assume plain enum is Copy

Author: Centril

crates/bindings-macro/src/sats.rs

@@ -215,10 +215,12 @@ pub(crate) fn derive_satstype(ty: &SatsType<'_>) -> TokenStream {
         let mut generics = ty.generics.clone();
         add_type_bounds(&mut generics, &quote!(#krate::FilterableValue));
         let (impl_generics, ty_generics, where_clause) = generics.split_for_impl();
-        // As we don't have access to other `derive` attributes,
-        // we don't know if `Copy` was derived,
-        // so we won't impl for the owned type.
+        // Assume that the type is `Copy`, as most all-unit enums will be.
         let filterable_impl = quote! {
+            #[automatically_derived]
+            impl #impl_generics #krate::FilterableValue for #name #ty_generics #where_clause {
+                type Column = #name #ty_generics;
+            }
             #[automatically_derived]
             impl #impl_generics #krate::FilterableValue for &#name #ty_generics #where_clause {
                 type Column = #name #ty_generics;

crates/lib/src/filterable_value.rs

@@ -87,7 +87,7 @@ pub enum TermBound<T> {
 }
 impl<Bound: FilterableValue> TermBound<&Bound> {
     #[inline]
-    /// If `self` is [`TermBound::Range`], returns the `rend_idx` value for [`BTreeScanArgs`],
+    /// If `self` is [`TermBound::Range`], returns the `rend_idx` value for `IndexScanRangeArgs`,
     /// i.e. the index in `buf` of the first byte in the end range
     pub fn serialize_into(&self, buf: &mut Vec<u8>) -> Option<usize> {
         let (start, end) = match self {

modules/sdk-test/src/lib.rs

@@ -550,7 +550,7 @@ define_tables! {
 
 #[spacetimedb::reducer]
 fn update_pk_simple_enum(ctx: &ReducerContext, a: SimpleEnum, data: i32) -> anyhow::Result<()> {
-    let Some(mut o) = ctx.db.pk_simple_enum().a().find(&a) else {
+    let Some(mut o) = ctx.db.pk_simple_enum().a().find(a) else {
         return Err(anyhow!("row not found"));
     };
     o.data = data;