move ImportEnum attributes to a property

Author: Slowki

crates/backend/src/ast.rs

@@ -112,6 +112,8 @@ pub struct ImportEnum {
     pub variants: Vec<Ident>,
     /// The JS string values of the variants
     pub variant_values: Vec<String>,
+    /// Attributes to apply to the Rust enum
+    pub rust_attrs: Vec<syn::Attribute>,
 }
 
 #[cfg_attr(feature = "extra-traits", derive(Debug, PartialEq, Eq))]

crates/backend/src/codegen.rs

@@ -583,6 +583,7 @@ impl ToTokens for ast::ImportEnum {
         let expect_string = format!("attempted to convert invalid JSValue into {}", name);
         let variants = &self.variants;
         let variant_strings = &self.variant_values;
+        let attrs = &self.rust_attrs;
 
         let mut current_idx: usize = 0;
         let variant_indexes: Vec<Literal> = variants
@@ -609,7 +610,7 @@ impl ToTokens for ast::ImportEnum {
 
         (quote! {
             #[allow(bad_style)]
-            #[derive(Copy, Clone, Debug)]
+            #(#attrs)*
             #vis enum #name {
                 #(#variants = #variant_indexes_ref,)*
             }

crates/webidl/src/lib.rs

@@ -14,7 +14,9 @@ extern crate heck;
 #[macro_use]
 extern crate log;
 extern crate proc_macro2;
+#[macro_use]
 extern crate quote;
+#[macro_use]
 extern crate syn;
 extern crate wasm_bindgen_backend as backend;
 extern crate webidl;
@@ -640,6 +642,7 @@ impl<'a> WebidlParse<()> for webidl::ast::Enum {
                     .map(|v| rust_ident(v.to_camel_case().as_str()))
                     .collect(),
                 variant_values: self.variants.clone(),
+                rust_attrs: vec![parse_quote!(#[derive(Copy, Clone, PartialEq, Debug)])],
             }),
         });