///////////////////////////////////////////////////////////////////////////////
//  Copyright 2011 John Maddock. Distributed under the Boost
//  Software License, Version 1.0. (See accompanying file
//  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)

#ifndef BOOST_MATH_BN_MPFI_HPP
#define BOOST_MATH_BN_MPFI_HPP

#include <boost/multiprecision/number.hpp>
#include <boost/math/special_functions/fpclassify.hpp>
#include <boost/cstdint.hpp>
#include <boost/multiprecision/detail/big_lanczos.hpp>
#include <boost/multiprecision/detail/digits.hpp>
#include <boost/multiprecision/mpfr.hpp>
#include <boost/math/constants/constants.hpp>
#include <mpfi.h>
#include <cmath>
#include <algorithm>

namespace boost{
namespace multiprecision{
namespace backends{

template <unsigned digits10>
struct mpfi_float_backend;

} // namespace backends

template <unsigned digits10>
struct number_category<backends::mpfi_float_backend<digits10> > : public mpl::int_<number_kind_floating_point>{};

struct interval_error : public std::runtime_error
{
   interval_error(const std::string& s) : std::runtime_error(s) {}
};

namespace backends{

namespace detail{

inline int mpfi_sgn(mpfi_srcptr p)
{
   if(mpfi_is_zero(p))
      return 0;
   if(mpfi_is_strictly_pos(p))
      return 1;
   if(mpfi_is_strictly_neg(p))
      return -1;
   BOOST_THROW_EXCEPTION(interval_error("Sign of interval is ambiguous."));
}

template <unsigned digits10>
struct mpfi_float_imp;

template <unsigned digits10>
struct mpfi_float_imp
{
#ifdef BOOST_HAS_LONG_LONG
   typedef mpl::list<long, boost::long_long_type>                     signed_types;
   typedef mpl::list<unsigned long, boost::ulong_long_type>   unsigned_types;
#else
   typedef mpl::list<long>                                signed_types;
   typedef mpl::list<unsigned long>                       unsigned_types;
#endif
   typedef mpl::list<double, long double>                 float_types;
   typedef long                                           exponent_type;

   mpfi_float_imp()
   {
      mpfi_init2(m_data, multiprecision::detail::digits10_2_2(digits10 ? digits10 : get_default_precision()));
   }
   mpfi_float_imp(unsigned prec)
   {
      mpfi_init2(m_data, prec);
   }

   mpfi_float_imp(const mpfi_float_imp& o)
   {
      mpfi_init2(m_data, multiprecision::detail::digits10_2_2(digits10 ? digits10 : get_default_precision()));
      if(o.m_data[0].left._mpfr_d)
         mpfi_set(m_data, o.m_data);
   }
#ifndef BOOST_NO_CXX11_RVALUE_REFERENCES
   mpfi_float_imp(mpfi_float_imp&& o) BOOST_NOEXCEPT
   {
      m_data[0] = o.m_data[0];
      o.m_data[0].left._mpfr_d = 0;
   }
#endif
   mpfi_float_imp& operator = (const mpfi_float_imp& o)
   {
      if(m_data[0].left._mpfr_d == 0)
         mpfi_init2(m_data, multiprecision::detail::digits10_2_2(digits10 ? digits10 : get_default_precision()));
      if(o.m_data[0].left._mpfr_d)
         mpfi_set(m_data, o.m_data);
      return *this;
   }
#ifndef BOOST_NO_CXX11_RVALUE_REFERENCES
   mpfi_float_imp& operator = (mpfi_float_imp&& o) BOOST_NOEXCEPT
   {
      mpfi_swap(m_data, o.m_data);
      return *this;
   }
#endif
#ifdef BOOST_HAS_LONG_LONG
#ifdef _MPFR_H_HAVE_INTMAX_T
   mpfi_float_imp& operator = (boost::ulong_long_type i)
   {
      if(m_data[0].left._mpfr_d == 0)
         mpfi_init2(m_data, multiprecision::detail::digits10_2_2(digits10 ? digits10 : get_default_precision()));
      mpfr_set_uj(left_data(), i, GMP_RNDD);
      mpfr_set_uj(right_data(), i, GMP_RNDU);
      return *this;
   }
   mpfi_float_imp& operator = (boost::long_long_type i)
   {
      if(m_data[0].left._mpfr_d == 0)
         mpfi_init2(m_data, multiprecision::detail::digits10_2_2(digits10 ? digits10 : get_default_precision()));
      mpfr_set_sj(left_data(), i, GMP_RNDD);
      mpfr_set_sj(right_data(), i, GMP_RNDU);
      return *this;
   }
#else
   mpfi_float_imp& operator = (boost::ulong_long_type i)
   {
      if(m_data[0].left._mpfr_d == 0)
         mpfi_init2(m_data, multiprecision::detail::digits10_2_2(digits10 ? digits10 : get_default_precision()));
      boost::ulong_long_type mask = ((((1uLL << (std::numeric_limits<unsigned long>::digits - 1)) - 1) << 1) | 1u);
      unsigned shift = 0;
      mpfi_t t;
      mpfi_init2(t, (std::max)(static_cast<unsigned long>(std::numeric_limits<boost::ulong_long_type>::digits), static_cast<unsigned long>(multiprecision::detail::digits10_2_2(digits10))));
      mpfi_set_ui(m_data, 0);
      while(i)
      {
         mpfi_set_ui(t, static_cast<unsigned long>(i & mask));
         if(shift)
            mpfi_mul_2exp(t, t, shift);
         mpfi_add(m_data, m_data, t);
         shift += std::numeric_limits<unsigned long>::digits;
         i >>= std::numeric_limits<unsigned long>::digits;
      }
      mpfi_clear(t);
      return *this;
   }
   mpfi_float_imp& operator = (boost::long_long_type i)
   {
      if(m_data[0].left._mpfr_d == 0)
         mpfi_init2(m_data, multiprecision::detail::digits10_2_2(digits10 ? digits10 : get_default_precision()));
      bool neg = i < 0;
      *this = boost::multiprecision::detail::unsigned_abs(i);
      if(neg)
         mpfi_neg(m_data, m_data);
      return *this;
   }
#endif
#endif
   mpfi_float_imp& operator = (unsigned long i)
   {
      if(m_data[0].left._mpfr_d == 0)
         mpfi_init2(m_data, multiprecision::detail::digits10_2_2(digits10 ? digits10 : get_default_precision()));
      mpfi_set_ui(m_data, i);
      return *this;
   }
   mpfi_float_imp& operator = (long i)
   {
      if(m_data[0].left._mpfr_d == 0)
         mpfi_init2(m_data, multiprecision::detail::digits10_2_2(digits10 ? digits10 : get_default_precision()));
      mpfi_set_si(m_data, i);
      return *this;
   }
   mpfi_float_imp& operator = (double d)
   {
      if(m_data[0].left._mpfr_d == 0)
         mpfi_init2(m_data, multiprecision::detail::digits10_2_2(digits10 ? digits10 : get_default_precision()));
      mpfi_set_d(m_data, d);
      return *this;
   }
   mpfi_float_imp& operator = (long double a)
   {
      if(m_data[0].left._mpfr_d == 0)
         mpfi_init2(m_data, multiprecision::detail::digits10_2_2(digits10 ? digits10 : get_default_precision()));
      mpfr_set_ld(left_data(), a, GMP_RNDD);
      mpfr_set_ld(right_data(), a, GMP_RNDU);
      return *this;
   }
   mpfi_float_imp& operator = (const char* s)
   {
      using default_ops::eval_fpclassify;
   
      if(m_data[0].left._mpfr_d == 0)
         mpfi_init2(m_data, multiprecision::detail::digits10_2_2(digits10 ? digits10 : get_default_precision()));

      if(s && (*s == '{'))
      {
         mpfr_float_backend<digits10> a, b;
         std::string part;
         const char* p = ++s;
         while(*p && (*p != ',') && (*p != '}'))
            ++p;
         part.assign(s + 1, p);
         a = part.c_str();
         s = p;
         if(*p && (*p != '}'))
         {
            ++p;
            while(*p && (*p != ',') && (*p != '}'))
               ++p;
            part.assign(s + 1, p);
         }
         else
            part.erase();
         b = part.c_str();

         if(eval_fpclassify(a) == (int)FP_NAN)
         {
            mpfi_set_fr(this->data(), a.data());
         }
         else if(eval_fpclassify(b) == (int)FP_NAN)
         {
            mpfi_set_fr(this->data(), b.data());
         }
         else
         {
            if(a.compare(b) > 0)
            {
               BOOST_THROW_EXCEPTION(std::runtime_error("Attempt to create interval with invalid range (start is greater than end)."));
            }
            mpfi_interv_fr(m_data, a.data(), b.data());
         }
      }
      else if(mpfi_set_str(m_data, s, 10) != 0)
      {
         BOOST_THROW_EXCEPTION(std::runtime_error(std::string("Unable to parse string \"") + s + std::string("\"as a valid floating point number.")));
      }
      return *this;
   }
   void swap(mpfi_float_imp& o) BOOST_NOEXCEPT
   {
      mpfi_swap(m_data, o.m_data);
   }
   std::string str(std::streamsize digits, std::ios_base::fmtflags f)const
   {
      BOOST_ASSERT(m_data[0].left._mpfr_d);

