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File Content: `tuple`

// class template tuple -*- C++ -*-

// Copyright (C) 2004-2013 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/>.

/** @file tr1/tuple
*  This is a TR1 C++ Library header.
*/

// Chris Jefferson <chris@bubblescope.net>
// Variadic Templates support by Douglas Gregor <doug.gregor@gmail.com>

#ifndef _GLIBCXX_TR1_TUPLE
#define _GLIBCXX_TR1_TUPLE 1

#pragma GCC system_header

#include <utility>

namespace std _GLIBCXX_VISIBILITY(default)
{
namespace tr1
{
_GLIBCXX_BEGIN_NAMESPACE_VERSION

  // Adds a const reference to a non-reference type.
  template<typename _Tp>
    struct __add_c_ref
    { typedef const _Tp& type; };

  template<typename _Tp>
    struct __add_c_ref<_Tp&>
    { typedef _Tp& type; };

  // Adds a reference to a non-reference type.
  template<typename _Tp>
    struct __add_ref
    { typedef _Tp& type; };

  template<typename _Tp>
    struct __add_ref<_Tp&>
    { typedef _Tp& type; };

  /**
   * Contains the actual implementation of the @c tuple template, stored
   * as a recursive inheritance hierarchy from the first element (most
   * derived class) to the last (least derived class). The @c Idx
   * parameter gives the 0-based index of the element stored at this
   * point in the hierarchy; we use it to implement a constant-time
   * get() operation.
   */
  template<int _Idx, typename... _Elements>
    struct _Tuple_impl; 

  /**
   * Zero-element tuple implementation. This is the basis case for the 
   * inheritance recursion.
   */
  template<int _Idx>
    struct _Tuple_impl<_Idx> { };

  /**
   * Recursive tuple implementation. Here we store the @c Head element
   * and derive from a @c Tuple_impl containing the remaining elements
   * (which contains the @c Tail).
   */
  template<int _Idx, typename _Head, typename... _Tail>
    struct _Tuple_impl<_Idx, _Head, _Tail...>
    : public _Tuple_impl<_Idx + 1, _Tail...>
    {
      typedef _Tuple_impl<_Idx + 1, _Tail...> _Inherited;
      
      _Head _M_head;
      
      _Inherited&       _M_tail()       { return *this; }
      const _Inherited& _M_tail() const { return *this; }
      
      _Tuple_impl() : _Inherited(), _M_head() { }
      
      explicit 
      _Tuple_impl(typename __add_c_ref<_Head>::type __head,
		  typename __add_c_ref<_Tail>::type... __tail)
      : _Inherited(__tail...), _M_head(__head) { }

      template<typename... _UElements>
      _Tuple_impl(const _Tuple_impl<_Idx, _UElements...>& __in)
      : _Inherited(__in._M_tail()), _M_head(__in._M_head) { }

      _Tuple_impl(const _Tuple_impl& __in)
      : _Inherited(__in._M_tail()), _M_head(__in._M_head) { }
     
      template<typename... _UElements>
        _Tuple_impl&
        operator=(const _Tuple_impl<_Idx, _UElements...>& __in)
        {
	  _M_head = __in._M_head;
	  _M_tail() = __in._M_tail();
	  return *this;
	}

      _Tuple_impl&
      operator=(const _Tuple_impl& __in)
      {
	_M_head = __in._M_head;
	_M_tail() = __in._M_tail();
	return *this;
      }
    };

  template<typename... _Elements> 
    class tuple : public _Tuple_impl<0, _Elements...>
    {
      typedef _Tuple_impl<0, _Elements...> _Inherited;

    public:
      tuple() : _Inherited() { }

      explicit
      tuple(typename __add_c_ref<_Elements>::type... __elements)
      : _Inherited(__elements...) { }

      template<typename... _UElements>
        tuple(const tuple<_UElements...>& __in)
	: _Inherited(__in) { }

      tuple(const tuple& __in)
      : _Inherited(__in) { }

      template<typename... _UElements>
        tuple&
        operator=(const tuple<_UElements...>& __in)
        {
	  static_cast<_Inherited&>(*this) = __in;
	  return *this;
	}

      tuple&
      operator=(const tuple& __in)
      {
	static_cast<_Inherited&>(*this) = __in;
	return *this;
      }
    };

  template<> class tuple<> { };

