From 8c270b0e35624b5e868d29c6297981cae53537b9 Mon Sep 17 00:00:00 2001
From: Jacob Lifshay <programmerjake@gmail.com>
Date: Mon, 23 Feb 2026 16:07:05 -0800
Subject: [PATCH] silence warning for enums with only one variant

---
 crates/fayalite-proc-macros-impl/src/hdl_enum.rs |  1 +
 crates/fayalite/tests/hdl_types.rs               | 10 ++++++++++
 2 files changed, 11 insertions(+)

diff --git a/crates/fayalite-proc-macros-impl/src/hdl_enum.rs b/crates/fayalite-proc-macros-impl/src/hdl_enum.rs
index 90838f0..ae0f8f4 100644
--- a/crates/fayalite-proc-macros-impl/src/hdl_enum.rs
+++ b/crates/fayalite-proc-macros-impl/src/hdl_enum.rs
@@ -888,6 +888,7 @@ impl ToTokens for ParsedEnum {
                         #(#sim_value_from_opaque_match_arms)*
                     }
                 }
+                #[allow(irrefutable_let_patterns)]
                 fn sim_value_clone_from_opaque(
                     &self,
                     value: &mut <Self as ::fayalite::ty::Type>::SimValue,
diff --git a/crates/fayalite/tests/hdl_types.rs b/crates/fayalite/tests/hdl_types.rs
index 5030282..cb3510e 100644
--- a/crates/fayalite/tests/hdl_types.rs
+++ b/crates/fayalite/tests/hdl_types.rs
@@ -244,3 +244,13 @@ pub struct MyTypeWithPrivateMembersWithArg<T> {
     pub(crate) b: MyPubCrateTypeWithArg<T>,
     pub c: T,
 }
+
+#[hdl(outline_generated)]
+pub enum EnumWithOnlyOneVariant {
+    A,
+}
+
+#[hdl(outline_generated)]
+pub enum EnumWithOnlyOneVariant2<T> {
+    A(T),
+}