From 20ea33f3321738e7c1b4cad7bdcaedcdb54dd0f0 Mon Sep 17 00:00:00 2001
From: jsmall-nvidia <jsmall@nvidia.com>
Date: Tue, 11 Apr 2023 10:18:18 -0400
Subject: Artifact simplification (#2781)

* #include an absolute path didn't work - because paths were taken to always be relative.

* WIP simplifying artifact interface.

* Use ContainedKind.

* Remove LazyCastableList.
Use ContainedKind for find.

* Remove ICastableList.

* Remove need for ICastableList.

* Remove IArtifactContainer.

* Small fixes.

* Small improvements around Artifact.

* Make explicit find is for *representations* that can cast.
Fix bug in handling casting in lookup.

* Made associated items artifacts too.

* Small fixes.

* Small improvements around writing a container.
---
 source/core/slang-castable.cpp | 70 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 70 insertions(+)
 create mode 100644 source/core/slang-castable.cpp

(limited to 'source/core/slang-castable.cpp')

diff --git a/source/core/slang-castable.cpp b/source/core/slang-castable.cpp
new file mode 100644
index 000000000..f3c6541dd
--- /dev/null
+++ b/source/core/slang-castable.cpp
@@ -0,0 +1,70 @@
+// slang-castable.cpp
+#include "slang-castable.h"
+
+namespace Slang {
+
+/* !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! CastableUtil !!!!!!!!!!!!!!!!!!!!!!!!!!! */
+
+/* static */ComPtr<ICastable> CastableUtil::getCastable(ISlangUnknown* unk)
+{
+    SLANG_ASSERT(unk);
+    ComPtr<ICastable> castable;
+    if (SLANG_SUCCEEDED(unk->queryInterface(SLANG_IID_PPV_ARGS(castable.writeRef()))))
+    {
+        SLANG_ASSERT(castable);
+    }
+    else
+    {
+        castable = new UnknownCastableAdapter(unk);
+    }
+    return castable;
+}
+
+/* !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! UnknownCastableAdapter !!!!!!!!!!!!!!!!!!!!!!!!!!! */
+
+void* UnknownCastableAdapter::castAs(const Guid& guid)
+{
+    if (auto intf = getInterface(guid))
+    {
+        return intf;
+    }
+    if (auto obj = getObject(guid))
+    {
+        return obj;
+    }
+
+    if (m_found && guid == m_foundGuid)
+    {
+        return m_found;
+    }
+
+    ComPtr<ISlangUnknown> cast;
+    if (SLANG_SUCCEEDED(m_contained->queryInterface(guid, (void**)cast.writeRef())) && cast)
+    {
+        // Save the interface in the cache
+        m_found = cast;
+        m_foundGuid = guid;
+
+        return cast;
+    }
+    return nullptr;
+}
+
+void* UnknownCastableAdapter::getInterface(const Guid& guid)
+{
+    if (guid == ISlangUnknown::getTypeGuid() ||
+        guid == ICastable::getTypeGuid() ||
+        guid == IUnknownCastableAdapter::getTypeGuid())
+    {
+        return static_cast<IUnknownCastableAdapter*>(this);
+    }
+    return nullptr;
+}
+
+void* UnknownCastableAdapter::getObject(const Guid& guid)
+{
+    SLANG_UNUSED(guid);
+    return nullptr;
+}
+
+} // namespace Slang
-- 
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