From b7d318f48db2cb83a41d665f1727ae93fc555124 Mon Sep 17 00:00:00 2001
From: Yong He <yonghe@outlook.com>
Date: Thu, 28 Sep 2023 18:07:40 -0700
Subject: Support `constref` parameters passing. (#3249)

* Support `constref` parameters passing.

* Fix.

* Fix.

* Add test and diagnostic on mix use of __constref and no_diff.

* check for [constref] on differentiable member method.

---------

Co-authored-by: Yong He <yhe@nvidia.com>
---
 source/slang/slang-emit-c-like.cpp | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'source/slang/slang-emit-c-like.cpp')

diff --git a/source/slang/slang-emit-c-like.cpp b/source/slang/slang-emit-c-like.cpp
index d26893987..2559269d4 100644
--- a/source/slang/slang-emit-c-like.cpp
+++ b/source/slang/slang-emit-c-like.cpp
@@ -3235,6 +3235,10 @@ void CLikeSourceEmitter::emitParamTypeImpl(IRType* type, String const& name)
         m_writer->emit("inout ");
         type = refType->getValueType();
     }
+    else if (auto constRefType = as<IRConstRefType>(type))
+    {
+        type = constRefType->getValueType();
+    }
 
     emitType(type, name);
 }
-- 
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