const bool traps = __glibcxx_integral_traps;
      static const bool tinyness_before = false;
      static const float_round_style round_style = round_toward_zero;
    };

  /// numeric_limits<long long> specialization.
  template<>
    struct numeric_limits<long long>
    {
      static const bool is_specialized = true;

      static long long min() throw()
      { return -__LONG_LONG_MAX__ - 1; }
      static long long max() throw()
      { return __LONG_LONG_MAX__; }

      static const int digits = __glibcxx_digits (long long);
      static const int digits10 = __glibcxx_digits10 (long long);
      static const bool is_signed = true;
      static const bool is_integer = true;
      static const bool is_exact = true;
      static const int radix = 2;
      static long long epsilon() throw()
      { return 0; }
      static long long round_error() throw()
      { return 0; }

      static const int min_exponent = 0;
      static const int min_exponent10 = 0;
      static const int max_exponent = 0;
      static const int max_exponent10 = 0;

      static const bool has_infinity = false;
      static const bool has_quiet_NaN = false;
      static const bool has_signaling_NaN = false;
      static const float_denorm_style has_denorm = denorm_absent;
      static const bool has_denorm_loss = false;

      static long long infinity() throw()
      { return static_cast<long long>(0); }
      static long long quiet_NaN() throw()
      { return static_cast<long long>(0); }
      static long long signaling_NaN() throw()
      { return static_cast<long long>(0); }
      static long long denorm_min() throw()
      { return static_cast<long long>(0); }

      static const bool is_iec559 = false;
      static const bool is_bounded = true;
      static const bool is_modulo = true;

      static const bool traps = __glibcxx_integral_traps;
      static const bool tinyness_before = false;
      static const float_round_style round_style = round_toward_zero;
    };

  /// numeric_limits<unsigned long long> specialization.
  template<>
    struct numeric_limits<unsigned long long>
    {
      static const bool is_specialized = true;

      static unsigned long long min() throw()
      { return 0; }
      static unsigned long long max() throw()
      { return __LONG_LONG_MAX__ * 2ULL + 1; }

      static const int digits = __glibcxx_digits (unsigned long long);
      static const int digits10 = __glibcxx_digits10 (unsigned long long);
      static const bool is_signed = false;
      static const bool is_integer = true;
      static const bool is_exact = true;
      static const int radix = 2;
      static unsigned long long epsilon() throw()
      { return 0; }
      static unsigned long long round_error() throw()
      { return 0; }

      static const int min_exponent = 0;
      static const int min_exponent10 = 0;
      static const int max_exponent = 0;
      static const int max_exponent10 = 0;

      static const bool has_infinity = false;
      static const bool has_quiet_NaN = false;
      static const bool has_signaling_NaN = false;
      static const float_denorm_style has_denorm = denorm_absent;
      static const bool has_denorm_loss = false;

      static unsigned long long infinity() throw()
      { return static_cast<unsigned long long>(0); }
      static unsigned long long quiet_NaN() throw()
      { return static_cast<unsigned long long>(0); }
      static unsigned long long signaling_NaN() throw()
      { return static_cast<unsigned long long>(0); }
      static unsigned long long denorm_min() throw()
      { return static_cast<unsigned long long>(0); }

      static const bool is_iec559 = false;
      static const bool is_bounded = true;
      static const bool is_modulo = true;

      static const bool traps = __glibcxx_integral_traps;
      static const bool tinyness_before = false;
      static const float_round_style round_style = round_toward_zero;
    };

  /// numeric_limits<float> specialization.
  template<>
    struct numeric_limits<float>
    {
      static const bool is_specialized = true;

      static float min() throw()
      { return __FLT_MIN__; }
      static float max() throw()
      { return __FLT_MAX__; }

      static const int digits = __FLT_MANT_DIG__;
      static const int digits10 = __FLT_DIG__;
      static const bool is_signed = true;
      static const bool is_integer = false;
      static const bool is_exact = false;
      static const int radix = __FLT_RADIX__;
      static float epsilon() throw()
      { return __FLT_EPSILON__; }
      static float round_error() throw()
      { return 0.5F; }

      static const int min_exponent = __FLT_MIN_EXP__;
      static const int min_exponent10 = __FLT_MIN_10_EXP__;
      static const int max_exponent = __FLT_MAX_EXP__;
      static const int max_exponent10 = __FLT_MAX_10_EXP__;

      static const bool has_infinity = __FLT_HAS_INFINITY__;
      static const bool has_quiet_NaN = __FLT_HAS_QUIET_NAN__;
      static const bool has_signaling_NaN = has_quiet_NaN;
      static const float_denorm_style has_denorm
	= bool(__FLT_HAS_DENORM__) ? denorm_present : denorm_absent;
      static const bool has_denorm_loss = __glibcxx_float_has_denorm_loss;

      static float infinity() throw()
      { return __builtin_huge_valf (); }
      static float quiet_NaN() throw()
      { return __builtin_nanf (""); }
      static float signaling_NaN() throw()
      { return __builtin_nansf (""); }
      static float denorm_min() throw()
      { return __FLT_DENORM_MIN__; }

      static const bool is_iec559
	= has_infinity && has_quiet_NaN && has_denorm == denorm_present;
      static const bool is_bounded = true;
      static const bool is_modulo = false;

      static const bool traps = __glibcxx_float_traps;
      static const bool tinyness_before = __glibcxx_float_tinyness_before;
      static const float_round_style round_style = round_to_nearest;
    };

#undef __glibcxx_float_has_denorm_loss
#undef __glibcxx_float_traps
#undef __glibcxx_float_tinyness_before

  /// numeric_limits<double> specialization.
  template<>
    struct numeric_limits<double>
    {
      static const bool is_specialized = true;

      static double min() throw()
      { return __DBL_MIN__; }
      static double max() throw()
      { return __DBL_MAX__; }

      static const int digits = __DBL_MANT_DIG__;
      static const int digits10 = __DBL_DIG__;
      static const bool is_signed = true;
      static const bool is_integer = false;
      static const bool is_exact = false;
      static const int radix = __FLT_RADIX__;
      static double epsilon() throw()
      { return __DBL_EPSILON__; }
      static double round_error() throw()
      { return 0.5; }

      static const int min_exponent = __DBL_MIN_EXP__;
      static const int min_exponent10 = __DBL_MIN_10_EXP__;
      static const int max_exponent = __DBL_MAX_EXP__;
      static const int max_exponent10 = __DBL_MAX_10_EXP__;

      static const bool has_infinity = __DBL_HAS_INFINITY__;
      static const bool has_quiet_NaN = __DBL_HAS_QUIET_NAN__;
      static const bool has_signaling_NaN = has_quiet_NaN;
      static const float_denorm_style has_denorm
	= bool(__DBL_HAS_DENORM__) ? denorm_present : denorm_absent;
      static const bool has_denorm_loss = __glibcxx_double_has_denorm_loss;

      static double infinity() throw()
      { return __builtin_huge_val(); }
      static double quiet_NaN() throw()
      { return __builtin_nan (""); }
      static double signaling_NaN() throw()
      { return __builtin_nans (""); }
      static double denorm_min() throw()
      { return __DBL_DENORM_MIN__; }

      static const bool is_iec559
	= has_infinity && has_quiet_NaN && has_denorm == denorm_present;
      static const bool is_bounded = true;
      static const bool is_modulo = false;

      static const bool traps = __glibcxx_double_traps;
      static const bool tinyness_before = __glibcxx_double_tinyness_before;
      static const float_round_style round_style = round_to_nearest;
    };

