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Edit File: entry_pred.hpp

// -*- C++ -*-

// Copyright (C) 2005-2018 Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library.  This library is free
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// of the GNU General Public License as published by the Free Software
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// version.

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// General Public License for more details.

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/**
 * @file binary_heap_/entry_pred.hpp
 * Contains an implementation class for a binary_heap.
 */

#ifndef PB_DS_BINARY_HEAP_ENTRY_PRED_HPP
#define PB_DS_BINARY_HEAP_ENTRY_PRED_HPP

namespace __gnu_pbds
{
  namespace detail
  {
    /// Entry predicate primary class template.
    template<typename _VTp, typename Pred, typename _Alloc, bool No_Throw>
      struct entry_pred;

/// Specialization, true.
    template<typename _VTp, typename Pred, typename _Alloc>
      struct entry_pred<_VTp, Pred, _Alloc, true>
      {
	typedef Pred 						type;
      };

/// Specialization, false.
    template<typename _VTp, typename Pred, typename _Alloc>
      struct entry_pred<_VTp, Pred, _Alloc, false>
      {
      private:
	typedef typename _Alloc::template rebind<_VTp>		__rebind_v;

public:
	typedef typename __rebind_v::other::const_pointer	entry;

struct type : public Pred
	{
	  inline
	  type() { }

inline
	  type(const Pred& other) : Pred(other) { }

inline bool
	  operator()(entry p_v) const
	  { return Pred::operator()(*p_v); }
	};
      };
  } // namespace detail
} // namespace __gnu_pbds

#endif // #ifndef PB_DS_BINARY_HEAP_ENTRY_PRED_HPP