      mpfr_float_backend<digits10> a, b;

      mpfi_get_left(a.data(), m_data);
      mpfi_get_right(b.data(), m_data);

      if(a.compare(b) == 0)
         return a.str(digits, f);

      return "{" + a.str(digits, f) + "," + b.str(digits, f) + "}";
   }
   ~mpfi_float_imp() BOOST_NOEXCEPT
   {
      if(m_data[0].left._mpfr_d)
         mpfi_clear(m_data);
   }
   void negate() BOOST_NOEXCEPT
   {
      BOOST_ASSERT(m_data[0].left._mpfr_d);
      mpfi_neg(m_data, m_data);
   }
   int compare(const mpfi_float_imp& o)const BOOST_NOEXCEPT
   {
      BOOST_ASSERT(m_data[0].left._mpfr_d && o.m_data[0].left._mpfr_d);
      if(mpfr_cmp(right_data(), o.left_data()) < 0)
         return -1;
      if(mpfr_cmp(left_data(), o.right_data()) > 0)
         return 1;
      if((mpfr_cmp(left_data(), o.left_data()) == 0) && (mpfr_cmp(right_data(), o.right_data()) == 0))
         return 0;
      BOOST_THROW_EXCEPTION(interval_error("Ambiguous comparison between two values."));
      return 0;
   }
   template <class V>
   int compare(V v)const BOOST_NOEXCEPT
   {
      mpfi_float_imp d;
      d = v;
      return compare(d);
   }
   mpfi_t& data() BOOST_NOEXCEPT
   {
      BOOST_ASSERT(m_data[0].left._mpfr_d);
      return m_data;
   }
   const mpfi_t& data()const BOOST_NOEXCEPT
   {
      BOOST_ASSERT(m_data[0].left._mpfr_d);
      return m_data;
   }
   mpfr_ptr left_data() BOOST_NOEXCEPT
   {
      BOOST_ASSERT(m_data[0].left._mpfr_d);
      return &(m_data[0].left);
   }
   mpfr_srcptr left_data()const BOOST_NOEXCEPT
   {
      BOOST_ASSERT(m_data[0].left._mpfr_d);
      return &(m_data[0].left);
   }
   mpfr_ptr right_data() BOOST_NOEXCEPT
   {
      BOOST_ASSERT(m_data[0].left._mpfr_d);
      return &(m_data[0].right);
   }
   mpfr_srcptr right_data()const BOOST_NOEXCEPT
   {
      BOOST_ASSERT(m_data[0].left._mpfr_d);
      return &(m_data[0].right);
   }
protected:
   mpfi_t m_data;
   static unsigned& get_default_precision() BOOST_NOEXCEPT
   {
      static unsigned val = 50;
      return val;
   }
};

} // namespace detail

template <unsigned digits10>
struct mpfi_float_backend : public detail::mpfi_float_imp<digits10>
{
   mpfi_float_backend() : detail::mpfi_float_imp<digits10>() {}
   mpfi_float_backend(const mpfi_float_backend& o) : detail::mpfi_float_imp<digits10>(o) {}
#ifndef BOOST_NO_CXX11_RVALUE_REFERENCES
   mpfi_float_backend(mpfi_float_backend&& o) : detail::mpfi_float_imp<digits10>(static_cast<detail::mpfi_float_imp<digits10>&&>(o)) {}
#endif
   template <unsigned D>
   mpfi_float_backend(const mpfi_float_backend<D>& val, typename enable_if_c<D <= digits10>::type* = 0)
       : detail::mpfi_float_imp<digits10>()
   {
      mpfi_set(this->m_data, val.data());
   }
   template <unsigned D>
   explicit mpfi_float_backend(const mpfi_float_backend<D>& val, typename disable_if_c<D <= digits10>::type* = 0)
       : detail::mpfi_float_imp<digits10>()
   {
      mpfi_set(this->m_data, val.data());
   }
   mpfi_float_backend(const mpfi_t val)
       : detail::mpfi_float_imp<digits10>()
   {
      mpfi_set(this->m_data, val);
   }
   mpfi_float_backend& operator=(const mpfi_float_backend& o)
   {
      *static_cast<detail::mpfi_float_imp<digits10>*>(this) = static_cast<detail::mpfi_float_imp<digits10> const&>(o);
      return *this;
   }
   template <unsigned D>
   mpfi_float_backend(const mpfr_float_backend<D>& val, typename enable_if_c<D <= digits10>::type* = 0)
       : detail::mpfi_float_imp<digits10>()
   {
      mpfi_set_fr(this->m_data, val.data());
   }
   template <unsigned D>
   mpfi_float_backend& operator=(const mpfr_float_backend<D>& val)
   {
      mpfi_set_fr(this->m_data, val.data());
      return *this;
   }
   template <unsigned D>
   explicit mpfi_float_backend(const mpfr_float_backend<D>& val, typename disable_if_c<D <= digits10>::type* = 0)
       : detail::mpfi_float_imp<digits10>()
   {
      mpfi_set_fr(this->m_data, val.data());
   }
#ifndef BOOST_NO_CXX11_RVALUE_REFERENCES
   mpfi_float_backend& operator=(mpfi_float_backend&& o) BOOST_NOEXCEPT
   {
      *static_cast<detail::mpfi_float_imp<digits10>*>(this) = static_cast<detail::mpfi_float_imp<digits10>&&>(o);
      return *this;
   }
#endif
   template <class V>
   mpfi_float_backend& operator=(const V& v)
   {
      *static_cast<detail::mpfi_float_imp<digits10>*>(this) = v;
      return *this;
   }
   mpfi_float_backend& operator=(const mpfi_t val)
   {
      mpfi_set(this->m_data, val);
      return *this;
   }
   // We don't change our precision here, this is a fixed precision type:
   template <unsigned D>
   mpfi_float_backend& operator=(const mpfi_float_backend<D>& val)
   {
      mpfi_set(this->m_data, val.data());
      return *this;
   }
};

template <>
struct mpfi_float_backend<0> : public detail::mpfi_float_imp<0>
{
   mpfi_float_backend() : detail::mpfi_float_imp<0>() {}
   mpfi_float_backend(const mpfi_t val)
      : detail::mpfi_float_imp<0>(mpfi_get_prec(val))
   {
      mpfi_set(this->m_data, val);
   }
   mpfi_float_backend(const mpfi_float_backend& o) : detail::mpfi_float_imp<0>(o) {}
#ifndef BOOST_NO_CXX11_RVALUE_REFERENCES
   mpfi_float_backend(mpfi_float_backend&& o) BOOST_NOEXCEPT : detail::mpfi_float_imp<0>(static_cast<detail::mpfi_float_imp<0>&&>(o)) {}
#endif
   mpfi_float_backend(const mpfi_float_backend& o, unsigned digits10)
      : detail::mpfi_float_imp<0>(digits10)
   {
      *this = o;
   }
   template <unsigned D>
   mpfi_float_backend(const mpfi_float_backend<D>& val)
      : detail::mpfi_float_imp<0>(mpfi_get_prec(val.data()))
   {
      mpfi_set(this->m_data, val.data());
   }
   mpfi_float_backend& operator=(const mpfi_float_backend& o)
   {
      mpfi_set_prec(this->m_data, mpfi_get_prec(o.data()));
      mpfi_set(this->m_data, o.data());
      return *this;
   }
#ifndef BOOST_NO_CXX11_RVALUE_REFERENCES
   mpfi_float_backend& operator=(mpfi_float_backend&& o) BOOST_NOEXCEPT
   {
      *static_cast<detail::mpfi_float_imp<0>*>(this) = static_cast<detail::mpfi_float_imp<0> &&>(o);
      return *this;
   }
#endif
   template <class V>
   mpfi_float_backend& operator=(const V& v)
   {
      *static_cast<detail::mpfi_float_imp<0>*>(this) = v;
      return *this;
   }
   mpfi_float_backend& operator=(const mpfi_t val)
   {
      mpfi_set_prec(this->m_data, mpfi_get_prec(val));
      mpfi_set(this->m_data, val);
      return *this;
   }
   template <unsigned D>
   mpfi_float_backend& operator=(const mpfi_float_backend<D>& val)
   {
      mpfi_set_prec(this->m_data, mpfi_get_prec(val.data()));
      mpfi_set(this->m_data, val.data());
      return *this;
   }
   static unsigned default_precision() BOOST_NOEXCEPT
   {
      return get_default_precision();
   }
   static void default_precision(unsigned v) BOOST_NOEXCEPT
   {
      get_default_precision() = v;
   }
   unsigned precision()const BOOST_NOEXCEPT
   {
      return multiprecision::detail::digits2_2_10(mpfi_get_prec(this->m_data));
   }
   void precision(unsigned digits10) BOOST_NOEXCEPT
   {
      mpfi_set_prec(this->m_data, multiprecision::detail::digits2_2_10((digits10)));
   }
};

