As an example of using the enum_bitmask infrastructure for type safe

sets of optional boolean parameters, the cut function "keep upper",
"keep lower" and "flip lower" boolean parameters were converted into
a single type safe enum_bitmask. Such a coding style is certainly
wordier than the original code, but much safer and more readable
than the error prone "boolean, boolean, boolean" function call
parameter list.

src/PrusaSlicer.cpp

@@ -376,7 +376,7 @@ int CLI::run(int argc, char **argv)
                         o->cut(Z, m_config.opt_float("cut"), &out);
                     }
 #else
-                    model.objects.front()->cut(0, m_config.opt_float("cut"), true, true, true);
+                    model.objects.front()->cut(0, m_config.opt_float("cut"), ModelObjectCutAttribute::KeepLower | ModelObjectCutAttribute::KeepUpper | ModelObjectCutAttribute::FlipLower);
 #endif
                     model.delete_object(size_t(0));
                 }