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

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

@@ -0,0 +1,59 @@
+/*!
+@file
+Forward declares `boost::hana::lift`.
+
+@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_LIFT_HPP
+#define BOOST_HANA_FWD_LIFT_HPP
+
+#include <boost/hana/config.hpp>
+#include <boost/hana/core/when.hpp>
+
+
+BOOST_HANA_NAMESPACE_BEGIN
+    //! Lift a value into an `Applicative` structure.
+    //! @ingroup group-Applicative
+    //!
+    //! `lift<A>` takes a normal value and embeds it into a structure whose
+    //! shape is represented by the `A` `Applicative`. Note that the value
+    //! may be a function, in which case the created structure may be
+    //! `ap`plied to another `Applicative` structure containing values.
+    //!
+    //!
+    //! Signature
+    //! ---------
+    //! Given an Applicative `A`, the signature is
+    //! @f$ \mathtt{lift}_A : T \to A(T) @f$.
+    //!
+    //! @tparam A
+    //! A tag representing the `Applicative` into which the value is lifted.
+    //!
+    //! @param x
+    //! The value to lift into the applicative.
+    //!
+    //!
+    //! Example
+    //! -------
+    //! @include example/lift.cpp
+#ifdef BOOST_HANA_DOXYGEN_INVOKED
+    template <typename A>
+    constexpr auto lift = [](auto&& x) {
+        return tag-dispatched;
+    };
+#else
+    template <typename A, typename = void>
+    struct lift_impl : lift_impl<A, when<true>> { };
+
+    template <typename A>
+    struct lift_t;
+
+    template <typename A>
+    constexpr lift_t<A> lift{};
+#endif
+BOOST_HANA_NAMESPACE_END
+
+#endif // !BOOST_HANA_FWD_LIFT_HPP