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// -*- C++ -*- |
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// Copyright (C) 2005-2013 Free Software Foundation, Inc. |
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// |
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// This file is part of the GNU ISO C++ Library. This library is free |
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// software; you can redistribute it and/or modify it under the terms |
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// of the GNU General Public License as published by the Free Software |
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// Foundation; either version 3, or (at your option) any later |
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// version. |
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// This library is distributed in the hope that it will be useful, but |
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// WITHOUT ANY WARRANTY; without even the implied warranty of |
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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// General Public License for more details. |
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// Under Section 7 of GPL version 3, you are granted additional |
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// permissions described in the GCC Runtime Library Exception, version |
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// 3.1, as published by the Free Software Foundation. |
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// You should have received a copy of the GNU General Public License and |
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// a copy of the GCC Runtime Library Exception along with this program; |
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// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see |
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// . |
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// Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL. |
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// Permission to use, copy, modify, sell, and distribute this software |
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// is hereby granted without fee, provided that the above copyright |
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// notice appears in all copies, and that both that copyright notice |
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// and this permission notice appear in supporting documentation. None |
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// of the above authors, nor IBM Haifa Research Laboratories, make any |
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// representation about the suitability of this software for any |
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// purpose. It is provided "as is" without express or implied |
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// warranty. |
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/** |
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* @file eq_by_less.hpp |
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* Contains an equivalence function. |
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*/ |
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#ifndef PB_DS_EQ_BY_LESS_HPP |
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#define PB_DS_EQ_BY_LESS_HPP |
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#include |
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#include |
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#include |
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#include |
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#include |
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namespace __gnu_pbds |
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{ |
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namespace detail |
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{ |
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/// Equivalence function. |
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template |
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struct eq_by_less : private Cmp_Fn |
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{ |
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bool |
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operator()(const Key& r_lhs, const Key& r_rhs) const |
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{ |
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const bool l = Cmp_Fn::operator()(r_lhs, r_rhs); |
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const bool g = Cmp_Fn::operator()(r_rhs, r_lhs); |
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return !(l || g); |
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} |
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}; |
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} // namespace detail |
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} // namespace __gnu_pbds |
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#endif // #ifndef PB_DS_EQ_BY_LESS_HPP |