author | Simon Howkins <simonh@symbian.org> |
Thu, 28 Oct 2010 12:05:33 +0100 | |
branch | RCL_3 |
changeset 78 | 5b3c983434ca |
parent 0 | e4d67989cc36 |
permissions | -rw-r--r-- |
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// Boost.Signals library |
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// Copyright Douglas Gregor 2001-2004. Use, modification and |
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// distribution is subject to the Boost Software License, Version |
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// 1.0. (See accompanying file LICENSE_1_0.txt or copy at |
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// http://www.boost.org/LICENSE_1_0.txt) |
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// For more information, see http://www.boost.org |
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// This file intentionally does not have include guards, because it is meant |
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// to be included multiple times (one for each signalN class). The |
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// BOOST_SIGNALS_SIGNAL_TEMPLATE_HEADER_INCLUDED macro merely serves to |
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// suppress reinclusion of the files that this header depends on. |
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#ifndef BOOST_SIGNALS_SIGNAL_TEMPLATE_HEADER_INCLUDED |
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#define BOOST_SIGNALS_SIGNAL_TEMPLATE_HEADER_INCLUDED |
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# include <boost/config.hpp> |
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# include <boost/signals/connection.hpp> |
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# include <boost/utility.hpp> |
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# include <boost/ref.hpp> |
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# include <boost/signals/slot.hpp> |
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# include <boost/last_value.hpp> |
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# include <boost/signals/detail/signal_base.hpp> |
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# include <boost/signals/detail/slot_call_iterator.hpp> |
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# include <boost/mpl/bool.hpp> |
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# include <boost/type_traits/is_convertible.hpp> |
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# include <cassert> |
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# include <functional> |
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# include <memory> |
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#endif // !BOOST_SIGNALS_SIGNAL_TEMPLATE_HEADER_INCLUDED |
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#ifdef BOOST_HAS_ABI_HEADERS |
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# include BOOST_ABI_PREFIX |
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#endif |
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// Include the appropriate functionN header |
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#define BOOST_SIGNAL_FUNCTION_N_HEADER BOOST_JOIN(<boost/function/function,BOOST_SIGNALS_NUM_ARGS.hpp>) |
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#include BOOST_SIGNAL_FUNCTION_N_HEADER |
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// Determine if a comma should follow a listing of the arguments/parameters |
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#if BOOST_SIGNALS_NUM_ARGS == 0 |
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# define BOOST_SIGNALS_COMMA_IF_NONZERO_ARGS |
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#else |
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# define BOOST_SIGNALS_COMMA_IF_NONZERO_ARGS , |
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#endif // BOOST_SIGNALS_NUM_ARGS > 0 |
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// Define class names used |
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#define BOOST_SIGNALS_SIGNAL BOOST_JOIN(signal,BOOST_SIGNALS_NUM_ARGS) |
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#define BOOST_SIGNALS_FUNCTION BOOST_JOIN(function,BOOST_SIGNALS_NUM_ARGS) |
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#define BOOST_SIGNALS_ARGS_STRUCT BOOST_JOIN(args,BOOST_SIGNALS_NUM_ARGS) |
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#define BOOST_SIGNALS_CALL_BOUND BOOST_JOIN(call_bound,BOOST_SIGNALS_NUM_ARGS) |
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// Define commonly-used instantiations |
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#define BOOST_SIGNALS_ARGS_STRUCT_INST \ |
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BOOST_SIGNALS_NAMESPACE::detail::BOOST_SIGNALS_ARGS_STRUCT<BOOST_SIGNALS_TEMPLATE_ARGS> |
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namespace boost { |
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namespace BOOST_SIGNALS_NAMESPACE { |
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namespace detail { |
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// Holds the arguments for a bound slot call in a single place |
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template<BOOST_SIGNALS_TEMPLATE_PARMS |
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BOOST_SIGNALS_COMMA_IF_NONZERO_ARGS |
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typename Dummy = int> |
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struct BOOST_SIGNALS_ARGS_STRUCT { |
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BOOST_SIGNALS_ARGS_STRUCT(BOOST_SIGNALS_COPY_PARMS) |
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BOOST_SIGNALS_INIT_ARGS |
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{ |
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} |
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BOOST_SIGNALS_ARGS_AS_MEMBERS |
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}; |
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// Function object that calls the function object given to it, passing |
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// the bound arguments along to that underlying function object |
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template<typename R> |
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struct BOOST_SIGNALS_CALL_BOUND { |
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template<BOOST_SIGNALS_TEMPLATE_PARMS |
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BOOST_SIGNALS_COMMA_IF_NONZERO_ARGS |
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typename F> |
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struct caller { |
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typedef BOOST_SIGNALS_ARGS_STRUCT<BOOST_SIGNALS_TEMPLATE_ARGS>* |
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args_type; |
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args_type args; |
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typedef R result_type; |
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caller() {} |
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caller(args_type a) : args(a) {} |
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template<typename Pair> |
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R operator()(const Pair& slot) const |
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{ |
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F* target = const_cast<F*>(unsafe_any_cast<F>(&slot.second)); |
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return (*target)(BOOST_SIGNALS_BOUND_ARGS); |
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} |
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}; |
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}; |
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template<> |
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struct BOOST_SIGNALS_CALL_BOUND<void> { |
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template<BOOST_SIGNALS_TEMPLATE_PARMS |
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BOOST_SIGNALS_COMMA_IF_NONZERO_ARGS |