#undef __glibcxx_double_has_denorm_loss
#undef __glibcxx_double_traps
#undef __glibcxx_double_tinyness_before

  /// numeric_limits<long double> specialization.
  template<>
    struct numeric_limits<long double>
    {
      static const bool is_specialized = true;

      static long double min() throw()
      { return __LDBL_MIN__; }
      static long double max() throw()
      { return __LDBL_MAX__; }

      static const int digits = __LDBL_MANT_DIG__;
      static const int digits10 = __LDBL_DIG__;
      static const bool is_signed = true;
      static const bool is_integer = false;
      static const bool is_exact = false;
      static const int radix = __FLT_RADIX__;
      static long double epsilon() throw()
      { return __LDBL_EPSILON__; }
      static long double round_error() throw()
      { return 0.5L; }

      static const int min_exponent = __LDBL_MIN_EXP__;
      static const int min_exponent10 = __LDBL_MIN_10_EXP__;
      static const int max_exponent = __LDBL_MAX_EXP__;
      static const int max_exponent10 = __LDBL_MAX_10_EXP__;

      static const bool has_infinity = __LDBL_HAS_INFINITY__;
      static const bool has_quiet_NaN = __LDBL_HAS_QUIET_NAN__;
      static const bool has_signaling_NaN = has_quiet_NaN;
      static const float_denorm_style has_denorm
	= bool(__LDBL_HAS_DENORM__) ? denorm_present : denorm_absent;
      static const bool has_denorm_loss
	= __glibcxx_long_double_has_denorm_loss;

      static long double infinity() throw()
      { return __builtin_huge_vall (); }
      static long double quiet_NaN() throw()
      { return __builtin_nanl (""); }
      static long double signaling_NaN() throw()
      { return __builtin_nansl (""); }
      static long double denorm_min() throw()
      { return __LDBL_DENORM_MIN__; }

      static const bool is_iec559
	= has_infinity && has_quiet_NaN && has_denorm == denorm_present;
      static const bool is_bounded = true;
      static const bool is_modulo = false;

      static const bool traps = __glibcxx_long_double_traps;
      static const bool tinyness_before = __glibcxx_long_double_tinyness_before;
      static const float_round_style round_style = round_to_nearest;
    };

#undef __glibcxx_long_double_has_denorm_loss
#undef __glibcxx_long_double_traps
#undef __glibcxx_long_double_tinyness_before

_GLIBCXX_END_NAMESPACE

#undef __glibcxx_signed
#undef __glibcxx_min
#undef __glibcxx_max
#undef __glibcxx_digits
#undef __glibcxx_digits10

#endif // _GLIBCXX_NUMERIC_LIMITS
// RTTI support for -*- C++ -*-
// Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002,
// 2003, 2004, 2005, 2006, 2007
// Free Software Foundation
//
// This file is part of GCC.
//
// GCC 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.
// 
// GCC 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 GCC; see the file COPYING.  If not, write to
// the Free Software Foundation, 51 Franklin Street, Fifth Floor,
// Boston, MA 02110-1301, 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.

/** @file typeinfo
 *  This is a Standard C++ Library header.
 */

#ifndef _TYPEINFO
#define _TYPEINFO

#include <exception>

#pragma GCC visibility push(default)

extern "C++" {

namespace __cxxabiv1
{
  class __class_type_info;
} // namespace __cxxabiv1

// Determine whether typeinfo names for the same type are merged (in which
// case comparison can just compare pointers) or not (in which case
// strings must be compared and g++.dg/abi/local1.C will fail), and
// whether comparison is to be implemented inline or not.  By default we
// use inline pointer comparison if weak symbols are available, and
// out-of-line strcmp if not.  Out-of-line pointer comparison is used
// where the object files are to be portable to multiple systems, some of
// which may not be able to use pointer comparison, but the particular
// system for which libstdc++ is being built can use pointer comparison;
// in particular for most ARM EABI systems, where the ABI specifies
// out-of-line comparison.  Inline strcmp is not currently supported.  The
// compiler's target configuration can override the defaults by defining
// __GXX_TYPEINFO_EQUALITY_INLINE to 1 or 0 to indicate whether or not
// comparison is inline, and __GXX_MERGED_TYPEINFO_NAMES to 1 or 0 to
// indicate whether or not pointer comparison can be used.

#ifndef __GXX_MERGED_TYPEINFO_NAMES
  #if !__GXX_WEAK__
    // If weak symbols are not supported, typeinfo names are not merged.
    #define __GXX_MERGED_TYPEINFO_NAMES 0
  #else
    // On platforms that support weak symbols, typeinfo names are merged.
    #define __GXX_MERGED_TYPEINFO_NAMES 1
  #endif
#endif

// By default follow the same rules as for __GXX_MERGED_TYPEINFO_NAMES.
#ifndef __GXX_TYPEINFO_EQUALITY_INLINE
  #if !__GXX_WEAK__
    #define __GXX_TYPEINFO_EQUALITY_INLINE 0
  #else
    #define __GXX_TYPEINFO_EQUALITY_INLINE 1
  #endif
#endif

namespace std 
{
  /**
   *  @brief  Part of RTTI.
   *
   *  The @c type_info class describes type information generated by
   *  an implementation.
  */
  class type_info 
  {
  public:
    /** Destructor first. Being the first non-inline virtual function, this
     *  controls in which translation unit the vtable is emitted. The
     *  compiler makes use of that information to know where to emit
     *  the runtime-mandated type_info structures in the new-abi.  */
    virtual ~type_info();

    /** Returns an @e implementation-defined byte string; this is not
     *  portable between compilers!  */
    const char* name() const
    { return __name; }

#if !__GXX_TYPEINFO_EQUALITY_INLINE
    bool before(const type_info& __arg) const;

    // In old abi, or when weak symbols are not supported, there can
    // be multiple instances of a type_info object for one
    // type. Uniqueness must use the _name value, not object address.
    bool operator==(const type_info& __arg) const;
#else
  #if !__GXX_MERGED_TYPEINFO_NAMES
    #error "Inline implementation of type_info comparision requires merging of type_info objects"
  #endif
    /** Returns true if @c *this precedes @c __arg in the implementation's
     *  collation order.  */
    // In new abi we can rely on type_info's NTBS being unique,
    // and therefore address comparisons are sufficient.
    bool before(const type_info& __arg) const
    { return __name < __arg.__name; }

    bool operator==(const type_info& __arg) const
    { return __name == __arg.__name; }
#endif
    bool operator!=(const type_info& __arg) const
    { return !operator==(__arg); }

    // Return true if this is a pointer type of some kind
    virtual bool __is_pointer_p() const;

    // Return true if this is a function type
    virtual bool __is_function_p() const;

