make fold.rs file

Author: youknowone

ast/asdl_rs.py

@@ -644,7 +644,6 @@ def gen_construction(self, header, fields, footer, depth):
 class FoldModuleVisitor(EmitVisitor):
     def visitModule(self, mod):
         depth = 0
-        self.emit("use crate::fold_helpers::Foldable;", depth)
         FoldTraitDefVisitor(self.file, self.type_info).visit(mod, depth)
         FoldImplVisitor(self.file, self.type_info).visit(mod, depth)
 

ast/src/fold_helpers.rs renamed to ast/src/fold.rs

@@ -1,4 +1,6 @@
-use crate::{builtin, fold::Fold, ConversionFlag};
+use super::generic::*;
+
+use crate::{builtin, ConversionFlag};
 
 pub trait Foldable<T, U> {
     type Mapped;
@@ -49,7 +51,7 @@ where
 
 macro_rules! simple_fold {
     ($($t:ty),+$(,)?) => {
-        $(impl<T, U> $crate::fold_helpers::Foldable<T, U> for $t {
+        $(impl<T, U> $crate::fold::Foldable<T, U> for $t {
             type Mapped = Self;
             #[inline]
             fn fold<F: Fold<T, TargetU = U> + ?Sized>(
@@ -70,3 +72,5 @@ simple_fold!(
     ConversionFlag,
     builtin::Constant
 );
+
+include!("gen/fold.rs");

ast/src/lib.rs

@@ -16,13 +16,7 @@ pub trait Node {
 }
 
 #[cfg(feature = "fold")]
-mod fold_helpers;
-#[cfg(feature = "fold")]
-pub mod fold {
-    use super::generic::*;
-
-    include!("gen/fold.rs");
-}
+pub mod fold;
 #[cfg(feature = "fold")]
 pub use fold::Fold;