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/* Do not edit! -- generated file */
#ifndef _SIGXMACROS_INTERNAL_TYPES_H_
#define _SIGXMACROS_INTERNAL_TYPES_H_
/*
* Copyright 2007 Klaus Triendl
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the Free
* Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <sigc++/type_traits.h> // sigc::is_base_and_derived
#include <sigc++/functors/functor_trait.h> // sigc::nil
#include <sigc++/adaptors/deduce_result_type.h> // sigc::adaptor_base
#include <sigc++/adaptors/adaptor_trait.h> // sigc::adaptor_functor
#include <sigc++/adaptors/bind.h> // sigc::bind_functor
#include <sigc++/adaptors/hide.h> // sigc::hide_functor
#include <sigc++/functors/slot_base.h> // sigc::slot_base
#include <sigx/fwddecl.h>
#include <sigx/types.h>
#include <sigx/static_assert.h>
// functor attaching a shared_dispatchable to another functor by binding
// the shared_dispatchable and hiding it
#define SIGX_DISPATCH_WITH_FUNCTOR(T_functor)\
sigc::bind_functor<-1, sigc::hide_functor<-1, T_functor>, shared_dispatchable>
namespace sigx
{
namespace internal
{
/** @short counts the provided template arguments. There are specializations
* for 1 to (7-1) template arguments that are not sigc::nil
*/
template <typename T_arg1 = sigc::nil, typename T_arg2 = sigc::nil, typename T_arg3 = sigc::nil, typename T_arg4 = sigc::nil, typename T_arg5 = sigc::nil, typename T_arg6 = sigc::nil, typename T_arg7 = sigc::nil>
struct count_arguments
{ static const int value = 7; };
template <>
struct count_arguments<>
{ static const int value = 0; };
template <typename T_arg1>
struct count_arguments<T_arg1>
{ static const int value = 1; };
template <typename T_arg1, typename T_arg2>
struct count_arguments<T_arg1, T_arg2>
{ static const int value = 2; };
template <typename T_arg1, typename T_arg2, typename T_arg3>
struct count_arguments<T_arg1, T_arg2, T_arg3>
{ static const int value = 3; };
template <typename T_arg1, typename T_arg2, typename T_arg3, typename T_arg4>
struct count_arguments<T_arg1, T_arg2, T_arg3, T_arg4>
{ static const int value = 4; };
template <typename T_arg1, typename T_arg2, typename T_arg3, typename T_arg4, typename T_arg5>
struct count_arguments<T_arg1, T_arg2, T_arg3, T_arg4, T_arg5>
{ static const int value = 5; };
template <typename T_arg1, typename T_arg2, typename T_arg3, typename T_arg4, typename T_arg5, typename T_arg6>
struct count_arguments<T_arg1, T_arg2, T_arg3, T_arg4, T_arg5, T_arg6>
{ static const int value = 6; };
/** @short finds out whether @e T_functor is tunneled, i.e.
* whether the functor chain contains a functor derived from sigx::tunnel_base.
*
* To investigate the fact that there exists one functor derived from
* sigx::tunnel_base, this template struct cascades down the functor chain.
* e.g. bind_functor - tunnel_functor - member_functor
*
* The template argument @e T_functor is the functor type.
* @e I_isadaptor indicates whether @e T_functor inherits from sigc::adaptor_base.
* @e I_istunnel indicates whether @e T_functor inherits from sigx::tunnel_base.
*/
template<typename T_functor,
bool I_istunnel =
sigc::is_base_and_derived<sigx::tunnel_base, T_functor>::value,
bool I_isadaptor =
sigc::is_base_and_derived<sigc::adaptor_base, T_functor>::value>
struct is_functor_tunneled;
/** @short finds out whether the functor chain contains a tunnel functor.
* This specialization is used for tunneled adaptors.
*/
template<typename T_functor>
struct is_functor_tunneled<T_functor, true, true>
{
static const bool value = true;
};
/** @short finds out whether the functor chain contains a tunnel functor.
* This specialization is used for tunneled arbitrary functors.
*/
template<typename T_functor>
struct is_functor_tunneled<T_functor, true, false>
{
static const bool value = true;
};
/** @short finds out whether the functor chain contains a tunnel functor.
* This specialization is used for arbitrary functors, static and member
* function pointers.
*/
template<typename T_functor>
struct is_functor_tunneled<T_functor, false, false>
{
// no chance to investigate further, probably a static or member function
// pointer
static const bool value = false;
};
/** @short finds out whether the functor chain contains a tunnel functor.
* This specialization is used for adaptors
*/
template<typename T_functor>
struct is_functor_tunneled<T_functor, false, true>
{
// investigate further by cascading the functor chain
// functor must define adaptor_type;
// T_functor is probably derived from sigc::adapts<T_functor>; defines
// adaptor_type
typedef typename T_functor::adaptor_type adaptor_type;
static const bool value = is_functor_tunneled<adaptor_type>::value;
};
/** @short finds out whether the functor chain contains a tunnel functor.
* This specialization is used for sigc::adaptor_functors wrapping
* static and arbitrary functors.
* This specialization is needed because sigc::adaptor_functor does not define
* its wrapped functor as adaptor_type
*/
template<typename T_functor>
struct is_functor_tunneled<sigc::adaptor_functor<T_functor>, false, true>
{
static const bool value = is_functor_tunneled<T_functor>::value;
};
/** @short finds out whether @e T_functor is tunneled, i.e.
