1 files changed, 805 insertions, 0 deletions
diff --git a/src/third_party/boost-1.56.0/boost/math/policies/error_handling.hpp b/src/third_party/boost-1.56.0/boost/math/policies/error_handling.hpp
new file mode 100644
index 00000000000..674759006eb
--- /dev/null
+++ b/src/third_party/boost-1.56.0/boost/math/policies/error_handling.hpp
@@ -0,0 +1,805 @@
+//  Copyright John Maddock 2007.
+//  Copyright Paul A. Bristow 2007.
+
+//  Use, modification and distribution are subject to 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_POLICY_ERROR_HANDLING_HPP
+#define BOOST_MATH_POLICY_ERROR_HANDLING_HPP
+
+#include <stdexcept>
+#include <iomanip>
+#include <string>
+#include <cerrno>
+#include <boost/config/no_tr1/complex.hpp>
+#include <boost/config/no_tr1/cmath.hpp>
+#include <stdexcept>
+#include <boost/math/tools/config.hpp>
+#include <boost/math/policies/policy.hpp>
+#include <boost/math/tools/precision.hpp>
+#include <boost/cstdint.hpp>
+#ifdef BOOST_MSVC
+#  pragma warning(push) // Quiet warnings in boost/format.hpp
+#  pragma warning(disable: 4996) // _SCL_SECURE_NO_DEPRECATE
+#  pragma warning(disable: 4512) // assignment operator could not be generated.
+// And warnings in error handling:
+#  pragma warning(disable: 4702) // unreachable code.
+// Note that this only occurs when the compiler can deduce code is unreachable,
+// for example when policy macros are used to ignore errors rather than throw.
+#endif
+#include <boost/format.hpp>
+
+namespace boost{ namespace math{
+
+class evaluation_error : public std::runtime_error
+{
+public:
+   evaluation_error(const std::string& s) : std::runtime_error(s){}
+};
+
+class rounding_error : public std::runtime_error
+{
+public:
+   rounding_error(const std::string& s) : std::runtime_error(s){}
+};
+
+namespace policies{
+//
+// Forward declarations of user error handlers,
+// it's up to the user to provide the definition of these:
+//
+template <class T>
+T user_domain_error(const char* function, const char* message, const T& val);
+template <class T>
+T user_pole_error(const char* function, const char* message, const T& val);
+template <class T>
+T user_overflow_error(const char* function, const char* message, const T& val);
+template <class T>
+T user_underflow_error(const char* function, const char* message, const T& val);
+template <class T>
+T user_denorm_error(const char* function, const char* message, const T& val);
+template <class T>
+T user_evaluation_error(const char* function, const char* message, const T& val);
+template <class T, class TargetType>
+T user_rounding_error(const char* function, const char* message, const T& val, const TargetType& t);
+template <class T>
+T user_indeterminate_result_error(const char* function, const char* message, const T& val);
+
+namespace detail
+{
+//
+// Helper function to avoid binding rvalue to non-const-reference,
+// in other words a warning suppression mechanism:
+//
+template <class Formatter, class Group>
+inline std::string do_format(Formatter f, const Group& g)
+{
+   return (f % g).str();
+}
+
+template <class T>
+inline const char* name_of()
+{
+#ifndef BOOST_NO_RTTI
+   return typeid(T).name();
+#else
+   return "unknown";
+#endif
+}
+template <> inline const char* name_of<float>(){ return "float"; }
+template <> inline const char* name_of<double>(){ return "double"; }
+template <> inline const char* name_of<long double>(){ return "long double"; }
+
+#ifdef BOOST_MATH_USE_FLOAT128
+template <>
+inline const char* name_of<BOOST_MATH_FLOAT128_TYPE>()
+{
+   return "__float128";
+}
+#endif
+
+template <class E, class T>
+void raise_error(const char* function, const char* message)
+{
+  if(function == 0)
+       function = "Unknown function operating on type %1%";
+  if(message == 0)
+       message = "Cause unknown";
+
+  std::string msg("Error in function ");
+#ifndef BOOST_NO_RTTI
+  msg += (boost::format(function) % boost::math::policies::detail::name_of<T>()).str();
+#else
+  msg += function;
+#endif
+  msg += ": ";
+  msg += message;
+
+  E e(msg);
+  boost::throw_exception(e);
+}
+
+template <class E, class T>
+void raise_error(const char* function, const char* message, const T& val)
+{
+  if(function == 0)
+     function = "Unknown function operating on type %1%";
+  if(message == 0)
