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// class template tuple -*- C++ -*-
// Copyright (C) 2004, 2005 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.
/** @file tr1/tuple
* This is a TR1 C++ Library header.
*/
// Chris Jefferson <chris@bubblescope.net>
#ifndef _TR1_TUPLE
#define _TR1_TUPLE 1
#include <tr1/utility>
#include <tr1/ref_fwd.h>
namespace std
{
_GLIBCXX_BEGIN_NAMESPACE(tr1)
// An implementation specific class which is used in the tuple class
// when the tuple is not maximum possible size.
struct _NullClass { };
/// Gives the type of the ith element of a given tuple type.
template<int __i, typename _Tp>
struct tuple_element;
/// Finds the size of a given tuple type.
template<typename _Tp>
struct tuple_size;
// 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; };
// Class used in the implementation of get
template<int __i, typename _Tp>
struct __get_helper;
// Returns a const reference to the ith element of a tuple.
// Any const or non-const ref elements are returned with their original type.
// 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;
// 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;
};
#include "tuple_defs.h"
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; }
};
// A class (and instance) which can be used in 'tie' when an element
// of a tuple is not required
struct swallow_assign
{
template<class T>
swallow_assign&
operator=(const T&)
{ return *this; }
};
// TODO: Put this in some kind of shared file.
namespace
{
swallow_assign ignore;
}; // anonymous namespace
_GLIBCXX_END_NAMESPACE
}
#define _GLIBCXX_CAT(x,y) _GLIBCXX_CAT2(x,y)
#define _GLIBCXX_CAT2(x,y) x##y
#define _SHORT_REPEAT
#define _GLIBCXX_REPEAT_HEADER <tr1/tuple_iterate.h>
#include <tr1/repeat.h>
#undef _GLIBCXX_REPEAT_HEADER
#undef _SHORT_REPEAT
#include <tr1/functional>
#endif
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