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52 lines
1.9 KiB
C++
52 lines
1.9 KiB
C++
/*
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Copyright (c) 2009 KJK::Hyperion
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Permission is hereby granted, free of charge, to any person obtaining a
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copy of this software and associated documentation files (the "Software"),
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to deal in the Software without restriction, including without limitation
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the rights to use, copy, modify, merge, publish, distribute, sublicense,
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and/or sell copies of the Software, and to permit persons to whom the
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Software is furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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DEALINGS IN THE SOFTWARE.
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*/
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#ifndef KJK_NULL_OUTPUT_ITERATOR_H_
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#define KJK_NULL_OUTPUT_ITERATOR_H_
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#include <cstddef>
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#include <iterator>
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namespace kjk
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{
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template<class Type>
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struct null_output_reference
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{
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const Type& operator=(const Type& x) { return x; }
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};
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template<class Type, class Distance = std::ptrdiff_t, class Pointer = Type *>
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struct null_output_iterator: public std::iterator<std::output_iterator_tag, Type, Distance, Pointer, null_output_reference<Type> >
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{
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null_output_iterator() {}
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null_output_iterator(const null_output_iterator&) {}
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const null_output_iterator& operator=(const null_output_iterator&) { return *this; }
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const null_output_iterator& operator++() { return *this; }
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null_output_iterator operator++(int) { return null_output_iterator(); }
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null_output_reference<Type> operator*() { return null_output_reference<Type>(); }
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};
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}
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#endif
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// EOF
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