modify code

[rust.git] / clippy_lints / src / mut_mut.rs

diff --git a/clippy_lints/src/mut_mut.rs b/clippy_lints/src/mut_mut.rs
index 7c4cac29ba8e8c699b7a5cfdeea61678f0a477ba..cb16f00047a394b06b147151fd0244f9bde86274 100644 (file)
--- a/clippy_lints/src/mut_mut.rs
+++ b/clippy_lints/src/mut_mut.rs
@@ -3,7 +3,6 @@
 use rustc_hir as hir;
 use rustc_hir::intravisit;
 use rustc_lint::{LateContext, LateLintPass, LintContext};
-use rustc_middle::hir::map::Map;
 use rustc_middle::lint::in_external_macro;
 use rustc_middle::ty;
 use rustc_session::{declare_lint_pass, declare_tool_lint};
@@ -22,6 +21,7 @@
     /// # let mut y = 1;
     /// let x = &mut &mut y;
     /// ```
+    #[clippy::version = "pre 1.29.0"]
     pub MUT_MUT,
     pedantic,
     "usage of double-mut refs, e.g., `&mut &mut ...`"
@@ -46,8 +46,6 @@ pub struct MutVisitor<'a, 'tcx> {
 }
 
 impl<'a, 'tcx> intravisit::Visitor<'tcx> for MutVisitor<'a, 'tcx> {
-    type Map = Map<'tcx>;
-
     fn visit_expr(&mut self, expr: &'tcx hir::Expr<'_>) {
         if in_external_macro(self.cx.sess(), expr.span) {
             return;
@@ -113,7 +111,4 @@ fn visit_ty(&mut self, ty: &'tcx hir::Ty<'_>) {
 
         intravisit::walk_ty(self, ty);
     }
-    fn nested_visit_map(&mut self) -> intravisit::NestedVisitorMap<Self::Map> {
-        intravisit::NestedVisitorMap::None
-    }
 }