fix suggestions

Author: hellow554

clippy_lints/src/mutable_debug_assertion.rs

@@ -65,7 +65,9 @@ fn extract_call<'a, 'tcx>(cx: &'a LateContext<'a, 'tcx>, e: &'tcx Expr) -> Optio
                 if let ExprKind::Unary(UnOp::UnNot, ref condition) = droptmp.kind;
                 then {
                     // debug_assert
-                    return MutArgVisitor::go(cx, condition);
+                    let mut visitor = MutArgVisitor::new(cx);
+                    visitor.visit_expr(condition);
+                    return visitor.expr_span();
                 } else {
                     // debug_assert_{eq,ne}
                     if_chain! {
@@ -76,12 +78,16 @@ fn extract_call<'a, 'tcx>(cx: &'a LateContext<'a, 'tcx>, e: &'tcx Expr) -> Optio
                         if conditions.len() == 2;
                         then {
                             if let ExprKind::AddrOf(_, ref lhs) = conditions[0].kind {
-                                if let Some(span) = MutArgVisitor::go(cx, lhs) {
+                                let mut visitor = MutArgVisitor::new(cx);
+                                visitor.visit_expr(lhs);
+                                if let Some(span) = visitor.expr_span() {
                                     return Some(span);
                                 }
                             }
                             if let ExprKind::AddrOf(_, ref rhs) = conditions[1].kind {
-                                if let Some(span) = MutArgVisitor::go(cx, rhs) {
+                                let mut visitor = MutArgVisitor::new(cx);
+                                visitor.visit_expr(rhs);
+                                if let Some(span) = visitor.expr_span() {
                                     return Some(span);
                                 }
                             }
@@ -110,19 +116,13 @@ impl<'a, 'tcx> MutArgVisitor<'a, 'tcx> {
         }
     }
 
-    fn get_span(&self) -> Option<Span> {
+    fn expr_span(&self) -> Option<Span> {
         if self.found {
             self.expr_span
         } else {
             None
         }
     }
-
-    fn go(cx: &'a LateContext<'a, 'tcx>, start: &'tcx Expr) -> Option<Span> {
-        let mut s = Self::new(cx);
-        s.visit_expr(start);
-        s.get_span()
-    }
 }
 
 impl<'a, 'tcx> Visitor<'tcx> for MutArgVisitor<'a, 'tcx> {
@@ -150,6 +150,6 @@ impl<'a, 'tcx> Visitor<'tcx> for MutArgVisitor<'a, 'tcx> {
     }
 
     fn nested_visit_map<'this>(&'this mut self) -> NestedVisitorMap<'this, 'tcx> {
-        NestedVisitorMap::All(&self.cx.tcx.hir())
+        NestedVisitorMap::OnlyBodies(&self.cx.tcx.hir())
     }
 }