  // 2-element tuple, with construction and assignment from a pair.
  template<typename _T1, typename _T2>
    class tuple<_T1, _T2> : public _Tuple_impl<0, _T1, _T2>
    {
      typedef _Tuple_impl<0, _T1, _T2> _Inherited;

    public:
      tuple() : _Inherited() { }

      explicit
      tuple(typename __add_c_ref<_T1>::type __a1,
	    typename __add_c_ref<_T2>::type __a2)
      : _Inherited(__a1, __a2) { }

      template<typename _U1, typename _U2>
        tuple(const tuple<_U1, _U2>& __in)
	: _Inherited(__in) { }

      tuple(const tuple& __in)
      : _Inherited(__in) { }

      template<typename _U1, typename _U2>
        tuple(const pair<_U1, _U2>& __in)
	: _Inherited(_Tuple_impl<0, 
		     typename __add_c_ref<_U1>::type,
		     typename __add_c_ref<_U2>::type>(__in.first, 
						      __in.second))
        { }
  
      template<typename _U1, typename _U2>
        tuple&
        operator=(const tuple<_U1, _U2>& __in)
        {
	  static_cast<_Inherited&>(*this) = __in;
	  return *this;
	}

      tuple&
      operator=(const tuple& __in)
      {
	static_cast<_Inherited&>(*this) = __in;
	return *this;
      }

      template<typename _U1, typename _U2>
        tuple&
        operator=(const pair<_U1, _U2>& __in)
        {
	  this->_M_head = __in.first;
	  this->_M_tail()._M_head = __in.second;
	  return *this;
	}
    };

  
  /// Gives the type of the ith element of a given tuple type.
  template<int __i, typename _Tp>
    struct tuple_element;

  /**
   * Recursive case for tuple_element: strip off the first element in
   * the tuple and retrieve the (i-1)th element of the remaining tuple.
   */
  template<int __i, typename _Head, typename... _Tail>
    struct tuple_element<__i, tuple<_Head, _Tail...> >
    : tuple_element<__i - 1, tuple<_Tail...> > { };

  /**
   * Basis case for tuple_element: The first element is the one we're seeking.
   */
  template<typename _Head, typename... _Tail>
    struct tuple_element<0, tuple<_Head, _Tail...> >
    {
      typedef _Head type;
    };

  /// Finds the size of a given tuple type.
  template<typename _Tp>
    struct tuple_size;

  /// class tuple_size
  template<typename... _Elements>
    struct tuple_size<tuple<_Elements...> >
    {
      static const int value = sizeof...(_Elements);
    };

  template<typename... _Elements>
    const int tuple_size<tuple<_Elements...> >::value;

  template<int __i, typename _Head, typename... _Tail>
    inline typename __add_ref<_Head>::type
    __get_helper(_Tuple_impl<__i, _Head, _Tail...>& __t)
    {
      return __t._M_head;
    }

  template<int __i, typename _Head, typename... _Tail>
    inline typename __add_c_ref<_Head>::type
    __get_helper(const _Tuple_impl<__i, _Head, _Tail...>& __t)
    {
      return __t._M_head;
    }

  // Return a reference (const reference) to the ith element of a tuple.
  // Any const or non-const ref elements are returned with their original type.
  template<int __i, typename... _Elements>
    inline typename __add_ref<
                      typename tuple_element<__i, tuple<_Elements...> >::type
                    >::type
    get(tuple<_Elements...>& __t)
    { 
      return __get_helper<__i>(__t); 
    }

  template<int __i, typename... _Elements>
    inline typename __add_c_ref<
                      typename tuple_element<__i, tuple<_Elements...> >::type
                    >::type
    get(const tuple<_Elements...>& __t)
    {
      return __get_helper<__i>(__t);
    }

  // This class helps construct the various comparison operations on tuples
  template<int __check_equal_size, int __i, int __j,
	   typename _Tp, typename _Up>
    struct __tuple_compare;

  template<int __i, int __j, typename _Tp, typename _Up>
    struct __tuple_compare<0, __i, __j, _Tp, _Up>
    {
      static bool __eq(const _Tp& __t, const _Up& __u)
      {
	return (get<__i>(__t) == get<__i>(__u) &&
		__tuple_compare<0, __i+1, __j, _Tp, _Up>::__eq(__t, __u));
      }
     
      static bool __less(const _Tp& __t, const _Up& __u)
      {
	return ((get<__i>(__t) < get<__i>(__u))
		|| !(get<__i>(__u) < get<__i>(__t)) &&
		__tuple_compare<0, __i+1, __j, _Tp, _Up>::__less(__t, __u));
      }
    };

  template<int __i, typename _Tp, typename _Up>
    struct __tuple_compare<0, __i, __i, _Tp, _Up>
    {
      static bool __eq(const _Tp&, const _Up&)
      { return true; }
     
      static bool __less(const _Tp&, const _Up&)
      { return false; }
    };

  template<typename... _TElements, typename... _UElements>
    bool
    operator==(const tuple<_TElements...>& __t,
	       const tuple<_UElements...>& __u)
    {
      typedef tuple<_TElements...> _Tp;
      typedef tuple<_UElements...> _Up;
      return (__tuple_compare<tuple_size<_Tp>::value - tuple_size<_Up>::value,
	      0, tuple_size<_Tp>::value, _Tp, _Up>::__eq(__t, __u));
    }

  template<typename... _TElements, typename... _UElements>
    bool
    operator<(const tuple<_TElements...>& __t,
	      const tuple<_UElements...>& __u)
    {
      typedef tuple<_TElements...> _Tp;
      typedef tuple<_UElements...> _Up;
      return (__tuple_compare<tuple_size<_Tp>::value - tuple_size<_Up>::value,
	      0, tuple_size<_Tp>::value, _Tp, _Up>::__less(__t, __u));
    }

