review fixups

1 files changed, 4 insertions, 3 deletions

diff --git a/compiler/rustc_expand/src/proc_macro_server.rs b/compiler/rustc_expand/src/proc_macro_server.rs
index cc66eefac3e..af0b5639d61 100644
--- a/compiler/rustc_expand/src/proc_macro_server.rs
+++ b/compiler/rustc_expand/src/proc_macro_server.rs
@@ -498,12 +498,13 @@ impl server::TokenStream for Rustc<'_, '_> {
         }
         builder.build()
     }
-    fn into_iter(
+    fn into_trees(
         &mut self,
         stream: Self::TokenStream,
     ) -> Vec<TokenTree<Self::Group, Self::Punct, Self::Ident, Self::Literal>> {
-        // FIXME: This is a raw port of the previous approach, and can probably
-        // be optimized.
+        // FIXME: This is a raw port of the previous approach (which had a
+        // `TokenStreamIter` server-side object with a single `next` method),
+        // and can probably be optimized (for bulk conversion).
         let mut cursor = stream.into_trees();
         let mut stack = Vec::new();
         let mut tts = Vec::new();