53 lines
1.7 KiB
C++
53 lines
1.7 KiB
C++
// Copyright (C) 2005 Laboratoire d'Informatique de Paris 6 (LIP6),
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// département Systèmes Répartis Coopératifs (SRC), Université Pierre
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// et Marie Curie.
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//
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// This file is part of Spot, a model checking library.
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//
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// Spot is free software; you can redistribute it and/or modify it
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// under the terms of the GNU General Public License as published by
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// the Free Software Foundation; either version 2 of the License, or
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// (at your option) any later version.
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//
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// Spot is distributed in the hope that it will be useful, but WITHOUT
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// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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// or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
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// License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with Spot; see the file COPYING. If not, write to the Free
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// Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
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// 02111-1307, USA.
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#ifndef SPOT_MISC_LTSTR_HH
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# define SPOT_MISC_LTSTR_HH
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# include <cstring>
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# include <functional>
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namespace spot
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{
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/// \brief Strict Weak Ordering for \c char*.
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/// \ingroup misc_tools
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///
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/// This is meant to be used as a comparison functor for
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/// STL \c map whose key are of type <code>const char*</code>.
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///
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/// For instance here is how one could declare
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/// a map of <code>const state*</code>.
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/// \code
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/// std::map<const char*, int, spot::state_ptr_less_than> seen;
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/// \endcode
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struct char_ptr_less_than:
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public std::binary_function<const char*, const char*, bool>
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{
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bool
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operator()(const char* left, const char* right) const
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{
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return strcmp(left, right) < 0;
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}
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};
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}
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#endif // SPOT_MISC_LTSTR_HH
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