template <unsigned digits10, class T>
inline typename enable_if<is_arithmetic<T>, bool>::type eval_eq(const mpfi_float_backend<digits10>& a, const T& b) BOOST_NOEXCEPT
{
   return a.compare(b) == 0;
}
template <unsigned digits10, class T>
inline typename enable_if<is_arithmetic<T>, bool>::type eval_lt(const mpfi_float_backend<digits10>& a, const T& b) BOOST_NOEXCEPT
{
   return a.compare(b) < 0;
}
template <unsigned digits10, class T>
inline typename enable_if<is_arithmetic<T>, bool>::type eval_gt(const mpfi_float_backend<digits10>& a, const T& b) BOOST_NOEXCEPT
{
   return a.compare(b) > 0;
}

template <unsigned D1, unsigned D2>
inline void eval_add(mpfi_float_backend<D1>& result, const mpfi_float_backend<D2>& o)
{
   mpfi_add(result.data(), result.data(), o.data());
}
template <unsigned D1, unsigned D2>
inline void eval_subtract(mpfi_float_backend<D1>& result, const mpfi_float_backend<D2>& o)
{
   mpfi_sub(result.data(), result.data(), o.data());
}
template <unsigned D1, unsigned D2>
inline void eval_multiply(mpfi_float_backend<D1>& result, const mpfi_float_backend<D2>& o)
{
   if((void*)&result == (void*)&o)
      mpfi_sqr(result.data(), o.data());
   else
      mpfi_mul(result.data(), result.data(), o.data());
}
template <unsigned D1, unsigned D2>
inline void eval_divide(mpfi_float_backend<D1>& result, const mpfi_float_backend<D2>& o)
{
   mpfi_div(result.data(), result.data(), o.data());
}
template <unsigned digits10>
inline void eval_add(mpfi_float_backend<digits10>& result, unsigned long i)
{
   mpfi_add_ui(result.data(), result.data(), i);
}
template <unsigned digits10>
inline void eval_subtract(mpfi_float_backend<digits10>& result, unsigned long i)
{
   mpfi_sub_ui(result.data(), result.data(), i);
}
template <unsigned digits10>
inline void eval_multiply(mpfi_float_backend<digits10>& result, unsigned long i)
{
   mpfi_mul_ui(result.data(), result.data(), i);
}
template <unsigned digits10>
inline void eval_divide(mpfi_float_backend<digits10>& result, unsigned long i)
{
   mpfi_div_ui(result.data(), result.data(), i);
}
template <unsigned digits10>
inline void eval_add(mpfi_float_backend<digits10>& result, long i)
{
   if(i > 0)
      mpfi_add_ui(result.data(), result.data(), i);
   else
      mpfi_sub_ui(result.data(), result.data(), boost::multiprecision::detail::unsigned_abs(i));
}
template <unsigned digits10>
inline void eval_subtract(mpfi_float_backend<digits10>& result, long i)
{
   if(i > 0)
      mpfi_sub_ui(result.data(), result.data(), i);
   else
      mpfi_add_ui(result.data(), result.data(), boost::multiprecision::detail::unsigned_abs(i));
}
template <unsigned digits10>
inline void eval_multiply(mpfi_float_backend<digits10>& result, long i)
{
   mpfi_mul_ui(result.data(), result.data(), boost::multiprecision::detail::unsigned_abs(i));
   if(i < 0)
      mpfi_neg(result.data(), result.data());
}
template <unsigned digits10>
inline void eval_divide(mpfi_float_backend<digits10>& result, long i)
{
   mpfi_div_ui(result.data(), result.data(), boost::multiprecision::detail::unsigned_abs(i));
   if(i < 0)
      mpfi_neg(result.data(), result.data());
}
//
// Specialised 3 arg versions of the basic operators:
//
template <unsigned D1, unsigned D2, unsigned D3>
inline void eval_add(mpfi_float_backend<D1>& a, const mpfi_float_backend<D2>& x, const mpfi_float_backend<D3>& y)
{
   mpfi_add(a.data(), x.data(), y.data());
}
template <unsigned D1, unsigned D2>
inline void eval_add(mpfi_float_backend<D1>& a, const mpfi_float_backend<D2>& x, unsigned long y)
{
   mpfi_add_ui(a.data(), x.data(), y);
}
template <unsigned D1, unsigned D2>
inline void eval_add(mpfi_float_backend<D1>& a, const mpfi_float_backend<D2>& x, long y)
{
   if(y < 0)
      mpfi_sub_ui(a.data(), x.data(), boost::multiprecision::detail::unsigned_abs(y));
   else
      mpfi_add_ui(a.data(), x.data(), y);
}
template <unsigned D1, unsigned D2>
inline void eval_add(mpfi_float_backend<D1>& a, unsigned long x, const mpfi_float_backend<D2>& y)
{
   mpfi_add_ui(a.data(), y.data(), x);
}
template <unsigned D1, unsigned D2>
inline void eval_add(mpfi_float_backend<D1>& a, long x, const mpfi_float_backend<D2>& y)
{
   if(x < 0)
   {
      mpfi_ui_sub(a.data(), boost::multiprecision::detail::unsigned_abs(x), y.data());
      mpfi_neg(a.data(), a.data());
   }
   else
      mpfi_add_ui(a.data(), y.data(), x);
}
template <unsigned D1, unsigned D2, unsigned D3>
inline void eval_subtract(mpfi_float_backend<D1>& a, const mpfi_float_backend<D2>& x, const mpfi_float_backend<D3>& y)
{
   mpfi_sub(a.data(), x.data(), y.data());
}
template <unsigned D1, unsigned D2>
inline void eval_subtract(mpfi_float_backend<D1>& a, const mpfi_float_backend<D2>& x, unsigned long y)
{
   mpfi_sub_ui(a.data(), x.data(), y);
}
template <unsigned D1, unsigned D2>
inline void eval_subtract(mpfi_float_backend<D1>& a, const mpfi_float_backend<D2>& x, long y)
{
   if(y < 0)
      mpfi_add_ui(a.data(), x.data(), boost::multiprecision::detail::unsigned_abs(y));
   else
      mpfi_sub_ui(a.data(), x.data(), y);
}
template <unsigned D1, unsigned D2>
inline void eval_subtract(mpfi_float_backend<D1>& a, unsigned long x, const mpfi_float_backend<D2>& y)
{
   mpfi_ui_sub(a.data(), x, y.data());
}
template <unsigned D1, unsigned D2>
inline void eval_subtract(mpfi_float_backend<D1>& a, long x, const mpfi_float_backend<D2>& y)
{
   if(x < 0)
   {
      mpfi_add_ui(a.data(), y.data(), boost::multiprecision::detail::unsigned_abs(x));
      mpfi_neg(a.data(), a.data());
   }
   else
      mpfi_ui_sub(a.data(), x, y.data());
}

template <unsigned D1, unsigned D2, unsigned D3>
inline void eval_multiply(mpfi_float_backend<D1>& a, const mpfi_float_backend<D2>& x, const mpfi_float_backend<D3>& y)
{
   if((void*)&x == (void*)&y)
      mpfi_sqr(a.data(), x.data());
   else
      mpfi_mul(a.data(), x.data(), y.data());
}
template <unsigned D1, unsigned D2>
inline void eval_multiply(mpfi_float_backend<D1>& a, const mpfi_float_backend<D2>& x, unsigned long y)
{
   mpfi_mul_ui(a.data(), x.data(), y);
}
template <unsigned D1, unsigned D2>
inline void eval_multiply(mpfi_float_backend<D1>& a, const mpfi_float_backend<D2>& x, long y)
{
   if(y < 0)
   {
      mpfi_mul_ui(a.data(), x.data(), boost::multiprecision::detail::unsigned_abs(y));
      a.negate();
   }
   else
      mpfi_mul_ui(a.data(), x.data(), y);
}
template <unsigned D1, unsigned D2>
inline void eval_multiply(mpfi_float_backend<D1>& a, unsigned long x, const mpfi_float_backend<D2>& y)
{
   mpfi_mul_ui(a.data(), y.data(), x);
}
template <unsigned D1, unsigned D2>
inline void eval_multiply(mpfi_float_backend<D1>& a, long x, const mpfi_float_backend<D2>& y)
{
   if(x < 0)
   {
      mpfi_mul_ui(a.data(), y.data(), boost::multiprecision::detail::unsigned_abs(x));
      mpfi_neg(a.data(), a.data());
   }
   else
      mpfi_mul_ui(a.data(), y.data(), x);
}

