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diff --git a/src/third_party/boost-1.69.0/boost/random/traits.hpp b/src/third_party/boost-1.69.0/boost/random/traits.hpp
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+/* boost random/traits.hpp header file
+ *
+ * Copyright John Maddock 2015
+ * 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)
+ *
+ * See http://www.boost.org for most recent version including documentation.
+ *
+ * These traits classes serve two purposes: they are designed to mostly
+ * work out of the box for multiprecision types (ie number types that are
+ * C++ class types and not integers or floats from type-traits point of view),
+ * they are also a potential point of specialization for user-defined
+ * number types.
+ *
+ * $Id$
+ */
+
+#ifndef BOOST_RANDOM_TRAITS_HPP
+#define BOOST_RANDOM_TRAITS_HPP
+
+#include <boost/type_traits/is_signed.hpp>
+#include <boost/type_traits/is_integral.hpp>
+#include <boost/type_traits/make_unsigned.hpp>
+#include <boost/mpl/bool.hpp>
+#include <limits>
+
+namespace boost {
+namespace random {
+namespace traits {
+   // \cond show_private
+   template <class T, bool intrinsic>
+   struct make_unsigned_imp
+   {
+      typedef typename boost::make_unsigned<T>::type type;
+   };
+   template <class T>
+   struct make_unsigned_imp<T, false>
+   {
+      BOOST_STATIC_ASSERT(std::numeric_limits<T>::is_specialized);
+      BOOST_STATIC_ASSERT(std::numeric_limits<T>::is_signed == false);
+      BOOST_STATIC_ASSERT(std::numeric_limits<T>::is_integer == true);
+      typedef T type;
+   };
+   // \endcond
+   /** \brief Converts the argument type T to an unsigned type.
+   *
+   * This trait has a single member `type` which is the unsigned type corresponding to T.
+   * Note that
+   * if T is signed, then member `type` *should define a type with one more bit precision than T*.  For built-in
+   * types this trait defaults to `boost::make_unsigned<T>::type`.  For user defined types it simply asserts that
+   * the argument type T is an unsigned integer (using std::numeric_limits).
+   * User defined specializations may be provided for other cases.
+   */
+   template <class T>
+   struct make_unsigned
+   // \cond show_private
+      : public make_unsigned_imp < T, boost::is_integral<T>::value > 
+      // \endcond
+   {};
+   // \cond show_private
+   template <class T, bool intrinsic>
+   struct make_unsigned_or_unbounded_imp
+   {
+      typedef typename boost::make_unsigned<T>::type type;
+   };
+   template <class T>
+   struct make_unsigned_or_unbounded_imp<T, false>
+   {
+      BOOST_STATIC_ASSERT(std::numeric_limits<T>::is_specialized);
+      BOOST_STATIC_ASSERT((std::numeric_limits<T>::is_signed == false) || (std::numeric_limits<T>::is_bounded == false));
+      BOOST_STATIC_ASSERT(std::numeric_limits<T>::is_integer == true);
+      typedef T type;
+   };
+   // \endcond
+   /** \brief Converts the argument type T to either an unsigned type or an unbounded integer type.
+   *
+   * This trait has a single member `type` which is either the unsigned type corresponding to T or an unbounded
+   * integer type.  This trait is used to generate types suitable for the calculation of a range: as a result
+   * if T is signed, then member `type` *should define a type with one more bit precision than T*.  For built-in
+   * types this trait defaults to `boost::make_unsigned<T>::type`.  For user defined types it simply asserts that
+   * the argument type T is either an unbounded integer, or an unsigned one (using std::numeric_limits).
+   * User defined specializations may be provided for other cases.
+   */
+   template <class T>
+   struct make_unsigned_or_unbounded
+      // \cond show_private
+      : public make_unsigned_or_unbounded_imp < T, boost::is_integral<T>::value > 
+      // \endcond
+   {};
+   /** \brief Traits class that indicates whether type T is an integer
+   */
+   template <class T>
+   struct is_integral
+      : public mpl::bool_<boost::is_integral<T>::value || (std::numeric_limits<T>::is_integer)>
+   {};
+   /** \brief Traits class that indicates whether type T is a signed integer
+   */
+   template <class T> struct is_signed
+      : public mpl::bool_ < boost::is_signed<T>::value || (std::numeric_limits<T>::is_specialized && std::numeric_limits<T>::is_integer && std::numeric_limits<T>::is_signed)>
+   {};
+
+}
+}
+}
+
+#endif