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diff --git a/src/third_party/boost-1.56.0/boost/math/distributions/exponential.hpp b/src/third_party/boost-1.56.0/boost/math/distributions/exponential.hpp
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--- a/src/third_party/boost-1.56.0/boost/math/distributions/exponential.hpp
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@@ -1,275 +0,0 @@
-// Copyright John Maddock 2006.
-// 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_STATS_EXPONENTIAL_HPP
-#define BOOST_STATS_EXPONENTIAL_HPP
-
-#include <boost/math/distributions/fwd.hpp>
-#include <boost/math/constants/constants.hpp>
-#include <boost/math/special_functions/log1p.hpp>
-#include <boost/math/special_functions/expm1.hpp>
-#include <boost/math/distributions/complement.hpp>
-#include <boost/math/distributions/detail/common_error_handling.hpp>
-#include <boost/config/no_tr1/cmath.hpp>
-
-#ifdef BOOST_MSVC
-# pragma warning(push)
-# pragma warning(disable: 4127) // conditional expression is constant
-# pragma warning(disable: 4702) // unreachable code (return after domain_error throw).
-#endif
-
-#include <utility>
-
-namespace boost{ namespace math{
-
-namespace detail{
-//
-// Error check:
-//
-template <class RealType, class Policy>
-inline bool verify_lambda(const char* function, RealType l, RealType* presult, const Policy& pol)
-{
- if((l <= 0) || !(boost::math::isfinite)(l))
- {
- *presult = policies::raise_domain_error<RealType>(
- function,
- "The scale parameter \"lambda\" must be > 0, but was: %1%.", l, pol);
- return false;
- }
- return true;
-}
-
-template <class RealType, class Policy>
-inline bool verify_exp_x(const char* function, RealType x, RealType* presult, const Policy& pol)
-{
- if((x < 0) || (boost::math::isnan)(x))
- {
- *presult = policies::raise_domain_error<RealType>(
- function,
- "The random variable must be >= 0, but was: %1%.", x, pol);
- return false;
- }
- return true;
-}
-
-} // namespace detail
-
-template <class RealType = double, class Policy = policies::policy<> >
-class exponential_distribution
-{
-public:
- typedef RealType value_type;
- typedef Policy policy_type;
-
- exponential_distribution(RealType l_lambda = 1)
- : m_lambda(l_lambda)
- {
- RealType err;
- detail::verify_lambda("boost::math::exponential_distribution<%1%>::exponential_distribution", l_lambda, &err, Policy());
- } // exponential_distribution
-
- RealType lambda()const { return m_lambda; }
-
-private:
- RealType m_lambda;
-};
-
-typedef exponential_distribution<double> exponential;
-
-template <class RealType, class Policy>
-inline const std::pair<RealType, RealType> range(const exponential_distribution<RealType, Policy>& /*dist*/)
-{ // Range of permissible values for random variable x.
- if (std::numeric_limits<RealType>::has_infinity)
- {
- return std::pair<RealType, RealType>(static_cast<RealType>(0), std::numeric_limits<RealType>::infinity()); // 0 to + infinity.
- }
- else
- {
- using boost::math::tools::max_value;
- return std::pair<RealType, RealType>(static_cast<RealType>(0), max_value<RealType>()); // 0 to + max
- }
-}
-
-template <class RealType, class Policy>
-inline const std::pair<RealType, RealType> support(const exponential_distribution<RealType, Policy>& /*dist*/)
-{ // Range of supported values for random variable x.
- // This is range where cdf rises from 0 to 1, and outside it, the pdf is zero.
- using boost::math::tools::max_value;
- using boost::math::tools::min_value;
- return std::pair<RealType, RealType>(min_value<RealType>(), max_value<RealType>());
- // min_value<RealType>() to avoid a discontinuity at x = 0.
