add document to XXXAnyHolder

CHANGELOG.md

@@ -21,6 +21,7 @@ In addition to original Keep-a-Changelog, we use following rules:
 - Remove `field` attr from enumerations. https://github.com/ricosjp/ruststep/pull/233
 - Recursive `get_owned` for select type without boxed variant. https://github.com/ricosjp/ruststep/pull/234
 - Hide `XXHolderVisitor` in document https://github.com/ricosjp/ruststep/pull/247
+- Add document to `XXAnyHolder`. https://github.com/ricosjp/ruststep/pull/248
 
 ### Fixed
 - Plural class names are converted as is. https://github.com/ricosjp/ruststep/pull/245

ruststep-derive/src/lib.rs

@@ -188,6 +188,7 @@ mod snapshot_tests {
         let out = espr::codegen::rust::rustfmt(tt.to_string());
 
         insta::assert_snapshot!(out, @r###"
+        #[doc = r" Auto-generated by `#[derive(Holder)]`"]
         #[derive(Clone, Debug, PartialEq)]
         pub enum S1Holder {
             A(Box<AHolder>),
@@ -301,6 +302,7 @@ mod snapshot_tests {
         let out = espr::codegen::rust::rustfmt(tt.to_string());
 
         insta::assert_snapshot!(out, @r###"
+        #[doc = r" Auto-generated by `#[derive(Holder)]`"]
         #[derive(Clone, Debug, PartialEq)]
         pub enum BaseAnyHolder {
             Base(Box<BaseHolder>),

ruststep-derive/src/select.rs

@@ -96,6 +96,7 @@ impl Input {
             ..
         } = self;
         quote! {
+            /// Auto-generated by `#[derive(Holder)]`
             #[derive(Clone, Debug, PartialEq)]
             pub enum #holder_ident {
                 #(#variants(#holder_types)),*