Added boost header

test/external/boost/math/tools/traits.hpp

@@ -0,0 +1,111 @@
+//  Copyright John Maddock 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)
+
+/*
+This header defines two traits classes, both in namespace boost::math::tools.
+
+is_distribution<D>::value is true iff D has overloaded "cdf" and
+"quantile" functions, plus member typedefs value_type and policy_type.  
+It's not much of a definitive test frankly,
+but if it looks like a distribution and quacks like a distribution
+then it must be a distribution.
+
+is_scaled_distribution<D>::value is true iff D is a distribution
+as defined above, and has member functions "scale" and "location".
+
+*/
+
+#ifndef BOOST_STATS_IS_DISTRIBUTION_HPP
+#define BOOST_STATS_IS_DISTRIBUTION_HPP
+
+#ifdef _MSC_VER
+#pragma once
+#endif
+
+#include <boost/mpl/has_xxx.hpp>
+// should be the last #include
+#include <boost/type_traits/detail/bool_trait_def.hpp>
+
+namespace boost{ namespace math{ namespace tools{
+
+namespace detail{
+
+BOOST_MPL_HAS_XXX_TRAIT_NAMED_DEF(has_value_type, value_type, true)
+BOOST_MPL_HAS_XXX_TRAIT_NAMED_DEF(has_policy_type, policy_type, true)
+
+template<class D>
+char cdf(const D& ...);
+template<class D>
+char quantile(const D& ...);
+
+template <class D>
+struct has_cdf
+{
+   static D d;
+   BOOST_STATIC_CONSTANT(bool, value = sizeof(cdf(d, 0.0f)) != 1);
+};
+
+template <class D>
+struct has_quantile
+{
+   static D d;
+   BOOST_STATIC_CONSTANT(bool, value = sizeof(quantile(d, 0.0f)) != 1);
+};
+
+template <class D>
+struct is_distribution_imp
+{
+   BOOST_STATIC_CONSTANT(bool, value = 
+      has_quantile<D>::value 
+      && has_cdf<D>::value
+      && has_value_type<D>::value
+      && has_policy_type<D>::value);
+};
+
+template <class sig, sig val>
+struct result_tag{};
+
+template <class D>
+double test_has_location(const volatile result_tag<typename D::value_type (D::*)()const, &D::location>*);
+template <class D>
+char test_has_location(...);
+
+template <class D>
+double test_has_scale(const volatile result_tag<typename D::value_type (D::*)()const, &D::scale>*);
+template <class D>
+char test_has_scale(...);
+
+template <class D, bool b>
+struct is_scaled_distribution_helper
+{
+   BOOST_STATIC_CONSTANT(bool, value = false);
+};
+
+template <class D>
+struct is_scaled_distribution_helper<D, true>
+{
+   BOOST_STATIC_CONSTANT(bool, value = 
+      (sizeof(test_has_location<D>(0)) != 1) 
+      && 
+      (sizeof(test_has_scale<D>(0)) != 1));
+};
+
+template <class D>
+struct is_scaled_distribution_imp
+{
+   BOOST_STATIC_CONSTANT(bool, value = (::boost::math::tools::detail::is_scaled_distribution_helper<D, ::boost::math::tools::detail::is_distribution_imp<D>::value>::value));
+};
+
+} // namespace detail
+
+BOOST_TT_AUX_BOOL_TRAIT_DEF1(is_distribution,T,::boost::math::tools::detail::is_distribution_imp<T>::value)
+BOOST_TT_AUX_BOOL_TRAIT_DEF1(is_scaled_distribution,T,::boost::math::tools::detail::is_scaled_distribution_imp<T>::value)
+
+}}}
+
+#endif
+
+