From 765061a77bcf4fe6300721263cc9e0f25595488d Mon Sep 17 00:00:00 2001
From: Yong He <yonghe@outlook.com>
Date: Tue, 10 May 2022 19:42:48 -0700
Subject: Initial support for COM interface in host code. (#2230)

Co-authored-by: Yong He <yhe@nvidia.com>
Co-authored-by: Theresa Foley <10618364+tangent-vector@users.noreply.github.com>
---
 source/slang/slang-check-decl.cpp | 10 ++++++++++
 1 file changed, 10 insertions(+)

(limited to 'source/slang/slang-check-decl.cpp')

diff --git a/source/slang/slang-check-decl.cpp b/source/slang/slang-check-decl.cpp
index 3c654a48b..6c414b292 100644
--- a/source/slang/slang-check-decl.cpp
+++ b/source/slang/slang-check-decl.cpp
@@ -3232,6 +3232,16 @@ namespace Slang
 
             _validateCrossModuleInheritance(decl, inheritanceDecl);
         }
+
+        if (decl->findModifier<ComInterfaceAttribute>())
+        {
+            // `associatedtype` declaration is not allowed in a COM interface declaration.
+            for (auto associatedType : decl->getMembersOfType<AssocTypeDecl>())
+            {
+                getSink()->diagnose(
+                    associatedType, Diagnostics::associatedTypeNotAllowInComInterface);
+            }
+        }
     }
 
     void SemanticsDeclBasesVisitor::visitStructDecl(StructDecl* decl)
-- 
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