What is the "value" attribute?

Hi Joe!

There shouldn't be any issues with your implementation. Rather, the ambiguity seems to arise from how you print m_value. I assume you're calling cout << m_value << endl somewhere in your code. If you change this to cout << m_value.get() << endl, your code should compile.

If you want to hide it from the user, rather than using savestate you can just pass visiblity::hide to the attribute:

attribute<symbol> m_value{this, "value", "test", visibility::hide};

This way it's still exposed to pattr/preset/parameter_enable without allowing the user to set it manually

Minimal example (non-hidden):

#include "c74_min.h"

using namespace c74::min;
using namespace c74::min::ui;

class playground : public object<playground>, public ui_operator<100, 20> {
public:
    inlet<> inlet_main{this, ""};
    outlet<> outlet_main{this, ""};

    explicit playground(const atoms& args = {}): ui_operator {this, args} {}

    attribute<symbol> m_value{this, "value", "test"};

    message<> paint { this, "paint", MIN_FUNCTION {
        cout << m_value.get() << endl; // print stored value on mouseover

        target t{args};
        c74::min::ui::rect<fill>{t, color {color::predefined::gray}};
        return {};
    }};
};

MIN_EXTERNAL(playground)