Try to be more robust against un-checked types during lowering, etc.

- Try to handle `ErrorType` gracefully when computing type layouts

- When outputting a `TypeExp`, if the type part is errorneous (or missing), try to use the expression part

- Make sure to lower the expressions side of a `TypeExp` during lowering

1 files changed, 3 insertions, 0 deletions

diff --git a/source/slang/type-layout.h b/source/slang/type-layout.h
index 262a8c3b1..1a63a4883 100644
--- a/source/slang/type-layout.h
+++ b/source/slang/type-layout.h
@@ -415,6 +415,9 @@ enum class ShaderParameterKind
     InputRenderTarget,
 
     SamplerState,
+
+    Image,
+    MutableImage,
 };
 
 struct SimpleLayoutRulesImpl