/Src/Dependencies/Boost/boost/signals2/detail/slot_template.hpp

  1// Boost.Signals2 library
  2
  3// Copyright Frank Mori Hess 2007-2008.
  4// Copyright Timmo Stange 2007.
  5// Copyright Douglas Gregor 2001-2004. Use, modification and
  6// distribution is subject to the Boost Software License, Version
  7// 1.0. (See accompanying file LICENSE_1_0.txt or copy at
  8// http://www.boost.org/LICENSE_1_0.txt)
  9
 10// For more information, see http://www.boost.org
 11
 12// This file is included iteratively, and should not be protected from multiple inclusion
 13
 14#ifdef BOOST_NO_VARIADIC_TEMPLATES
 15#define BOOST_SIGNALS2_NUM_ARGS BOOST_PP_ITERATION()
 16#else
 17#define BOOST_SIGNALS2_NUM_ARGS 1
 18#endif
 19
 20
 21namespace boost
 22{
 23  namespace signals2
 24  {
 25    template<typename Signature, typename SlotFunction> class slot;
 26
 27    // slot class template.
 28    template<BOOST_SIGNALS2_SIGNATURE_TEMPLATE_DECL(BOOST_SIGNALS2_NUM_ARGS),
 29      typename SlotFunction = BOOST_SIGNALS2_FUNCTION_N_DECL(BOOST_SIGNALS2_NUM_ARGS)>
 30      class BOOST_SIGNALS2_SLOT_CLASS_NAME(BOOST_SIGNALS2_NUM_ARGS);
 31
 32    template<BOOST_SIGNALS2_SLOT_TEMPLATE_SPECIALIZATION_DECL(BOOST_SIGNALS2_NUM_ARGS)>
 33      class BOOST_SIGNALS2_SLOT_CLASS_NAME(BOOST_SIGNALS2_NUM_ARGS) BOOST_SIGNALS2_SLOT_TEMPLATE_SPECIALIZATION
 34      : public slot_base, public detail::BOOST_SIGNALS2_STD_FUNCTIONAL_BASE(R)
 35
 36    {
 37    public:
 38      template<BOOST_SIGNALS2_PREFIXED_SIGNATURE_TEMPLATE_DECL(BOOST_SIGNALS2_NUM_ARGS, Other), typename OtherSlotFunction>
 39      friend class BOOST_SIGNALS2_SLOT_CLASS_NAME(BOOST_SIGNALS2_NUM_ARGS);
 40
 41      typedef SlotFunction slot_function_type;
 42      typedef R result_type;
 43      typedef typename mpl::identity<BOOST_SIGNALS2_SIGNATURE_FUNCTION_TYPE(BOOST_SIGNALS2_NUM_ARGS)>::type signature_type;
 44
 45#ifdef BOOST_NO_VARIADIC_TEMPLATES
 46
 47// typedef Tn argn_type;
 48#define BOOST_SIGNALS2_MISC_STATEMENT(z, n, data) \
 49    typedef BOOST_PP_CAT(T, BOOST_PP_INC(n)) BOOST_PP_CAT(BOOST_PP_CAT(arg, BOOST_PP_INC(n)), _type);
 50          BOOST_PP_REPEAT(BOOST_SIGNALS2_NUM_ARGS, BOOST_SIGNALS2_MISC_STATEMENT, ~)
 51#undef BOOST_SIGNALS2_MISC_STATEMENT
 52#if BOOST_SIGNALS2_NUM_ARGS == 1
 53      typedef arg1_type argument_type;
 54#elif BOOST_SIGNALS2_NUM_ARGS == 2
 55      typedef arg1_type first_argument_type;
 56      typedef arg2_type second_argument_type;
 57#endif
 58
 59      template<unsigned n> class arg : public
 60        detail::BOOST_SIGNALS2_PREPROCESSED_ARG_N_TYPE_CLASS_NAME(BOOST_SIGNALS2_NUM_ARGS)
 61        <n BOOST_SIGNALS2_PP_COMMA_IF(BOOST_SIGNALS2_NUM_ARGS)
 62        BOOST_SIGNALS2_ARGS_TEMPLATE_INSTANTIATION(BOOST_SIGNALS2_NUM_ARGS)>
 63      {};
 64
 65      BOOST_STATIC_CONSTANT(int, arity = BOOST_SIGNALS2_NUM_ARGS);
 66
 67#else // BOOST_NO_VARIADIC_TEMPLATES
 68
 69      template<unsigned n> class arg
 70      {
 71      public:
 72        typedef typename detail::variadic_arg_type<n, Args...>::type type;
 73      };
 74      BOOST_STATIC_CONSTANT(int, arity = sizeof...(Args));
 75
 76#endif // BOOST_NO_VARIADIC_TEMPLATES
 77
 78      template<typename F>
 79      BOOST_SIGNALS2_SLOT_CLASS_NAME(BOOST_SIGNALS2_NUM_ARGS)(const F& f)
 80      {
 81        init_slot_function(f);
 82      }
 83      // copy constructors
 84#ifdef BOOST_NO_VARIADIC_TEMPLATES
 85      template<BOOST_SIGNALS2_PREFIXED_SIGNATURE_TEMPLATE_DECL(BOOST_SIGNALS2_NUM_ARGS, Other), typename OtherSlotFunction>
 86      BOOST_SIGNALS2_SLOT_CLASS_NAME(BOOST_SIGNALS2_NUM_ARGS)(const BOOST_SIGNALS2_SLOT_CLASS_NAME(BOOST_SIGNALS2_NUM_ARGS)
 87        <BOOST_SIGNALS2_PREFIXED_SIGNATURE_TEMPLATE_INSTANTIATION(BOOST_SIGNALS2_NUM_ARGS, Other), OtherSlotFunction> &other_slot):
 88        slot_base(other_slot), _slot_function(other_slot._slot_function)
