Preserve name in DeclRefExpr for correct highlighitng of `This`. (#4980)

* Preserve name in DeclRefExpr for correct highlighitng of `This`.

* Fix test.

1 files changed, 2 insertions, 2 deletions

diff --git a/source/slang/slang-check-decl.cpp b/source/slang/slang-check-decl.cpp
index 1dc81e861..ec59469d3 100644
--- a/source/slang/slang-check-decl.cpp
+++ b/source/slang/slang-check-decl.cpp
@@ -1991,7 +1991,7 @@ namespace Slang
         {
             auto* invoke = visitor->getASTBuilder()->create<InvokeExpr>();
             auto member = visitor->getASTBuilder()->getMemberDeclRef(declRefType->getDeclRef(), defaultCtor);
-            invoke->functionExpr = visitor->ConstructDeclRefExpr(member, nullptr, defaultCtor->loc, nullptr);
+            invoke->functionExpr = visitor->ConstructDeclRefExpr(member, nullptr, defaultCtor->getName(), defaultCtor->loc, nullptr);
             return invoke;
         }
         else
@@ -10103,7 +10103,7 @@ namespace Slang
         // aggregate type, we want to form a full declref with default arguments.
         declRef = createDefaultSubstitutionsIfNeeded(astBuilder, visitor, declRef);
 
-        auto declRefExpr = visitor->ConstructDeclRefExpr(declRef, nullptr, derivativeOfAttr->loc, nullptr);
+        auto declRefExpr = visitor->ConstructDeclRefExpr(declRef, nullptr, declRef.getName(), derivativeOfAttr->loc, nullptr);
         declRefExpr->type.type = nullptr;
         derivativeAttr->args.add(declRefExpr);
         derivativeAttr->funcExpr = declRefExpr;