    // Try and catch a thrown type. Store an adjusted pointer to the
    // caught type in THR_OBJ. If THR_TYPE is not a pointer type, then
    // THR_OBJ points to the thrown object. If THR_TYPE is a pointer
    // type, then THR_OBJ is the pointer itself. OUTER indicates the
    // number of outer pointers, and whether they were const
    // qualified.
    virtual bool __do_catch(const type_info *__thr_type, void **__thr_obj,
			    unsigned __outer) const;

    // Internally used during catch matching
    virtual bool __do_upcast(const __cxxabiv1::__class_type_info *__target,
			     void **__obj_ptr) const;

  protected:
    const char *__name;
    
    explicit type_info(const char *__n): __name(__n) { }
    
  private:
    /// Assigning type_info is not supported.
    type_info& operator=(const type_info&);
    type_info(const type_info&);
  };

  /**
   *  @brief  Thrown during incorrect typecasting.
   *
   *  If you attempt an invalid @c dynamic_cast expression, an instance of
   *  this class (or something derived from this class) is thrown.  */
  class bad_cast : public exception 
  {
  public:
    bad_cast() throw() { }

    // This declaration is not useless:
    // http://gcc.gnu.org/onlinedocs/gcc-3.0.2/gcc_6.html#SEC118
    virtual ~bad_cast() throw();

    // See comment in eh_exception.cc.
    virtual const char* what() const throw();
  };
  
  /** If you use a NULL pointer in a @c typeid expression, this is thrown.  */
  class bad_typeid : public exception 
  {
  public:
    bad_typeid () throw() { }

    // This declaration is not useless:
    // http://gcc.gnu.org/onlinedocs/gcc-3.0.2/gcc_6.html#SEC118
    virtual ~bad_typeid() throw();

    // See comment in eh_exception.cc.
    virtual const char* what() const throw();
  };
} // namespace std

#pragma GCC visibility pop

} // extern "C++"
#endif
„
...…
stl_multimap.h† 
boost_concept_check.h‡
functional_hash.hˆ
basic_ios.h‰
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mask_array.h‹

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stl_map.h�
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stl_tree.h�
stl_uninitialized.h‘ 
boost_sp_shared_count.h’
stl_relops.h“
stl_queue.h”
algorithmfwd.h•

stl_heap.h–
valarray_after.h—
stl_function.h˜

stl_numeric.h™

stl_bvector.hš

stl_move.h›
valarray_before.hœ	
codecvt.h�
basic_string.tccž
allocator.hŸ	
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list.tcc¡
ostream_insert.h¢	
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locale_facets_nonio.tcc¦

basic_ios.tcc§	
stl_set.h¨

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sstream.tccª
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locale_facets_nonio.h­
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vector.tcc°
gslice_array.h// Multimap implementation -*- C++ -*-

// Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008
// 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, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
// 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.

/*
 *
 * Copyright (c) 1994
 * Hewlett-Packard Company
 *
 * Permission to use, copy, modify, distribute and sell this software
 * and its documentation for any purpose is hereby granted without fee,
 * provided that the above copyright notice appear in all copies and
 * that both that copyright notice and this permission notice appear
 * in supporting documentation.  Hewlett-Packard Company makes no
 * representations about the suitability of this software for any
 * purpose.  It is provided "as is" without express or implied warranty.
 *
 *
 * Copyright (c) 1996,1997
 * Silicon Graphics Computer Systems, Inc.
 *
 * Permission to use, copy, modify, distribute and sell this software
 * and its documentation for any purpose is hereby granted without fee,
 * provided that the above copyright notice appear in all copies and
 * that both that copyright notice and this permission notice appear
 * in supporting documentation.  Silicon Graphics makes no
 * representations about the suitability of this software for any
 * purpose.  It is provided "as is" without express or implied warranty.
 */

/** @file stl_multimap.h
 *  This is an internal header file, included by other library headers.
 *  You should not attempt to use it directly.
 */

#ifndef _STL_MULTIMAP_H
#define _STL_MULTIMAP_H 1

#include <bits/concept_check.h>

_GLIBCXX_BEGIN_NESTED_NAMESPACE(std, _GLIBCXX_STD_D)

  /**
   *  @brief A standard container made up of (key,value) pairs, which can be
   *  retrieved based on a key, in logarithmic time.
   *
   *  @ingroup Containers
   *  @ingroup Assoc_containers
   *
   *  Meets the requirements of a <a href="tables.html#65">container</a>, a
   *  <a href="tables.html#66">reversible container</a>, and an
   *  <a href="tables.html#69">associative container</a> (using equivalent
   *  keys).  For a @c multimap<Key,T> the key_type is Key, the mapped_type
   *  is T, and the value_type is std::pair<const Key,T>.
   *
   *  Multimaps support bidirectional iterators.
   *
   *  The private tree data is declared exactly the same way for map and
   *  multimap; the distinction is made entirely in how the tree functions are
   *  called (*_unique versus *_equal, same as the standard).
  */
  template <typename _Key, typename _Tp,
	    typename _Compare = std::less<_Key>,
	    typename _Alloc = std::allocator<std::pair<const _Key, _Tp> > >
    class multimap
    {
    public:
      typedef _Key                                          key_type;
      typedef _Tp                                           mapped_type;
      typedef std::pair<const _Key, _Tp>                    value_type;
      typedef _Compare                                      key_compare;
      typedef _Alloc                                        allocator_type;

    private:
      // concept requirements
      typedef typename _Alloc::value_type                   _Alloc_value_type;
      __glibcxx_class_requires(_Tp, _SGIAssignableConcept)
      __glibcxx_class_requires4(_Compare, bool, _Key, _Key,
				_BinaryFunctionConcept)
      __glibcxx_class_requires2(value_type, _Alloc_value_type, _SameTypeConcept)	

    public:
      class value_compare
      : public std::binary_function<value_type, value_type, bool>
      {
	friend class multimap<_Key, _Tp, _Compare, _Alloc>;
      protected:
	_Compare comp;

	value_compare(_Compare __c)
	: comp(__c) { }

      public:
	bool operator()(const value_type& __x, const value_type& __y) const
	{ return comp(__x.first, __y.first); }
      };

    private:
      /// This turns a red-black tree into a [multi]map.
      typedef typename _Alloc::template rebind<value_type>::other 
        _Pair_alloc_type;

      typedef _Rb_tree<key_type, value_type, _Select1st<value_type>,
		       key_compare, _Pair_alloc_type> _Rep_type;
      /// The actual tree structure.
      _Rep_type _M_t;

    public:
      // many of these are specified differently in ISO, but the following are
      // "functionally equivalent"
      typedef typename _Pair_alloc_type::pointer         pointer;
      typedef typename _Pair_alloc_type::const_pointer   const_pointer;
      typedef typename _Pair_alloc_type::reference       reference;
      typedef typename _Pair_alloc_type::const_reference const_reference;
      typedef typename _Rep_type::iterator               iterator;
      typedef typename _Rep_type::const_iterator         const_iterator;
      typedef typename _Rep_type::size_type              size_type;
      typedef typename _Rep_type::difference_type        difference_type;
      typedef typename _Rep_type::reverse_iterator       reverse_iterator;
      typedef typename _Rep_type::const_reverse_iterator const_reverse_iterator;

