gcc/libstdc++-v3/include/debug/bitset

// Debugging bitset implementation -*- C++ -*-

// Copyright (C) 2003
// 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 2, 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.

// You should have received a copy of the GNU General Public License along
// with this library; see the file COPYING.  If not, write to the Free
// Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
// USA.

// As a special exception, you may use this file as part of a free software
// library without restriction.  Specifically, if other files instantiate
// templates or use macros or inline functions from this file, or you compile
// this file and link it with other files to produce an executable, this
// file does not by itself cause the resulting executable to be covered by
// the GNU General Public License.  This exception does not however
// invalidate any other reasons why the executable file might be covered by
// the GNU General Public License.

#ifndef _GLIBCXX_DEBUG_BITSET
#define _GLIBCXX_DEBUG_BITSET

#include <bitset>
#include <debug/safe_sequence.h>
#include <debug/safe_iterator.h>

namespace __gnu_debug_def
{ 
  template<size_t _Nb> 
    class bitset
    : public __gnu_norm::bitset<_Nb>, public __gnu_debug::_Safe_sequence_base
    {
      typedef  __gnu_norm::bitset<_Nb> 	   	_Base;
      typedef __gnu_debug::_Safe_sequence_base  _Safe_base;

    public:
      // bit reference:
      class reference 
      : private _Base::reference, public __gnu_debug::_Safe_iterator_base
      {
	typedef typename _Base::reference _Base_ref;

	friend class bitset;
	reference();
	
	reference(const _Base_ref& __base, bitset* __seq) 
	: _Base_ref(__base), _Safe_iterator_base(__seq, false)
	{ }

      public:
	reference(const reference& __x)
	: _Base_ref(__x), _Safe_iterator_base(__x, false)
	{ }

	reference& 
	operator=(bool __x)
	{
	  _GLIBCXX_DEBUG_VERIFY(! this->_M_singular(),
			      _M_message(::__gnu_debug::__msg_bad_bitset_write)
				._M_iterator(*this));
	  *static_cast<_Base_ref*>(this) = __x;
	  return *this;
	}

	reference& 
	operator=(const reference& __x)
	{
	  _GLIBCXX_DEBUG_VERIFY(! __x._M_singular(),
			       _M_message(::__gnu_debug::__msg_bad_bitset_read)
				._M_iterator(__x));
	  _GLIBCXX_DEBUG_VERIFY(! this->_M_singular(),
			      _M_message(::__gnu_debug::__msg_bad_bitset_write)
				._M_iterator(*this));
	  *static_cast<_Base_ref*>(this) = __x;
	  return *this;
	}
	
	bool 
	operator~() const
	{
	  _GLIBCXX_DEBUG_VERIFY(! this->_M_singular(),
			       _M_message(::__gnu_debug::__msg_bad_bitset_read)
				._M_iterator(*this));
	  return ~(*static_cast<const _Base_ref*>(this));
	}
	
	operator bool() const
	{
	  _GLIBCXX_DEBUG_VERIFY(! this->_M_singular(),
			      _M_message(::__gnu_debug::__msg_bad_bitset_read)
				._M_iterator(*this));
	  return *static_cast<const _Base_ref*>(this);
	}
	
	reference& 
	flip()
	{
	  _GLIBCXX_DEBUG_VERIFY(! this->_M_singular(),
			      _M_message(::__gnu_debug::__msg_bad_bitset_flip)
				._M_iterator(*this));
	  _Base_ref::flip();
	  return *this;
	}
      };

      // 23.3.5.1 constructors:
      bitset() : _Base() { }
      
      bitset(unsigned long __val) : _Base(__val) { }
      
      template<typename _CharT, typename _Traits, typename _Allocator>
        explicit 
        bitset(const std::basic_string<_CharT,_Traits,_Allocator>& __str,
	       typename std::basic_string<_CharT,_Traits,_Allocator>::size_type
	       __pos = 0,
	       typename std::basic_string<_CharT,_Traits,_Allocator>::size_type
  	       __n = (std::basic_string<_CharT,_Traits,_Allocator>::npos))
	: _Base(__str, __pos, __n) { }

      bitset(const _Base& __x) : _Base(__x), _Safe_base() { }

      // 23.3.5.2 bitset operations:
      bitset<_Nb>& 
      operator&=(const bitset<_Nb>& __rhs)
      {
	_M_base() &= __rhs;
	return *this;
      }
      