+     message = "Cause unknown: error caused by bad argument with value %1%";
+
+  std::string msg("Error in function ");
+#ifndef BOOST_NO_RTTI
+  msg += (boost::format(function) % boost::math::policies::detail::name_of<T>()).str();
+#else
+  msg += function;
+#endif
+  msg += ": ";
+  msg += message;
+
+  int prec = 2 + (boost::math::policies::digits<T, boost::math::policies::policy<> >() * 30103UL) / 100000UL;
+  msg = do_format(boost::format(msg), boost::io::group(std::setprecision(prec), val));
+
+  E e(msg);
+  boost::throw_exception(e);
+}
+
+template <class T>
+inline T raise_domain_error(
+           const char* function,
+           const char* message,
+           const T& val,
+           const ::boost::math::policies::domain_error< ::boost::math::policies::throw_on_error>&)
+{
+   raise_error<std::domain_error, T>(function, message, val);
+   // we never get here:
+   return std::numeric_limits<T>::quiet_NaN();
+}
+
+template <class T>
+inline T raise_domain_error(
+           const char* ,
+           const char* ,
+           const T& ,
+           const ::boost::math::policies::domain_error< ::boost::math::policies::ignore_error>&)
+{
+   // This may or may not do the right thing, but the user asked for the error
+   // to be ignored so here we go anyway:
+   return std::numeric_limits<T>::quiet_NaN();
+}
+
+template <class T>
+inline T raise_domain_error(
+           const char* ,
+           const char* ,
+           const T& ,
+           const ::boost::math::policies::domain_error< ::boost::math::policies::errno_on_error>&)
+{
+   errno = EDOM;
+   // This may or may not do the right thing, but the user asked for the error
+   // to be silent so here we go anyway:
+   return std::numeric_limits<T>::quiet_NaN();
+}
+
+template <class T>
+inline T raise_domain_error(
+           const char* function,
+           const char* message,
+           const T& val,
+           const  ::boost::math::policies::domain_error< ::boost::math::policies::user_error>&)
+{
+   return user_domain_error(function, message, val);
+}
+
+template <class T>
+inline T raise_pole_error(
+           const char* function,
+           const char* message,
+           const T& val,
+           const  ::boost::math::policies::pole_error< ::boost::math::policies::throw_on_error>&)
+{
+   return boost::math::policies::detail::raise_domain_error(function, message, val,  ::boost::math::policies::domain_error< ::boost::math::policies::throw_on_error>());
+}
+
+template <class T>
+inline T raise_pole_error(
+           const char* function,
+           const char* message,
+           const T& val,
+           const  ::boost::math::policies::pole_error< ::boost::math::policies::ignore_error>&)
+{
+   return  ::boost::math::policies::detail::raise_domain_error(function, message, val,  ::boost::math::policies::domain_error< ::boost::math::policies::ignore_error>());
+}
+
+template <class T>
+inline T raise_pole_error(
+           const char* function,
+           const char* message,
+           const T& val,
+           const  ::boost::math::policies::pole_error< ::boost::math::policies::errno_on_error>&)
+{
+   return  ::boost::math::policies::detail::raise_domain_error(function, message, val,  ::boost::math::policies::domain_error< ::boost::math::policies::errno_on_error>());
+}
+
+template <class T>
+inline T raise_pole_error(
+           const char* function,
+           const char* message,
+           const T& val,
+           const  ::boost::math::policies::pole_error< ::boost::math::policies::user_error>&)
+{
+   return user_pole_error(function, message, val);
+}
+
+
+template <class T>
+inline T raise_overflow_error(
+           const char* function,
+           const char* message,
+           const  ::boost::math::policies::overflow_error< ::boost::math::policies::throw_on_error>&)
+{
+   raise_error<std::overflow_error, T>(function, message ? message : "numeric overflow");
+   // We should never get here:
+   return std::numeric_limits<T>::has_infinity ? std::numeric_limits<T>::infinity() : boost::math::tools::max_value<T>();
+}
+
+template <class T>
+inline T raise_overflow_error(
+           const char* function,
+           const char* message,
+           const T& val,
+           const ::boost::math::policies::overflow_error< ::boost::math::policies::throw_on_error>&)