template <unsigned D1, unsigned D2, unsigned D3>
inline void eval_divide(mpfi_float_backend<D1>& a, const mpfi_float_backend<D2>& x, const mpfi_float_backend<D3>& y)
{
   mpfi_div(a.data(), x.data(), y.data());
}
template <unsigned D1, unsigned D2>
inline void eval_divide(mpfi_float_backend<D1>& a, const mpfi_float_backend<D2>& x, unsigned long y)
{
   mpfi_div_ui(a.data(), x.data(), y);
}
template <unsigned D1, unsigned D2>
inline void eval_divide(mpfi_float_backend<D1>& a, const mpfi_float_backend<D2>& x, long y)
{
   if(y < 0)
   {
      mpfi_div_ui(a.data(), x.data(), boost::multiprecision::detail::unsigned_abs(y));
      a.negate();
   }
   else
      mpfi_div_ui(a.data(), x.data(), y);
}
template <unsigned D1, unsigned D2>
inline void eval_divide(mpfi_float_backend<D1>& a, unsigned long x, const mpfi_float_backend<D2>& y)
{
   mpfi_ui_div(a.data(), x, y.data());
}
template <unsigned D1, unsigned D2>
inline void eval_divide(mpfi_float_backend<D1>& a, long x, const mpfi_float_backend<D2>& y)
{
   if(x < 0)
   {
      mpfi_ui_div(a.data(), boost::multiprecision::detail::unsigned_abs(x), y.data());
      mpfi_neg(a.data(), a.data());
   }
   else
      mpfi_ui_div(a.data(), x, y.data());
}

template <unsigned digits10>
inline bool eval_is_zero(const mpfi_float_backend<digits10>& val) BOOST_NOEXCEPT
{
   return 0 != mpfi_is_zero(val.data());
}
template <unsigned digits10>
inline int eval_get_sign(const mpfi_float_backend<digits10>& val)
{
   return detail::mpfi_sgn(val.data());
}

template <unsigned digits10>
inline void eval_convert_to(unsigned long* result, const mpfi_float_backend<digits10>& val)
{
   mpfr_float_backend<digits10> t;
   mpfi_mid(t.data(), val.data());
   eval_convert_to(result, t);
}
template <unsigned digits10>
inline void eval_convert_to(long* result, const mpfi_float_backend<digits10>& val)
{
   mpfr_float_backend<digits10> t;
   mpfi_mid(t.data(), val.data());
   eval_convert_to(result, t);
}
#ifdef _MPFR_H_HAVE_INTMAX_T
template <unsigned digits10>
inline void eval_convert_to(boost::ulong_long_type* result, const mpfi_float_backend<digits10>& val)
{
   mpfr_float_backend<digits10> t;
   mpfi_mid(t.data(), val.data());
   eval_convert_to(result, t);
}
template <unsigned digits10>
inline void eval_convert_to(boost::long_long_type* result, const mpfi_float_backend<digits10>& val)
{
   mpfr_float_backend<digits10> t;
   mpfi_mid(t.data(), val.data());
   eval_convert_to(result, t);
}
#endif
template <unsigned digits10>
inline void eval_convert_to(double* result, const mpfi_float_backend<digits10>& val) BOOST_NOEXCEPT
{
   *result = mpfi_get_d(val.data());
}
template <unsigned digits10>
inline void eval_convert_to(long double* result, const mpfi_float_backend<digits10>& val) BOOST_NOEXCEPT
{
   mpfr_float_backend<digits10> t;
   mpfi_mid(t.data(), val.data());
   eval_convert_to(result, t);
}

template <unsigned D1, unsigned D2, mpfr_allocation_type AllocationType>
inline void assign_components(mpfi_float_backend<D1>& result, const mpfr_float_backend<D2, AllocationType>& a, const mpfr_float_backend<D2, AllocationType>& b)
{
   using default_ops::eval_fpclassify;
   if(eval_fpclassify(a) == (int)FP_NAN)
   {
      mpfi_set_fr(result.data(), a.data());
   }
   else if(eval_fpclassify(b) == (int)FP_NAN)
   {
      mpfi_set_fr(result.data(), b.data());
   }
   else
   {
      if(a.compare(b) > 0)
      {
         BOOST_THROW_EXCEPTION(std::runtime_error("Attempt to create interval with invalid range (start is greater than end)."));
      }
      mpfi_interv_fr(result.data(), a.data(), b.data());
   }
}

template <unsigned Digits10, class V>
inline typename enable_if_c<is_convertible<V, number<mpfr_float_backend<Digits10, allocate_dynamic>, et_on> >::value >::type 
   assign_components(mpfi_float_backend<Digits10>& result, const V& a, const V& b)
{
   number<mpfr_float_backend<Digits10, allocate_dynamic>, et_on> x(a), y(b);
   assign_components(result, x.backend(), y.backend());
}

//
// Native non-member operations:
//
template <unsigned Digits10>
inline void eval_sqrt(mpfi_float_backend<Digits10>& result, const mpfi_float_backend<Digits10>& val)
{
   mpfi_sqrt(result.data(), val.data());
}

template <unsigned Digits10>
inline void eval_abs(mpfi_float_backend<Digits10>& result, const mpfi_float_backend<Digits10>& val)
{
   mpfi_abs(result.data(), val.data());
}

template <unsigned Digits10>
inline void eval_fabs(mpfi_float_backend<Digits10>& result, const mpfi_float_backend<Digits10>& val)
{
   mpfi_abs(result.data(), val.data());
}
template <unsigned Digits10>
inline void eval_ceil(mpfi_float_backend<Digits10>& result, const mpfi_float_backend<Digits10>& val)
{
   mpfr_float_backend<Digits10> a, b;
   mpfr_set(a.data(), val.left_data(), GMP_RNDN);
   mpfr_set(b.data(), val.right_data(), GMP_RNDN);
   eval_ceil(a, a);
   eval_ceil(b, b);
   if(a.compare(b) != 0)
   {
      BOOST_THROW_EXCEPTION(interval_error("Attempt to take the ceil of a value that straddles an integer boundary."));
   }
   mpfi_set_fr(result.data(), a.data());
}
template <unsigned Digits10>
inline void eval_floor(mpfi_float_backend<Digits10>& result, const mpfi_float_backend<Digits10>& val)
{
   mpfr_float_backend<Digits10> a, b;
   mpfr_set(a.data(), val.left_data(), GMP_RNDN);
   mpfr_set(b.data(), val.right_data(), GMP_RNDN);
   eval_floor(a, a);
   eval_floor(b, b);
   if(a.compare(b) != 0)
   {
      BOOST_THROW_EXCEPTION(interval_error("Attempt to take the floor of a value that straddles an integer boundary."));
   }
   mpfi_set_fr(result.data(), a.data());
}
template <unsigned Digits10>
inline void eval_ldexp(mpfi_float_backend<Digits10>& result, const mpfi_float_backend<Digits10>& val, long e)
{
   if(e > 0)
      mpfi_mul_2exp(result.data(), val.data(), e);
   else if(e < 0)
      mpfi_div_2exp(result.data(), val.data(), -e);
   else
      result = val;
}
template <unsigned Digits10>
inline void eval_frexp(mpfi_float_backend<Digits10>& result, const mpfi_float_backend<Digits10>& val, int* e)
{
   mpfr_float_backend<Digits10> t, rt;
   mpfi_mid(t.data(), val.data());
   eval_frexp(rt, t, e);
   eval_ldexp(result, val, -*e);
}
template <unsigned Digits10>
inline void eval_frexp(mpfi_float_backend<Digits10>& result, const mpfi_float_backend<Digits10>& val, long* e)
{
   mpfr_float_backend<Digits10> t, rt;
   mpfi_mid(t.data(), val.data());
   eval_frexp(rt, t, e);
   eval_ldexp(result, val, -*e);
}

template <unsigned Digits10>
inline int eval_fpclassify(const mpfi_float_backend<Digits10>& val) BOOST_NOEXCEPT
{
   return mpfi_inf_p(val.data()) ? FP_INFINITE : mpfi_nan_p(val.data()) ? FP_NAN : mpfi_is_zero(val.data()) ? FP_ZERO : FP_NORMAL;
}