      bitset<_Nb>& 
      operator|=(const bitset<_Nb>& __rhs)
      {
	_M_base() != __rhs;
	return *this;
      }
      
      bitset<_Nb>& 
      operator^=(const bitset<_Nb>& __rhs)
      {
	_M_base() ^= __rhs;
	return *this;
      }
      
      bitset<_Nb>& 
      operator<<=(size_t __pos)
      {
	_M_base() <<= __pos;
	return *this;
      }
      
      bitset<_Nb>& 
      operator>>=(size_t __pos)
      {
	_M_base() >>= __pos;
	return *this;
      }
      
      bitset<_Nb>& 
      set()
      {
	_Base::set();
	return *this;
      }
      
      // _GLIBCXX_RESOLVE_LIB_DEFECTS
      // 186. bitset::set() second parameter should be bool 
      bitset<_Nb>& 
      set(size_t __pos, bool __val = true)
      {
	_Base::set(__pos, __val);
	return *this;
      }
      
      bitset<_Nb>& 
      reset()
      {
	_Base::reset();
	return *this;
      }
      
      bitset<_Nb>& 
      reset(size_t __pos)
      {
	_Base::reset(__pos);
	return *this;
      }
      
      bitset<_Nb> operator~() const { return bitset(~_M_base()); }
      
      bitset<_Nb>& 
      flip()
      {
	_Base::flip();
	return *this;
      }
      
      bitset<_Nb>& 
      flip(size_t __pos)
      {
	_Base::flip(__pos);
	return *this;
      }
      
      // element access:
      // _GLIBCXX_RESOLVE_LIB_DEFECTS
      // 11. Bitset minor problems 
      reference 
      operator[](size_t __pos)
      { 
	__glibcxx_check_subscript(__pos);
	return reference(_M_base()[__pos], this); 
      }
      
      // _GLIBCXX_RESOLVE_LIB_DEFECTS
      // 11. Bitset minor problems 
      bool 
      operator[](size_t __pos) const 
      { 
	__glibcxx_check_subscript(__pos);
	return _M_base()[__pos]; 
      }
      
      using _Base::to_ulong;
      
      template <typename _CharT, typename _Traits, typename _Allocator>
        std::basic_string<_CharT, _Traits, _Allocator> 
        to_string() const
        { return _M_base().template to_string<_CharT, _Traits, _Allocator>(); }
      
      using _Base::count;
      using _Base::size;
      
      bool 
      operator==(const bitset<_Nb>& __rhs) const
      { return _M_base() == __rhs; }

      bool 
      operator!=(const bitset<_Nb>& __rhs) const
      { return _M_base() != __rhs; }
      
      using _Base::test;
      using _Base::any;
      using _Base::none;
      
      bitset<_Nb> 
      operator<<(size_t __pos) const
      { return bitset<_Nb>(_M_base() << __pos); }
      
      bitset<_Nb> 
      operator>>(size_t __pos) const
      { return bitset<_Nb>(_M_base() >> __pos); }
      
      _Base&       
      _M_base() { return *this; }

      const _Base& 
      _M_base() const { return *this; }
    };
 
  template<size_t _Nb>
    bitset<_Nb> 
    operator&(const bitset<_Nb>& __x, const bitset<_Nb>& __y)
    { return bitset<_Nb>(__x) &= __y; }
  
  template<size_t _Nb>
    bitset<_Nb> 
    operator|(const bitset<_Nb>& __x, const bitset<_Nb>& __y)
    { return bitset<_Nb>(__x) |= __y; }

  template<size_t _Nb>
    bitset<_Nb> 
    operator^(const bitset<_Nb>& __x, const bitset<_Nb>& __y)
    { return bitset<_Nb>(__x) ^= __y; }

  template<typename _CharT, typename _Traits, size_t _Nb>
    std::basic_istream<_CharT, _Traits>&
    operator>>(std::basic_istream<_CharT, _Traits>& __is, bitset<_Nb>& __x)
    { return __is >> __x._M_base(); }

  template<typename _CharT, typename _Traits, size_t _Nb>
    std::basic_ostream<_CharT, _Traits>&
    operator<<(std::basic_ostream<_CharT, _Traits>& __os, 
	       const bitset<_Nb>& __x)
    { return __os << __x._M_base(); }
} // namespace __gnu_debug_def

#endif