+{
+   raise_error<std::overflow_error, T>(function, message ? message : "numeric overflow", val);
+   // We should never get here:
+   return std::numeric_limits<T>::has_infinity ? std::numeric_limits<T>::infinity() : boost::math::tools::max_value<T>();
+}
+
+template <class T>
+inline T raise_overflow_error(
+           const char* ,
+           const char* ,
+           const  ::boost::math::policies::overflow_error< ::boost::math::policies::ignore_error>&)
+{
+   // This may or may not do the right thing, but the user asked for the error
+   // to be ignored so here we go anyway:
+   return std::numeric_limits<T>::has_infinity ? std::numeric_limits<T>::infinity() : boost::math::tools::max_value<T>();
+}
+
+template <class T>
+inline T raise_overflow_error(
+           const char* ,
+           const char* ,
+           const T&,
+           const  ::boost::math::policies::overflow_error< ::boost::math::policies::ignore_error>&)
+{
+   // This may or may not do the right thing, but the user asked for the error
+   // to be ignored so here we go anyway:
+   return std::numeric_limits<T>::has_infinity ? std::numeric_limits<T>::infinity() : boost::math::tools::max_value<T>();
+}
+
+template <class T>
+inline T raise_overflow_error(
+           const char* ,
+           const char* ,
+           const  ::boost::math::policies::overflow_error< ::boost::math::policies::errno_on_error>&)
+{
+   errno = ERANGE;
+   // This may or may not do the right thing, but the user asked for the error
+   // to be silent so here we go anyway:
+   return std::numeric_limits<T>::has_infinity ? std::numeric_limits<T>::infinity() : boost::math::tools::max_value<T>();
+}
+
+template <class T>
+inline T raise_overflow_error(
+           const char* ,
+           const char* ,
+           const T&,
+           const  ::boost::math::policies::overflow_error< ::boost::math::policies::errno_on_error>&)
+{
+   errno = ERANGE;
+   // This may or may not do the right thing, but the user asked for the error
+   // to be silent so here we go anyway:
+   return std::numeric_limits<T>::has_infinity ? std::numeric_limits<T>::infinity() : boost::math::tools::max_value<T>();
+}
+
+template <class T>
+inline T raise_overflow_error(
+           const char* function,
+           const char* message,
+           const  ::boost::math::policies::overflow_error< ::boost::math::policies::user_error>&)
+{
+   return user_overflow_error(function, message, std::numeric_limits<T>::infinity());
+}
+
+template <class T>
+inline T raise_overflow_error(
+           const char* function,
+           const char* message,
+           const T& val,
+           const  ::boost::math::policies::overflow_error< ::boost::math::policies::user_error>&)
+{
+   std::string fmsg("Error in function ");
+#ifndef BOOST_NO_RTTI
+   fmsg += (boost::format(function) % boost::math::policies::detail::name_of<T>()).str();
+#else
+   fmsg += function;
+#endif
+   int prec = 2 + (boost::math::policies::digits<T, boost::math::policies::policy<> >() * 30103UL) / 100000UL;
+   std::string msg = do_format(boost::format(message), boost::io::group(std::setprecision(prec), val));
+   return user_overflow_error(fmsg.c_str(), msg.c_str(), std::numeric_limits<T>::infinity());
+}
+
+template <class T>
+inline T raise_underflow_error(
+           const char* function,
+           const char* message,
+           const  ::boost::math::policies::underflow_error< ::boost::math::policies::throw_on_error>&)
+{
+   raise_error<std::underflow_error, T>(function, message ? message : "numeric underflow");
+   // We should never get here:
+   return 0;
+}
+
+template <class T>
+inline T raise_underflow_error(
+           const char* ,
+           const char* ,
+           const  ::boost::math::policies::underflow_error< ::boost::math::policies::ignore_error>&)
+{
+   // This may or may not do the right thing, but the user asked for the error
+   // to be ignored so here we go anyway:
+   return T(0);
+}
+
+template <class T>
+inline T raise_underflow_error(
+           const char* /* function */,
+           const char* /* message */,
+           const  ::boost::math::policies::underflow_error< ::boost::math::policies::errno_on_error>&)
+{
+   errno = ERANGE;
+   // This may or may not do the right thing, but the user asked for the error
