From 5cdb4b0adb55cf2995e999135c5f3e9d6da70843 Mon Sep 17 00:00:00 2001
From: HampusM <hampus@hampusmat.com>
Date: Sat, 13 Jun 2026 18:32:07 +0200
Subject: feat(engine): add discriminant & fields layouts to enum reflection

---
 engine-macros/src/reflection/enum_impl.rs | 24 +++++++++++++++++++++++-
 1 file changed, 23 insertions(+), 1 deletion(-)

(limited to 'engine-macros/src/reflection/enum_impl.rs')

diff --git a/engine-macros/src/reflection/enum_impl.rs b/engine-macros/src/reflection/enum_impl.rs
index a01ed8b..14142bf 100644
--- a/engine-macros/src/reflection/enum_impl.rs
+++ b/engine-macros/src/reflection/enum_impl.rs
@@ -218,6 +218,26 @@ pub fn generate(input: syn::ItemEnum) -> proc_macro2::TokenStream
         &engine_crate_path,
     );
 
+    let discriminant_layout = if is_unit_only {
+        quote! {
+            std::alloc::Layout::new::<Self>()
+        }
+    } else {
+        quote! {
+            std::alloc::Layout::new::<#mod_name::Discriminant>()
+        }
+    };
+
+    let fields_layout = if is_unit_only {
+        quote! {
+            None
+        }
+    } else {
+        quote! {
+            Some(std::alloc::Layout::new::<#mod_name::Fields>())
+        }
+    };
+
     quote! {
         #[doc(hidden)]
         mod #mod_name {
@@ -232,7 +252,9 @@ pub fn generate(input: syn::ItemEnum) -> proc_macro2::TokenStream
                     #engine_crate_path::reflection::Type::Enum(
                         #engine_crate_path::reflection::Enum {
                             variants: &[#(#variants),*],
-                            is_unit_only: #is_unit_only
+                            is_unit_only: #is_unit_only,
+                            discriminant_layout: #discriminant_layout,
+                            fields_layout: #fields_layout
                         }
                     )
                 };
-- 
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