From e7df8538eb8f0ed06f0838d946bec8e9e0fe0985 Mon Sep 17 00:00:00 2001
From: Yong He <yonghe@outlook.com>
Date: Thu, 1 Dec 2022 18:55:43 -0800
Subject: Allow `no_diff` on `this` parameter. (#2543)

---
 source/slang/slang-syntax.cpp | 8 ++++++++
 1 file changed, 8 insertions(+)

(limited to 'source/slang/slang-syntax.cpp')

diff --git a/source/slang/slang-syntax.cpp b/source/slang/slang-syntax.cpp
index a79c48227..4e5db17c0 100644
--- a/source/slang/slang-syntax.cpp
+++ b/source/slang/slang-syntax.cpp
@@ -1368,6 +1368,14 @@ Module* getModule(Decl* decl)
     return moduleDecl->module;
 }
 
+Decl* getParentDecl(Decl* decl)
+{
+    decl = decl->parentDecl;
+    while (as<GenericDecl>(decl))
+        decl = decl->parentDecl;
+    return decl;
+}
+
 static const ImageFormatInfo kImageFormatInfos[] =
 {
 #define SLANG_IMAGE_FORMAT_INFO(TYPE, COUNT, SIZE) SLANG_SCALAR_TYPE_##TYPE, uint8_t(COUNT), uint8_t(SIZE)
-- 
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