+   // to be silent so here we go anyway:
+   return T(0);
+}
+
+template <class T>
+inline T raise_underflow_error(
+           const char* function,
+           const char* message,
+           const  ::boost::math::policies::underflow_error< ::boost::math::policies::user_error>&)
+{
+   return user_underflow_error(function, message, T(0));
+}
+
+template <class T>
+inline T raise_denorm_error(
+           const char* function,
+           const char* message,
+           const T& /* val */,
+           const  ::boost::math::policies::denorm_error< ::boost::math::policies::throw_on_error>&)
+{
+   raise_error<std::underflow_error, T>(function, message ? message : "denormalised result");
+   // we never get here:
+   return T(0);
+}
+
+template <class T>
+inline T raise_denorm_error(
+           const char* ,
+           const char* ,
+           const T&  val,
+           const  ::boost::math::policies::denorm_error< ::boost::math::policies::ignore_error>&)
+{
+   // This may or may not do the right thing, but the user asked for the error
+   // to be ignored so here we go anyway:
+   return val;
+}
+
+template <class T>
+inline T raise_denorm_error(
+           const char* ,
+           const char* ,
+           const T& val,
+           const  ::boost::math::policies::denorm_error< ::boost::math::policies::errno_on_error>&)
+{
+   errno = ERANGE;
+   // This may or may not do the right thing, but the user asked for the error
+   // to be silent so here we go anyway:
+   return val;
+}
+
+template <class T>
+inline T raise_denorm_error(
+           const char* function,
+           const char* message,
+           const T& val,
+           const  ::boost::math::policies::denorm_error< ::boost::math::policies::user_error>&)
+{
+   return user_denorm_error(function, message, val);
+}
+
+template <class T>
+inline T raise_evaluation_error(
+           const char* function,
+           const char* message,
+           const T& val,
+           const  ::boost::math::policies::evaluation_error< ::boost::math::policies::throw_on_error>&)
+{
+   raise_error<boost::math::evaluation_error, T>(function, message, val);
+   // we never get here:
+   return T(0);
+}
+
+template <class T>
+inline T raise_evaluation_error(
+           const char* ,
+           const char* ,
+           const T& val,
+           const  ::boost::math::policies::evaluation_error< ::boost::math::policies::ignore_error>&)
+{
+   // This may or may not do the right thing, but the user asked for the error
+   // to be ignored so here we go anyway:
+   return val;
+}
+
+template <class T>
+inline T raise_evaluation_error(
+           const char* ,
+           const char* ,
+           const T& val,
+           const  ::boost::math::policies::evaluation_error< ::boost::math::policies::errno_on_error>&)
+{
+   errno = EDOM;
+   // This may or may not do the right thing, but the user asked for the error
+   // to be silent so here we go anyway:
+   return val;
+}
+
+template <class T>
+inline T raise_evaluation_error(
+           const char* function,
+           const char* message,
+           const T& val,
+           const  ::boost::math::policies::evaluation_error< ::boost::math::policies::user_error>&)
+{
+   return user_evaluation_error(function, message, val);
+}
+
+template <class T, class TargetType>
+inline TargetType raise_rounding_error(
+           const char* function,
+           const char* message,
+           const T& val,
+           const TargetType&,
+           const  ::boost::math::policies::rounding_error< ::boost::math::policies::throw_on_error>&)
+{
+   raise_error<boost::math::rounding_error, T>(function, message, val);
+   // we never get here:
+   return TargetType(0);
+}
+
+template <class T, class TargetType>
+inline TargetType raise_rounding_error(
+           const char* ,
+           const char* ,
+           const T& val,
+           const TargetType&,
+           const  ::boost::math::policies::rounding_error< ::boost::math::policies::ignore_error>&)
+{
+   // This may or may not do the right thing, but the user asked for the error
+   // to be ignored so here we go anyway:
+   BOOST_STATIC_ASSERT(std::numeric_limits<TargetType>::is_specialized);
