46 lines
878 B
C++
46 lines
878 B
C++
/*
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* \brief Utility for checking array bounds
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* \author Norman Feske
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* \date 2011-02-18
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*/
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/*
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* Copyright (C) 2011-2017 Genode Labs GmbH
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*
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* This file is part of the Genode OS framework, which is distributed
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* under the terms of the GNU Affero General Public License version 3.
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*/
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#ifndef _NOUX__RANGE_CHECKED_INDEX_H_
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#define _NOUX__RANGE_CHECKED_INDEX_H_
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namespace Noux {
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class Index_out_of_range { };
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template <typename> struct Range_checked_index;
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}
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template <typename T>
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struct Noux::Range_checked_index
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{
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T value;
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T const max;
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Range_checked_index(T value, T max) : value(value), max(max) { }
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Range_checked_index<T> operator++ (int)
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{
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T old_value = value;
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if (++value >= max)
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throw Index_out_of_range();
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return Range_checked_index<T>(old_value, max);
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}
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operator T () { return value; }
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};
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#endif /* _NOUX__RANGE_CHECKED_INDEX_H_ */
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