access.hpp

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//
// Copyright (C) 2014, 2015 Ableton AG, Berlin. All rights reserved.
//
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// Software is furnished to do so, subject to the following conditions:
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#pragma once

#include <atria/estd/type_traits.hpp>
#include <atria/meta/utils.hpp>
#include <utility>

namespace atria {
namespace funken {

namespace detail {

class access
{
public:

  template<typename T>
  static auto roots(T&& object)
    -> ABL_DECLTYPE_RETURN(
      std::forward<T>(object).roots())

  
  template<typename T>
  static auto signal(T&& object)
    -> ABL_DECLTYPE_RETURN(
      std::forward<T>(object).signal())

  template<typename T>
  static auto watchers(T&& object)
    -> ABL_DECLTYPE_RETURN(
      std::forward<T>(object).watchers())
};

template <typename ObjectT>
struct signal_type
{
  using type =
    estd::decay_t<
      typename estd::decay_t<decltype(
        access::signal(std::declval<ObjectT>())
      )>::element_type
    >;
};

template <typename ObjectT>
using signal_type_t = typename signal_type<ObjectT>::type;

} // namespace detail

} // namespace funken
} // namespace atria