+   return  val > 0 ? (std::numeric_limits<TargetType>::max)() : (std::numeric_limits<TargetType>::is_integer ? (std::numeric_limits<TargetType>::min)() : -(std::numeric_limits<TargetType>::max)());
+}
+
+template <class T, class TargetType>
+inline TargetType raise_rounding_error(
+           const char* ,
+           const char* ,
+           const T& val,
+           const TargetType&,
+           const  ::boost::math::policies::rounding_error< ::boost::math::policies::errno_on_error>&)
+{
+   errno = ERANGE;
+   // This may or may not do the right thing, but the user asked for the error
+   // to be silent so here we go anyway:
+   BOOST_STATIC_ASSERT(std::numeric_limits<TargetType>::is_specialized);
+   return  val > 0 ? (std::numeric_limits<TargetType>::max)() : (std::numeric_limits<TargetType>::is_integer ? (std::numeric_limits<TargetType>::min)() : -(std::numeric_limits<TargetType>::max)());
+}
+
+template <class T, class TargetType>
+inline TargetType raise_rounding_error(
+           const char* function,
+           const char* message,
+           const T& val,
+           const TargetType& t,
+           const  ::boost::math::policies::rounding_error< ::boost::math::policies::user_error>&)
+{
+   return user_rounding_error(function, message, val, t);
+}
+
+template <class T, class R>
+inline T raise_indeterminate_result_error(
+           const char* function,
+           const char* message,
+           const T& val,
+           const R& ,
+           const ::boost::math::policies::indeterminate_result_error< ::boost::math::policies::throw_on_error>&)
+{
+   raise_error<std::domain_error, T>(function, message, val);
+   // we never get here:
+   return std::numeric_limits<T>::quiet_NaN();
+}
+
+template <class T, class R>
+inline T raise_indeterminate_result_error(
+           const char* ,
+           const char* ,
+           const T& ,
+           const R& result,
+           const ::boost::math::policies::indeterminate_result_error< ::boost::math::policies::ignore_error>&)
+{
+   // This may or may not do the right thing, but the user asked for the error
+   // to be ignored so here we go anyway:
+   return result;
+}
+
+template <class T, class R>
+inline T raise_indeterminate_result_error(
+           const char* ,
+           const char* ,
+           const T& ,
+           const R& result,
+           const ::boost::math::policies::indeterminate_result_error< ::boost::math::policies::errno_on_error>&)
+{
+   errno = EDOM;
+   // This may or may not do the right thing, but the user asked for the error
+   // to be silent so here we go anyway:
+   return result;
+}
+
+template <class T, class R>
+inline T raise_indeterminate_result_error(
+           const char* function,
+           const char* message,
+           const T& val,
+           const R& ,
+           const ::boost::math::policies::indeterminate_result_error< ::boost::math::policies::user_error>&)
+{
+   return user_indeterminate_result_error(function, message, val);
+}
+
+}  // namespace detail
+
+template <class T, class Policy>
+inline T raise_domain_error(const char* function, const char* message, const T& val, const Policy&)
+{
+   typedef typename Policy::domain_error_type policy_type;
+   return detail::raise_domain_error(
+      function, message ? message : "Domain Error evaluating function at %1%",
+      val, policy_type());
+}
+
+template <class T, class Policy>
+inline T raise_pole_error(const char* function, const char* message, const T& val, const Policy&)
+{
+   typedef typename Policy::pole_error_type policy_type;
+   return detail::raise_pole_error(
+      function, message ? message : "Evaluation of function at pole %1%",
+      val, policy_type());
+}
+
+template <class T, class Policy>
+inline T raise_overflow_error(const char* function, const char* message, const Policy&)
+{
+   typedef typename Policy::overflow_error_type policy_type;
+   return detail::raise_overflow_error<T>(
+      function, message ? message : "Overflow Error",
+      policy_type());
+}
+
+template <class T, class Policy>
+inline T raise_overflow_error(const char* function, const char* message, const T& val, const Policy&)
+{
+   typedef typename Policy::overflow_error_type policy_type;
+   return detail::raise_overflow_error(
+      function, message ? message : "Overflow evaluating function at %1%",
+      val, policy_type());