template <unsigned Digits10>
inline void eval_pow(mpfi_float_backend<Digits10>& result, const mpfi_float_backend<Digits10>& b, const mpfi_float_backend<Digits10>& e)
{
   typedef typename boost::multiprecision::detail::canonical<unsigned, mpfi_float_backend<Digits10> >::type ui_type;
   using default_ops::eval_get_sign;
   int s = eval_get_sign(b);
   if(s == 0)
   {
      if(eval_get_sign(e) == 0)
      {
         result = ui_type(1);
      }
      else
      {
         result = ui_type(0);
      }
      return;
   }
   if(s < 0)
   {
      if(eval_get_sign(e) < 0)
      {
         mpfi_float_backend<Digits10> t1, t2;
         t1 = e;
         t1.negate();
         eval_pow(t2, b, t1);
         t1 = ui_type(1);
         eval_divide(result, t1, t2);
         return;
      }
      typename boost::multiprecision::detail::canonical<boost::uintmax_t, mpfi_float_backend<Digits10> >::type an;
      try
      {
         using default_ops::eval_convert_to;
         eval_convert_to(&an, e);
         if(e.compare(an) == 0)
         {
            mpfi_float_backend<Digits10> pb(b);
            pb.negate();
            eval_pow(result, pb, e);
            if(an & 1u)
               result.negate();
            return;
         }
      }
      catch(const std::exception&)
      {
         // conversion failed, just fall through, value is not an integer.
      }
      result = std::numeric_limits<number<mpfi_float_backend<Digits10>, et_on> >::quiet_NaN().backend();
      return;
   }
   mpfi_log(result.data(), b.data());
   mpfi_mul(result.data(), result.data(), e.data());
   mpfi_exp(result.data(), result.data());
}

template <unsigned Digits10>
inline void eval_exp(mpfi_float_backend<Digits10>& result, const mpfi_float_backend<Digits10>& arg)
{
   mpfi_exp(result.data(), arg.data());
}

template <unsigned Digits10>
inline void eval_log(mpfi_float_backend<Digits10>& result, const mpfi_float_backend<Digits10>& arg)
{
   mpfi_log(result.data(), arg.data());
}

template <unsigned Digits10>
inline void eval_log10(mpfi_float_backend<Digits10>& result, const mpfi_float_backend<Digits10>& arg)
{
   mpfi_log10(result.data(), arg.data());
}

template <unsigned Digits10>
inline void eval_sin(mpfi_float_backend<Digits10>& result, const mpfi_float_backend<Digits10>& arg)
{
   mpfi_sin(result.data(), arg.data());
}

template <unsigned Digits10>
inline void eval_cos(mpfi_float_backend<Digits10>& result, const mpfi_float_backend<Digits10>& arg)
{
   mpfi_cos(result.data(), arg.data());
}

template <unsigned Digits10>
inline void eval_tan(mpfi_float_backend<Digits10>& result, const mpfi_float_backend<Digits10>& arg)
{
   mpfi_tan(result.data(), arg.data());
}

template <unsigned Digits10>
inline void eval_asin(mpfi_float_backend<Digits10>& result, const mpfi_float_backend<Digits10>& arg)
{
   mpfi_asin(result.data(), arg.data());
}

template <unsigned Digits10>
inline void eval_acos(mpfi_float_backend<Digits10>& result, const mpfi_float_backend<Digits10>& arg)
{
   mpfi_acos(result.data(), arg.data());
}

template <unsigned Digits10>
inline void eval_atan(mpfi_float_backend<Digits10>& result, const mpfi_float_backend<Digits10>& arg)
{
   mpfi_atan(result.data(), arg.data());
}

template <unsigned Digits10>
inline void eval_atan2(mpfi_float_backend<Digits10>& result, const mpfi_float_backend<Digits10>& arg1, const mpfi_float_backend<Digits10>& arg2)
{
   mpfi_atan2(result.data(), arg1.data(), arg2.data());
}

template <unsigned Digits10>
inline void eval_sinh(mpfi_float_backend<Digits10>& result, const mpfi_float_backend<Digits10>& arg)
{
   mpfi_sinh(result.data(), arg.data());
}

template <unsigned Digits10>
inline void eval_cosh(mpfi_float_backend<Digits10>& result, const mpfi_float_backend<Digits10>& arg)
{
   mpfi_cosh(result.data(), arg.data());
}

template <unsigned Digits10>
inline void eval_tanh(mpfi_float_backend<Digits10>& result, const mpfi_float_backend<Digits10>& arg)
{
   mpfi_tanh(result.data(), arg.data());
}

} // namespace backends

#ifdef BOOST_NO_SFINAE_EXPR

namespace detail{

template<unsigned D1, unsigned D2>
struct is_explicitly_convertible<backends::mpfi_float_backend<D1>, backends::mpfi_float_backend<D2> > : public mpl::true_ {};

}

#endif

template<>
struct number_category<detail::canonical<mpfi_t, backends::mpfi_float_backend<0> >::type> : public mpl::int_<number_kind_floating_point>{};
template <unsigned Digits10>
struct is_interval_number<backends::mpfi_float_backend<Digits10> > : public mpl::true_ {};

using boost::multiprecision::backends::mpfi_float_backend;

typedef number<mpfi_float_backend<50> >    mpfi_float_50;
typedef number<mpfi_float_backend<100> >   mpfi_float_100;
typedef number<mpfi_float_backend<500> >   mpfi_float_500;
typedef number<mpfi_float_backend<1000> >  mpfi_float_1000;
typedef number<mpfi_float_backend<0> >     mpfi_float;

//
// Special interval specific functions:
//
template <unsigned Digits10, expression_template_option ExpressionTemplates>
inline number<mpfr_float_backend<Digits10>, ExpressionTemplates> lower(const number<mpfi_float_backend<Digits10>, ExpressionTemplates>& val)
{
   number<mpfr_float_backend<Digits10> > result;
   mpfr_set(result.backend().data(), val.backend().left_data(), GMP_RNDN);
   return result;
}

template <unsigned Digits10, expression_template_option ExpressionTemplates>
inline number<mpfr_float_backend<Digits10>, ExpressionTemplates> upper(const number<mpfi_float_backend<Digits10>, ExpressionTemplates>& val)
{
   number<mpfr_float_backend<Digits10> > result;
   mpfr_set(result.backend().data(), val.backend().right_data(), GMP_RNDN);
   return result;
}

template <unsigned Digits10, expression_template_option ExpressionTemplates>
inline number<mpfr_float_backend<Digits10>, ExpressionTemplates> median(const number<mpfi_float_backend<Digits10>, ExpressionTemplates>& val)
{
   number<mpfr_float_backend<Digits10> > result;
   mpfi_mid(result.backend().data(), val.backend().data());
   return result;
}

template <unsigned Digits10, expression_template_option ExpressionTemplates>
inline number<mpfr_float_backend<Digits10>, ExpressionTemplates> width(const number<mpfi_float_backend<Digits10>, ExpressionTemplates>& val)
{
   number<mpfr_float_backend<Digits10> > result;
   mpfi_diam_abs(result.backend().data(), val.backend().data());
   return result;
}

template <unsigned Digits10, expression_template_option ExpressionTemplates>
inline number<mpfi_float_backend<Digits10>, ExpressionTemplates> intersect(const number<mpfi_float_backend<Digits10>, ExpressionTemplates>& a, const number<mpfi_float_backend<Digits10>, ExpressionTemplates>&  b)
{
   number<mpfi_float_backend<Digits10>, ExpressionTemplates> result;
   mpfi_intersect(result.backend().data(), a.backend().data(), b.backend().data());
   return result;
}

template <unsigned Digits10, expression_template_option ExpressionTemplates>
inline number<mpfi_float_backend<Digits10>, ExpressionTemplates> hull(const number<mpfi_float_backend<Digits10>, ExpressionTemplates>& a, const number<mpfi_float_backend<Digits10>, ExpressionTemplates>&  b)
{
   number<mpfi_float_backend<Digits10>, ExpressionTemplates> result;
   mpfi_union(result.backend().data(), a.backend().data(), b.backend().data());
   return result;
}

template <unsigned Digits10, expression_template_option ExpressionTemplates>
inline bool overlap(const number<mpfi_float_backend<Digits10>, ExpressionTemplates>& a, const number<mpfi_float_backend<Digits10>, ExpressionTemplates>&  b)
{
  return (lower(a) <= lower(b) && lower(b) <= upper(a)) ||
         (lower(b) <= lower(a) && lower(a) <= upper(b));
}

template <unsigned Digits10, expression_template_option ExpressionTemplates1, expression_template_option ExpressionTemplates2>
inline bool in(const number<mpfr_float_backend<Digits10>, ExpressionTemplates1>& a, const number<mpfi_float_backend<Digits10>, ExpressionTemplates2>&  b)
{
  return mpfi_is_inside_fr(a.backend().data(), b.backend().data()) != 0;
}

template <unsigned Digits10, expression_template_option ExpressionTemplates>
inline bool zero_in(const number<mpfi_float_backend<Digits10>, ExpressionTemplates>&  a)
{
  return mpfi_has_zero(a.backend().data()) != 0;
}

template <unsigned Digits10, expression_template_option ExpressionTemplates>
inline bool subset(const number<mpfi_float_backend<Digits10>, ExpressionTemplates>& a, const number<mpfi_float_backend<Digits10>, ExpressionTemplates>&  b)
{
  return mpfi_is_inside(a.backend().data(), b.backend().data()) != 0;
}

template <unsigned Digits10, expression_template_option ExpressionTemplates>
inline bool proper_subset(const number<mpfi_float_backend<Digits10>, ExpressionTemplates>& a, const number<mpfi_float_backend<Digits10>, ExpressionTemplates>&  b)
{
  return mpfi_is_strictly_inside(a.backend().data(), b.backend().data()) != 0;
}

template <unsigned Digits10, expression_template_option ExpressionTemplates>
inline bool empty(const number<mpfi_float_backend<Digits10>, ExpressionTemplates>&  a)
{
  return mpfi_is_empty(a.backend().data()) != 0;
}

template <unsigned Digits10, expression_template_option ExpressionTemplates>
inline bool singleton(const number<mpfi_float_backend<Digits10>, ExpressionTemplates>&  a)
{
  return mpfr_cmp(a.backend().left_data(), a.backend().right_data()) == 0;
}

template <unsigned Digits10, expression_template_option ExpressionTemplates>
struct component_type<number<mpfi_float_backend<Digits10>, ExpressionTemplates> >
{
   typedef number<mpfr_float_backend<Digits10>, ExpressionTemplates> type;
};

