kea/src/bin/dhcp4/stack.hh

// A Bison parser, made by GNU Bison 3.0.4.

// Stack handling for Bison parsers in C++

// Copyright (C) 2002-2015 Free Software Foundation, Inc.

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// it under the terms of the GNU General Public License as published by
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// along with this program.  If not, see <http://www.gnu.org/licenses/>.

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// part or all of the Bison parser skeleton and distribute that work
// under terms of your choice, so long as that work isn't itself a
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/**
 ** \file stack.hh
 ** Define the isc::dhcp::stack class.
 */

#ifndef YY_PARSER4_STACK_HH_INCLUDED
# define YY_PARSER4_STACK_HH_INCLUDED

# include <vector>

#line 14 "dhcp4_parser.yy" // stack.hh:132
namespace isc { namespace dhcp {
#line 46 "stack.hh" // stack.hh:132
  template <class T, class S = std::vector<T> >
  class stack
  {
  public:
    // Hide our reversed order.
    typedef typename S::reverse_iterator iterator;
    typedef typename S::const_reverse_iterator const_iterator;

    stack ()
      : seq_ ()
    {
      seq_.reserve (200);
    }

    stack (unsigned int n)
      : seq_ (n)
    {}

    inline
    T&
    operator[] (unsigned int i)
    {
      return seq_[seq_.size () - 1 - i];
    }

    inline
    const T&
    operator[] (unsigned int i) const
    {
      return seq_[seq_.size () - 1 - i];
    }

    /// Steal the contents of \a t.
    ///
    /// Close to move-semantics.
    inline
    void
    push (T& t)
    {
      seq_.push_back (T());
      operator[](0).move (t);
    }

    inline
    void
    pop (unsigned int n = 1)
    {
      for (; n; --n)
        seq_.pop_back ();
    }

    void
    clear ()
    {
      seq_.clear ();
    }

    inline
    typename S::size_type
    size () const
    {
      return seq_.size ();
    }

    inline
    const_iterator
    begin () const
    {
      return seq_.rbegin ();
    }

    inline
    const_iterator
    end () const
    {
      return seq_.rend ();
    }

  private:
    stack (const stack&);
    stack& operator= (const stack&);
    /// The wrapped container.
    S seq_;
  };

  /// Present a slice of the top of a stack.
  template <class T, class S = stack<T> >
  class slice
  {
  public:
    slice (const S& stack, unsigned int range)
      : stack_ (stack)
      , range_ (range)
    {}

    inline
    const T&
    operator [] (unsigned int i) const
    {
      return stack_[range_ - i];
    }

  private:
    const S& stack_;
    unsigned int range_;
  };

#line 14 "dhcp4_parser.yy" // stack.hh:132
} } // isc::dhcp
#line 156 "stack.hh" // stack.hh:132

#endif // !YY_PARSER4_STACK_HH_INCLUDED