fix some outdated rustc module names

Author: matthiaskrgr

rls-rustc/src/ipc.rs

@@ -23,12 +23,12 @@ impl From<RpcChannel> for Client {
 pub struct IpcFileLoader(FileLoaderClient);
 
 impl IpcFileLoader {
-    pub fn into_boxed(self) -> Option<Box<dyn syntax::source_map::FileLoader + Send + Sync>> {
+    pub fn into_boxed(self) -> Option<Box<dyn rustc_span::source_map::FileLoader + Send + Sync>> {
         Some(Box::new(self))
     }
 }
 
-impl syntax::source_map::FileLoader for IpcFileLoader {
+impl rustc_span::source_map::FileLoader for IpcFileLoader {
     fn file_exists(&self, path: &Path) -> bool {
         self.0.file_exists(path.to_owned()).wait().unwrap()
     }

rls-rustc/src/lib.rs

@@ -135,8 +135,8 @@ impl Callbacks for ShimCalls {
             src_path,
             disambiguator: sess.local_crate_disambiguator().to_fingerprint().as_value(),
             edition: match sess.edition() {
-                syntax::edition::Edition::Edition2015 => Edition::Edition2015,
-                syntax::edition::Edition::Edition2018 => Edition::Edition2018,
+                rustc_span::edition::Edition::Edition2015 => Edition::Edition2015,
+                rustc_span::edition::Edition::Edition2018 => Edition::Edition2018,
             },
         };