codegen: Allow to not derive Debug on enums.

Fixes #1899.

This code predated all the derive machinery, and always hardcoded its
derives.

We could avoid hard-coding the other traits, but those seem
usually-useful, so leave them there for backwards compat for now.

1 files changed, 11 insertions, 11 deletions

diff --git a/src/codegen/mod.rs b/src/codegen/mod.rs
index 44ad5cb2..91acf5b0 100644
--- a/src/codegen/mod.rs
+++ b/src/codegen/mod.rs
@@ -2840,17 +2840,17 @@ impl CodeGenerator for Enum {
         }
 
         if !variation.is_const() {
-            let mut derives =
-                vec!["Debug", "Copy", "Clone", "PartialEq", "Eq", "Hash"];
-
-            if item.can_derive_partialord(ctx) {
-                derives.push("PartialOrd");
-            }
-
-            if item.can_derive_ord(ctx) {
-                derives.push("Ord");
-            }
-
+            let mut derives = derives_of_item(item, ctx);
+            // For backwards compat, enums always derive Clone/Eq/PartialEq/Hash, even
+            // if we don't generate those by default.
+            derives.insert(
+                DerivableTraits::CLONE |
+                    DerivableTraits::COPY |
+                    DerivableTraits::HASH |
+                    DerivableTraits::PARTIAL_EQ |
+                    DerivableTraits::EQ,
+            );
+            let derives: Vec<_> = derives.into();
             attrs.push(attributes::derives(&derives));
         }