      // [23.3.2] construct/copy/destroy
      // (get_allocator() is also listed in this section)
      /**
       *  @brief  Default constructor creates no elements.
       */
      multimap()
      : _M_t() { }

      /**
       *  @brief  Creates a %multimap with no elements.
       *  @param  comp  A comparison object.
       *  @param  a  An allocator object.
       */
      explicit
      multimap(const _Compare& __comp,
	       const allocator_type& __a = allocator_type())
      : _M_t(__comp, __a) { }

      /**
       *  @brief  %Multimap copy constructor.
       *  @param  x  A %multimap of identical element and allocator types.
       *
       *  The newly-created %multimap uses a copy of the allocation object
       *  used by @a x.
       */
      multimap(const multimap& __x)
      : _M_t(__x._M_t) { }

#ifdef __GXX_EXPERIMENTAL_CXX0X__
      /**
       *  @brief  %Multimap move constructor.
       *  @param   x  A %multimap of identical element and allocator types.
       *
       *  The newly-created %multimap contains the exact contents of @a x.
       *  The contents of @a x are a valid, but unspecified %multimap.
       */
      multimap(multimap&& __x)
      : _M_t(std::forward<_Rep_type>(__x._M_t)) { }
#endif

      /**
       *  @brief  Builds a %multimap from a range.
       *  @param  first  An input iterator.
       *  @param  last  An input iterator.
       *
       *  Create a %multimap consisting of copies of the elements from
       *  [first,last).  This is linear in N if the range is already sorted,
       *  and NlogN otherwise (where N is distance(first,last)).
       */
      template<typename _InputIterator>
        multimap(_InputIterator __first, _InputIterator __last)
	: _M_t()
        { _M_t._M_insert_equal(__first, __last); }

      /**
       *  @brief  Builds a %multimap from a range.
       *  @param  first  An input iterator.
       *  @param  last  An input iterator.
       *  @param  comp  A comparison functor.
       *  @param  a  An allocator object.
       *
       *  Create a %multimap consisting of copies of the elements from
       *  [first,last).  This is linear in N if the range is already sorted,
       *  and NlogN otherwise (where N is distance(first,last)).
       */
      template<typename _InputIterator>
        multimap(_InputIterator __first, _InputIterator __last,
		 const _Compare& __comp,
		 const allocator_type& __a = allocator_type())
        : _M_t(__comp, __a)
        { _M_t._M_insert_equal(__first, __last); }

      // FIXME There is no dtor declared, but we should have something generated
      // by Doxygen.  I don't know what tags to add to this paragraph to make
      // that happen:
      /**
       *  The dtor only erases the elements, and note that if the elements
       *  themselves are pointers, the pointed-to memory is not touched in any
       *  way.  Managing the pointer is the user's responsibility.
       */

      /**
       *  @brief  %Multimap assignment operator.
       *  @param  x  A %multimap of identical element and allocator types.
       *
       *  All the elements of @a x are copied, but unlike the copy constructor,
       *  the allocator object is not copied.
       */
      multimap&
      operator=(const multimap& __x)
      {
	_M_t = __x._M_t;
	return *this;
      }

#ifdef __GXX_EXPERIMENTAL_CXX0X__
      /**
       *  @brief  %Multimap move assignment operator.
       *  @param  x  A %multimap of identical element and allocator types.
       *
       *  The contents of @a x are moved into this multimap (without copying).
       *  @a x is a valid, but unspecified multimap.
       */
      multimap&
      operator=(multimap&& __x)
      {
	// NB: DR 675.
	this->clear();
	this->swap(__x); 
	return *this;
      }
#endif

      /// Get a copy of the memory allocation object.
      allocator_type
      get_allocator() const
      { return _M_t.get_allocator(); }

      // iterators
      /**
       *  Returns a read/write iterator that points to the first pair in the
       *  %multimap.  Iteration is done in ascending order according to the
       *  keys.
       */
      iterator
      begin()
      { return _M_t.begin(); }

      /**
       *  Returns a read-only (constant) iterator that points to the first pair
       *  in the %multimap.  Iteration is done in ascending order according to
       *  the keys.
       */
      const_iterator
      begin() const
      { return _M_t.begin(); }

      /**
       *  Returns a read/write iterator that points one past the last pair in
       *  the %multimap.  Iteration is done in ascending order according to the
       *  keys.
       */
      iterator
      end()
      { return _M_t.end(); }

      /**
       *  Returns a read-only (constant) iterator that points one past the last
       *  pair in the %multimap.  Iteration is done in ascending order according
       *  to the keys.
       */
      const_iterator
      end() const
      { return _M_t.end(); }

      /**
       *  Returns a read/write reverse iterator that points to the last pair in
       *  the %multimap.  Iteration is done in descending order according to the
       *  keys.
       */
      reverse_iterator
      rbegin()
      { return _M_t.rbegin(); }

      /**
       *  Returns a read-only (constant) reverse iterator that points to the
       *  last pair in the %multimap.  Iteration is done in descending order
       *  according to the keys.
       */
      const_reverse_iterator
      rbegin() const
      { return _M_t.rbegin(); }

      /**
       *  Returns a read/write reverse iterator that points to one before the
       *  first pair in the %multimap.  Iteration is done in descending order
       *  according to the keys.
       */
      reverse_iterator
      rend()
      { return _M_t.rend(); }

      /**
       *  Returns a read-only (constant) reverse iterator that points to one
       *  before the first pair in the %multimap.  Iteration is done in
       *  descending order according to the keys.
       */
      const_reverse_iterator
      rend() const
      { return _M_t.re &!&"&#&$&%&&&'&(&)&*&+&,&-&.&/&nd(); }

#ifdef __GXX_EXPERIMENTAL_CXX0X__
      /**
       *  Returns a read-only (constant) iterator that points to the first pair
       *  in the %multimap.  Iteration is done in ascending order according to
       *  the keys.
       */
      const_iterator
      cbegin() const
      { return _M_t.begin(); }

      /**
       *  Returns a read-only (constant) iterator that points one past the last
       *  pair in the %multimap.  Iteration is done in ascending order according
       *  to the keys.
       */
      const_iterator
      cend() const
      { return _M_t.end(); }

      /**
       *  Returns a read-only (constant) reverse iterator that points to the
       *  last pair in the %multimap.  Iteration is done in descending order
       *  according to the keys.
       */
      const_reverse_iterator
      crbegin() const
      { return _M_t.rbegin(); }

      /**
       *  Returns a read-only (constant) reverse iterator that points to one
       *  before the first pair in the %multimap.  Iteration is done in
       *  descending order according to the keys.
       */
      const_reverse_iterator
      crend() const
      { return _M_t.rend(); }
#endif

      // capacity
      /** Returns true if the %multimap is empty.  */
      bool
      empty() const
      { return _M_t.empty(); }

      /** Returns the size of the %multimap.  */
      size_type
      size() const
      { return _M_t.size(); }

      /** Returns the maximum size of the %multimap.  */
      size_type
      max_size() const
      { return _M_t.max_size(); }

