errors: split to codes.go

Author: zchee

codes.go

@@ -0,0 +1,78 @@
+// Copyright 2020 The Go Language Server Authors
+// SPDX-License-Identifier: BSD-3-Clause
+
+package jsonrpc2
+
+// Code is an int64 error code as defined in the JSON-RPC spec.
+type Code int64
+
+// list of JSON-RPC error codes.
+const (
+	// ParseError is the invalid JSON was received by the server. An error occurred on the server while parsing the JSON text.
+	ParseError Code = -32700
+
+	// InvalidRequest is the JSON sent is not a valid Request object.
+	InvalidRequest Code = -32600
+
+	// MethodNotFound is the method does not exist / is not available.
+	MethodNotFound Code = -32601
+
+	// InvalidParams is the invalid method parameter(s).
+	InvalidParams Code = -32602
+
+	// InternalError is the internal JSON-RPC error.
+	InternalError Code = -32603
+
+	// ServerNotInitialized is the error of server not initialized.
+	ServerNotInitialized Code = -32002
+
+	// UnknownError should be used for all non coded errors.
+	UnknownError Code = -32001
+
+	// RequestCancelled is the cancellation error.
+	//
+	// Defined by the Language Server Protocol.
+	RequestCancelled Code = -32800
+
+	// ContentModified is the state change that invalidates the result of a request in execution.
+	//
+	// Defined by the Language Server Protocol.
+	ContentModified Code = -32801
+
+	// ServerOverloaded is returned when a message was refused due to a
+	// server being temporarily unable to accept any new messages.
+	ServerOverloaded Code = -32000
+
+	codeServerErrorStart Code = -32099
+	codeServerErrorEnd   Code = -32000
+)
+
+// list of JSON-RPC errors.
+var (
+	// ErrUnknown should be used for all non coded errors.
+	ErrUnknown = Error{Code: UnknownError, Message: "JSON-RPC unknown error"}
+
+	// ErrParse is used when invalid JSON was received by the server.
+	ErrParse = Error{Code: ParseError, Message: "JSON-RPC parse error"}
+
+	// ErrInvalidRequest is used when the JSON sent is not a valid Request object.
+	ErrInvalidRequest = Error{Code: InvalidRequest, Message: "JSON-RPC invalid request"}
+
+	// ErrMethodNotFound should be returned by the handler when the method does
+	// not exist / is not available.
+	ErrMethodNotFound = Error{Code: MethodNotFound, Message: "JSON-RPC method not found"}
+
+	// ErrInvalidParams should be returned by the handler when method
+	// parameter(s) were invalid.
+	ErrInvalidParams = Error{Code: InvalidParams, Message: "JSON-RPC invalid params"}
+
+	// ErrInternal is not currently returned but defined for completeness.
+	ErrInternal = Error{Code: InternalError, Message: "JSON-RPC internal error"}
+
+	// ErrServerOverloaded is returned when a message was refused due to a
+	// server being temporarily unable to accept any new messages.
+	ErrServerOverloaded = Error{Code: ServerOverloaded, Message: "JSON-RPC overloaded"}
+
+	// ErrIdleTimeout is returned when serving timed out waiting for new connections.
+	ErrIdleTimeout = constErr("timed out waiting for new connections")
+)

errors.go

@@ -10,49 +10,6 @@ import (
 	"fmt"
 )
 
-// Code represents a error's category.
-type Code int64
-
-const (
-	// ParseError is the invalid JSON was received by the server. An error occurred on the server while parsing the JSON text.
-	ParseError Code = -32700
-
-	// InvalidRequest is the JSON sent is not a valid Request object.
-	InvalidRequest Code = -32600
-
-	// MethodNotFound is the method does not exist / is not available.
-	MethodNotFound Code = -32601
-
-	// InvalidParams is the invalid method parameter(s).
-	InvalidParams Code = -32602
-
-	// InternalError is the internal JSON-RPC error.
-	InternalError Code = -32603
-
-	// ServerNotInitialized is the error of server not initialized.
-	ServerNotInitialized Code = -32002
-
-	// UnknownError should be used for all non coded errors.
-	UnknownError Code = -32001
-
-	// RequestCancelled is the cancellation error.
-	//
-	// Defined by the Language Server Protocol.
-	RequestCancelled Code = -32800
-
-	// ContentModified is the state change that invalidates the result of a request in execution.
-	//
-	// Defined by the Language Server Protocol.
-	ContentModified Code = -32801
-
-	// ServerOverloaded is returned when a message was refused due to a
-	// server being temporarily unable to accept any new messages.
-	ServerOverloaded Code = -32000
-
-	codeServerErrorStart Code = -32099
-	codeServerErrorEnd   Code = -32000
-)
-
 // Error represents a jsonrpc2 error.
 type Error struct {
 	// Code a number indicating the error type that occurred.
@@ -99,3 +56,7 @@ func Errorf(c Code, format string, args ...interface{}) *Error {
 
 	return e
 }
+
+type constErr string
+
+func (e constErr) Error() string { return string(e) }