} // namespace multiprecision

namespace math{

namespace tools{

template <>
inline int digits<boost::multiprecision::mpfi_float>()
#ifdef BOOST_MATH_NOEXCEPT
   BOOST_NOEXCEPT
#endif
{
   return boost::multiprecision::backends::detail::get_default_precision();
}
template <>
inline int digits<boost::multiprecision::number<boost::multiprecision::mpfi_float_backend<0>, boost::multiprecision::et_off> >()
#ifdef BOOST_MATH_NOEXCEPT
   BOOST_NOEXCEPT
#endif
{
   return boost::multiprecision::backends::detail::get_default_precision();
}

} // namespace tools

namespace constants{ namespace detail{

template <class T> struct constant_pi;
template <class T> struct constant_ln_two;
template <class T> struct constant_euler;
template <class T> struct constant_catalan;

//
// Initializer: ensure all our constants are initialized prior to the first call of main:
//
template <class T>
struct mpfi_initializer
{
   struct init
   {
      init()
      {
         boost::math::constants::pi<T>();
         boost::math::constants::ln_two<T>();
         boost::math::constants::euler<T>();
         boost::math::constants::catalan<T>();
      }
      void force_instantiate()const{}
   };
   static const init initializer;
   static void force_instantiate()
   {
      initializer.force_instantiate();
   }
};

template <class T>
const typename mpfi_initializer<T>::init mpfi_initializer<T>::initializer;

template<unsigned Digits10, boost::multiprecision::expression_template_option ExpressionTemplates>
struct constant_pi<boost::multiprecision::number<boost::multiprecision::mpfi_float_backend<Digits10>, ExpressionTemplates> >
{
   typedef boost::multiprecision::number<boost::multiprecision::mpfi_float_backend<Digits10>, ExpressionTemplates> result_type;
   template<int N>
   static inline result_type const& get(const mpl::int_<N>&)
   {
      mpfi_initializer<result_type>::force_instantiate();
      static result_type result;
      static bool has_init = false;
      if(!has_init)
      {
         has_init = true;
         mpfi_const_pi(result.backend().data());
      }
      return result;
   }
};
template<unsigned Digits10, boost::multiprecision::expression_template_option ExpressionTemplates>
struct constant_ln_two<boost::multiprecision::number<boost::multiprecision::mpfi_float_backend<Digits10>, ExpressionTemplates> >
{
   typedef boost::multiprecision::number<boost::multiprecision::mpfi_float_backend<Digits10>, ExpressionTemplates> result_type;
   template<int N>
   static inline result_type const& get(const mpl::int_<N>&)
   {
      mpfi_initializer<result_type>::force_instantiate();
      static result_type result;
      static bool has_init = false;
      if(!has_init)
      {
         has_init = true;
         mpfi_const_log2(result.backend().data());
      }
      return result;
   }
};
template<unsigned Digits10, boost::multiprecision::expression_template_option ExpressionTemplates>
struct constant_euler<boost::multiprecision::number<boost::multiprecision::mpfi_float_backend<Digits10>, ExpressionTemplates> >
{
   typedef boost::multiprecision::number<boost::multiprecision::mpfi_float_backend<Digits10>, ExpressionTemplates> result_type;
   template<int N>
   static inline result_type const& get(const mpl::int_<N>&)
   {
      mpfi_initializer<result_type>::force_instantiate();
      static result_type result;
      static bool has_init = false;
      if(!has_init)
      {
         has_init = true;
         mpfi_const_euler(result.backend().data());
      }
      return result;
   }
};
template<unsigned Digits10, boost::multiprecision::expression_template_option ExpressionTemplates>
struct constant_catalan<boost::multiprecision::number<boost::multiprecision::mpfi_float_backend<Digits10>, ExpressionTemplates> >
{
   typedef boost::multiprecision::number<boost::multiprecision::mpfi_float_backend<Digits10>, ExpressionTemplates> result_type;
   template<int N>
   static inline result_type const& get(const mpl::int_<N>&)
   {
      mpfi_initializer<result_type>::force_instantiate();
      static result_type result;
      static bool has_init = false;
      if(!has_init)
      {
         has_init = true;
         mpfi_const_catalan(result.backend().data());
      }
      return result;
   }
};

}} // namespaces

}}  // namespaces

namespace std{

//
// numeric_limits [partial] specializations for the types declared in this header:
//
template<unsigned Digits10, boost::multiprecision::expression_template_option ExpressionTemplates>
class numeric_limits<boost::multiprecision::number<boost::multiprecision::mpfi_float_backend<Digits10>, ExpressionTemplates> >
{
   typedef boost::multiprecision::number<boost::multiprecision::mpfi_float_backend<Digits10>, ExpressionTemplates> number_type;
public:
   BOOST_STATIC_CONSTEXPR bool is_specialized = true;
   static number_type (min)()
   {
      initializer.do_nothing();
      static std::pair<bool, number_type> value;
      if(!value.first)
      {
         value.first = true;
         value.second = 0.5;
         mpfi_div_2exp(value.second.backend().data(), value.second.backend().data(), -mpfr_get_emin());
      }
      return value.second;
   }
   static number_type (max)()
   {
      initializer.do_nothing();
      static std::pair<bool, number_type> value;
      if(!value.first)
      {
         value.first = true;
         value.second = 0.5;
         mpfi_mul_2exp(value.second.backend().data(), value.second.backend().data(), mpfr_get_emax());
      }
      return value.second;
   }
   BOOST_STATIC_CONSTEXPR number_type lowest()
   {
      return -(max)();
   }
   BOOST_STATIC_CONSTEXPR int digits = static_cast<int>((Digits10 * 1000L) / 301L + ((Digits10 * 1000L) % 301 ? 2 : 1));
   BOOST_STATIC_CONSTEXPR int digits10 = Digits10;
   // Is this really correct???
   BOOST_STATIC_CONSTEXPR int max_digits10 = Digits10 + 3;
   BOOST_STATIC_CONSTEXPR bool is_signed = true;
   BOOST_STATIC_CONSTEXPR bool is_integer = false;
   BOOST_STATIC_CONSTEXPR bool is_exact = false;
   BOOST_STATIC_CONSTEXPR int radix = 2;
   static number_type epsilon()
   {
      initializer.do_nothing();
      static std::pair<bool, number_type> value;
      if(!value.first)
      {
         value.first = true;
         value.second = 1;
         mpfi_div_2exp(value.second.backend().data(), value.second.backend().data(), std::numeric_limits<number_type>::digits - 1);
      }
      return value.second;
   }
   // What value should this be????
   static number_type round_error()
   {
      // returns epsilon/2
      initializer.do_nothing();
      static std::pair<bool, number_type> value;
      if(!value.first)
      {
         value.first = true;
         value.second = 1;
         mpfi_div_2exp(value.second.backend().data(), value.second.backend().data(), 1);
      }
      return value.second;
   }
   BOOST_STATIC_CONSTEXPR long min_exponent = MPFR_EMIN_DEFAULT;
   BOOST_STATIC_CONSTEXPR long min_exponent10 = (MPFR_EMIN_DEFAULT / 1000) * 301L;
   BOOST_STATIC_CONSTEXPR long max_exponent = MPFR_EMAX_DEFAULT;
   BOOST_STATIC_CONSTEXPR long max_exponent10 = (MPFR_EMAX_DEFAULT / 1000) * 301L;
   BOOST_STATIC_CONSTEXPR bool has_infinity = true;
   BOOST_STATIC_CONSTEXPR bool has_quiet_NaN = true;
   BOOST_STATIC_CONSTEXPR bool has_signaling_NaN = false;
   BOOST_STATIC_CONSTEXPR float_denorm_style has_denorm = denorm_absent;
   BOOST_STATIC_CONSTEXPR bool has_denorm_loss = false;
   static number_type infinity()
   {
      initializer.do_nothing();
      static std::pair<bool, number_type> value;
      if(!value.first)
      {
         boost::multiprecision::mpfr_float_backend<Digits10> t;
         mpfr_set_inf(t.data(), 1);
         value.first = true;
         mpfi_set_fr(value.second.backend().data(), t.data());
      }
      return value.second;
   }
   static number_type quiet_NaN()
   {
      initializer.do_nothing();
      static std::pair<bool, number_type> value;
      if(!value.first)
      {
         boost::multiprecision::mpfr_float_backend<Digits10> t;
         mpfr_set_nan(t.data());
         value.first = true;
         mpfi_set_fr(value.second.backend().data(), t.data());
      }
      return value.second;
   }
   BOOST_STATIC_CONSTEXPR number_type signaling_NaN()
   {
      return number_type(0);
   }
   BOOST_STATIC_CONSTEXPR number_type denorm_min() { return number_type(0); }
   BOOST_STATIC_CONSTEXPR bool is_iec559 = false;
   BOOST_STATIC_CONSTEXPR bool is_bounded = true;
   BOOST_STATIC_CONSTEXPR bool is_modulo = false;
   BOOST_STATIC_CONSTEXPR bool traps = true;
   BOOST_STATIC_CONSTEXPR bool tinyness_before = false;
   BOOST_STATIC_CONSTEXPR float_round_style round_style = round_to_nearest;