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typename F> |
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struct caller { |
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typedef BOOST_SIGNALS_ARGS_STRUCT<BOOST_SIGNALS_TEMPLATE_ARGS>* |
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args_type; |
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args_type args; |
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typedef unusable result_type; |
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112 |
|
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caller(args_type a) : args(a) {} |
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114 |
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template<typename Pair> |
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unusable operator()(const Pair& slot) const |
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{ |
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F* target = const_cast<F*>(unsafe_any_cast<F>(&slot.second)); |
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(*target)(BOOST_SIGNALS_BOUND_ARGS); |
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return unusable(); |
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} |
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}; |
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}; |
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} // namespace detail |
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} // namespace BOOST_SIGNALS_NAMESPACE |
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126 |
|
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// The actual signalN class |
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template< |
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typename R, |
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BOOST_SIGNALS_TEMPLATE_PARMS |
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BOOST_SIGNALS_COMMA_IF_NONZERO_ARGS |
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typename Combiner = last_value<R>, |
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typename Group = int, |
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typename GroupCompare = std::less<Group>, |
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typename SlotFunction = BOOST_SIGNALS_FUNCTION< |
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R BOOST_SIGNALS_COMMA_IF_NONZERO_ARGS |
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BOOST_SIGNALS_TEMPLATE_ARGS> |
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> |
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class BOOST_SIGNALS_SIGNAL : |
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public BOOST_SIGNALS_NAMESPACE::detail::signal_base, // management of slot list |
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public BOOST_SIGNALS_NAMESPACE::trackable // signals are trackable |
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{ |
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public: |
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// The slot function type |
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typedef SlotFunction slot_function_type; |
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146 |
|
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// Result type of a slot |
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typedef typename BOOST_SIGNALS_NAMESPACE::detail::slot_result_type<R>::type |
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slot_result_type; |
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150 |
|
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// Argument types |
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BOOST_SIGNALS_ARG_TYPES |
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153 |
|
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#if BOOST_SIGNALS_NUM_ARGS == 1 |
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typedef T1 argument_type; |
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#elif BOOST_SIGNALS_NUM_ARGS == 2 |
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typedef T1 first_argument_type; |
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typedef T2 second_argument_type; |
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#endif |
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160 |
|
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private: |
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// The real slot name comparison object type |
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typedef BOOST_SIGNALS_NAMESPACE::detail::group_bridge_compare<GroupCompare, Group> |
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real_group_compare_type; |
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165 |
|
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// The function object passed to the slot call iterator that will call |
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// the underlying slot function with its arguments bound |
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typedef BOOST_SIGNALS_NAMESPACE::detail::BOOST_SIGNALS_CALL_BOUND<R> |
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outer_bound_slot_caller; |
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typedef typename outer_bound_slot_caller::template |
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caller<BOOST_SIGNALS_TEMPLATE_ARGS |
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BOOST_SIGNALS_COMMA_IF_NONZERO_ARGS |
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slot_function_type> |
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call_bound_slot; |
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|
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public: |
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// Combiner's result type |
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typedef typename Combiner::result_type result_type; |
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|
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// Combiner type |
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typedef Combiner combiner_type; |
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|
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// Slot type |
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typedef slot<slot_function_type> slot_type; |
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|
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// Slot name type and comparison |
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typedef Group group_type; |
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typedef GroupCompare group_compare_type; |
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|
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typedef BOOST_SIGNALS_NAMESPACE::detail::slot_call_iterator< |
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call_bound_slot, iterator> slot_call_iterator; |
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|
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explicit |
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BOOST_SIGNALS_SIGNAL(const Combiner& c = Combiner(), |
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const GroupCompare& comp = GroupCompare()) : |
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BOOST_SIGNALS_NAMESPACE::detail::signal_base(real_group_compare_type(comp), |
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c) |
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{ |
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} |
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200 |
|
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// Connect a slot to this signal |
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BOOST_SIGNALS_NAMESPACE::connection |
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connect(const slot_type&, |
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BOOST_SIGNALS_NAMESPACE::connect_position at |
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= BOOST_SIGNALS_NAMESPACE::at_back); |
