comparison DEPENDENCIES/generic/include/boost/signals/signal_template.hpp @ 16:2665513ce2d3

Add boost headers

+// Boost.Signals library
+
+// Copyright Douglas Gregor 2001-2004. Use, modification and
+// distribution is subject to 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)
+
+// For more information, see http://www.boost.org
+
+// This file intentionally does not have include guards, because it is meant
+// to be included multiple times (one for each signalN class). The
+// BOOST_SIGNALS_SIGNAL_TEMPLATE_HEADER_INCLUDED macro merely serves to
+// suppress reinclusion of the files that this header depends on.
+
+#ifndef BOOST_SIGNALS_SIGNAL_TEMPLATE_HEADER_INCLUDED
+#define BOOST_SIGNALS_SIGNAL_TEMPLATE_HEADER_INCLUDED
+#  include <boost/config.hpp>
+#  include <boost/signals/connection.hpp>
+#  include <boost/utility.hpp>
+#  include <boost/ref.hpp>
+#  include <boost/signals/slot.hpp>
+#  include <boost/last_value.hpp>
+#  include <boost/signals/detail/signal_base.hpp>
+#  include <boost/signals/detail/slot_call_iterator.hpp>
+#  include <boost/mpl/bool.hpp>
+#  include <boost/type_traits/is_convertible.hpp>
+#  include <cassert>
+#  include <functional>
+#  include <memory>
+#endif // !BOOST_SIGNALS_SIGNAL_TEMPLATE_HEADER_INCLUDED
+
+#ifdef BOOST_HAS_ABI_HEADERS
+#  include BOOST_ABI_PREFIX
+#endif
+
+// Include the appropriate functionN header
+#define BOOST_SIGNAL_FUNCTION_N_HEADER BOOST_JOIN(<boost/function/function,BOOST_SIGNALS_NUM_ARGS.hpp>)
+#include BOOST_SIGNAL_FUNCTION_N_HEADER
+
+// Determine if a comma should follow a listing of the arguments/parameters
+#if BOOST_SIGNALS_NUM_ARGS == 0
+#  define BOOST_SIGNALS_COMMA_IF_NONZERO_ARGS
+#else
+#  define BOOST_SIGNALS_COMMA_IF_NONZERO_ARGS ,
+#endif // BOOST_SIGNALS_NUM_ARGS > 0
+
+// Define class names used
+#define BOOST_SIGNALS_SIGNAL BOOST_JOIN(signal,BOOST_SIGNALS_NUM_ARGS)
+#define BOOST_SIGNALS_FUNCTION BOOST_JOIN(function,BOOST_SIGNALS_NUM_ARGS)
+#define BOOST_SIGNALS_ARGS_STRUCT BOOST_JOIN(args,BOOST_SIGNALS_NUM_ARGS)
+#define BOOST_SIGNALS_CALL_BOUND BOOST_JOIN(call_bound,BOOST_SIGNALS_NUM_ARGS)
+
+// Define commonly-used instantiations
+#define BOOST_SIGNALS_ARGS_STRUCT_INST \
+  BOOST_SIGNALS_NAMESPACE::detail::BOOST_SIGNALS_ARGS_STRUCT<BOOST_SIGNALS_TEMPLATE_ARGS>
+
+namespace boost {
+  namespace BOOST_SIGNALS_NAMESPACE {
+    namespace detail {
+      // Holds the arguments for a bound slot call in a single place
+      template<BOOST_SIGNALS_TEMPLATE_PARMS
+               BOOST_SIGNALS_COMMA_IF_NONZERO_ARGS
+               typename Dummy = int>
+      struct BOOST_SIGNALS_ARGS_STRUCT {
+        BOOST_SIGNALS_ARGS_STRUCT(BOOST_SIGNALS_COPY_PARMS)
+          BOOST_SIGNALS_INIT_ARGS
+        {
+        }
+
+        BOOST_SIGNALS_ARGS_AS_MEMBERS
+      };
+
+      // Function object that calls the function object given to it, passing
+      // the bound arguments along to that underlying function object
+      template<typename R>
+      struct BOOST_SIGNALS_CALL_BOUND {
+        template<BOOST_SIGNALS_TEMPLATE_PARMS
+                 BOOST_SIGNALS_COMMA_IF_NONZERO_ARGS
+                 typename F>
+        struct caller {
+          typedef BOOST_SIGNALS_ARGS_STRUCT<BOOST_SIGNALS_TEMPLATE_ARGS>*
+            args_type;
+
+          args_type args;
+
+          typedef R result_type;
+
+          caller() {}
+          caller(args_type a) : args(a) {}
+
+          template<typename Pair>
+          R operator()(const Pair& slot) const
+          {
+            F* target = const_cast<F*>(unsafe_any_cast<F>(&slot.second));
+            return (*target)(BOOST_SIGNALS_BOUND_ARGS);
+          }
+        };
+      };
+
+      template<>
+      struct BOOST_SIGNALS_CALL_BOUND<void> {
+        template<BOOST_SIGNALS_TEMPLATE_PARMS
+                 BOOST_SIGNALS_COMMA_IF_NONZERO_ARGS
