Method CopyOnLabelChange

src/App/PropertyExpressionEngine.cpp:1062–1098

}

Property* PropertyExpressionEngine::CopyOnLabelChange(App::DocumentObject* obj,
                                                      const std::string& ref,
                                                      const char* newLabel) const
{
    std::unique_ptr<PropertyExpressionEngine> engine;
    for (auto it = expressions.begin(); it != expressions.end(); ++it) {
#ifdef BOOST_NO_CXX11_SMART_PTR
        std::shared_ptr<Expression> expr(
            it->second.expression->updateLabelReference(obj, ref, newLabel).release());
#else
        std::shared_ptr<Expression> expr(
            it->second.expression->updateLabelReference(obj, ref, newLabel));
#endif
        if (!expr && !engine) {
            continue;
        }
        if (!engine) {
            engine = std::make_unique<PropertyExpressionEngine>();
            for (auto it2 = expressions.begin(); it2 != it; ++it2) {
                ExpressionInfo info;
                if (it2->second.expression) {
                    info.expression = std::shared_ptr<Expression>(it2->second.expression->copy());
                }
                engine->expressions[it2->first] = info;
            }
        }
        else if (!expr) {
            expr = it->second.expression;
        }
        engine->expressions[it->first] = ExpressionInfo(expr);
    }
    if (!engine) {
        return nullptr;
    }
    engine->validator = validator;
    return engine.release();
}

Property* PropertyExpressionEngine::CopyOnLinkReplace(const App::DocumentObject* parent,
                                                      App::DocumentObject* oldObj,