      // modifiers
      /**
       *  @brief Inserts a std::pair into the %multimap.
       *  @param  x  Pair to be inserted (see std::make_pair for easy creation
       *             of pairs).
       *  @return An iterator that points to the inserted (key,value) pair.
       *
       *  This function inserts a (key, value) pair into the %multimap.
       *  Contrary to a std::map the %multimap does not rely on unique keys and
       *  thus multiple pairs with the same key can be inserted.
       *
       *  Insertion requires logarithmic time.
       */
      iterator
      insert(const value_type& __x)
      { return _M_t._M_insert_equal(__x); }

      /**
       *  @brief Inserts a std::pair into the %multimap.
       *  @param  position  An iterator that serves as a hint as to where the
       *                    pair should be inserted.
       *  @param  x  Pair to be inserted (see std::make_pair for easy creation
       *             of pairs).
       *  @return An iterator that points to the inserted (key,value) pair.
       *
       *  This function inserts a (key, value) pair into the %multimap.
       *  Contrary to a std::map the %multimap does not rely on unique keys and
       *  thus multiple pairs with the same key can be inserted.
       *  Note that the first parameter is only a hint and can potentially
       *  improve the performance of the insertion process.  A bad hint would
       *  cause no gains in efficiency.
       *
       *  For more on "hinting," see:
       *  http://gcc.gnu.org/onlinedocs/libstdc++/manual/bk01pt07ch17.html
       *
       *  Insertion requires logarithmic time (if the hint is not taken).
       */
      iterator
      insert(iterator __position, const value_type& __x)
      { return _M_t._M_insert_equal_(__position, __x); }

      /**
       *  @brief A template function that attempts to insert a range
       *  of elements.
       *  @param  first  Iterator pointing to the start of the range to be
       *                 inserted.
       *  @param  last  Iterator pointing to the end of the range.
       *
       *  Complexity similar to that of the range constructor.
       */
      template<typename _InputIterator>
        void
        insert(_InputIterator __first, _InputIterator __last)
        { _M_t._M_insert_equal(__first, __last); }

      /**
       *  @brief Erases an element from a %multimap.
       *  @param  position  An iterator pointing to the element to be erased.
       *
       *  This function erases an element, pointed to by the given iterator,
       *  from a %multimap.  Note that this function only erases the element,
       *  and that if the element is itself a pointer, the pointed-to memory is
       *  not touched in any way.  Managing the pointer is the user's
       *  responsibility.
       */
      void
      erase(iterator __position)
      { _M_t.erase(__position); }

      /**
       *  @brief Erases elements according to the provided key.
       *  @param  x  Key of element to be erased.
       *  @return  The number of elements erased.
       *
       *  This function erases all elements located by the given key from a
       *  %multimap.
       *  Note that this function only erases the element, and that if
       *  the element is itself a pointer, the pointed-to memory is not touched
       *  in any way.  Managing the pointer is the user's responsibility.
       */
      size_type
      erase(const key_type& __x)
      { return _M_t.erase(__x); }

      /**
       *  @brief Erases a [first,last) range of elements from a %multimap.
       *  @param  first  Iterator pointing to the start of the range to be
       *                 erased.
       *  @param  last  Iterator pointing to the end of the range to be erased.
       *
       *  This function erases a sequence of elements from a %multimap.
       *  Note that this function only erases the elements, and that if
       *  the elements themselves are pointers, the pointed-to memory is not
       *  touched in any way.  Managing the pointer is the user's responsibility.
       */
      void
      erase(iterator __first, iterator __last)
      { _M_t.erase(__first, __last); }

      /**
       *  @brief  Swaps data with another %multimap.
       *  @param  x  A %multimap of the same element and allocator types.
       *
       *  This exchanges the elements between two multimaps in constant time.
       *  (It is only swapping a pointer, an integer, and an instance of
       *  the @c Compare type (which itself is often stateless and empty), so it
       *  should be quite fast.)
       *  Note that the global std::swap() function is specialized such that
       *  std::swap(m1,m2) will feed to this function.
       */
      void
#ifdef __GXX_EXPERIMENTAL_CXX0X__
      swap(multimap&& __x)
#else
      swap(multimap& __x)
#endif
      { _M_t.swap(__x._M_t); }

      /**
       *  Erases all elements in a %multimap.  Note that this function only
       *  erases the elements, and that if the elements themselves are pointers,
       *  the pointed-to memory is not touched in any way.  Managing the pointer
       *  is the user's responsibility.
       */
      void
      clear()
      { _M_t.clear(); }

      // observers
      /**
       *  Returns the key comparison object out of which the %multimap
       *  was constructed.
       */
      key_compare
      key_comp() const
      { return _M_t.key_comp(); }

      /**
       *  Returns a value comparison object, built from the key comparison
       *  object out of which the %multimap was constructed.
       */
      value_compare
      value_comp() const
      { return value_compare(_M_t.key_comp()); }

      // multimap operations
      /**
       *  @brief Tries to locate an element in a %multimap.
       *  @param  x  Key of (key, value) pair to be located.
       *  @return  Iterator pointing to sought-after element,
       *           or end() if not found.
       *
       *  This function takes a key and tries to locate the element with which
       *  the key matches.  If successful the function returns an iterator
       *  pointing to the sought after %pair.  If unsuccessful it returns the
       *  past-the-end ( @c end() ) iterator.
       */
      iterator
      find(const key_type& __x)
      { return _M_t.find(__x); }

      /**
       *  @brief Tries to locate an element in a %multimap.
       *  @param  x  Key of (key, value) pair to be located.
       *  @return  Read-only (constant) iterator pointing to sought-after
       *           element, or end() if not found.
       *
       *  This function takes a key and tries to locate the element with which
       *  the key matches.  If successful the function returns a constant
       *  iterator pointing to the sought after %pair.  If unsuccessful it
       *  returns the past-the-end ( @c end() ) iterator.
       */
      const_iterator
      find(const key_type& __x) const
      { return _M_t.find(__x); }

      /**
       *  @brief Finds the number of elements with given key.
       *  @param  x  Key of (key, value) pairs to be located.
       *  @return Number of elements with specified key.
       */
      size_type
      count(const key_type& __x) const
      { return _M_t.count(__x); }

      /**
       *  @brief Finds the beginning of a subsequence matching given key.
       *  @param  x  Key of (key, value) pair to be located.
       *  @return  Iterator pointing to first element equal to or greater
       *           than key, or end().
       *
       *  This function returns the first element of a subsequence of elements
       *  that matches the given key.  If unsuccessful it returns an iterator
       *  pointing to the first element that has a greater value than given key
       *  or end() if no such element exists.
       */
      iterator
      lower_bound(const key_type& __x)
      { return _M_t.lower_bound(__x); }

      /**
       *  @brief Finds the beginning of a subsequence matching given key.
       *  @param  x  Key of (key, value) pair to be located.
       *  @return  Read-only (constant) iterator pointing to first element
       *           equal to or greater than key, or end().
       *
       *  This function returns the first element of a subsequence of elements
       *  that matches the given key.  If unsuccessful the iterator will point
       *  to the next greatest element or, if no such greater element exists, to
       *  end().
       */
      const_iterator
      lower_bound(const key_type& __x) const
      { return _M_t.lower_bound(__x); }

