commit 890083d64fc0ee2ccf298be549827e9c0a975628
author Bryan Henry <bryanhenry@google.com> Sun Sep 13 10:34:31 2020 -0700
committer Bryan Henry <bryanhenry@google.com> Fri Oct 02 11:36:33 2020 -0700
tree 7dc0fa87ba8f4bdab2820e9157ba3577360ed48b
parent f2fbac79ab6d2880929a3cdc8e021e53b01ee7e1

Preserve docs on aliases

macro/src/expand.rs

diff --git a/macro/src/expand.rs b/macro/src/expand.rs
index 955ad5f..c35044b 100644
--- a/macro/src/expand.rs
+++ b/macro/src/expand.rs
@@ -657,9 +657,11 @@
 }
 
 fn expand_type_alias(alias: &TypeAlias) -> TokenStream {
+    let doc = &alias.doc;
     let ident = &alias.ident;
     let ty = &alias.ty;
     quote! {
+        #doc
         pub type #ident = #ty;
     }
 }

syntax/mod.rs

diff --git a/syntax/mod.rs b/syntax/mod.rs
index f52a582..8ef3c8b 100644
--- a/syntax/mod.rs
+++ b/syntax/mod.rs
@@ -79,6 +79,7 @@
 }
 
 pub struct TypeAlias {
+    pub doc: Doc,
     pub type_token: Token![type],
     pub ident: Ident,
     pub eq_token: Token![=],

syntax/parse.rs

diff --git a/syntax/parse.rs b/syntax/parse.rs
index 3ac5304..c1c565f 100644
--- a/syntax/parse.rs
+++ b/syntax/parse.rs
@@ -396,9 +396,10 @@
         let eq_token: Token![=] = input.parse()?;
         let ty: RustType = input.parse()?;
         let semi_token: Token![;] = input.parse()?;
-        attrs::parse_doc(cx, &attrs);
+        let doc = attrs::parse_doc(cx, &attrs);
 
         Ok(TypeAlias {
+            doc,
             type_token,
             ident,
             eq_token,