private:
   struct data_initializer
   {
      data_initializer()
      {
         std::numeric_limits<boost::multiprecision::number<boost::multiprecision::mpfi_float_backend<digits10> > >::epsilon();
         std::numeric_limits<boost::multiprecision::number<boost::multiprecision::mpfi_float_backend<digits10> > >::round_error();
         (std::numeric_limits<boost::multiprecision::number<boost::multiprecision::mpfi_float_backend<digits10> > >::min)();
         (std::numeric_limits<boost::multiprecision::number<boost::multiprecision::mpfi_float_backend<digits10> > >::max)();
         std::numeric_limits<boost::multiprecision::number<boost::multiprecision::mpfi_float_backend<digits10> > >::infinity();
         std::numeric_limits<boost::multiprecision::number<boost::multiprecision::mpfi_float_backend<digits10> > >::quiet_NaN();
      }
      void do_nothing()const{}
   };
   static const data_initializer initializer;
};

template<unsigned Digits10, boost::multiprecision::expression_template_option ExpressionTemplates>
const typename numeric_limits<boost::multiprecision::number<boost::multiprecision::mpfi_float_backend<Digits10>, ExpressionTemplates> >::data_initializer numeric_limits<boost::multiprecision::number<boost::multiprecision::mpfi_float_backend<Digits10>, ExpressionTemplates> >::initializer;

#ifndef BOOST_NO_INCLASS_MEMBER_INITIALIZATION

template <unsigned Digits10, boost::multiprecision::expression_template_option ExpressionTemplates>
BOOST_CONSTEXPR_OR_CONST int numeric_limits<boost::multiprecision::number<boost::multiprecision::mpfi_float_backend<Digits10>, ExpressionTemplates> >::digits;
template <unsigned Digits10, boost::multiprecision::expression_template_option ExpressionTemplates>
BOOST_CONSTEXPR_OR_CONST int numeric_limits<boost::multiprecision::number<boost::multiprecision::mpfi_float_backend<Digits10>, ExpressionTemplates> >::digits10;
template <unsigned Digits10, boost::multiprecision::expression_template_option ExpressionTemplates>
BOOST_CONSTEXPR_OR_CONST int numeric_limits<boost::multiprecision::number<boost::multiprecision::mpfi_float_backend<Digits10>, ExpressionTemplates> >::max_digits10;
template <unsigned Digits10, boost::multiprecision::expression_template_option ExpressionTemplates>
BOOST_CONSTEXPR_OR_CONST bool numeric_limits<boost::multiprecision::number<boost::multiprecision::mpfi_float_backend<Digits10>, ExpressionTemplates> >::is_signed;
template <unsigned Digits10, boost::multiprecision::expression_template_option ExpressionTemplates>
BOOST_CONSTEXPR_OR_CONST bool numeric_limits<boost::multiprecision::number<boost::multiprecision::mpfi_float_backend<Digits10>, ExpressionTemplates> >::is_integer;
template <unsigned Digits10, boost::multiprecision::expression_template_option ExpressionTemplates>
BOOST_CONSTEXPR_OR_CONST bool numeric_limits<boost::multiprecision::number<boost::multiprecision::mpfi_float_backend<Digits10>, ExpressionTemplates> >::is_exact;
template <unsigned Digits10, boost::multiprecision::expression_template_option ExpressionTemplates>
BOOST_CONSTEXPR_OR_CONST int numeric_limits<boost::multiprecision::number<boost::multiprecision::mpfi_float_backend<Digits10>, ExpressionTemplates> >::radix;
template <unsigned Digits10, boost::multiprecision::expression_template_option ExpressionTemplates>
BOOST_CONSTEXPR_OR_CONST long numeric_limits<boost::multiprecision::number<boost::multiprecision::mpfi_float_backend<Digits10>, ExpressionTemplates> >::min_exponent;
template <unsigned Digits10, boost::multiprecision::expression_template_option ExpressionTemplates>
BOOST_CONSTEXPR_OR_CONST long numeric_limits<boost::multiprecision::number<boost::multiprecision::mpfi_float_backend<Digits10>, ExpressionTemplates> >::min_exponent10;
template <unsigned Digits10, boost::multiprecision::expression_template_option ExpressionTemplates>
BOOST_CONSTEXPR_OR_CONST long numeric_limits<boost::multiprecision::number<boost::multiprecision::mpfi_float_backend<Digits10>, ExpressionTemplates> >::max_exponent;
template <unsigned Digits10, boost::multiprecision::expression_template_option ExpressionTemplates>
BOOST_CONSTEXPR_OR_CONST long numeric_limits<boost::multiprecision::number<boost::multiprecision::mpfi_float_backend<Digits10>, ExpressionTemplates> >::max_exponent10;
template <unsigned Digits10, boost::multiprecision::expression_template_option ExpressionTemplates>
BOOST_CONSTEXPR_OR_CONST bool numeric_limits<boost::multiprecision::number<boost::multiprecision::mpfi_float_backend<Digits10>, ExpressionTemplates> >::has_infinity;
template <unsigned Digits10, boost::multiprecision::expression_template_option ExpressionTemplates>
BOOST_CONSTEXPR_OR_CONST bool numeric_limits<boost::multiprecision::number<boost::multiprecision::mpfi_float_backend<Digits10>, ExpressionTemplates> >::has_quiet_NaN;
template <unsigned Digits10, boost::multiprecision::expression_template_option ExpressionTemplates>
BOOST_CONSTEXPR_OR_CONST bool numeric_limits<boost::multiprecision::number<boost::multiprecision::mpfi_float_backend<Digits10>, ExpressionTemplates> >::has_signaling_NaN;
template <unsigned Digits10, boost::multiprecision::expression_template_option ExpressionTemplates>
BOOST_CONSTEXPR_OR_CONST float_denorm_style numeric_limits<boost::multiprecision::number<boost::multiprecision::mpfi_float_backend<Digits10>, ExpressionTemplates> >::has_denorm;
template <unsigned Digits10, boost::multiprecision::expression_template_option ExpressionTemplates>
BOOST_CONSTEXPR_OR_CONST bool numeric_limits<boost::multiprecision::number<boost::multiprecision::mpfi_float_backend<Digits10>, ExpressionTemplates> >::has_denorm_loss;
template <unsigned Digits10, boost::multiprecision::expression_template_option ExpressionTemplates>
BOOST_CONSTEXPR_OR_CONST bool numeric_limits<boost::multiprecision::number<boost::multiprecision::mpfi_float_backend<Digits10>, ExpressionTemplates> >::is_iec559;
template <unsigned Digits10, boost::multiprecision::expression_template_option ExpressionTemplates>
BOOST_CONSTEXPR_OR_CONST bool numeric_limits<boost::multiprecision::number<boost::multiprecision::mpfi_float_backend<Digits10>, ExpressionTemplates> >::is_bounded;
template <unsigned Digits10, boost::multiprecision::expression_template_option ExpressionTemplates>
BOOST_CONSTEXPR_OR_CONST bool numeric_limits<boost::multiprecision::number<boost::multiprecision::mpfi_float_backend<Digits10>, ExpressionTemplates> >::is_modulo;
template <unsigned Digits10, boost::multiprecision::expression_template_option ExpressionTemplates>
BOOST_CONSTEXPR_OR_CONST bool numeric_limits<boost::multiprecision::number<boost::multiprecision::mpfi_float_backend<Digits10>, ExpressionTemplates> >::traps;
template <unsigned Digits10, boost::multiprecision::expression_template_option ExpressionTemplates>
BOOST_CONSTEXPR_OR_CONST bool numeric_limits<boost::multiprecision::number<boost::multiprecision::mpfi_float_backend<Digits10>, ExpressionTemplates> >::tinyness_before;
template <unsigned Digits10, boost::multiprecision::expression_template_option ExpressionTemplates>
BOOST_CONSTEXPR_OR_CONST float_round_style numeric_limits<boost::multiprecision::number<boost::multiprecision::mpfi_float_backend<Digits10>, ExpressionTemplates> >::round_style;