      /**
       *  @brief Finds the end of a subsequence matching given key.
       *  @param  x  Key of (key, value) pair to be located.
       *  @return Iterator pointing to the first element
       *          greater than key, or end().
       */
      iterator
      upper_bound(const key_type& __x)
      { return _M_t.upper_bound(__x); }

      /**
       *  @brief Finds the end of a subsequence matching given key.
       *  @param  x  Key of (key, value) pair to be located.
       *  @return  Read-only (constant) iterator pointing to first iterator
       *           greater than key, or end().
       */
      const_iterator
      upper_bound(const key_type& __x) const
      { return _M_t.upper_bound(__x); }

      /**
       *  @brief Finds a subsequence matching given key.
       *  @param  x  Key of (key, value) pairs to be located.
       *  @return  Pair of iterators that possibly points to the subsequence
       *           matching given key.
       *
       *  This function is equivalent to
       *  @code
       *    std::make_pair(c.lower_bound(val),
       *                   c.upper_bound(val))
       *  @endcode
       *  (but is faster than making the calls separately).
       */
      std::pair<iterator, iterator>
      equal_range(const key_type& __x)
      { return _M_t.equal_range(__x); }

      /**
       *  @brief Finds a subsequence matching given key.
       *  @param  x  Key of (key, value) pairs to be located.
       *  @return  Pair of read-only (constant) iterators that possibly points
       *           to the subsequence matching given key.
       *
       *  This function is equivalent to
       *  @code
       *    std::make_pair(c.lower_bound(val),
       *                   c.upper_bound(val))
       *  @endcode
       *  (but is faster than making the calls separately).
       */
      std::pair<const_iterator, const_iterator>
      equal_range(const key_type& __x) const
      { return _M_t.equal_range(__x); }

      template<typename _K1, typename _T1, typename _C1, typename _A1>
        friend bool
        operator==(const multimap<_K1, _T1, _C1, _A1>&,
		   const multimap<_K1, _T1, _C1, _A1>&);

      template<typename _K1, typename _T1, typename _C1, typename _A1>
        friend bool
        operator<(const multimap<_K1, _T1, _C1, _A1>&,
		  const multimap<_K1, _T1, _C1, _A1>&);
  };

  /**
   *  @brief  Multimap equality comparison.
   *  @param  x  A %multimap.
   *  @param  y  A %multimap of the same type as @a x.
   *  @return  True iff the size and elements of the maps are equal.
   *
   *  This is an equivalence relation.  It is linear in the size of the
   *  multimaps.  Multimaps are considered equivalent if their sizes are equal,
   *  and if corresponding elements compare equal.
  */
  template<typename _Key, typename _Tp, typename _Compare, typename _Alloc>
    inline bool
    operator==(const multimap<_Key, _Tp, _Compare, _Alloc>& __x,
               const multimap<_Key, _Tp, _Compare, _Alloc>& __y)
    { return __x._M_t == __y._M_t; }

  /**
   *  @brief  Multimap ordering relation.
   *  @param  x  A %multimap.
   *  @param  y  A %multimap of the same type as @a x.
   *  @return  True iff @a x is lexicographically less than @a y.
   *
   *  This is a total ordering relation.  It is linear in the size of the
   *  multimaps.  The elements must be comparable with @c <.
   *
   *  See std::lexicographical_compare() for how the determination is made.
  */
  template<typename _Key, typename _Tp, typename _Compare, typename _Alloc>
    inline bool
    operator<(const multimap<_Key, _Tp, _Compare, _Alloc>& __x,
              const multimap<_Key, _Tp, _Compare, _Alloc>& __y)
    { return __x._M_t < __y._M_t; }

  /// Based on operator==
  template<typename _Key, typename _Tp, typename _Compare, typename _Alloc>
    inline bool
    operator!=(const multimap<_Key, _Tp, _Compare, _Alloc>& __x,
               const multimap<_Key, _Tp, _Compare, _Alloc>& __y)
    { return !(__x == __y); }

  /// Based on operator<
  template<typename _Key, typename _Tp, typename _Compare, typename _Alloc>
    inline bool
    operator>(const multimap<_Key, _Tp, _Compare, _Alloc>& __x,
              const multimap<_Key, _Tp, _Compare, _Alloc>& __y)
    { return __y < __x; }

  /// Based on operator<
  template<typename _Key, typename _Tp, typename _Compare, typename _Alloc>
    inline bool
    operator<=(const multimap<_Key, _Tp, _Compare, _Alloc>& __x,
               const multimap<_Key, _Tp, _Compare, _Alloc>& __y)
    { return !(__y < __x); }

  /// Based on operator<
  template<typename _Key, typename _Tp, typename _Compare, typename _Alloc>
    inline bool
    operator>=(const multimap<_Key, _Tp, _Compare, _Alloc>& __x,
               const multimap<_Key, _Tp, _Compare, _Alloc>& __y)
    { return !(__x < __y); }

  /// See std::multimap::swap().
  template<typename _Key, typename _Tp, typename _Compare, typename _Alloc>
    inline void
    swap(multimap<_Key, _Tp, _Compare, _Alloc>& __x,
         multimap<_Key, _Tp, _Compare, _Alloc>& __y)
    { __x.swap(__y); }

#ifdef __GXX_EXPERIMENTAL_CXX0X__
  template<typename _Key, typename _Tp, typename _Compare, typename _Alloc>
    inline void
    swap(multimap<_Key, _Tp, _Compare, _Alloc>&& __x,
         multimap<_Key, _Tp, _Compare, _Alloc>& __y)
    { __x.swap(__y); }

  template<typename _Key, typename _Tp, typename _Compare, typename _Alloc>
    inline void
    swap(multimap<_Key, _Tp, _Compare, _Alloc>& __x,
         multimap<_Key, _Tp, _Compare, _Alloc>&& __y)
    { __x.swap(__y); }
#endif

_GLIBCXX_END_NESTED_NAMESPACE

#endif /* _STL_MULTIMAP_H */
// -*- C++ -*-

// Copyright (C) 2004, 2005, 2006, 2007 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, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
// 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.

// (C) Copyright Jeremy Siek 2000. Permission to copy, use, modify,
// sell and distribute this software is granted provided this
// copyright notice appears in all copies. This software is provided
// "as is" without express or implied warranty, and with no claim as
// to its suitability for any purpose.
//

/** @file boost_concept_check.h
 *  This is an internal header file, included by other library headers.
 *  You should not attempt to use it directly.
 */

// GCC Note:  based on version 1.12.0 of the Boost library.

