeMessage (Lean.JsonRpc.Message.responseError e.id e.code e.message none)

def IO.FS.Stream.writeResponseErrorWithData {α : Type u_1} [Lean.ToJson α] (h : Stream) (e : Lean.JsonRpc.ResponseError α) : IO Unit

Equations

• h.writeResponseErrorWithData e = h.writeMessage (Lean.JsonRpc.Message.responseError e.id e.code e.message (Option.map Lean.toJson e.data?))