71 lines
1.7 KiB
C
71 lines
1.7 KiB
C
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/*******************************************************************************
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Copyright(C) Jonas 'Sortie' Termansen 2013.
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This file is part of Sortix.
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Sortix is free software: you can redistribute it and/or modify it under the
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terms of the GNU General Public License as published by the Free Software
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Foundation, either version 3 of the License, or (at your option) any later
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version.
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Sortix is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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details.
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You should have received a copy of the GNU General Public License along with
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Sortix. If not, see <http://www.gnu.org/licenses/>.
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sortix/kernel/yielder.h
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Template that allows creation of easily-iterable sequences.
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*******************************************************************************/
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#ifndef INCLUDE_SORTIX_KERNEL_YIELDER_H
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#define INCLUDE_SORTIX_KERNEL_YIELDER_H
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namespace Sortix {
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class finished_yielder { };
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template <class yielder_type, class yielded_type> class yielder_iterator
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{
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public:
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yielder_iterator(yielder_type yielder) : yielder_object(yielder)
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{
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has_value = yielder_object.yield(¤t_value);
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}
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bool is_finished() const
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{
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return !has_value;
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}
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bool operator!=(const yielder_iterator& other) const
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{
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return !(is_finished() && other.is_finished());
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}
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yielded_type operator*()
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{
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return current_value;
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}
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const yielder_iterator& operator++()
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{
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has_value = yielder_object.yield(¤t_value);
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return *this;
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}
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private:
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yielder_type yielder_object;
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yielded_type current_value;
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bool has_value;
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};
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} // namespace Sortix
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#endif
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