epoc32/include/stdapis/boost/random/detail/ptr_helper.hpp
author William Roberts <williamr@symbian.org>
Wed, 31 Mar 2010 12:27:01 +0100
branchSymbian2
changeset 3 e1b950c65cb4
permissions -rw-r--r--
Attempt to represent the S^2->S^3 header reorganisation as a series of "hg rename" operations
williamr@2
     1
/* boost random/detail/ptr_helper.hpp header file
williamr@2
     2
 *
williamr@2
     3
 * Copyright Jens Maurer 2002
williamr@2
     4
 * Distributed under the Boost Software License, Version 1.0. (See
williamr@2
     5
 * accompanying file LICENSE_1_0.txt or copy at
williamr@2
     6
 * http://www.boost.org/LICENSE_1_0.txt)
williamr@2
     7
 *
williamr@2
     8
 * See http://www.boost.org for most recent version including documentation.
williamr@2
     9
 *
williamr@2
    10
 * $Id: ptr_helper.hpp,v 1.3 2004/07/27 03:43:32 dgregor Exp $
williamr@2
    11
 *
williamr@2
    12
 */
williamr@2
    13
williamr@2
    14
#ifndef BOOST_RANDOM_DETAIL_PTR_HELPER_HPP
williamr@2
    15
#define BOOST_RANDOM_DETAIL_PTR_HELPER_HPP
williamr@2
    16
williamr@2
    17
#include <boost/config.hpp>
williamr@2
    18
williamr@2
    19
williamr@2
    20
namespace boost {
williamr@2
    21
namespace random {
williamr@2
    22
namespace detail {
williamr@2
    23
williamr@2
    24
// type_traits could help here, but I don't want to depend on type_traits.
williamr@2
    25
template<class T>
williamr@2
    26
struct ptr_helper
williamr@2
    27
{
williamr@2
    28
  typedef T value_type;
williamr@2
    29
  typedef T& reference_type;
williamr@2
    30
  typedef const T& rvalue_type;
williamr@2
    31
  static reference_type ref(T& r) { return r; }
williamr@2
    32
  static const T& ref(const T& r) { return r; }
williamr@2
    33
};
williamr@2
    34
williamr@2
    35
#ifndef BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
williamr@2
    36
template<class T>
williamr@2
    37
struct ptr_helper<T&>
williamr@2
    38
{
williamr@2
    39
  typedef T value_type;
williamr@2
    40
  typedef T& reference_type;
williamr@2
    41
  typedef T& rvalue_type;
williamr@2
    42
  static reference_type ref(T& r) { return r; }
williamr@2
    43
  static const T& ref(const T& r) { return r; }
williamr@2
    44
};
williamr@2
    45
williamr@2
    46
template<class T>
williamr@2
    47
struct ptr_helper<T*>
williamr@2
    48
{
williamr@2
    49
  typedef T value_type;
williamr@2
    50
  typedef T& reference_type;
williamr@2
    51
  typedef T* rvalue_type;
williamr@2
    52
  static reference_type ref(T * p) { return *p; }
williamr@2
    53
  static const T& ref(const T * p) { return *p; }
williamr@2
    54
};
williamr@2
    55
#endif
williamr@2
    56
williamr@2
    57
} // namespace detail
williamr@2
    58
} // namespace random
williamr@2
    59
} // namespace boost
williamr@2
    60
williamr@2
    61
//
williamr@2
    62
// BOOST_RANDOM_PTR_HELPER_SPEC --
williamr@2
    63
//
williamr@2
    64
//  Helper macro for broken compilers defines specializations of
williamr@2
    65
//  ptr_helper.
williamr@2
    66
//
williamr@2
    67
#ifdef BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
williamr@2
    68
# define BOOST_RANDOM_PTR_HELPER_SPEC(T)                \
williamr@2
    69
namespace boost { namespace random { namespace detail { \
williamr@2
    70
template<>                                              \
williamr@2
    71
struct ptr_helper<T&>                                   \
williamr@2
    72
{                                                       \
williamr@2
    73
  typedef T value_type;                                 \
williamr@2
    74
  typedef T& reference_type;                            \
williamr@2
    75
  typedef T& rvalue_type;                               \
williamr@2
    76
  static reference_type ref(T& r) { return r; }         \
williamr@2
    77
  static const T& ref(const T& r) { return r; }         \
williamr@2
    78
};                                                      \
williamr@2
    79
                                                        \
williamr@2
    80
template<>                                              \
williamr@2
    81
struct ptr_helper<T*>                                   \
williamr@2
    82
{                                                       \
williamr@2
    83
  typedef T value_type;                                 \
williamr@2
    84
  typedef T& reference_type;                            \
williamr@2
    85
  typedef T* rvalue_type;                               \
williamr@2
    86
  static reference_type ref(T * p) { return *p; }       \
williamr@2
    87
  static const T& ref(const T * p) { return *p; }       \
williamr@2
    88
};                                                      \
williamr@2
    89
}}}
williamr@2
    90
#else
williamr@2
    91
# define BOOST_RANDOM_PTR_HELPER_SPEC(T)
williamr@2
    92
#endif 
williamr@2
    93
williamr@2
    94
#endif // BOOST_RANDOM_DETAIL_PTR_HELPER_HPP