fix custom method error

src/custom_request.rs

@@ -1,8 +1,12 @@
+use std::future;
+use std::sync::Arc;
 use serde::Deserialize;
 use serde_json::{json, Value};
 use tower_lsp::jsonrpc::Result;
 use tower_lsp::lsp_types::*;
 
+use crate::server::Backend;
+
 #[derive(Debug, Deserialize)]
 pub struct CustomRequestParams {
     // 定义你需要的参数
@@ -14,8 +18,18 @@ pub struct CustomResponse {
     result: serde_json::Value
 }
 
+#[derive(Clone)]
+pub struct CustomRequest;
 
-pub async fn customRequest() -> Result<i32> {
+impl <'a>tower_lsp::jsonrpc::Method<&'a Arc<Backend>, (), Result<i32>> for CustomRequest {
+    type Future = future::Ready<Result<i32>>;
+
+    fn invoke(&self, _server: &'a Arc<Backend>, _params: ()) -> Self::Future {
+        future::ready(customRequest())
+    }
+}
+
+pub fn customRequest() -> Result<i32> {
     // let command = params[0].clone();
     // let message = String::from("receive command: ") + &command;
 

src/main.rs

@@ -1,6 +1,6 @@
 #![recursion_limit = "256"]
 
-use custom_request::customRequest;
+use custom_request::CustomRequest;
 use log::info;
 use std::sync::Arc;
 use structopt::StructOpt;
@@ -36,7 +36,7 @@ async fn main() {
     // let (service, socket) = LspService::new(|client| Arc::new(Backend::new(client, log_handle)));
 
     let (service, socket) = LspService::build(|client| Arc::new(Backend::new(client, log_handle)))
-        .custom_method("custom/request", customRequest)
+        .custom_method("custom/request", CustomRequest)
         .finish();
 
     Server::new(stdin, stdout, socket)