* whether the functor chain contains a functor derived from sigx::tunnel_base.
*
* To investigate the fact that there exists one functor derived from
* sigx::tunnel_base, this template struct cascades down the functor chain.
* e.g. bind_functor - tunnel_functor - member_functor
*
* The template argument @e T_functor is the functor type.
* @e I_isadaptor indicates whether @e T_functor inherits from sigc::adaptor_base.
* @e I_isslot indicates whether @e T_functor inherits from sigc::slot_base.
*/
template<
typename T_functor,
bool I_isslot = sigc::is_base_and_derived<sigc::slot_base, T_functor>::value,
bool I_isadaptor = sigc::is_base_and_derived<sigc::adaptor_base, T_functor>::value>
struct is_or_adapts_slot;
/** @short finds out whether the functor chain contains a tunnel functor.
* This specialization is used for tunneled adaptors.
*/
template<typename T_functor>
struct is_or_adapts_slot<T_functor, true, false>
{
static const bool value = true;
};
/** @short finds out whether the functor chain contains a tunnel functor.
* This specialization is used for arbitrary functors, static and member
* function pointers.
*/
template<typename T_functor>
struct is_or_adapts_slot<T_functor, false, false>
{
// no chance to investigate further, probably a static or member function
// pointer
static const bool value = false;
};
/** @short finds out whether the functor chain contains a tunnel functor.
* This specialization is used for adaptors
*/
template<typename T_functor>
struct is_or_adapts_slot<T_functor, false, true>
{
// investigate further by cascading the functor chain
// functor must define adaptor_type;
// T_functor is probably derived from sigc::adapts<T_functor>; defines
// adaptor_type
typedef typename T_functor::adaptor_type adaptor_type;
static const bool value = is_or_adapts_slot<adaptor_type>::value;
};
/** @short finds out whether the functor chain contains a tunnel functor.
* This specialization is used for sigc::adaptor_functors wrapping
* static and arbitrary functors.
* This specialization is needed because sigc::adaptor_functor does not define
* its wrapped functor as adaptor_type
*/
template<typename T_functor>
struct is_or_adapts_slot<sigc::adaptor_functor<T_functor>, false, true>
{
static const bool value = is_or_adapts_slot<T_functor>::value;
};
/** @short Used to find a dispatchable out of the functor/adaptor chain,
* i.e. the dispatchable object of a mem_functor or the shared_dispatchable
* stored by dispatch_with().
*
* It additionally checks at compile time that T_functor is really a functor on a
* dispatchable's method by accessing the member variable obj_ of mem_functors
* and converting the object to a sigx::dispatchable;
* hence, the compiler will issue error messages if it is not a mem_functor or the object
* is not convertible to a sigx::dispatchable
*/
template<typename T_functor, bool I_isadapter = sigc::is_base_and_derived<sigc::adaptor_base, T_functor>::value>
struct dispatchable_constraint;
template<typename T_functor>
struct dispatchable_constraint<T_functor, false>
{
static const dispatchable& find_dispatchable(typename sigc::type_trait<T_functor>::take _A_func)
{
// if the compiler reports an error there are only 2 possibilities:
// 1) you connected a static function to a signal or opened a tunnel on a
// static signal without specifying the dispatchable to operate on.
// 2) you connected a member function to a signal or opened a tunnel on a
// member function where the member function is not from a dispatchable
// solution: call 'open_tunnel_with' or 'open_sync_tunnel_with' and specify the dispatachable!
// access obj_ of the functor;
// this issues a compile time error if _A_func is not a functor
// on an object's member function (only sigc member functors have this)
// obj_ is a (const_)limit_reference type; must call invoke() to
// ensure that we get the bound member type instead of a sigc::trackable
return _A_func.obj_.invoke();
}
};
// walks down the adaptor chain
template<typename T_functor>
struct dispatchable_constraint<T_functor, true>
{
static const dispatchable& find_dispatchable(typename sigc::type_trait<T_functor>::take _A_func)
{
return is_adaptor_dispatchable(_A_func);
}
private:
// takes T_functor and matches it again to find
// special types and walk down the adaptor chain
template<typename T_adapted_functor>
static const dispatchable& is_adaptor_dispatchable(const sigc::adaptor_functor<T_adapted_functor>& _A_func)
{
return dispatchable_constraint<T_adapted_functor>::find_dispatchable(_A_func.functor_);
}
// match the sigx special dispatchable adaptor chain
template<typename T_adapted_functor>
static const dispatchable& is_adaptor_dispatchable(const SIGX_DISPATCH_WITH_FUNCTOR(T_adapted_functor)& _A_func)
{
// no need to proceed as we found out that the functor is dispatchable
return _A_func.bound1_.visit();
}
// match all other apaptors, must define adaptor_type
template<typename T_adapted_functor>
static const dispatchable& is_adaptor_dispatchable(const T_adapted_functor& _A_func)
{
// T_adapted_functor must define adaptor_type;
typedef typename T_adapted_functor::adaptor_type adaptor_type;
// _A_func.functor_ is always an adaptor_type
return is_adaptor_dispatchable(_A_func.functor_);
}
};
} // namespace internal
} // namespace sigx
#endif /* _SIGXMACROS_INTERNAL_TYPES_H_ */
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