Use as_ref().map() rather than is_some().to_option()

Author: varkor

src/librustc/mir/mod.rs

@@ -305,7 +305,7 @@ impl<'tcx> Body<'tcx> {
     pub fn vars_iter<'a>(&'a self) -> impl Iterator<Item = Local> + 'a {
         (self.arg_count + 1..self.local_decls.len()).filter_map(move |index| {
             let local = Local::new(index);
-            self.local_decls[local].is_user_variable.is_some().to_option(local)
+            self.local_decls[local].is_user_variable.as_ref().map(|_| local)
         })
     }
 

src/librustc/session/mod.rs

@@ -825,7 +825,7 @@ impl Session {
     }
 
     pub fn incr_comp_session_dir_opt(&self) -> Option<cell::Ref<'_, PathBuf>> {
-        self.opts.incremental.is_some().to_option_with(|| self.incr_comp_session_dir())
+        self.opts.incremental.as_ref().map(|_| self.incr_comp_session_dir())
     }
 
     pub fn print_perf_stats(&self) {