fix: compile error when using enum in flutter

libs/flutter_rust_bridge_codegen/src/markers.rs

@@ -0,0 +1,39 @@
+use syn::*;
+
+/// Extract a path from marker `#[frb(mirror(path), ..)]`
+pub fn extract_mirror_marker(attrs: &[Attribute]) -> Option<Path> {
+    attrs
+        .iter()
+        .filter(|attr| attr.path.is_ident("frb"))
+        .find_map(|attr| match attr.parse_meta() {
+            Ok(Meta::List(MetaList { nested, .. })) => nested.iter().find_map(|meta| match meta {
+                NestedMeta::Meta(Meta::List(MetaList {
+                    path,
+                    nested: mirror,
+                    ..
+                })) if path.is_ident("mirror") && mirror.len() == 1 => {
+                    match mirror.first().unwrap() {
+                        NestedMeta::Meta(Meta::Path(path)) => Some(path.clone()),
+                        _ => None,
+                    }
+                }
+                _ => None,
+            }),
+            _ => None,
+        })
+}
+
+/// Checks if the `#[frb(non_final)]` attribute is present.
+pub fn has_non_final(attrs: &[Attribute]) -> bool {
+    attrs
+        .iter()
+        .filter(|attr| attr.path.is_ident("frb"))
+        .any(|attr| {
+            match attr.parse_meta() {
+            Ok(Meta::List(MetaList { nested, .. })) => nested.iter().any(|meta| {
+                matches!(meta, NestedMeta::Meta(Meta::Path(path)) if path.is_ident("non_final"))
+            }),
+            _ => false,
+        }
+        })
+}