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Diffstat (limited to 'gcc-4.4.3/libstdc++-v3/include/ext/pb_ds/detail/eq_fn/eq_by_less.hpp')
| -rw-r--r-- | gcc-4.4.3/libstdc++-v3/include/ext/pb_ds/detail/eq_fn/eq_by_less.hpp | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/gcc-4.4.3/libstdc++-v3/include/ext/pb_ds/detail/eq_fn/eq_by_less.hpp b/gcc-4.4.3/libstdc++-v3/include/ext/pb_ds/detail/eq_fn/eq_by_less.hpp new file mode 100644 index 000000000..ec95bca64 --- /dev/null +++ b/gcc-4.4.3/libstdc++-v3/include/ext/pb_ds/detail/eq_fn/eq_by_less.hpp @@ -0,0 +1,68 @@ +// -*- C++ -*- + +// Copyright (C) 2005, 2006, 2009 Free Software Foundation, Inc. +// +// This file is part of the GNU ISO C++ Library. This library is free +// software; you can redistribute it and/or modify it under the terms +// of the GNU General Public License as published by the Free Software +// Foundation; either version 3, or (at your option) any later +// version. + +// This library is distributed in the hope that it will be useful, but +// WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +// General Public License for more details. + +// Under Section 7 of GPL version 3, you are granted additional +// permissions described in the GCC Runtime Library Exception, version +// 3.1, as published by the Free Software Foundation. + +// You should have received a copy of the GNU General Public License and +// a copy of the GCC Runtime Library Exception along with this program; +// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see +// <http://www.gnu.org/licenses/>. + +// Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL. + +// Permission to use, copy, modify, sell, and distribute this software +// is hereby granted without fee, provided that the above copyright +// notice appears in all copies, and that both that copyright notice +// and this permission notice appear in supporting documentation. None +// of the above authors, nor IBM Haifa Research Laboratories, make any +// representation about the suitability of this software for any +// purpose. It is provided "as is" without express or implied +// warranty. + +/** + * @file eq_by_less.hpp + * Contains an equivalence function. + */ + +#ifndef PB_DS_EQ_BY_LESS_HPP +#define PB_DS_EQ_BY_LESS_HPP + +#include <utility> +#include <functional> +#include <vector> +#include <assert.h> +#include <ext/pb_ds/detail/types_traits.hpp> + +namespace __gnu_pbds +{ + namespace detail + { + template<typename Key, class Cmp_Fn> + struct eq_by_less : private Cmp_Fn + { + bool + operator()(const Key& r_lhs, const Key& r_rhs) const + { + const bool l = Cmp_Fn::operator()(r_lhs, r_rhs); + const bool g = Cmp_Fn::operator()(r_rhs, r_lhs); + return !(l || g); + } + }; + } // namespace detail +} // namespace __gnu_pbds + +#endif // #ifndef PB_DS_EQ_BY_LESS_HPP |