change visit to fold for ty and reg

Author: ouz-a

compiler/stable_mir/src/fold.rs

@@ -12,13 +12,13 @@ use super::ty::{
 
 pub trait Folder: Sized {
     type Break;
-    fn visit_ty(&mut self, ty: &Ty) -> ControlFlow<Self::Break, Ty> {
+    fn fold_ty(&mut self, ty: &Ty) -> ControlFlow<Self::Break, Ty> {
         ty.super_fold(self)
     }
     fn fold_const(&mut self, c: &Const) -> ControlFlow<Self::Break, Const> {
         c.super_fold(self)
     }
-    fn visit_reg(&mut self, reg: &Region) -> ControlFlow<Self::Break, Region> {
+    fn fold_reg(&mut self, reg: &Region) -> ControlFlow<Self::Break, Region> {
         reg.super_fold(self)
     }
 }
@@ -32,7 +32,7 @@ pub trait Foldable: Sized + Clone {
 
 impl Foldable for Ty {
     fn fold<V: Folder>(&self, folder: &mut V) -> ControlFlow<V::Break, Self> {
-        folder.visit_ty(self)
+        folder.fold_ty(self)
     }
     fn super_fold<V: Folder>(&self, folder: &mut V) -> ControlFlow<V::Break, Self> {
         let mut kind = self.kind();
@@ -114,7 +114,7 @@ impl Foldable for GenericArgs {
 
 impl Foldable for Region {
     fn fold<V: Folder>(&self, folder: &mut V) -> ControlFlow<V::Break, Self> {
-        folder.visit_reg(self)
+        folder.fold_reg(self)
     }
     fn super_fold<V: Folder>(&self, folder: &mut V) -> ControlFlow<V::Break, Self> {
         let mut kind = self.kind.clone();
@@ -257,7 +257,7 @@ pub enum Never {}
 impl Folder for GenericArgs {
     type Break = Never;
 
-    fn visit_ty(&mut self, ty: &Ty) -> ControlFlow<Self::Break, Ty> {
+    fn fold_ty(&mut self, ty: &Ty) -> ControlFlow<Self::Break, Ty> {
         ControlFlow::Continue(match ty.kind() {
             TyKind::Param(p) => self[p],
             _ => *ty,