[NF] Improve Expression.recordElement.

- Handle subscripted expressions properly in Expression.recordElement.

Author: perost

OMCompiler/Compiler/NFFrontEnd/NFExpression.mo

@@ -5254,6 +5254,13 @@ public
         then Expression.bindingExpMap(recordExp,
           function recordElement(elementName = elementName));
 
+      case SUBSCRIPTED_EXP()
+        algorithm
+          outExp := recordElement(elementName, recordExp.exp);
+        then
+          SUBSCRIPTED_EXP(outExp, recordExp.subscripts,
+            Type.lookupRecordFieldType(elementName, recordExp.ty));
+
       case EMPTY() then fail();
 
       else

OMCompiler/Compiler/NFFrontEnd/NFType.mo

@@ -982,6 +982,8 @@ public
     fieldType := match recordType
       case COMPLEX()
         then InstNode.getType(Class.lookupElement(name, InstNode.getClass(recordType.cls)));
+      case ARRAY()
+        then liftArrayLeftList(lookupRecordFieldType(name, recordType.elementType), recordType.dimensions);
     end match;
   end lookupRecordFieldType;