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

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

@@ -0,0 +1,58 @@
+/*!
+@file
+Forward declares `boost::hana::repeat`.
+
+@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_REPEAT_HPP
+#define BOOST_HANA_FWD_REPEAT_HPP
+
+#include <boost/hana/config.hpp>
+#include <boost/hana/core/when.hpp>
+
+
+BOOST_HANA_NAMESPACE_BEGIN
+    //! Invokes a nullary function `n` times.
+    //! @ingroup group-IntegralConstant
+    //!
+    //! Given an `IntegralConstant` `n` and a nullary function `f`,
+    //! `repeat(n, f)` will call `f` `n` times. In particular, any
+    //! decent compiler should expand `repeat(n, f)` to
+    //! @code
+    //!     f(); f(); ... f(); // n times total
+    //! @endcode
+    //!
+    //!
+    //! @param n
+    //! An `IntegralConstant` holding a non-negative value representing
+    //! the number of times `f` should be repeatedly invoked.
+    //!
+    //! @param f
+    //! A function to repeatedly invoke `n` times. `f` is allowed to have
+    //! side effects.
+    //!
+    //!
+    //! Example
+    //! -------
+    //! @include example/repeat.cpp
+#ifdef BOOST_HANA_DOXYGEN_INVOKED
+    constexpr auto repeat = [](auto const& n, auto&& f) -> void {
+        f(); f(); ... f(); // n times total
+    };
+#else
+    template <typename N, typename = void>
+    struct repeat_impl : repeat_impl<N, when<true>> { };
+
+    struct repeat_t {
+        template <typename N, typename F>
+        constexpr void operator()(N const& n, F&& f) const;
+    };
+
+    constexpr repeat_t repeat{};
+#endif
+BOOST_HANA_NAMESPACE_END
+
+#endif // !BOOST_HANA_FWD_REPEAT_HPP