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// -*- C++ -*-
// Copyright (C) 2005-2018 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 binary_heap_/entry_cmp.hpp
* Contains an implementation class for a binary_heap.
*/
#ifndef PB_DS_BINARY_HEAP_ENTRY_CMP_HPP
#define PB_DS_BINARY_HEAP_ENTRY_CMP_HPP
namespace __gnu_pbds
{
namespace detail
{
/// Entry compare, primary template.
template<typename _VTp, typename Cmp_Fn, typename _Alloc, bool No_Throw>
struct entry_cmp;
/// Specialization, true.
template<typename _VTp, typename Cmp_Fn, typename _Alloc>
struct entry_cmp<_VTp, Cmp_Fn, _Alloc, true>
{
/// Compare.
typedef Cmp_Fn type;
};
/// Specialization, false.
template<typename _VTp, typename Cmp_Fn, typename _Alloc>
struct entry_cmp<_VTp, Cmp_Fn, _Alloc, false>
{
private:
typedef typename _Alloc::template rebind<_VTp> __rebind_v;
public:
typedef typename __rebind_v::other::const_pointer entry;
/// Compare plus entry.
struct type : public Cmp_Fn
{
type() { }
type(const Cmp_Fn& other) : Cmp_Fn(other) { }
bool
operator()(entry lhs, entry rhs) const
{ return Cmp_Fn::operator()(*lhs, *rhs); }
};
};
} // namespace detail
} // namespace __gnu_pbds
#endif // #ifndef PB_DS_BINARY_HEAP_ENTRY_CMP_HPP
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