#ifndef _BOOST_CONCEPT_CHECK_H
#define _BOOST_CONCEPT_CHECK_H 1

#pragma GCC system_header

#include <cstddef>                // for ptrdiff_t, used next
#include <bits/stl_iterator_base_types.h>    // for traits and tags

_GLIBCXX_BEGIN_NAMESPACE(__gnu_cxx)

#define _IsUnused __attribute__ ((__unused__))

// When the C-C code is in use, we would like this function to do as little
// as possible at runtime, use as few resources as possible, and hopefully
// be elided out of existence... hmmm.
template <class _Concept>
inline void __function_requires()
{
  void (_Concept::*__x)() _IsUnused = &_Concept::__constraints;
}

// No definition: if this is referenced, there's a problem with
// the instantiating type not being one of the required integer types.
// Unfortunately, this results in a link-time error, not a compile-time error.
void __error_type_must_be_an_integer_type();
void __error_type_must_be_an_unsigned_integer_type();
void __error_type_must_be_a_signed_integer_type();

// ??? Should the "concept_checking*" structs begin with more than _ ?
#define _GLIBCXX_CLASS_REQUIRES(_type_var, _ns, _concept) \
  typedef void (_ns::_concept <_type_var>::* _func##_type_var##_concept)(); \
  template <_func##_type_var##_concept _Tp1> \
  struct _concept_checking##_type_var##_concept { }; \
  typedef _concept_checking##_type_var##_concept< \
    &_ns::_concept <_type_var>::__constraints> \
    _concept_checking_typedef##_type_var##_concept

#define _GLIBCXX_CLASS_REQUIRES2(_type_var1, _type_var2, _ns, _concept) \
  typedef void (_ns::_concept <_type_var1,_type_var2>::* _func##_type_var1##_type_var2##_concept)(); \
  template <_func##_type_var1##_type_var2##_concept _Tp1> \
  struct _concept_checking##_type_var1##_type_var2##_concept { }; \
  typedef _concept_checking##_type_var1##_type_var2##_concept< \
    &_ns::_concept <_type_var1,_type_var2>::__constraints> \
    _concept_checking_typedef##_type_var1##_type_var2##_concept

#define _GLIBCXX_CLASS_REQUIRES3(_type_var1, _type_var2, _type_var3, _ns, _concept) \
  typedef void (_ns::_concept <_type_var1,_type_var2,_type_var3>::* _func##_type_var1##_type_var2##_type_var3##_concept)(); \
  template <_func##_type_var1##_type_var2##_type_var3##_concept _Tp1> \
  struct _concept_checking##_type_var1##_type_var2##_type_var3##_concept { }; \
  typedef _concept_checking##_type_var1##_type_var2##_type_var3##_concept< \
    &_ns::_concept <_type_var1,_type_var2,_type_var3>::__constraints>  \
  _concept_checking_typedef##_type_var1##_type_var2##_type_var3##_concept

#define _GLIBCXX_CLASS_REQUIRES4(_type_var1, _type_var2, _type_var3, _type_var4, _ns, _concept) \
  typedef void (_ns::_concept <_type_var1,_type_var2,_type_var3,_type_var4>::* _func##_type_var1##_type_var2##_type_var3##_type_var4##_concept)(); \
  template <_func##_type_var1##_type_var2##_type_var3##_type_var4##_concept _Tp1> \
  struct _concept_checking##_type_var1##_type_var2##_type_var3##_type_var4##_concept { }; \
  typedef _concept_checking##_type_var1##_type_var2##_type_var3##_type_var4##_concept< \
  &_ns::_concept <_type_var1,_type_var2,_type_var3,_type_var4>::__constraints> \
    _concept_checking_typedef##_type_var1##_type_var2##_type_var3##_type_var4##_concept


template <class _Tp1, class _Tp2>
struct _Aux_require_same { };

template <class _Tp>
struct _Aux_require_same<_Tp,_Tp> { typedef _Tp _Type; };

  template <class _Tp1, class _Tp2>
  struct _SameTypeConcept
  {
    void __constraints() {
      typedef typename _Aux_require_same<_Tp1, _Tp2>::_Type _Required;
    }
  };

  template <class _Tp>
  struct _IntegerConcept {
    void __constraints() {
      __error_type_must_be_an_integer_type();
    }
  };
  template <> struct _IntegerConcept<short> { void __constraints() {} };
  template <> struct _IntegerConcept<unsigned short> { void __constraints(){} };
  template <> struct _IntegerConcept<int> { void __constraints() {} };
  template <> struct _IntegerConcept<unsigned int> { void __constraints() {} };
  template <> struct _IntegerConcept<long> { void __constraints() {} };
  template <> struct _IntegerConcept<unsigned long> { void __constraints() {} };
  template <> struct _IntegerConcept<long long> { void __constraints() {} };
  template <> struct _IntegerConcept<unsigned long long>
                                                { void __constraints() {} };

  template <class _Tp>
  struct _SignedIntegerConcept {
    void __constraints() {
      __error_type_must_be_a_signed_integer_type();
    }
  };
  template <> struct _SignedIntegerConcept<short> { void __constraints() {} };
  template <> struct _SignedIntegerConcept<int> { void __constraints() {} };
  template <> struct _SignedIntegerConcept<long> { void __constraints() {} };
  template <> struct _SignedIntegerConcept<long long> { void __constraints(){}};

  template <class _Tp>
  struct _UnsignedIntegerConcept {
    void __constraints() {
      __error_type_must_be_an_unsigned_integer_type();
    }
  };
  template <> struct _UnsignedIntegerConcept<unsigned short>
    { void __constraints() {} };
  template <> struct _UnsignedIntegerConcept<unsigned int>
    { void __constraints() {} };
  template <> struct _UnsignedIntegerConcept<unsigned long>
    { void __constraints() {} };
  template <> struct _UnsignedIntegerConcept<unsigned long long>
    { void __constraints() {} };

  //===========================================================================
  // Basic Concepts

  template <class _Tp>
  struct _DefaultConstructibleConcept
  {
    void __constraints() {
      _Tp __a _IsUnused;                // require default constructor
    }
  };

  template <class _Tp>
  struct _AssignableConcept
  {
    void __constraints() {
      __a = __a;                        // require assignment operator
      __const_constraints(__a);
    }
    void __const_constraints(const _Tp& __b) {
      __a = __b;                   // const required for argument to assignment
    }
    _Tp __a;
    // possibly should be "Tp* a;" and then dereference "a" in constraint
    // functions?  present way would require a default ctor, i think...
  };

  template <class _Tp>
  struct _CopyConstructibleConcept
  {
    void __constraints() {
      _Tp __a(__b);                     // require copy constructor
      _Tp* __ptr _IsUnused = &__a;      // require address of operator
      __const_constraints(__a);
    }
    void __const_constraints(const _Tp& __a) {
      _Tp __c _IsUnused(__a);           // require const copy constructor
      const _Tp* __ptr _IsUnused = &__a; // require const address of operator
    }
    _Tp __b;
  };

  // The SGI STL version of Assignable requires copy constructor and operator=
  template <class _Tp>
  struct _SGIAssignableConcept
  {
    void __constraints() {
      _Tp __b _IsUnused(__a);
      __a = __a;                        // require assignment operator
      __const_constraints(__a);
    }
    void __const_constraints(const _Tp& __b) {
      _Tp __c _IsUnused(__b);
      __a = __b;              // const required for argument to assignment
    }
    _Tp __a;
  };

  template <class _From, class _To>
  struct _ConvertibleConcept
  {
    void __constraints() {
      _To __y _IsUnused = __x;
    }
    _From __x;
  };