+}
+
+template <class T, class Policy>
+inline T raise_underflow_error(const char* function, const char* message, const Policy&)
+{
+   typedef typename Policy::underflow_error_type policy_type;
+   return detail::raise_underflow_error<T>(
+      function, message ? message : "Underflow Error",
+      policy_type());
+}
+
+template <class T, class Policy>
+inline T raise_denorm_error(const char* function, const char* message, const T& val, const Policy&)
+{
+   typedef typename Policy::denorm_error_type policy_type;
+   return detail::raise_denorm_error<T>(
+      function, message ? message : "Denorm Error",
+      val,
+      policy_type());
+}
+
+template <class T, class Policy>
+inline T raise_evaluation_error(const char* function, const char* message, const T& val, const Policy&)
+{
+   typedef typename Policy::evaluation_error_type policy_type;
+   return detail::raise_evaluation_error(
+      function, message ? message : "Internal Evaluation Error, best value so far was %1%",
+      val, policy_type());
+}
+
+template <class T, class TargetType, class Policy>
+inline TargetType raise_rounding_error(const char* function, const char* message, const T& val, const TargetType& t, const Policy&)
+{
+   typedef typename Policy::rounding_error_type policy_type;
+   return detail::raise_rounding_error(
+      function, message ? message : "Value %1% can not be represented in the target integer type.",
+      val, t, policy_type());
+}
+
+template <class T, class R, class Policy>
+inline T raise_indeterminate_result_error(const char* function, const char* message, const T& val, const R& result, const Policy&)
+{
+   typedef typename Policy::indeterminate_result_error_type policy_type;
+   return detail::raise_indeterminate_result_error(
+      function, message ? message : "Indeterminate result with value %1%",
+      val, result, policy_type());
+}
+
+//
+// checked_narrowing_cast:
+//
+namespace detail
+{
+
+template <class R, class T, class Policy>
+inline bool check_overflow(T val, R* result, const char* function, const Policy& pol)
+{
+   BOOST_MATH_STD_USING
+   if(fabs(val) > tools::max_value<R>())
+   {
+      boost::math::policies::detail::raise_overflow_error<R>(function, 0, pol);
+      *result = static_cast<R>(val);
+      return true;
+   }
+   return false;
+}
+template <class R, class T, class Policy>
+inline bool check_overflow(std::complex<T> val, R* result, const char* function, const Policy& pol)
+{
+   typedef typename R::value_type r_type;
+   r_type re, im;
+   bool r = check_overflow<r_type>(val.real(), &re, function, pol);
+   r = check_overflow<r_type>(val.imag(), &im, function, pol) || r;
+   *result = R(re, im);
+   return r;
+}
+template <class R, class T, class Policy>
+inline bool check_underflow(T val, R* result, const char* function, const Policy& pol)
+{
+   if((val != 0) && (static_cast<R>(val) == 0))
+   {
+      *result = static_cast<R>(boost::math::policies::detail::raise_underflow_error<R>(function, 0, pol));
+      return true;
+   }
+   return false;
+}
+template <class R, class T, class Policy>
+inline bool check_underflow(std::complex<T> val, R* result, const char* function, const Policy& pol)
+{
+   typedef typename R::value_type r_type;
+   r_type re, im;
+   bool r = check_underflow<r_type>(val.real(), &re, function, pol);
+   r = check_underflow<r_type>(val.imag(), &im, function, pol) || r;
+   *result = R(re, im);
+   return r;
+}
+template <class R, class T, class Policy>
+inline bool check_denorm(T val, R* result, const char* function, const Policy& pol)
+{
+   BOOST_MATH_STD_USING
+   if((fabs(val) < static_cast<T>(tools::min_value<R>())) && (static_cast<R>(val) != 0))
+   {
+      *result = static_cast<R>(boost::math::policies::detail::raise_denorm_error<R>(function, 0, static_cast<R>(val), pol));
+      return true;
+   }
+   return false;
+}
+template <class R, class T, class Policy>
+inline bool check_denorm(std::complex<T> val, R* result, const char* function, const Policy& pol)
+{
+   typedef typename R::value_type r_type;
+   r_type re, im;
+   bool r = check_denorm<r_type>(val.real(), &re, function, pol);
+   r = check_denorm<r_type>(val.imag(), &im, function, pol) || r;
+   *result = R(re, im);
+   return r;
+}
+
+// Default instantiations with ignore_error policy.