 89      {
 90      }
 91#endif
 92      template<typename Signature, typename OtherSlotFunction>
 93      BOOST_SIGNALS2_SLOT_CLASS_NAME(BOOST_SIGNALS2_NUM_ARGS)(const slot<Signature, OtherSlotFunction> &other_slot):
 94        slot_base(other_slot), _slot_function(other_slot._slot_function)
 95      {
 96      }
 97      // bind syntactic sugar
 98      BOOST_SIGNALS2_SLOT_N_BINDING_CONSTRUCTORS
 99      // invocation
100      R operator()(BOOST_SIGNALS2_SIGNATURE_FULL_ARGS(BOOST_SIGNALS2_NUM_ARGS))
101      {
102        locked_container_type locked_objects = lock();
103        return _slot_function(BOOST_SIGNALS2_SIGNATURE_ARG_NAMES(BOOST_SIGNALS2_NUM_ARGS));
104      }
105      R operator()(BOOST_SIGNALS2_SIGNATURE_FULL_ARGS(BOOST_SIGNALS2_NUM_ARGS)) const
106      {
107        locked_container_type locked_objects = lock();
108        return _slot_function(BOOST_SIGNALS2_SIGNATURE_ARG_NAMES(BOOST_SIGNALS2_NUM_ARGS));
109      }
110      // tracking
111      BOOST_SIGNALS2_SLOT_CLASS_NAME(BOOST_SIGNALS2_NUM_ARGS)& track(const weak_ptr<void> &tracked)      {
112        _tracked_objects.push_back(tracked);
113        return *this;
114      }
115      BOOST_SIGNALS2_SLOT_CLASS_NAME(BOOST_SIGNALS2_NUM_ARGS)& track(const signal_base &signal)
116      {
117        track_signal(signal);
118        return *this;
119      }
120      BOOST_SIGNALS2_SLOT_CLASS_NAME(BOOST_SIGNALS2_NUM_ARGS)& track(const slot_base &slot)
121      {
122        tracked_container_type::const_iterator it;
123        for(it = slot.tracked_objects().begin(); it != slot.tracked_objects().end(); ++it)
124        {
125          _tracked_objects.push_back(*it);
126        }
127        return *this;
128      }
129      template<typename ForeignWeakPtr>
130      BOOST_SIGNALS2_SLOT_CLASS_NAME(BOOST_SIGNALS2_NUM_ARGS)& track_foreign(const ForeignWeakPtr &tracked,
131        typename weak_ptr_traits<ForeignWeakPtr>::shared_type * /*SFINAE*/ = 0)
132      {
133        _tracked_objects.push_back(detail::foreign_void_weak_ptr(tracked));
134        return *this;
135      }
136      template<typename ForeignSharedPtr>
137      BOOST_SIGNALS2_SLOT_CLASS_NAME(BOOST_SIGNALS2_NUM_ARGS)& track_foreign(const ForeignSharedPtr &tracked,
138        typename shared_ptr_traits<ForeignSharedPtr>::weak_type * /*SFINAE*/ = 0)
139      {
140        _tracked_objects.push_back
141        (
142          detail::foreign_void_weak_ptr
143          (
144            typename shared_ptr_traits<ForeignSharedPtr>::weak_type(tracked)
145          )
146        );
147        return *this;
148      }
149
150      const slot_function_type& slot_function() const {return _slot_function;}
151      slot_function_type& slot_function() {return _slot_function;}
152    private:
153      template<typename F>
154      void init_slot_function(const F& f)
155      {
156        _slot_function = detail::get_invocable_slot(f, detail::tag_type(f));
157        signals2::detail::tracked_objects_visitor visitor(this);
158        boost::visit_each(visitor, f);
159      }
160
161      SlotFunction _slot_function;
162    };
163
164#ifdef BOOST_NO_VARIADIC_TEMPLATES
165    namespace detail
166    {
167      template<unsigned arity, typename Signature, typename SlotFunction>
168      class slotN;
169      // partial template specialization
170      template<typename Signature, typename SlotFunction>
171      class slotN<BOOST_SIGNALS2_NUM_ARGS, Signature, SlotFunction>
172      {
173      public:
174        typedef BOOST_SIGNALS2_SLOT_CLASS_NAME(BOOST_SIGNALS2_NUM_ARGS)<
175          BOOST_SIGNALS2_PORTABLE_SIGNATURE(BOOST_SIGNALS2_NUM_ARGS, Signature),
176          SlotFunction> type;
177      };
178    }
179#endif
180  } // end namespace signals2
181} // end namespace boost
182
183#undef BOOST_SIGNALS2_NUM_ARGS