#endif


template<boost::multiprecision::expression_template_option ExpressionTemplates>
class numeric_limits<boost::multiprecision::number<boost::multiprecision::mpfi_float_backend<0>, ExpressionTemplates> >
{
   typedef boost::multiprecision::number<boost::multiprecision::mpfi_float_backend<0>, ExpressionTemplates> number_type;
public:
   BOOST_STATIC_CONSTEXPR bool is_specialized = false;
   static number_type (min)() { return number_type(0); }
   static number_type (max)() { return number_type(0); }
   static number_type lowest() { return number_type(0); }
   BOOST_STATIC_CONSTEXPR int digits = 0;
   BOOST_STATIC_CONSTEXPR int digits10 = 0;
   BOOST_STATIC_CONSTEXPR int max_digits10 = 0;
   BOOST_STATIC_CONSTEXPR bool is_signed = false;
   BOOST_STATIC_CONSTEXPR bool is_integer = false;
   BOOST_STATIC_CONSTEXPR bool is_exact = false;
   BOOST_STATIC_CONSTEXPR int radix = 0;
   static number_type epsilon() { return number_type(0); }
   static number_type round_error() { return number_type(0); }
   BOOST_STATIC_CONSTEXPR int min_exponent = 0;
   BOOST_STATIC_CONSTEXPR int min_exponent10 = 0;
   BOOST_STATIC_CONSTEXPR int max_exponent = 0;
   BOOST_STATIC_CONSTEXPR int max_exponent10 = 0;
   BOOST_STATIC_CONSTEXPR bool has_infinity = false;
   BOOST_STATIC_CONSTEXPR bool has_quiet_NaN = false;
   BOOST_STATIC_CONSTEXPR bool has_signaling_NaN = false;
   BOOST_STATIC_CONSTEXPR float_denorm_style has_denorm = denorm_absent;
   BOOST_STATIC_CONSTEXPR bool has_denorm_loss = false;
   static number_type infinity() { return number_type(0); }
   static number_type quiet_NaN() { return number_type(0); }
   static number_type signaling_NaN() { return number_type(0); }
   static number_type denorm_min() { return number_type(0); }
   BOOST_STATIC_CONSTEXPR bool is_iec559 = false;
   BOOST_STATIC_CONSTEXPR bool is_bounded = false;
   BOOST_STATIC_CONSTEXPR bool is_modulo = false;
   BOOST_STATIC_CONSTEXPR bool traps = false;
   BOOST_STATIC_CONSTEXPR bool tinyness_before = false;
   BOOST_STATIC_CONSTEXPR float_round_style round_style = round_toward_zero;
};

#ifndef BOOST_NO_INCLASS_MEMBER_INITIALIZATION

template <boost::multiprecision::expression_template_option ExpressionTemplates>
BOOST_CONSTEXPR_OR_CONST int numeric_limits<boost::multiprecision::number<boost::multiprecision::mpfi_float_backend<0>, ExpressionTemplates> >::digits;
template <boost::multiprecision::expression_template_option ExpressionTemplates>
BOOST_CONSTEXPR_OR_CONST int numeric_limits<boost::multiprecision::number<boost::multiprecision::mpfi_float_backend<0>, ExpressionTemplates> >::digits10;
template <boost::multiprecision::expression_template_option ExpressionTemplates>
BOOST_CONSTEXPR_OR_CONST int numeric_limits<boost::multiprecision::number<boost::multiprecision::mpfi_float_backend<0>, ExpressionTemplates> >::max_digits10;
template <boost::multiprecision::expression_template_option ExpressionTemplates>
BOOST_CONSTEXPR_OR_CONST bool numeric_limits<boost::multiprecision::number<boost::multiprecision::mpfi_float_backend<0>, ExpressionTemplates> >::is_signed;
template <boost::multiprecision::expression_template_option ExpressionTemplates>
BOOST_CONSTEXPR_OR_CONST bool numeric_limits<boost::multiprecision::number<boost::multiprecision::mpfi_float_backend<0>, ExpressionTemplates> >::is_integer;
template <boost::multiprecision::expression_template_option ExpressionTemplates>
BOOST_CONSTEXPR_OR_CONST bool numeric_limits<boost::multiprecision::number<boost::multiprecision::mpfi_float_backend<0>, ExpressionTemplates> >::is_exact;
template <boost::multiprecision::expression_template_option ExpressionTemplates>
BOOST_CONSTEXPR_OR_CONST int numeric_limits<boost::multiprecision::number<boost::multiprecision::mpfi_float_backend<0>, ExpressionTemplates> >::radix;
template <boost::multiprecision::expression_template_option ExpressionTemplates>
BOOST_CONSTEXPR_OR_CONST int numeric_limits<boost::multiprecision::number<boost::multiprecision::mpfi_float_backend<0>, ExpressionTemplates> >::min_exponent;
template <boost::multiprecision::expression_template_option ExpressionTemplates>
BOOST_CONSTEXPR_OR_CONST int numeric_limits<boost::multiprecision::number<boost::multiprecision::mpfi_float_backend<0>, ExpressionTemplates> >::min_exponent10;
template <boost::multiprecision::expression_template_option ExpressionTemplates>
BOOST_CONSTEXPR_OR_CONST int numeric_limits<boost::multiprecision::number<boost::multiprecision::mpfi_float_backend<0>, ExpressionTemplates> >::max_exponent;
template <boost::multiprecision::expression_template_option ExpressionTemplates>
BOOST_CONSTEXPR_OR_CONST int numeric_limits<boost::multiprecision::number<boost::multiprecision::mpfi_float_backend<0>, ExpressionTemplates> >::max_exponent10;
template <boost::multiprecision::expression_template_option ExpressionTemplates>
BOOST_CONSTEXPR_OR_CONST bool numeric_limits<boost::multiprecision::number<boost::multiprecision::mpfi_float_backend<0>, ExpressionTemplates> >::has_infinity;
template <boost::multiprecision::expression_template_option ExpressionTemplates>
BOOST_CONSTEXPR_OR_CONST bool numeric_limits<boost::multiprecision::number<boost::multiprecision::mpfi_float_backend<0>, ExpressionTemplates> >::has_quiet_NaN;
template <boost::multiprecision::expression_template_option ExpressionTemplates>
BOOST_CONSTEXPR_OR_CONST bool numeric_limits<boost::multiprecision::number<boost::multiprecision::mpfi_float_backend<0>, ExpressionTemplates> >::has_signaling_NaN;
template <boost::multiprecision::expression_template_option ExpressionTemplates>
BOOST_CONSTEXPR_OR_CONST float_denorm_style numeric_limits<boost::multiprecision::number<boost::multiprecision::mpfi_float_backend<0>, ExpressionTemplates> >::has_denorm;
template <boost::multiprecision::expression_template_option ExpressionTemplates>
BOOST_CONSTEXPR_OR_CONST bool numeric_limits<boost::multiprecision::number<boost::multiprecision::mpfi_float_backend<0>, ExpressionTemplates> >::has_denorm_loss;
template <boost::multiprecision::expression_template_option ExpressionTemplates>
BOOST_CONSTEXPR_OR_CONST bool numeric_limits<boost::multiprecision::number<boost::multiprecision::mpfi_float_backend<0>, ExpressionTemplates> >::is_iec559;
template <boost::multiprecision::expression_template_option ExpressionTemplates>
BOOST_CONSTEXPR_OR_CONST bool numeric_limits<boost::multiprecision::number<boost::multiprecision::mpfi_float_backend<0>, ExpressionTemplates> >::is_bounded;
template <boost::multiprecision::expression_template_option ExpressionTemplates>
BOOST_CONSTEXPR_OR_CONST bool numeric_limits<boost::multiprecision::number<boost::multiprecision::mpfi_float_backend<0>, ExpressionTemplates> >::is_modulo;
template <boost::multiprecision::expression_template_option ExpressionTemplates>
BOOST_CONSTEXPR_OR_CONST bool numeric_limits<boost::multiprecision::number<boost::multiprecision::mpfi_float_backend<0>, ExpressionTemplates> >::traps;
template <boost::multiprecision::expression_template_option ExpressionTemplates>
BOOST_CONSTEXPR_OR_CONST bool numeric_limits<boost::multiprecision::number<boost::multiprecision::mpfi_float_backend<0>, ExpressionTemplates> >::tinyness_before;
template <boost::multiprecision::expression_template_option ExpressionTemplates>
BOOST_CONSTEXPR_OR_CONST float_round_style numeric_limits<boost::multiprecision::number<boost::multiprecision::mpfi_float_backend<0>, ExpressionTemplates> >::round_style;

#endif
} // namespace std
#endif