Reduce visibility

crates/rust-analyzer/src/main_loop.rs

@@ -1,9 +1,7 @@
 //! The main loop of `rust-analyzer` responsible for dispatching LSP
 //! requests/replies and notifications back to the client.
 use std::{
-    env,
-    error::Error,
-    fmt,
+    env, fmt,
     ops::Range,
     panic,
     sync::Arc,
@@ -28,31 +26,9 @@ use crate::{
     global_state::{file_id_to_url, GlobalState, GlobalStateSnapshot, Status},
     handlers, lsp_ext,
     request_metrics::RequestMetrics,
-    Result,
+    LspError, Result,
 };
 
-#[derive(Debug)]
-pub struct LspError {
-    pub code: i32,
-    pub message: String,
-}
-
-impl LspError {
-    pub const UNKNOWN_FILE: i32 = -32900;
-
-    pub fn new(code: i32, message: String) -> LspError {
-        LspError { code, message }
-    }
-}
-
-impl fmt::Display for LspError {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        write!(f, "Language Server request failed with {}. ({})", self.code, self.message)
-    }
-}
-
-impl Error for LspError {}
-
 pub fn main_loop(config: Config, connection: Connection) -> Result<()> {
     log::info!("initial config: {:#?}", config);
 
@@ -848,14 +824,7 @@ where
     let response = match result {
         Ok(resp) => Response::new_ok(id, &resp),
         Err(e) => match e.downcast::<LspError>() {
-            Ok(lsp_error) => {
-                if lsp_error.code == LspError::UNKNOWN_FILE {
-                    // Work-around for https://github.com/rust-analyzer/rust-analyzer/issues/1521
-                    Response::new_ok(id, ())
-                } else {
-                    Response::new_err(id, lsp_error.code, lsp_error.message)
-                }
-            }
+            Ok(lsp_error) => Response::new_err(id, lsp_error.code, lsp_error.message),
             Err(e) => {
                 if is_canceled(&e) {
                     Response::new_err(