bug fixes to get falcor example shader code to compile.

1. prevent cyclic lookups when an interface inherits transitively from itself.
2. in `createGlobalGenericParamSubstitution`, create a default substitution for the base type declref before using it to lookup the witness table.

1 files changed, 2 insertions, 1 deletions

diff --git a/source/slang/syntax.h b/source/slang/syntax.h
index 93e421977..b37301dec 100644
--- a/source/slang/syntax.h
+++ b/source/slang/syntax.h
@@ -969,6 +969,8 @@ namespace Slang
         // used at all, to avoid allocation.
         List<LookupResultItem> items;
 
+        HashSet<DeclRef<ContainerDecl>>      lookedupDecls;
+
         // Was at least one result found?
         bool isValid() const { return item.declRef.getDecl() != nullptr; }
 
@@ -1009,7 +1011,6 @@ namespace Slang
     struct LookupRequest
     {
         SemanticsVisitor*   semantics   = nullptr;
-
         RefPtr<Scope>       scope       = nullptr;
         RefPtr<Scope>       endScope    = nullptr;