Use clang-tidy to prevent else after return

include/sqlpp11/data_types/text/result_field.h

@@ -82,10 +82,8 @@ namespace sqlpp
     {
       return os << "NULL";
     }
-    else
-    {
+
     return os << e.value();
   }
-  }
 }  // namespace sqlpp
 #endif

include/sqlpp11/rhs_wrap.h

@@ -71,18 +71,14 @@ namespace sqlpp
         {
           return t.is_null();
         }
-        else
-        {
+
         if (t.is_null())
         {
           return false;
         }
-          else
-          {
+
         return t._is_trivial();
       }
-        }
-      }
     };
 
     template <typename Expr, typename Enable = void>

include/sqlpp11/serializer_context.h

@@ -57,11 +57,9 @@ namespace sqlpp
         }
         return retVal;
       }
-      else
-      {
+
       return arg;
     }
-    }
 
     std::ostream& _os;
   };