Added thirdparty: boost library

thirdparty/include/boost/math/tools/detail/is_const_iterable.hpp

@@ -0,0 +1,38 @@
+//  (C) Copyright John Maddock 2018.
+//  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_TOOLS_IS_CONST_ITERABLE_HPP
+#define BOOST_MATH_TOOLS_IS_CONST_ITERABLE_HPP
+
+#include <boost/math/tools/cxx03_warn.hpp>
+
+#define BOOST_MATH_HAS_IS_CONST_ITERABLE
+
+#include <boost/math/tools/is_detected.hpp>
+#include <utility>
+
+namespace boost {
+   namespace math {
+      namespace tools {
+         namespace detail {
+
+            template<class T>
+            using begin_t = decltype(std::declval<const T&>().begin());
+            template<class T>
+            using end_t = decltype(std::declval<const T&>().end());
+            template<class T>
+            using const_iterator_t = typename T::const_iterator;
+
+            template <class T>
+            struct is_const_iterable
+               : public std::integral_constant<bool,
+               is_detected<begin_t, T>::value
+               && is_detected<end_t, T>::value
+               && is_detected<const_iterator_t, T>::value
+               > {};
+
+} } } }
+
+#endif // BOOST_MATH_TOOLS_IS_CONST_ITERABLE_HPP