-}
-
-template <class RealType, class Policy>
-inline RealType pdf(const exponential_distribution<RealType, Policy>& dist, const RealType& x)
-{
- BOOST_MATH_STD_USING // for ADL of std functions
-
- static const char* function = "boost::math::pdf(const exponential_distribution<%1%>&, %1%)";
-
- RealType lambda = dist.lambda();
- RealType result = 0;
- if(0 == detail::verify_lambda(function, lambda, &result, Policy()))
- return result;
- if(0 == detail::verify_exp_x(function, x, &result, Policy()))
- return result;
- // Workaround for VC11/12 bug:
- if ((boost::math::isinf)(x))
- return 0;
- result = lambda * exp(-lambda * x);
- return result;
-} // pdf
-
-template <class RealType, class Policy>
-inline RealType cdf(const exponential_distribution<RealType, Policy>& dist, const RealType& x)
-{
- BOOST_MATH_STD_USING // for ADL of std functions
-
- static const char* function = "boost::math::cdf(const exponential_distribution<%1%>&, %1%)";
-
- RealType result = 0;
- RealType lambda = dist.lambda();
- if(0 == detail::verify_lambda(function, lambda, &result, Policy()))
- return result;
- if(0 == detail::verify_exp_x(function, x, &result, Policy()))
- return result;
- result = -boost::math::expm1(-x * lambda, Policy());
-
- return result;
-} // cdf
-
-template <class RealType, class Policy>
-inline RealType quantile(const exponential_distribution<RealType, Policy>& dist, const RealType& p)
-{
- BOOST_MATH_STD_USING // for ADL of std functions
-
- static const char* function = "boost::math::quantile(const exponential_distribution<%1%>&, %1%)";
-
- RealType result = 0;
- RealType lambda = dist.lambda();
- if(0 == detail::verify_lambda(function, lambda, &result, Policy()))
- return result;
- if(0 == detail::check_probability(function, p, &result, Policy()))
- return result;
-
- if(p == 0)
- return 0;
- if(p == 1)
- return policies::raise_overflow_error<RealType>(function, 0, Policy());
-
- result = -boost::math::log1p(-p, Policy()) / lambda;
- return result;
-} // quantile
-
-template <class RealType, class Policy>
-inline RealType cdf(const complemented2_type<exponential_distribution<RealType, Policy>, RealType>& c)
-{
- BOOST_MATH_STD_USING // for ADL of std functions
-
- static const char* function = "boost::math::cdf(const exponential_distribution<%1%>&, %1%)";
-
- RealType result = 0;
- RealType lambda = c.dist.lambda();
- if(0 == detail::verify_lambda(function, lambda, &result, Policy()))
- return result;
- if(0 == detail::verify_exp_x(function, c.param, &result, Policy()))
- return result;
- // Workaround for VC11/12 bug:
- if (c.param >= tools::max_value<RealType>())
- return 0;
- result = exp(-c.param * lambda);
-
- return result;
-}
-
-template <class RealType, class Policy>
-inline RealType quantile(const complemented2_type<exponential_distribution<RealType, Policy>, RealType>& c)
-{
- BOOST_MATH_STD_USING // for ADL of std functions
-
- static const char* function = "boost::math::quantile(const exponential_distribution<%1%>&, %1%)";
-
- RealType result = 0;
- RealType lambda = c.dist.lambda();
- if(0 == detail::verify_lambda(function, lambda, &result, Policy()))
- return result;
-
- RealType q = c.param;
- if(0 == detail::check_probability(function, q, &result, Policy()))
- return result;
-
- if(q == 1)
- return 0;
- if(q == 0)
- return policies::raise_overflow_error<RealType>(function, 0, Policy());
-
- result = -log(q) / lambda;
- return result;
-}
-
-template <class RealType, class Policy>
-inline RealType mean(const exponential_distribution<RealType, Policy>& dist)
-{
- RealType result = 0;
- RealType lambda = dist.lambda();
- if(0 == detail::verify_lambda("boost::math::mean(const exponential_distribution<%1%>&)", lambda, &result, Policy()))
- return result;
- return 1 / lambda;
-}
-
-template <class RealType, class Policy>
-inline RealType standard_deviation(const exponential_distribution<RealType, Policy>& dist)
-{
- RealType result = 0;
- RealType lambda = dist.lambda();
- if(0 == detail::verify_lambda("boost::math::standard_deviation(const exponential_distribution<%1%>&)", lambda, &result, Policy()))
- return result;
- return 1 / lambda;
-}
-
-template <class RealType, class Policy>
-inline RealType mode(const exponential_distribution<RealType, Policy>& /*dist*/)
-{
- return 0;
-}
-
-template <class RealType, class Policy>
-inline RealType median(const exponential_distribution<RealType, Policy>& dist)
-{
- using boost::math::constants::ln_two;
- return ln_two<RealType>() / dist.lambda(); // ln(2) / lambda
-}
-
-template <class RealType, class Policy>
-inline RealType skewness(const exponential_distribution<RealType, Policy>& /*dist*/)
-{
- return 2;
-}
-
-template <class RealType, class Policy>
-inline RealType kurtosis(const exponential_distribution<RealType, Policy>& /*dist*/)
-{
- return 9;
-}
-
-template <class RealType, class Policy>
-inline RealType kurtosis_excess(const exponential_distribution<RealType, Policy>& /*dist*/)
-{
- return 6;
-}
-
-} // namespace math
-} // namespace boost
-
-#ifdef BOOST_MSVC
-# pragma warning(pop)
-#endif
-
-// This include must be at the end, *after* the accessors
-// for this distribution have been defined, in order to
-// keep compilers that support two-phase lookup happy.
-#include <boost/math/distributions/detail/derived_accessors.hpp>
-
-#endif // BOOST_STATS_EXPONENTIAL_HPP