Added thirdparty: boost library

thirdparty/include/boost/histogram/detail/nonmember_container_access.hpp

@@ -0,0 +1,62 @@
+// Copyright 2019 Hans Dembinski
+//
+// 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)
+
+#ifndef BOOST_HISTOGRAM_DETAIL_NONMEMBER_CONTAINER_ACCESS_HPP
+#define BOOST_HISTOGRAM_DETAIL_NONMEMBER_CONTAINER_ACCESS_HPP
+
+#include <initializer_list>
+#include <type_traits>
+#include <valarray>
+
+namespace boost {
+namespace histogram {
+namespace detail {
+
+template <class C>
+constexpr auto data(C& c) -> decltype(c.data()) {
+  return c.data();
+}
+
+template <class C>
+constexpr auto data(const C& c) -> decltype(c.data()) {
+  return c.data();
+}
+
+template <class T, std::size_t N>
+constexpr T* data(T (&array)[N]) noexcept {
+  return array;
+}
+
+template <class E>
+constexpr const E* data(std::initializer_list<E> il) noexcept {
+  return il.begin();
+}
+
+template <class E>
+constexpr const E* data(const std::valarray<E>& v) noexcept {
+  return std::begin(v);
+}
+
+template <class E>
+constexpr E* data(std::valarray<E>& v) noexcept {
+  return std::begin(v);
+}
+
+template <class C>
+constexpr auto size(const C& c) -> decltype(c.size()) {
+  return c.size();
+}
+
+template <class T, std::size_t N>
+constexpr std::size_t size(const T (&)[N]) noexcept {
+  return N;
+}
+
+} // namespace detail
+} // namespace histogram
+} // namespace boost
+
+#endif // BOOST_HISTOGRAM_DETAIL_NONMEMBER_CONTAINER_ACCESS_HPP