Briefer ast traversal trait names

Author: dtolnay

codegen/README.md

@@ -2,8 +2,8 @@
 
 This is an internal (not published on crates.io) crate which is used to generate
 the files in the `gen/` directory of `syn`. It is used to ensure that the
-implementations for `Folder`, `Visitor`, and `VisitorMut` remain in sync with
-the actual AST.
+implementations for `Fold`, `Visit`, and `VisitMut` remain in sync with the
+actual AST.
 
 To run this program, run `cargo run` in this directory, and the `gen/` folder
 will be re-generated.

codegen/src/main.rs

@@ -1,5 +1,5 @@
-//! This crate automatically generates the definition of the `Visitor`,
-//! `VisitorMut`, and `Folder` traits in `syn` based on the `syn` source. It
+//! This crate automatically generates the definition of the `Visit`,
+//! `VisitMut`, and `Fold` traits in `syn` based on the `syn` source. It
 //! discovers structs and enums declared with the `ast_*` macros and generates
 //! the functions for those types.
 //!
@@ -727,15 +727,15 @@ mod codegen {
 
         state.visit_impl.push_str(&format!(
             "{features}\n\
-             pub fn visit_{under_name}<'ast, V: Visitor<'ast> + ?Sized>(\
+             pub fn visit_{under_name}<'ast, V: Visit<'ast> + ?Sized>(\
              _visitor: &mut V, _i: &'ast {ty}) {{\n",
             features = s.features,
             under_name = under_name,
             ty = s.ast.ident,
         ));
         state.visit_mut_impl.push_str(&format!(
             "{features}\n\
-             pub fn visit_{under_name}_mut<V: VisitorMut + ?Sized>(\
+             pub fn visit_{under_name}_mut<V: VisitMut + ?Sized>(\
              _visitor: &mut V, _i: &mut {ty}) {{\n",
             features = s.features,
             under_name = under_name,
@@ -744,7 +744,7 @@ mod codegen {
         let before_fold_impl_len = state.fold_impl.len();
         state.fold_impl.push_str(&format!(
             "{features}\n\
-             pub fn fold_{under_name}<V: Folder + ?Sized>(\
+             pub fn fold_{under_name}<V: Fold + ?Sized>(\
              _visitor: &mut V, _i: {ty}) -> {ty} {{\n",
             features = s.features,
             under_name = under_name,
@@ -1006,7 +1006,7 @@ macro_rules! full {
         "\
 // THIS FILE IS AUTOMATICALLY GENERATED; DO NOT EDIT
 
-//! A Folder represents an AST->AST fold; it accepts an AST piece,
+//! A Fold represents an AST->AST fold; it accepts an AST piece,
 //! and returns a piece of the same type.
 
 #![cfg_attr(rustfmt, rustfmt_skip)]
@@ -1026,23 +1026,23 @@ use gen::helper::fold::*;
 
 /// AST->AST fold.
 ///
-/// Each method of the Folder trait is a hook to be potentially overridden. Each
+/// Each method of the Fold trait is a hook to be potentially overridden. Each
 /// method's default implementation recursively visits the substructure of the
 /// input via the `walk` functions, which perform an \"identity fold\", that
 /// is, they return the same structure that they are given (for example the
 /// `fold_file` method by default calls `fold::walk_file`).
 ///
 /// If you want to ensure that your code handles every variant
 /// explicitly, you need to override each method.  (And you also need
-/// to monitor future changes to `Folder` in case a new method with a
+/// to monitor future changes to `Fold` in case a new method with a
 /// new default implementation gets introduced.)
-pub trait Folder {{
+pub trait Fold {{
 {fold_trait}
 }}
 
 macro_rules! fold_span_only {{
     ($f:ident : $t:ident) => {{
-        pub fn $f<V: Folder + ?Sized>(_visitor: &mut V, mut _i: $t) -> $t {{
+        pub fn $f<V: Fold + ?Sized>(_visitor: &mut V, mut _i: $t) -> $t {{
             _i.span = _visitor.fold_span(_i.span);
             _i
         }}
@@ -1096,16 +1096,16 @@ use gen::helper::visit::*;
 
 {full_macro}
 
-/// Each method of the Visitor trait is a hook to be potentially
+/// Each method of the Visit trait is a hook to be potentially
 /// overridden.  Each method's default implementation recursively visits
 /// the substructure of the input via the corresponding `walk` method;
 /// e.g. the `visit_mod` method by default calls `visit::walk_mod`.
 ///
 /// If you want to ensure that your code handles every variant
 /// explicitly, you need to override each method.  (And you also need
-/// to monitor future changes to `Visitor` in case a new method with a
+/// to monitor future changes to `Visit` in case a new method with a
 /// new default implementation gets introduced.)
-pub trait Visitor<'ast> {{
+pub trait Visit<'ast> {{
 {visit_trait}
 }}
 
@@ -1140,16 +1140,16 @@ use gen::helper::visit_mut::*;
 
 {full_macro}
 
-/// Each method of the VisitorMut trait is a hook to be potentially
+/// Each method of the VisitMut trait is a hook to be potentially
 /// overridden.  Each method's default implementation recursively visits
 /// the substructure of the input via the corresponding `walk` method;
 /// e.g. the `visit_mod` method by default calls `visit::walk_mod`.
 ///
 /// If you want to ensure that your code handles every variant
 /// explicitly, you need to override each method.  (And you also need
-/// to monitor future changes to `VisitorMut` in case a new method with a
+/// to monitor future changes to `VisitMut` in case a new method with a
 /// new default implementation gets introduced.)
-pub trait VisitorMut {{
+pub trait VisitMut {{
 {visit_mut_trait}
 }}