+                 typename F>
+        struct caller {
+          typedef BOOST_SIGNALS_ARGS_STRUCT<BOOST_SIGNALS_TEMPLATE_ARGS>*
+            args_type;
+
+          args_type args;
+
+          typedef unusable result_type;
+
+          caller(args_type a) : args(a) {}
+
+          template<typename Pair>
+          unusable operator()(const Pair& slot) const
+          {
+            F* target = const_cast<F*>(unsafe_any_cast<F>(&slot.second));
+            (*target)(BOOST_SIGNALS_BOUND_ARGS);
+            return unusable();
+          }
+        };
+      };
+    } // namespace detail
+  } // namespace BOOST_SIGNALS_NAMESPACE
+
+  // The actual signalN class
+  template<
+    typename R,
+    BOOST_SIGNALS_TEMPLATE_PARMS
+    BOOST_SIGNALS_COMMA_IF_NONZERO_ARGS
+    typename Combiner = last_value<R>,
+    typename Group = int,
+    typename GroupCompare = std::less<Group>,
+    typename SlotFunction = BOOST_SIGNALS_FUNCTION<
+                              R BOOST_SIGNALS_COMMA_IF_NONZERO_ARGS
+                              BOOST_SIGNALS_TEMPLATE_ARGS>
+  >
+  class BOOST_SIGNALS_SIGNAL :
+    public BOOST_SIGNALS_NAMESPACE::detail::signal_base, // management of slot list
+    public BOOST_SIGNALS_NAMESPACE::trackable // signals are trackable
+  {
+  public:
+    // The slot function type
+    typedef SlotFunction slot_function_type;
+
+    // Result type of a slot
+    typedef typename BOOST_SIGNALS_NAMESPACE::detail::slot_result_type<R>::type
+      slot_result_type;
+
+    // Argument types
+    BOOST_SIGNALS_ARG_TYPES
+
+#if BOOST_SIGNALS_NUM_ARGS == 1
+    typedef T1 argument_type;
+#elif BOOST_SIGNALS_NUM_ARGS == 2
+    typedef T1 first_argument_type;
+    typedef T2 second_argument_type;
+#endif
+
+  private:
+    // The real slot name comparison object type
+    typedef BOOST_SIGNALS_NAMESPACE::detail::group_bridge_compare<GroupCompare, Group>
+      real_group_compare_type;
+
+    // The function object passed to the slot call iterator that will call
+    // the underlying slot function with its arguments bound
+    typedef BOOST_SIGNALS_NAMESPACE::detail::BOOST_SIGNALS_CALL_BOUND<R>
+      outer_bound_slot_caller;
+    typedef typename outer_bound_slot_caller::template
+              caller<BOOST_SIGNALS_TEMPLATE_ARGS
+                     BOOST_SIGNALS_COMMA_IF_NONZERO_ARGS
+                     slot_function_type>
+      call_bound_slot;
+
+  public:
+    // Combiner's result type
+    typedef typename Combiner::result_type result_type;
+
+    // Combiner type
+    typedef Combiner combiner_type;
+
+    // Slot type
+    typedef slot<slot_function_type> slot_type;
+
+    // Slot name type and comparison
+    typedef Group group_type;
+    typedef GroupCompare group_compare_type;
+
+    typedef BOOST_SIGNALS_NAMESPACE::detail::slot_call_iterator<
+              call_bound_slot, iterator> slot_call_iterator;
+
+    explicit
+    BOOST_SIGNALS_SIGNAL(const Combiner& c = Combiner(),
+                         const GroupCompare& comp = GroupCompare()) :
+      BOOST_SIGNALS_NAMESPACE::detail::signal_base(real_group_compare_type(comp),
+                                                   c)
+    {
+    }
+
+    // Connect a slot to this signal
+    BOOST_SIGNALS_NAMESPACE::connection
+    connect(const slot_type&,
+            BOOST_SIGNALS_NAMESPACE::connect_position at
+              = BOOST_SIGNALS_NAMESPACE::at_back);
+
+
+    BOOST_SIGNALS_NAMESPACE::connection
+    connect(const group_type&, const slot_type&,
+            BOOST_SIGNALS_NAMESPACE::connect_position at
+              = BOOST_SIGNALS_NAMESPACE::at_back);
+
+#if BOOST_WORKAROUND(BOOST_MSVC, <= 1300)
+    // MSVC 6.0 and 7.0 don't handle the is_convertible test well
+    void disconnect(const group_type& group)
+    {
+      impl->disconnect(group);
+    }
