Mark all serde attributes as used

2026-04-23 02:28:00 +00:00 · 2016-09-26 23:17:43 -07:00
parent 8e77960e3a
commit 8ee8c07090
1 changed files with 14 additions and 0 deletions
@@ -140,6 +140,20 @@ macro_rules! shim {
                }
            };

+            use syntax::{attr, ast, visit};
+            struct MarkSerdeAttributesUsed;
+            impl visit::Visitor for MarkSerdeAttributesUsed {
+                fn visit_attribute(&mut self, attr: &ast::Attribute) {
+                    match attr.node.value.node {
+                        ast::MetaItemKind::List(ref name, _) if name == "serde" => {
+                            attr::mark_used(attr);
+                        }
+                        _ => {}
+                    }
+                }
+            }
+            visit::walk_item(&mut MarkSerdeAttributesUsed, item);
+
            use syntax::print::pprust;
            let s = pprust::item_to_string(item);