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|
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BOOST_SIGNALS_NAMESPACE::connection |
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connect(const group_type&, const slot_type&, |
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BOOST_SIGNALS_NAMESPACE::connect_position at |
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= BOOST_SIGNALS_NAMESPACE::at_back); |
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#if BOOST_WORKAROUND(BOOST_MSVC, <= 1300) |
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// MSVC 6.0 and 7.0 don't handle the is_convertible test well |
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void disconnect(const group_type& group) |
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{ |
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impl->disconnect(group); |
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} |
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#else |
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template<typename T> |
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void disconnect(const T& t) |
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{ |
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typedef mpl::bool_<(is_convertible<T, group_type>::value)> is_group; |
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this->do_disconnect(t, is_group()); |
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} |
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|
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private: |
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// Disconnect a named slot |
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void do_disconnect(const group_type& group, mpl::bool_<true>) |
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{ |
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impl->disconnect(group); |
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} |
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template<typename Function> |
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void do_disconnect(const Function& f, mpl::bool_<false>) |
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{ |
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// Notify the slot handling code that we are iterating through the slots |
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BOOST_SIGNALS_NAMESPACE::detail::call_notification notification(this->impl); |
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for (iterator i = impl->slots_.begin(); i != impl->slots_.end(); ++i) { |
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slot_function_type& s = *unsafe_any_cast<slot_function_type>(&i->second); |
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if (s == f) i->first.disconnect(); |
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} |
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} |
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#endif |
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public: |
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// Emit the signal |
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result_type operator()(BOOST_SIGNALS_PARMS); |
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result_type operator()(BOOST_SIGNALS_PARMS) const; |
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Combiner& combiner() |
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{ return *unsafe_any_cast<Combiner>(&impl->combiner_); } |
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|
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const Combiner& combiner() const |
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{ return *unsafe_any_cast<const Combiner>(&impl->combiner_); } |
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}; |
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template< |
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typename R, |
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BOOST_SIGNALS_TEMPLATE_PARMS |
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BOOST_SIGNALS_COMMA_IF_NONZERO_ARGS |
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typename Combiner, |
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typename Group, |
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typename GroupCompare, |
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typename SlotFunction |
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> |
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BOOST_SIGNALS_NAMESPACE::connection |
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BOOST_SIGNALS_SIGNAL< |
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R, BOOST_SIGNALS_TEMPLATE_ARGS |
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BOOST_SIGNALS_COMMA_IF_NONZERO_ARGS |
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Combiner, Group, GroupCompare, SlotFunction |
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>::connect(const slot_type& in_slot, |
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BOOST_SIGNALS_NAMESPACE::connect_position at) |
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{ |
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using boost::BOOST_SIGNALS_NAMESPACE::detail::stored_group; |
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|
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// If the slot has been disconnected, just return a disconnected |
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// connection |
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if (!in_slot.is_active()) { |
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return BOOST_SIGNALS_NAMESPACE::connection(); |
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} |
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|
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return impl->connect_slot(in_slot.get_slot_function(), stored_group(), |
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in_slot.get_data(), at); |
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} |
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|
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template< |
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typename R, |
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BOOST_SIGNALS_TEMPLATE_PARMS |
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BOOST_SIGNALS_COMMA_IF_NONZERO_ARGS |
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typename Combiner, |
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typename Group, |
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typename GroupCompare, |
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typename SlotFunction |
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> |
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BOOST_SIGNALS_NAMESPACE::connection |
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BOOST_SIGNALS_SIGNAL< |
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R, BOOST_SIGNALS_TEMPLATE_ARGS |
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BOOST_SIGNALS_COMMA_IF_NONZERO_ARGS |
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Combiner, Group, GroupCompare, SlotFunction |
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>::connect(const group_type& group, |
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const slot_type& in_slot, |
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BOOST_SIGNALS_NAMESPACE::connect_position at) |
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{ |
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// If the slot has been disconnected, just return a disconnected |
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// connection |
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if (!in_slot.is_active()) { |
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return BOOST_SIGNALS_NAMESPACE::connection(); |
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} |
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|
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return impl->connect_slot(in_slot.get_slot_function(), group, |