+#else
+    template<typename T>
+    void disconnect(const T& t)
+    {
+      typedef mpl::bool_<(is_convertible<T, group_type>::value)> is_group;
+      this->do_disconnect(t, is_group());
+    }
+
+  private:
+    // Disconnect a named slot
+    void do_disconnect(const group_type& group, mpl::bool_<true>)
+    {
+      impl->disconnect(group);
+    }
+
+    template<typename Function>
+    void do_disconnect(const Function& f, mpl::bool_<false>)
+    {
+      // Notify the slot handling code that we are iterating through the slots
+      BOOST_SIGNALS_NAMESPACE::detail::call_notification notification(this->impl);
+
+      for (iterator i = impl->slots_.begin(); i != impl->slots_.end(); ++i) {
+        slot_function_type& s = *unsafe_any_cast<slot_function_type>(&i->second);
+        if (s == f) i->first.disconnect();
+      }
+    }
+#endif
+
+  public:
+
+    // Emit the signal
+    result_type operator()(BOOST_SIGNALS_PARMS);
+    result_type operator()(BOOST_SIGNALS_PARMS) const;
+
+    Combiner& combiner()
+    { return *unsafe_any_cast<Combiner>(&impl->combiner_); }
+
+    const Combiner& combiner() const
+    { return *unsafe_any_cast<const Combiner>(&impl->combiner_); }
+  };
+
+  template<
+    typename R,
+    BOOST_SIGNALS_TEMPLATE_PARMS
+    BOOST_SIGNALS_COMMA_IF_NONZERO_ARGS
+    typename Combiner,
+    typename Group,
+    typename GroupCompare,
+    typename SlotFunction
+  >
+  BOOST_SIGNALS_NAMESPACE::connection
+  BOOST_SIGNALS_SIGNAL<
+    R, BOOST_SIGNALS_TEMPLATE_ARGS
+    BOOST_SIGNALS_COMMA_IF_NONZERO_ARGS
+    Combiner, Group, GroupCompare, SlotFunction
+  >::connect(const slot_type& in_slot,
+             BOOST_SIGNALS_NAMESPACE::connect_position at)
+  {
+    using boost::BOOST_SIGNALS_NAMESPACE::detail::stored_group;
+
+    // If the slot has been disconnected, just return a disconnected
+    // connection
+    if (!in_slot.is_active()) {
+      return BOOST_SIGNALS_NAMESPACE::connection();
+    }
+
+    return impl->connect_slot(in_slot.get_slot_function(), stored_group(),
+                              in_slot.get_data(), at);
+  }
+
+  template<
+    typename R,
+    BOOST_SIGNALS_TEMPLATE_PARMS
+    BOOST_SIGNALS_COMMA_IF_NONZERO_ARGS
+    typename Combiner,
+    typename Group,
+    typename GroupCompare,
+    typename SlotFunction
+  >
+  BOOST_SIGNALS_NAMESPACE::connection
+  BOOST_SIGNALS_SIGNAL<
+    R, BOOST_SIGNALS_TEMPLATE_ARGS
+    BOOST_SIGNALS_COMMA_IF_NONZERO_ARGS
+    Combiner, Group, GroupCompare, SlotFunction
+  >::connect(const group_type& group,
+             const slot_type& in_slot,
+             BOOST_SIGNALS_NAMESPACE::connect_position at)
+  {
+    // If the slot has been disconnected, just return a disconnected
+    // connection
+    if (!in_slot.is_active()) {
+      return BOOST_SIGNALS_NAMESPACE::connection();
+    }
+
+    return impl->connect_slot(in_slot.get_slot_function(), group,
+                              in_slot.get_data(), at);
+  }
+
+  template<
+    typename R,
+    BOOST_SIGNALS_TEMPLATE_PARMS
+    BOOST_SIGNALS_COMMA_IF_NONZERO_ARGS
+    typename Combiner,
+    typename Group,
+    typename GroupCompare,
+    typename SlotFunction
+  >
+  typename BOOST_SIGNALS_SIGNAL<
+             R, BOOST_SIGNALS_TEMPLATE_ARGS
+             BOOST_SIGNALS_COMMA_IF_NONZERO_ARGS
+             Combiner, Group, GroupCompare, SlotFunction>::result_type
+  BOOST_SIGNALS_SIGNAL<
+    R, BOOST_SIGNALS_TEMPLATE_ARGS
+    BOOST_SIGNALS_COMMA_IF_NONZERO_ARGS
+    Combiner, Group, GroupCompare, SlotFunction
+  >::operator()(BOOST_SIGNALS_PARMS)
+  {
+    // Notify the slot handling code that we are making a call
+    BOOST_SIGNALS_NAMESPACE::detail::call_notification notification(this->impl);
+
+    // Construct a function object that will call the underlying slots
+    // with the given arguments.
