From 78f72b3bf5aca16f8f3c5fd14c14eb0dae6e0604 Mon Sep 17 00:00:00 2001
From: Liam <byteslice@airmail.cc>
Date: Tue, 30 Jan 2024 02:18:48 -0500
Subject: cmif_serialization: enforce const for references

---
 src/core/hle/service/cmif_serialization.h | 6 ++++++
 1 file changed, 6 insertions(+)

(limited to 'src/core/hle/service/cmif_serialization.h')

diff --git a/src/core/hle/service/cmif_serialization.h b/src/core/hle/service/cmif_serialization.h
index 315475e71..e985fe317 100644
--- a/src/core/hle/service/cmif_serialization.h
+++ b/src/core/hle/service/cmif_serialization.h
@@ -115,6 +115,11 @@ struct ArgumentTraits {
     static constexpr ArgumentType Type = ArgumentType::InData;
 };
 
+template <typename... Ts>
+consteval bool ConstIfReference() {
+    return ((!std::is_reference_v<Ts> || std::is_const_v<std::remove_reference_t<Ts>>) && ... && true);
+}
+
 struct RequestLayout {
     u32 copy_handle_count;
     u32 move_handle_count;
@@ -435,6 +440,7 @@ void CmifReplyWrapImpl(HLERequestContext& ctx, T& t, Result (T::*f)(A...)) {
     }
     const bool is_domain = Domain ? ctx.GetManager()->IsDomain() : false;
 
+    static_assert(ConstIfReference<A...>(), "Arguments taken by reference must be const");
     using MethodArguments = std::tuple<std::remove_cvref_t<A>...>;
 
     OutTemporaryBuffers buffers{};
-- 
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