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in_slot.get_data(), at); |
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} |
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|
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template< |
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typename R, |
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BOOST_SIGNALS_TEMPLATE_PARMS |
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BOOST_SIGNALS_COMMA_IF_NONZERO_ARGS |
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typename Combiner, |
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typename Group, |
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typename GroupCompare, |
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typename SlotFunction |
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> |
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typename BOOST_SIGNALS_SIGNAL< |
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R, BOOST_SIGNALS_TEMPLATE_ARGS |
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BOOST_SIGNALS_COMMA_IF_NONZERO_ARGS |
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Combiner, Group, GroupCompare, SlotFunction>::result_type |
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BOOST_SIGNALS_SIGNAL< |
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R, BOOST_SIGNALS_TEMPLATE_ARGS |
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BOOST_SIGNALS_COMMA_IF_NONZERO_ARGS |
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Combiner, Group, GroupCompare, SlotFunction |
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>::operator()(BOOST_SIGNALS_PARMS) |
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{ |
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// Notify the slot handling code that we are making a call |
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BOOST_SIGNALS_NAMESPACE::detail::call_notification notification(this->impl); |
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|
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// Construct a function object that will call the underlying slots |
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// with the given arguments. |
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#if BOOST_SIGNALS_NUM_ARGS == 0 |
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BOOST_SIGNALS_ARGS_STRUCT_INST args; |
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#else |
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BOOST_SIGNALS_ARGS_STRUCT_INST args(BOOST_SIGNALS_ARGS); |
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#endif // BOOST_SIGNALS_NUM_ARGS > 0 |
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call_bound_slot f(&args); |
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|
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typedef typename call_bound_slot::result_type result_type; |
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optional<result_type> cache; |
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// Let the combiner call the slots via a pair of input iterators |
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return combiner()(slot_call_iterator(notification.impl->slots_.begin(), |
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impl->slots_.end(), f, cache), |
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slot_call_iterator(notification.impl->slots_.end(), |
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impl->slots_.end(), f, cache)); |
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} |
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|
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template< |
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typename R, |
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BOOST_SIGNALS_TEMPLATE_PARMS |
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BOOST_SIGNALS_COMMA_IF_NONZERO_ARGS |
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typename Combiner, |
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typename Group, |
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typename GroupCompare, |
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typename SlotFunction |
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> |
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typename BOOST_SIGNALS_SIGNAL< |
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R, BOOST_SIGNALS_TEMPLATE_ARGS |
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BOOST_SIGNALS_COMMA_IF_NONZERO_ARGS |
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Combiner, Group, GroupCompare, SlotFunction>::result_type |
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BOOST_SIGNALS_SIGNAL< |
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R, BOOST_SIGNALS_TEMPLATE_ARGS |
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BOOST_SIGNALS_COMMA_IF_NONZERO_ARGS |
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Combiner, Group, GroupCompare, SlotFunction |
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>::operator()(BOOST_SIGNALS_PARMS) const |
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{ |
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// Notify the slot handling code that we are making a call |
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BOOST_SIGNALS_NAMESPACE::detail::call_notification notification(this->impl); |
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|
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// Construct a function object that will call the underlying slots |
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// with the given arguments. |
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#if BOOST_SIGNALS_NUM_ARGS == 0 |
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BOOST_SIGNALS_ARGS_STRUCT_INST args; |
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#else |
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BOOST_SIGNALS_ARGS_STRUCT_INST args(BOOST_SIGNALS_ARGS); |
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#endif // BOOST_SIGNALS_NUM_ARGS > 0 |
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|
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call_bound_slot f(&args); |
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|
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typedef typename call_bound_slot::result_type result_type; |
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optional<result_type> cache; |
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|
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// Let the combiner call the slots via a pair of input iterators |
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return combiner()(slot_call_iterator(notification.impl->slots_.begin(), |
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impl->slots_.end(), f, cache), |
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slot_call_iterator(notification.impl->slots_.end(), |
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impl->slots_.end(), f, cache)); |
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} |
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} // namespace boost |
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|
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#undef BOOST_SIGNAL_FUNCTION_N_HEADER |
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#undef BOOST_SIGNALS_ARGS_STRUCT_INST |
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#undef BOOST_SIGNALS_CALL_BOUND |
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#undef BOOST_SIGNALS_ARGS_STRUCT |
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#undef BOOST_SIGNALS_FUNCTION |
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#undef BOOST_SIGNALS_SIGNAL |
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#undef BOOST_SIGNALS_COMMA_IF_NONZERO_ARGS |
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|
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#ifdef BOOST_HAS_ABI_HEADERS |
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# include BOOST_ABI_SUFFIX |
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#endif |