+template <class R, class T>
+inline bool check_overflow(T /* val */, R* /* result */, const char* /* function */, const overflow_error<ignore_error>&){ return false; }
+template <class R, class T>
+inline bool check_overflow(std::complex<T> /* val */, R* /* result */, const char* /* function */, const overflow_error<ignore_error>&){ return false; }
+template <class R, class T>
+inline bool check_underflow(T /* val */, R* /* result */, const char* /* function */, const underflow_error<ignore_error>&){ return false; }
+template <class R, class T>
+inline bool check_underflow(std::complex<T> /* val */, R* /* result */, const char* /* function */, const underflow_error<ignore_error>&){ return false; }
+template <class R, class T>
+inline bool check_denorm(T /* val */, R* /* result*/, const char* /* function */, const denorm_error<ignore_error>&){ return false; }
+template <class R, class T>
+inline bool check_denorm(std::complex<T> /* val */, R* /* result*/, const char* /* function */, const denorm_error<ignore_error>&){ return false; }
+
+} // namespace detail
+
+template <class R, class Policy, class T>
+inline R checked_narrowing_cast(T val, const char* function)
+{
+   typedef typename Policy::overflow_error_type overflow_type;
+   typedef typename Policy::underflow_error_type underflow_type;
+   typedef typename Policy::denorm_error_type denorm_type;
+   //
+   // Most of what follows will evaluate to a no-op:
+   //
+   R result = 0;
+   if(detail::check_overflow<R>(val, &result, function, overflow_type()))
+      return result;
+   if(detail::check_underflow<R>(val, &result, function, underflow_type()))
+      return result;
+   if(detail::check_denorm<R>(val, &result, function, denorm_type()))
+      return result;
+
+   return static_cast<R>(val);
+}
+
+template <class T, class Policy>
+inline void check_series_iterations(const char* function, boost::uintmax_t max_iter, const Policy& pol)
+{
+   if(max_iter >= policies::get_max_series_iterations<Policy>())
+      raise_evaluation_error<T>(
+         function,
+         "Series evaluation exceeded %1% iterations, giving up now.", static_cast<T>(static_cast<double>(max_iter)), pol);
+}
+
+template <class T, class Policy>
+inline void check_root_iterations(const char* function, boost::uintmax_t max_iter, const Policy& pol)
+{
+   if(max_iter >= policies::get_max_root_iterations<Policy>())
+      raise_evaluation_error<T>(
+         function,
+         "Root finding evaluation exceeded %1% iterations, giving up now.", static_cast<T>(static_cast<double>(max_iter)), pol);
+}
+
+} //namespace policies
+
+namespace detail{
+
+//
+// Simple helper function to assist in returning a pair from a single value,
+// that value usually comes from one of the error handlers above:
+//
+template <class T>
+std::pair<T, T> pair_from_single(const T& val)
+{
+   return std::make_pair(val, val);
+}
+
+}
+
+#ifdef BOOST_MSVC
+#  pragma warning(pop)
+#endif
+
+}} // namespaces boost/math
+
+#endif // BOOST_MATH_POLICY_ERROR_HANDLING_HPP
+