Imported gcc-4.4.3

[msp430-gcc.git] / libstdc++-v3 / include / ext / pb_ds / detail / eq_fn / eq_by_less.hpp

diff --git a/libstdc++-v3/include/ext/pb_ds/detail/eq_fn/eq_by_less.hpp b/libstdc++-v3/include/ext/pb_ds/detail/eq_fn/eq_by_less.hpp
new file mode 100644 (file)
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--- /dev/null
+++ b/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