boost/tr1/array.hpp

   1 //  (C) Copyright John Maddock 2005.
   2 //  Use, modification and distribution are subject to the
   3 //  Boost Software License, Version 1.0. (See accompanying file
   4 //  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
   5
   6 #ifndef BOOST_TR1_ARRAY_HPP_INCLUDED
   7 #  define BOOST_TR1_ARRAY_HPP_INCLUDED
   8 #  include <boost/tr1/detail/config.hpp>
   9
  10 #ifdef BOOST_HAS_TR1_ARRAY
  11
  12 #  ifdef BOOST_HAS_INCLUDE_NEXT
  13 #     include_next BOOST_TR1_HEADER(array)
  14 #  else
  15 #     include <boost/tr1/detail/config_all.hpp>
  16 #     include BOOST_TR1_STD_HEADER(BOOST_TR1_PATH(array))
  17 #  endif
  18
  19 #else
  20
  21 #include <boost/array.hpp>
  22 #include <boost/static_assert.hpp>
  23 #include <boost/type_traits/integral_constant.hpp>
  24 #include <boost/detail/workaround.hpp>
  25
  26 namespace std{ namespace tr1{
  27
  28 using ::boost::array;
  29
  30 #if !BOOST_WORKAROUND(__BORLANDC__, < 0x0582)
  31 // [6.1.3.2] Tuple creation functions
  32 using ::boost::swap;
  33 #endif
  34
  35 #if !defined(BOOST_TR1_USE_OLD_TUPLE)
  36 }} namespace boost{ namespace fusion{
  37 #endif
  38
  39 // [6.2.2.5] Tuple interface to class template array
  40 template <class T> struct tuple_size; // forward declaration
  41 template <int I, class T> struct tuple_element; // forward declaration
  42 #ifndef BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
  43 template <class T, size_t N>
  44 struct tuple_size< ::boost::array<T, N> >
  45    : public ::boost::integral_constant< ::std::size_t, N>{};
  46
  47
  48 template <int I, class T, size_t N>
  49 struct tuple_element<I, ::boost::array<T, N> >
  50 {
  51 #if !BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x570))
  52    BOOST_STATIC_ASSERT(I < (int)N);
  53    BOOST_STATIC_ASSERT(I >= 0);
  54 #endif
  55    typedef T type;
  56 };
  57 #endif
  58 template <int I, class T, size_t N>
  59 T& get( ::boost::array<T, N>& a)
  60 {
  61    BOOST_STATIC_ASSERT(I < N);
  62    BOOST_STATIC_ASSERT(I >= 0);
  63    return a[I];
  64 }
  65
  66 template <int I, class T, size_t N>
  67 const T& get(const array<T, N>& a)
  68 {
  69    BOOST_STATIC_ASSERT(I < N);
  70    BOOST_STATIC_ASSERT(I >= 0);
  71    return a[I];
  72 }
  73
  74 #if !defined(BOOST_TR1_USE_OLD_TUPLE)
  75 }} namespace std{ namespace tr1{
  76
  77    using ::boost::fusion::tuple_size;
  78    using ::boost::fusion::tuple_element;
  79    using ::boost::fusion::get;
  80
  81 #endif
  82
  83
  84 } } // namespaces
  85
  86 #endif
  87
  88 #endif