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Diffstat (limited to '3rdParty/Boost/src/boost/signals2/optional_last_value.hpp')
-rw-r--r-- | 3rdParty/Boost/src/boost/signals2/optional_last_value.hpp | 65 |
1 files changed, 65 insertions, 0 deletions
diff --git a/3rdParty/Boost/src/boost/signals2/optional_last_value.hpp b/3rdParty/Boost/src/boost/signals2/optional_last_value.hpp new file mode 100644 index 0000000..766e99b --- /dev/null +++ b/3rdParty/Boost/src/boost/signals2/optional_last_value.hpp @@ -0,0 +1,65 @@ +// optional_last_value function object (documented as part of Boost.Signals2) + +// Copyright Frank Mori Hess 2007-2008. +// Copyright Douglas Gregor 2001-2003. +// Distributed under 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) + +// See http://www.boost.org/libs/signals2 for library home page. + +#ifndef BOOST_SIGNALS2_OPTIONAL_LAST_VALUE_HPP +#define BOOST_SIGNALS2_OPTIONAL_LAST_VALUE_HPP + +#include <boost/optional.hpp> +#include <boost/signals2/expired_slot.hpp> + +namespace boost { + namespace signals2 { + + template<typename T> + class optional_last_value + { + public: + typedef optional<T> result_type; + + template<typename InputIterator> + optional<T> operator()(InputIterator first, InputIterator last) const + { + optional<T> value; + while (first != last) + { + try + { + value = *first; + } + catch(const expired_slot &) {} + ++first; + } + return value; + } + }; + + template<> + class optional_last_value<void> + { + public: + typedef void result_type; + template<typename InputIterator> + result_type operator()(InputIterator first, InputIterator last) const + { + while (first != last) + { + try + { + *first; + } + catch(const expired_slot &) {} + ++first; + } + return; + } + }; + } // namespace signals2 +} // namespace boost +#endif // BOOST_SIGNALS2_OPTIONAL_LAST_VALUE_HPP |