1 files changed, 5 insertions, 1 deletions
diff --git a/src/lib.rs b/src/lib.rs
index 1f75023..6a1708f 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -409,7 +409,11 @@ impl TypeTransform {
                     quote! {#arg.map_err(|x| #err_inner)}
                 }
             }
-            _other => arg,
+            TypeTransform::Collection(inner) => {
+                let inner = inner.convert(quote!(x));
+                quote! {#arg.into_iter().map(|x| #inner).collect()}
+            }
+            TypeTransform::NoOp => arg,
         }
     }
 }