Always pass the visitor as the first argument to walk* functions

Author: oli-obk

clippy_lints/src/unnested_or_patterns.rs

@@ -121,7 +121,7 @@ fn remove_all_parens(pat: &mut P<Pat>) {
     struct Visitor;
     impl MutVisitor for Visitor {
         fn visit_pat(&mut self, pat: &mut P<Pat>) {
-            walk_pat(pat, self);
+            walk_pat(self, pat);
             let inner = match &mut pat.kind {
                 Paren(i) => mem::replace(&mut i.kind, Wild),
                 _ => return,
@@ -138,7 +138,7 @@ fn insert_necessary_parens(pat: &mut P<Pat>) {
     impl MutVisitor for Visitor {
         fn visit_pat(&mut self, pat: &mut P<Pat>) {
             use ast::BindingMode;
-            walk_pat(pat, self);
+            walk_pat(self, pat);
             let target = match &mut pat.kind {
                 // `i @ a | b`, `box a | b`, and `& mut? a | b`.
                 Ident(.., Some(p)) | Box(p) | Ref(p, _) if matches!(&p.kind, Or(ps) if ps.len() > 1) => p,
@@ -160,7 +160,7 @@ fn unnest_or_patterns(pat: &mut P<Pat>) -> bool {
     impl MutVisitor for Visitor {
         fn visit_pat(&mut self, p: &mut P<Pat>) {
             // This is a bottom up transformation, so recurse first.
-            walk_pat(p, self);
+            walk_pat(self, p);
 
             // Don't have an or-pattern? Just quit early on.
             let Or(alternatives) = &mut p.kind else { return };
@@ -189,7 +189,7 @@ fn unnest_or_patterns(pat: &mut P<Pat>) -> bool {
 
             // Deal with `Some(Some(0)) | Some(Some(1))`.
             if this_level_changed {
-                walk_pat(p, self);
+                walk_pat(self, p);
             }
         }
     }