  template<typename... _TElements, typename... _UElements>
    inline bool
    operator!=(const tuple<_TElements...>& __t,
	       const tuple<_UElements...>& __u)
    { return !(__t == __u); }

  template<typename... _TElements, typename... _UElements>
    inline bool
    operator>(const tuple<_TElements...>& __t,
	      const tuple<_UElements...>& __u)
    { return __u < __t; }

  template<typename... _TElements, typename... _UElements>
    inline bool
    operator<=(const tuple<_TElements...>& __t,
	       const tuple<_UElements...>& __u)
    { return !(__u < __t); }

  template<typename... _TElements, typename... _UElements>
    inline bool
    operator>=(const tuple<_TElements...>& __t,
	       const tuple<_UElements...>& __u)
    { return !(__t < __u); }

  template<typename _Tp>
    class reference_wrapper;

  // Helper which adds a reference to a type when given a reference_wrapper
  template<typename _Tp>
    struct __strip_reference_wrapper
    {
      typedef _Tp __type;
    };

  template<typename _Tp>
    struct __strip_reference_wrapper<reference_wrapper<_Tp> >
    {
      typedef _Tp& __type;
    };

  template<typename _Tp>
    struct __strip_reference_wrapper<const reference_wrapper<_Tp> >
    {
      typedef _Tp& __type;
    };

  template<typename... _Elements>
    inline tuple<typename __strip_reference_wrapper<_Elements>::__type...>
    make_tuple(_Elements... __args)
    {
      typedef tuple<typename __strip_reference_wrapper<_Elements>::__type...>
        __result_type;
      return __result_type(__args...);
    }

  template<typename... _Elements>
    inline tuple<_Elements&...>
    tie(_Elements&... __args)
    {
      return tuple<_Elements&...>(__args...);
    }

  // A class (and instance) which can be used in 'tie' when an element
  // of a tuple is not required
  struct _Swallow_assign
  {
    template<class _Tp>
      _Swallow_assign&
      operator=(const _Tp&)
      { return *this; }
  };

  // TODO: Put this in some kind of shared file.
  namespace
  {
    _Swallow_assign ignore;
  }; // anonymous namespace

_GLIBCXX_END_NAMESPACE_VERSION
}
}

#endif // _GLIBCXX_TR1_TUPLE

Name	Size	Permission
array	6964 bytes	0644
bessel_function.tcc	22122 bytes	0644
beta_function.tcc	5605 bytes	0644
ccomplex	1255 bytes	0644
cctype	1412 bytes	0644
cfenv	2004 bytes	0644
cfloat	1380 bytes	0644
cinttypes	2256 bytes	0644
climits	1454 bytes	0644
cmath	37423 bytes	0644
complex	12327 bytes	0644
complex.h	1261 bytes	0644
cstdarg	1246 bytes	0644
cstdbool	1344 bytes	0644
cstdint	2623 bytes	0644
cstdio	1476 bytes	0644
cstdlib	1783 bytes	0644
ctgmath	1248 bytes	0644
ctime	1234 bytes	0644
ctype.h	1209 bytes	0644
cwchar	1712 bytes	0644
cwctype	1459 bytes	0644
ell_integral.tcc	27498 bytes	0644
exp_integral.tcc	15780 bytes	0644
fenv.h	1204 bytes	0644
float.h	1209 bytes	0644
functional	70814 bytes	0644
functional_hash.h	5834 bytes	0644
gamma.tcc	14310 bytes	0644
hashtable.h	41537 bytes	0644
hashtable_policy.h	25231 bytes	0644
hypergeometric.tcc	27715 bytes	0644
inttypes.h	1267 bytes	0644
legendre_function.tcc	10566 bytes	0644
limits.h	1214 bytes	0644
math.h	4553 bytes	0644
memory	1791 bytes	0644
modified_bessel_func.tcc	15716 bytes	0644
poly_hermite.tcc	3699 bytes	0644
poly_laguerre.tcc	11341 bytes	0644
random	1589 bytes	0644
random.h	73193 bytes	0644
random.tcc	53996 bytes	0644
regex	92946 bytes	0644
riemann_zeta.tcc	13664 bytes	0644
shared_ptr.h	32672 bytes	0644
special_function_util.h	4819 bytes	0644
stdarg.h	1214 bytes	0644
stdbool.h	1219 bytes	0644
stdint.h	1214 bytes	0644
stdio.h	1209 bytes	0644
stdlib.h	1480 bytes	0644
tgmath.h	1255 bytes	0644
tuple	12119 bytes	0644
type_traits	19019 bytes	0644
unordered_map	1574 bytes	0644
unordered_map.h	10216 bytes	0644
unordered_set	1574 bytes	0644
unordered_set.h	9540 bytes	0644
utility	3225 bytes	0644
wchar.h	1249 bytes	0644
wctype.h	1255 bytes	0644

File Content: tuple

File Content: `tuple`