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// -*- C++ -*-
// Copyright (C) 2005, 2006 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.
// Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL.
// Permission to use, copy, modify, sell, and distribute this software
// is hereby granted without fee, provided that the above copyright
// notice appears in all copies, and that both that copyright notice
// and this permission notice appear in supporting documentation. None
// of the above authors, nor IBM Haifa Research Laboratories, make any
// representation about the suitability of this software for any
// purpose. It is provided "as is" without express or implied
// warranty.
/**
* @file type_utils.hpp
* Contains utilities for handnling types. All of these classes are based on
* "Modern C++" by Andrei Alxandrescu.
*/
#ifndef PB_DS_TYPE_UTILS_HPP
#define PB_DS_TYPE_UTILS_HPP
#include <cstddef>
#include <utility>
#include <tr1/type_traits>
namespace pb_ds
{
namespace detail
{
using std::tr1::is_same;
using std::tr1::is_const;
using std::tr1::is_pointer;
using std::tr1::is_reference;
using std::tr1::is_fundamental;
using std::tr1::is_member_object_pointer;
using std::tr1::is_member_pointer;
using std::tr1::is_base_of;
using std::tr1::remove_const;
using std::tr1::remove_reference;
// Need integral_const<bool, true> <-> integral_const<int, 1>, so
// because of this use the following typedefs instead of importing
// std::tr1's.
using std::tr1::integral_constant;
typedef std::tr1::integral_constant<int, 1> true_type;
typedef std::tr1::integral_constant<int, 0> false_type;
template<typename T>
struct is_const_pointer
{
enum
{
value = is_const<T>::value && is_pointer<T>::value
};
};
template<typename T>
struct is_const_reference
{
enum
{
value = is_const<T>::value && is_reference<T>::value
};
};
template<typename T>
struct is_simple
{
enum
{
value = is_fundamental<typename remove_const<T>::type>::value
|| is_pointer<typename remove_const<T>::type>::value
|| is_member_pointer<T>::value
};
};
template<typename T>
class is_pair
{
private:
template<typename U>
struct is_pair_imp
{
enum
{
value = 0
};
};
template<typename U, typename V>
struct is_pair_imp<std::pair<U,V> >
{
enum
{
value = 1
};
};
public:
enum
{
value = is_pair_imp<T>::value
};
};
template<bool>
struct static_assert;
template<>
struct static_assert<true>
{ };
template<int>
struct static_assert_dumclass
{
enum
{
v = 1
};
};
template<typename Type>
struct type_to_type
{
typedef Type type;
};
template<bool Cond, class A, class B>
struct conditional_type;
template<typename A, class B>
struct conditional_type<true, A, B>
{
typedef A type;
};
template<typename A, class B>
struct conditional_type<false, A, B>
{
typedef B type;
};
#define __glibcxx_signed(T) ((T)(-1) < 0)
#define __glibcxx_min(T) \
(__glibcxx_signed (T) ? (T)1 << __glibcxx_digits (T) : (T)0)
#define __glibcxx_max(T) \
(__glibcxx_signed (T) ? ((T)1 << __glibcxx_digits (T)) - 1 : ~(T)0)
#define __glibcxx_digits(T) \
(sizeof(T) * __CHAR_BIT__ - __glibcxx_signed (T))
template<typename Value>
struct numeric_traits
{
typedef Value value_type;
static const value_type min = __glibcxx_min(value_type);
static const value_type max = __glibcxx_max(value_type);
};
template<typename Value>
const Value numeric_traits<Value>::min;
template<typename Value>
const Value numeric_traits<Value>::max;
} // namespace detail
} // namespace pb_ds
#endif
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