  // The C++ standard requirements for many concepts talk about return
  // types that must be "convertible to bool".  The problem with this
  // requirement is that it leaves the door open for evil proxies that
  // define things like operator|| with strange return types.  Two
  // possible solutions are:
  // 1) require the return type to be exactly bool
  // 2) stay with convertible to bool, and also
  //    specify stuff about all the logical operators.
  // For now we just test for convertible to bool.
  template <class _Tp>
  void __aux_require_boolean_expr(const _Tp& __t) {
    bool __x _IsUnused = __t;
  }

// FIXME
  template <class _Tp>
  struct _EqualityComparableConcept
  {
    void __constraints() {
      __aux_require_boolean_expr(__a == __b);
    }
    _Tp __a, __b;
  };

  template <class _Tp>
  struct _LessThanComparableConcept
  {
    void __constraints() {
      __aux_require_boolean_expr(__a < __b);
    }
    _Tp __a, __b;
  };

  // This is equivalent to SGI STL's LessThanComparable.
  template <class _Tp>
  struct _ComparableConcept
  {
    void __constraints() {
      __aux_require_boolean_expr(__a < __b);
      __aux_require_boolean_expr(__a > __b);
      __aux_require_boolean_expr(__a <= __b);
      __aux_require_boolean_expr(__a >= __b);
    }
    _Tp __a, __b;
  };

#define _GLIBCXX_DEFINE_BINARY_PREDICATE_OP_CONSTRAINT(_OP,_NAME) \
  template <class _First, class _Second> \
  struct _NAME { \
    void __constraints() { (void)__constraints_(); } \
    bool __constraints_() {  \
      return  __a _OP __b; \
    } \
    _First __a; \
    _Second __b; \
  }

#define _GLIBCXX_DEFINE_BINARY_OPERATOR_CONSTRAINT(_OP,_NAME) \
  template <class _Ret, class _First, class _Second> \
  struct _NAME { \
    void __constraints() { (void)__constraints_(); } \
    _Ret __constraints_() {  \
      return __a _OP __b; \
    } \
    _First __a; \
    _Second __b; \
  }

  _GLIBCXX_DEFINE_BINARY_PREDICATE_OP_CONSTRAINT(==, _EqualOpConcept);
  _GLIBCXX_DEFINE_BINARY_PREDICATE_OP_CONSTRAINT(!=, _NotEqualOpConcept);
  _GLIBCXX_DEFINE_BINARY_PREDICATE_OP_CONSTRAINT(<, _LessThanOpConcept);
  _GLIBCXX_DEFINE_BINARY_PREDICATE_OP_CONSTRAINT(<=, _LessEqualOpConcept);
  _GLIBCXX_DEFINE_BINARY_PREDICATE_OP_CONSTRAINT(>, _GreaterThanOpConcept);
  _GLIBCXX_DEFINE_BINARY_PREDICATE_OP_CONSTRAINT(>=, _GreaterEqualOpConcept);

  _GLIBCXX_DEFINE_BINARY_OPERATOR_CONSTRAINT(+, _PlusOpConcept);
  _GLIBCXX_DEFINE_BINARY_OPERATOR_CONSTRAINT(*, _TimesOpConcept);
  _GLIBCXX_DEFINE_BINARY_OPERATOR_CONSTRAINT(/, _DivideOpConcept);
  _GLIBCXX_DEFINE_BINARY_OPERATOR_CONSTRAINT(-, _SubtractOpConcept);
  _GLIBCXX_DEFINE_BINARY_OPERATOR_CONSTRAINT(%, _ModOpConcept);

#undef _GLIBCXX_DEFINE_BINARY_PREDICATE_OP_CONSTRAINT
#undef _GLIBCXX_DEFINE_BINARY_OPERATOR_CONSTRAINT

  //===========================================================================
  // Function Object Concepts

  template <class _Func, class _Return>
  struct _GeneratorConcept
  {
    void __constraints() {
      const _Return& __r _IsUnused = __f();// require operator() member function
    }
    _Func __f;
  };


 =&>&?&@&A&B&C&D&E&F&G&H&I&J&K& template <class _Func>
  struct _GeneratorConcept<_Func,void>
  {
    void __constraints() {
      __f();                            // require operator() member function
    }
    _Func __f;
  };

  template <class _Func, class _Return, class _Arg>
  struct _UnaryFunctionConcept
  {
    void __constraints() {
      __r = __f(__arg);                  // require operator()
    }
    _Func __f;
    _Arg __arg;
    _Return __r;
  };

  template <class _Func, class _Arg>
  struct _UnaryFunctionConcept<_Func, void, _Arg> {
    void __constraints() {
      __f(__arg);                       // require operator()
    }
    _Func __f;
    _Arg __arg;
  };

  template <class _Func, class _Return, class _First, class _Second>
  struct _BinaryFunctionConcept
  {
    void __constraints() {
      __r = __f(__first, __second);     // require operator()
    }
    _Func __f;
    _First __first;
    _Second __second;
    _Return __r;
  };

  template <class _Func, class _First, class _Second>
  struct _BinaryFunctionConcept<_Func, void, _First, _Second>
  {
    void __constraints() {
      __f(__first, __second);           // require operator()
    }
    _Func __f;
    _First __first;
    _Second __second;
  };

  template <class _Func, class _Arg>
  struct _UnaryPredicateConcept
  {
    void __constraints() {
      __aux_require_boolean_expr(__f(__arg)); // require op() returning bool
    }
    _Func __f;
    _Arg __arg;
  };

  template <class _Func, class _First, class _Second>
  struct _BinaryPredicateConcept
  {
    void __constraints() {
      __aux_require_boolean_expr(__f(__a, __b)); // require op() returning bool
    }
    _Func __f;
    _First __a;
    _Second __b;
  };

  // use this when functor is used inside a container class like std::set
  template <class _Func, class _First, class _Second>
  struct _Const_BinaryPredicateConcept {
    void __constraints() {
      __const_constraints(__f);
    }
    void __const_constraints(const _Func& __fun) {
      __function_requires<_BinaryPredicateConcept<_Func, _First, _Second> >();
      // operator() must be a const member function
      __aux_require_boolean_expr(__fun(__a, __b));
    }
    _Func __f;
    _First __a;
    _Second __b;
  };

  //===========================================================================
  // Iterator Concepts

  template <class _Tp>
  struct _TrivialIteratorConcept
  {
    void __constraints() {
//    __function_requires< _DefaultConstructibleConcept<_Tp> >();
      __function_requires< _AssignableConcept<_Tp> >();
      __function_requires< _EqualityComparableConcept<_Tp> >();
//      typedef typename std::iterator_traits<_Tp>::value_type _V;
      (void)*__i;                       // require dereference operator
    }
    _Tp __i;
  };

  template <class _Tp>
  struct _Mutable_TrivialIteratorConcept
  {
    void __constraints() {
      __function_requires< _TrivialIteratorConcept<_Tp> >();
      *__i = *__j;                      // require dereference and assignment
    }
    _Tp __i, __j;
  };

  template <class _Tp>
  struct _InputIteratorC