Fix span placement on type aliases

macro/src/expand.rs

@@ -1019,13 +1019,18 @@ fn expand_rust_function_shim_super(
 fn expand_type_alias(alias: &TypeAlias) -> TokenStream {
     let doc = &alias.doc;
     let attrs = &alias.attrs;
+    let visibility = alias.visibility;
+    let type_token = alias.type_token;
     let ident = &alias.name.rust;
     let generics = &alias.generics;
+    let eq_token = alias.eq_token;
     let ty = &alias.ty;
+    let semi_token = alias.semi_token;
+
     quote! {
         #doc
         #attrs
-        pub type #ident #generics = #ty;
+        #visibility #type_token #ident #generics #eq_token #ty #semi_token
     }
 }
 

syntax/mod.rs

@@ -123,6 +123,7 @@ pub struct TypeAlias {
     pub doc: Doc,
     pub derives: Vec<Derive>,
     pub attrs: OtherAttrs,
+    pub visibility: Token![pub],
     pub type_token: Token![type],
     pub name: Pair,
     pub generics: Lifetimes,

syntax/parse.rs

@@ -688,7 +688,7 @@ fn parse_extern_verbatim(
         if lookahead.peek(Token![=]) {
             // type Alias = crate::path::to::Type;
             parse_type_alias(
-                cx, attrs, type_token, ident, lifetimes, input, lang, namespace,
+                cx, attrs, visibility, type_token, ident, lifetimes, input, lang, namespace,
             )
         } else if lookahead.peek(Token![:]) || lookahead.peek(Token![;]) {
             // type Opaque: Bound2 + Bound2;
@@ -706,6 +706,7 @@ fn parse_extern_verbatim(
 fn parse_type_alias(
     cx: &mut Errors,
     attrs: Vec<Attribute>,
+    visibility: Visibility,
     type_token: Token![type],
     ident: Ident,
     generics: Lifetimes,
@@ -741,12 +742,19 @@ fn parse_type_alias(
         return Err(Error::new_spanned(span, msg));
     }
 
+    let visibility = Token![pub](match visibility {
+        Visibility::Public(vis) => vis.pub_token.span,
+        Visibility::Crate(vis) => vis.crate_token.span,
+        Visibility::Restricted(vis) => vis.pub_token.span,
+        Visibility::Inherited => ident.span(),
+    });
     let name = pair(namespace, &ident, cxx_name, rust_name);
 
     Ok(Api::TypeAlias(TypeAlias {
         doc,
         derives,
         attrs,
+        visibility,
         type_token,
         name,
         generics,

tests/ui/deny_missing_docs.stderr

@@ -35,12 +35,10 @@ error: missing documentation for a struct
    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 error: missing documentation for a type alias
- --> $DIR/deny_missing_docs.rs:9:1
-  |
-9 | #[cxx::bridge]
-  | ^^^^^^^^^^^^^^
-  |
-  = note: this error originates in an attribute macro (in Nightly builds, run with -Z macro-backtrace for more info)
+  --> $DIR/deny_missing_docs.rs:49:9
+   |
+49 |         pub type UndocumentedTypeAlias = crate::bindgen::UndocumentedTypeAlias;
+   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 error: missing documentation for a function
  --> $DIR/deny_missing_docs.rs:9:1