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///
/// @file eo_inherit.hh
///
#ifndef EFL_CXX_EO_INHERIT_HH
#define EFL_CXX_EO_INHERIT_HH
#include <tuple>
#include <cassert>
#include <eina_integer_sequence.hh>
#include "eo_ops.hh"
#include "eo_private.hh"
#include "eo_cxx_interop.hh"
namespace efl { namespace eo {
namespace detail {
template <typename D, typename... E, std::size_t... S>
Eo_Class const* create_class(eina::index_sequence<S...>);
/// @internal
///
/// @brief Find the correct function for the <em>"constructor"</em>
/// operation and invoke it.
///
/// @param this_ The <em>user data</em> to be passed to the resolved function.
/// @param args An heterogeneous sequence of arguments.
///
inline EOAPI EO_VOID_FUNC_BODYV(inherit_constructor, EO_FUNC_CALL(this_), void* this_);
}
/// @addtogroup Efl_Cxx_API
/// @{
/// @brief Template-class that allows client code to inherit from
/// <em>EO C++ Classes</em> without the need to make explicit calls to
/// <em>EO</em> methods --- that would naturally be necessary to
/// register itself in the <em>EO Subsystem</em>.
///
/// @param D The derived class
/// @param O The parent class
/// @param E Class extensions (either mixins or interfaces)
///
/// The derived class @p D will inherit all EO operations and event
/// callbacks from the parent class @p P, as well as from the <c>Base
/// Class</c> (@ref efl::eo::concrete) since every EO C++ Class must
/// inherit from it.
///
/// efl::eo::inherit makes use of meta-template elements to build (in
/// compile-time) code capable of registering @p D as an <em>EO
/// Class</em> within <em>EO Subsystem</em>. Each class is registered
/// only once upon instantiation of an object of its type.
///
/// @note Function overriding is currently not supported.
///
template <typename D, typename... E>
struct inherit;
/// @}
/// @addtogroup Efl_Cxx_API
/// @{
template <typename D, typename... E>
struct inherit
: detail::operations<E>::template type<inherit<D, E...> > ...
, detail::conversion_operator<inherit<D, E...>, E>...
{
/// @typedef inherit_base
///
typedef inherit<D, E...> inherit_base;
//@{
/// @brief Class constructor.
///
/// @ref inherit has a "variadic" constructor implementation that
/// allows from zero to EFL_MAX_ARGS heterogeneous parameters.
///
template<typename... Args>
inherit(efl::eo::parent_type _p, Args&& ... args)
: _eo_cls(nullptr), _eo_raw(nullptr)
{
_eo_cls = detail::create_class<D, E...> (eina::make_index_sequence<sizeof...(E)>());
eo_add_ref(&_eo_raw, _eo_cls, _p._eo_raw, detail::inherit_constructor(_eo_raw, this), ::efl::eolian::call_ctors(_eo_raw, args...));
::efl::eolian::register_ev_del_free_callback(_eo_raw, args...);
}
template<typename... Args>
inherit(Args&& ... args)
: inherit(::efl::eo::parent = nullptr, std::forward<Args>(args)...)
{}
//@}
/// @brief Class destructor.
///
~inherit()
{
detail::unref(_eo_raw);
}
/// @brief Gets the <em>EO Object</em> corresponding to this <em>EO
/// C++ Object</em>.
///
/// @return A pointer to the <em>EO Object</em>.
///
Eo* _eo_ptr() const { return _eo_raw; }
/// @brief Gets the <em>EO Class</em> corresponding to this <em>EO
/// C++ Class</em>.
///
/// @return A pointer to the <em>EO Class</em>.
///
Eo_Class const* _eo_class() const { return _eo_cls; }
Eo* _release()
{
Eo* tmp = _eo_raw;
_eo_raw = nullptr;
return tmp;
}
protected:
/// @brief Copy constructor.
///
inherit(inherit const& other)
: _eo_cls(other._eo_cls)
, _eo_raw(other._eo_raw)
{ detail::ref(_eo_raw); }
/// @brief Assignment Operator
///
inherit& operator=(inherit const& other)
{
_eo_cls = other._eo_cls;
_eo_raw = other._eo_raw;
detail::ref(_eo_raw);
return *this;
}
private:
Eo_Class const* _eo_cls; ///< The <em>EO Class</em>.
Eo* _eo_raw; ///< The <em>EO Object</em>.
};
/// @}
} } // namespace efl { namespace eo {
#include "eo_inherit_bindings.hh"
#endif // EFL_CXX_INHERIT_HH
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