Only allow #[serde(default)]` on structs

2026-04-25 20:57:55 +00:00 · 2017-02-21 00:15:00 +01:00
parent 9444db5f19
commit 7bee779514
3 changed files with 24 additions and 1 deletions
@@ -167,7 +167,14 @@ impl Item {

                    // Parse `#[serde(default)]`
                    MetaItem(Word(ref name)) if name == "default" => {
-                        default.set_true();
+                        match item.body {
+                            syn::Body::Struct(_) => {
+                                default.set_true();
+                            }
+                            _ => {
+                                cx.error("#[serde(default)] can only be used on structs")
+                            }
+                        }
                    }

                    // Parse `#[serde(bound="D: Serialize")]`