//          Copyright Sebastian Jeckel 2017.
// Distributed under the Boost Software License, Version 1.0.
//    (See accompanying file LICENSE_1_0.txt or copy at
//          http://www.boost.org/LICENSE_1_0.txt)

#include 
#include 
#include 

#include "react/state.h"
#include "react/event.h"
#include "react/observer.h"

///////////////////////////////////////////////////////////////////////////////////////////////////
/// Example 1 - Reactive class members
///////////////////////////////////////////////////////////////////////////////////////////////////
namespace example1
{
    using namespace std;
    using namespace react;

    Group g;

    class Shape
    {
    public:
        StateVar width     = StateVar::Create(g, 0);
        StateVar height    = StateVar::Create(g, 0);

        State size         = State::Create(g, CalcSize, width, height);

        auto GetReactiveMembers() const -> decltype(auto)
            { return std::tie(width, height, size); }

    private:
        static int CalcSize(int w, int h)
            { return w * h; }
    };

    void Run()
    {
        cout