1 files changed, 23 insertions, 0 deletions
diff --git a/mingling_macros/src/func/program_fallback_gen.rs b/mingling_macros/src/func/program_fallback_gen.rs
new file mode 100644
index 0000000..3d095e5
--- /dev/null
+++ b/mingling_macros/src/func/program_fallback_gen.rs
@@ -0,0 +1,23 @@
+use proc_macro::TokenStream;
+use quote::quote;
+
+pub(crate) fn program_fallback_gen_impl(_input: TokenStream) -> TokenStream {
+    #[cfg(feature = "structural_renderer")]
+    let pack_empty = quote! {
+        #[derive(::serde::Serialize, ::mingling::StructuralData, ::mingling::Grouped, Default)]
+        pub struct ResultEmpty;
+    };
+
+    #[cfg(not(feature = "structural_renderer"))]
+    let pack_empty = quote! {
+        #[derive(::mingling::Grouped, Default)]
+        pub struct ResultEmpty;
+    };
+
+    let expanded = quote! {
+        ::mingling::macros::pack!(ErrorRendererNotFound = String);
+        ::mingling::macros::pack!(ErrorDispatcherNotFound = Vec<String>);
+        #pack_empty
+    };
+    TokenStream::from(expanded)
+}