stabilize build system: depends, installer, boost/bdb fixes, cross targets groundwork

depends/x86_64-pc-linux-gnu/include/boost/hana/fwd/insert_range.hpp

@@ -0,0 +1,57 @@
+/*!
+@file
+Forward declares `boost::hana::insert_range`.
+
+@copyright Louis Dionne 2013-2017
+Distributed under the Boost Software License, Version 1.0.
+(See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt)
+ */
+
+#ifndef BOOST_HANA_FWD_INSERT_RANGE_HPP
+#define BOOST_HANA_FWD_INSERT_RANGE_HPP
+
+#include <boost/hana/config.hpp>
+#include <boost/hana/core/when.hpp>
+
+
+BOOST_HANA_NAMESPACE_BEGIN
+    //! Insert several values at a given index in a sequence.
+    //! @ingroup group-Sequence
+    //!
+    //! Given a sequence, an index and any `Foldable` containing elements to
+    //! insert, `insert_range` inserts the elements in the `Foldable` at the
+    //! given index of the sequence.
+    //!
+    //! @param xs
+    //! The sequence in which values should be inserted.
+    //!
+    //! @param n
+    //! The index at which elements should be inserted. This must be a
+    //! non-negative `Constant` of an integral type, and it must also be
+    //! true that `n < length(xs)` if `xs` is a finite sequence.
+    //!
+    //! @param elements
+    //! A `Foldable` containing elements to insert in the sequence.
+    //!
+    //!
+    //! Example
+    //! -------
+    //! @include example/insert_range.cpp
+#ifdef BOOST_HANA_DOXYGEN_INVOKED
+    constexpr auto insert_range = [](auto&& xs, auto&& n, auto&& elements) {
+        return tag-dispatched;
+    };
+#else
+    template <typename S, typename = void>
+    struct insert_range_impl : insert_range_impl<S, when<true>> { };
+
+    struct insert_range_t {
+        template <typename Xs, typename N, typename Elements>
+        constexpr auto operator()(Xs&& xs, N&& n, Elements&& elements) const;
+    };
+
+    constexpr insert_range_t insert_range{};
+#endif
+BOOST_HANA_NAMESPACE_END
+
+#endif // !BOOST_HANA_FWD_INSERT_RANGE_HPP