ceph/src/boost/libs/multiprecision/include/boost/multiprecision/detail/ublas_interop.hpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 //  Copyright 2013 John Maddock. Distributed under the Boost
   3 //  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_MP_UBLAS_HPP
   7 #define BOOST_MP_UBLAS_HPP
   8
   9 namespace boost { namespace numeric { namespace ublas {
  10
  11 template<class V>
  12 class sparse_vector_element;
  13
  14 template <class V, class Backend, multiprecision::expression_template_option ExpressionTemplates>
  15 inline bool operator == (const sparse_vector_element<V>& a, const ::boost::multiprecision::number<Backend, ExpressionTemplates>& b)
  16 {
  17    typedef typename sparse_vector_element<V>::const_reference ref_type;
  18    return static_cast<ref_type>(a) == b;
  19 }
  20
  21 template<class X, class Y>
  22 struct promote_traits;
  23
  24 template <class Backend1, boost::multiprecision::expression_template_option ExpressionTemplates1, class Backend2, boost::multiprecision::expression_template_option ExpressionTemplates2>
  25 struct promote_traits<boost::multiprecision::number<Backend1, ExpressionTemplates1>, boost::multiprecision::number<Backend2, ExpressionTemplates2> >
  26 {
  27    typedef boost::multiprecision::number<Backend1, ExpressionTemplates1> number1_t;
  28    typedef boost::multiprecision::number<Backend2, ExpressionTemplates2> number2_t;
  29    typedef typename mpl::if_c<
  30       is_convertible<number1_t, number2_t>::value && !is_convertible<number2_t, number1_t>::value,
  31       number2_t, number1_t
  32    >::type promote_type;
  33 };
  34
  35 template <class Backend1, boost::multiprecision::expression_template_option ExpressionTemplates1, class Arithmetic>
  36 struct promote_traits<boost::multiprecision::number<Backend1, ExpressionTemplates1>, Arithmetic>
  37 {
  38    typedef boost::multiprecision::number<Backend1, ExpressionTemplates1> promote_type;
  39 };
  40
  41 template <class Arithmetic, class Backend1, boost::multiprecision::expression_template_option ExpressionTemplates1>
  42 struct promote_traits<Arithmetic, boost::multiprecision::number<Backend1, ExpressionTemplates1> >
  43 {
  44    typedef boost::multiprecision::number<Backend1, ExpressionTemplates1> promote_type;
  45 };
  46
  47 template <class Backend1, boost::multiprecision::expression_template_option ExpressionTemplates1, class tag, class Arg1, class Arg2, class Arg3, class Arg4>
  48 struct promote_traits<boost::multiprecision::number<Backend1, ExpressionTemplates1>, boost::multiprecision::detail::expression<tag, Arg1, Arg2, Arg3, Arg4> >
  49 {
  50    typedef boost::multiprecision::number<Backend1, ExpressionTemplates1> number1_t;
  51    typedef boost::multiprecision::detail::expression<tag, Arg1, Arg2, Arg3, Arg4> expression_type;
  52    typedef typename expression_type::result_type number2_t;
  53    typedef typename promote_traits<number1_t, number2_t>::promote_type promote_type;
  54 };
  55
  56 template <class tag, class Arg1, class Arg2, class Arg3, class Arg4, class Backend1, boost::multiprecision::expression_template_option ExpressionTemplates1>
  57 struct promote_traits<boost::multiprecision::detail::expression<tag, Arg1, Arg2, Arg3, Arg4>, boost::multiprecision::number<Backend1, ExpressionTemplates1> >
  58 {
  59    typedef boost::multiprecision::number<Backend1, ExpressionTemplates1> number1_t;
  60    typedef boost::multiprecision::detail::expression<tag, Arg1, Arg2, Arg3, Arg4> expression_type;
  61    typedef typename expression_type::result_type number2_t;
  62    typedef typename promote_traits<number1_t, number2_t>::promote_type promote_type;
  63 };
  64
  65 template <class tag, class Arg1, class Arg2, class Arg3, class Arg4, class tagb, class Arg1b, class Arg2b, class Arg3b, class Arg4b>
  66 struct promote_traits<boost::multiprecision::detail::expression<tag, Arg1, Arg2, Arg3, Arg4>, boost::multiprecision::detail::expression<tagb, Arg1b, Arg2b, Arg3b, Arg4b> >
  67 {
  68    typedef boost::multiprecision::detail::expression<tag, Arg1, Arg2, Arg3, Arg4> expression1_t;
  69    typedef typename expression1_t::result_type number1_t;
  70    typedef boost::multiprecision::detail::expression<tagb, Arg1b, Arg2b, Arg3b, Arg4b> expression2_t;
  71    typedef typename expression2_t::result_type number2_t;
  72 };
  73
  74 }}} // namespace
  75
  76 #endif
  77