From d61359449f373ceda4df43a4198d430550489c25 Mon Sep 17 00:00:00 2001
From: Jovan Gerodetti <jovan.gerodetti@titannano.de>
Date: Wed, 26 Jun 2024 13:40:00 +0200
Subject: [PATCH] Implement property hint string for bit flags (#41)

---
 derive/src/attribute_ops.rs | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/derive/src/attribute_ops.rs b/derive/src/attribute_ops.rs
index 8fd53b6..500aab6 100644
--- a/derive/src/attribute_ops.rs
+++ b/derive/src/attribute_ops.rs
@@ -101,14 +101,21 @@ impl FieldExportOps {
             result = Some((field, quote!(#property_hints::FILE), filters.join(",")));
         }
 
-        if self.flags.is_some() {
+        if let Some(list) = self.flags.as_ref() {
             let field = "flags";
 
             if let Some((active_field, _, _)) = result {
                 return Self::error(span, active_field, field);
             }
 
-            result = Some((field, quote!(#property_hints::FLAGS), String::new()));
+            let flags = list
+                .elems
+                .iter()
+                .map(String::from_expr)
+                .collect::<Result<Vec<_>, _>>()
+                .map_err(|err| err.write_errors())?;
+
+            result = Some((field, quote!(#property_hints::FLAGS), flags.join(",")));
         }
 
         if self.global_dir {