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Diffstat (limited to '3rdParty/Boost/src/boost/signals/detail/slot_call_iterator.hpp')
-rw-r--r-- | 3rdParty/Boost/src/boost/signals/detail/slot_call_iterator.hpp | 95 |
1 files changed, 95 insertions, 0 deletions
diff --git a/3rdParty/Boost/src/boost/signals/detail/slot_call_iterator.hpp b/3rdParty/Boost/src/boost/signals/detail/slot_call_iterator.hpp new file mode 100644 index 0000000..c6706be --- /dev/null +++ b/3rdParty/Boost/src/boost/signals/detail/slot_call_iterator.hpp @@ -0,0 +1,95 @@ +// 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 + +#ifndef BOOST_SIGNALS_SLOT_CALL_ITERATOR +#define BOOST_SIGNALS_SLOT_CALL_ITERATOR + +#include <memory> +#include <boost/iterator/iterator_facade.hpp> +#include <boost/smart_ptr.hpp> +#include <boost/signals/detail/config.hpp> +#include <boost/signals/connection.hpp> +#include <boost/optional.hpp> + +#ifdef BOOST_HAS_ABI_HEADERS +# include BOOST_ABI_PREFIX +#endif + +namespace boost { + namespace BOOST_SIGNALS_NAMESPACE { + namespace detail { + + // Generates a slot call iterator. Essentially, this is an iterator that: + // - skips over disconnected slots in the underlying list + // - calls the connected slots when dereferenced + // - caches the result of calling the slots + template<typename Function, typename Iterator> + class slot_call_iterator + : public iterator_facade<slot_call_iterator<Function, Iterator>, + typename Function::result_type, + single_pass_traversal_tag, + typename Function::result_type const&> + { + typedef iterator_facade<slot_call_iterator<Function, Iterator>, + typename Function::result_type, + single_pass_traversal_tag, + typename Function::result_type const&> + inherited; + + typedef typename Function::result_type result_type; + + friend class iterator_core_access; + + public: + slot_call_iterator(Iterator iter_in, Iterator end_in, Function f, + optional<result_type> &c) + : iter(iter_in), end(end_in), f(f), cache(&c) + { + iter = std::find_if(iter, end, is_callable()); + } + + typename inherited::reference + dereference() const + { + if (!cache->is_initialized()) { + cache->reset(f(*iter)); + } + + return cache->get(); + } + + void increment() + { + iter = std::find_if(++iter, end, is_callable()); + cache->reset(); + } + + bool equal(const slot_call_iterator& other) const + { + iter = std::find_if(iter, end, is_callable()); + other.iter = std::find_if(other.iter, other.end, + is_callable()); + return iter == other.iter; + } + + private: + mutable Iterator iter; + Iterator end; + Function f; + optional<result_type>* cache; + }; + } // end namespace detail + } // end namespace BOOST_SIGNALS_NAMESPACE +} // end namespace boost + +#ifdef BOOST_HAS_ABI_HEADERS +# include BOOST_ABI_SUFFIX +#endif + +#endif // BOOST_SIGNALS_SLOT_CALL_ITERATOR |