+#if BOOST_SIGNALS_NUM_ARGS == 0
+    BOOST_SIGNALS_ARGS_STRUCT_INST args;
+#else
+    BOOST_SIGNALS_ARGS_STRUCT_INST args(BOOST_SIGNALS_ARGS);
+#endif // BOOST_SIGNALS_NUM_ARGS > 0
+    call_bound_slot f(&args);
+
+    typedef typename call_bound_slot::result_type call_result_type;
+    optional<call_result_type> cache;
+    // Let the combiner call the slots via a pair of input iterators
+    return combiner()(slot_call_iterator(notification.impl->slots_.begin(),
+                                         impl->slots_.end(), f, cache),
+                      slot_call_iterator(notification.impl->slots_.end(),
+                                         impl->slots_.end(), f, cache));
+  }
+
+  template<
+    typename R,
+    BOOST_SIGNALS_TEMPLATE_PARMS
+    BOOST_SIGNALS_COMMA_IF_NONZERO_ARGS
+    typename Combiner,
+    typename Group,
+    typename GroupCompare,
+    typename SlotFunction
+  >
+  typename BOOST_SIGNALS_SIGNAL<
+             R, BOOST_SIGNALS_TEMPLATE_ARGS
+             BOOST_SIGNALS_COMMA_IF_NONZERO_ARGS
+             Combiner, Group, GroupCompare, SlotFunction>::result_type
+  BOOST_SIGNALS_SIGNAL<
+    R, BOOST_SIGNALS_TEMPLATE_ARGS
+    BOOST_SIGNALS_COMMA_IF_NONZERO_ARGS
+    Combiner, Group, GroupCompare, SlotFunction
+  >::operator()(BOOST_SIGNALS_PARMS) const
+  {
+    // Notify the slot handling code that we are making a call
+    BOOST_SIGNALS_NAMESPACE::detail::call_notification notification(this->impl);
+
+    // Construct a function object that will call the underlying slots
+    // with the given arguments.
+#if BOOST_SIGNALS_NUM_ARGS == 0
+    BOOST_SIGNALS_ARGS_STRUCT_INST args;
+#else
+    BOOST_SIGNALS_ARGS_STRUCT_INST args(BOOST_SIGNALS_ARGS);
+#endif // BOOST_SIGNALS_NUM_ARGS > 0
+
+    call_bound_slot f(&args);
+
+    typedef typename call_bound_slot::result_type call_result_type;
+    optional<call_result_type> cache;
+
+    // Let the combiner call the slots via a pair of input iterators
+    return combiner()(slot_call_iterator(notification.impl->slots_.begin(),
+                                         impl->slots_.end(), f, cache),
+                      slot_call_iterator(notification.impl->slots_.end(),
+                                         impl->slots_.end(), f, cache));
+  }
+} // namespace boost
+
+#undef BOOST_SIGNAL_FUNCTION_N_HEADER
+#undef BOOST_SIGNALS_ARGS_STRUCT_INST
+#undef BOOST_SIGNALS_CALL_BOUND
+#undef BOOST_SIGNALS_ARGS_STRUCT
+#undef BOOST_SIGNALS_FUNCTION
+#undef BOOST_SIGNALS_SIGNAL
+#undef BOOST_SIGNALS_COMMA_IF_NONZERO_ARGS
+
+#ifdef BOOST_HAS_ABI_HEADERS
+#  include BOOST_ABI_SUFFIX
+#endif