Method parseString

src/Gui/QuantitySpinBox.cpp:135–166

        return success;
    }
    bool parseString(
        const QString& str,
        Base::Quantity& result,
        double& value,
        const App::ObjectIdentifier& path
    ) const
    {
        App::ObjectIdentifier pathtmp = path;
        try {
            QString copy = str;
            copy.remove(locale.groupSeparator());

            // Expression parser
            std::shared_ptr<Expression> expr(
                ExpressionParser::parse(path.getDocumentObject(), copy.toUtf8().constData())
            );
            if (expr) {

                std::unique_ptr<Expression> res(expr->eval());
                NumberExpression* n = freecad_cast<NumberExpression*>(res.get());
                if (n) {
                    result = n->getQuantity();
                    value = result.getValue();
                    return true;
                }
            }
        }
        catch (Base::Exception&) {
            return false;
        }
        return false;
    }
    Base::Quantity validateAndInterpret(
        QString& input,
        QValidator::State& state,