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

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

@@ -0,0 +1,54 @@
+/*!
+@file
+Defines `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_LIFT_HPP
+#define BOOST_HANA_LIFT_HPP
+
+#include <boost/hana/fwd/lift.hpp>
+
+#include <boost/hana/concept/applicative.hpp>
+#include <boost/hana/concept/sequence.hpp>
+#include <boost/hana/config.hpp>
+#include <boost/hana/core/dispatch.hpp>
+#include <boost/hana/core/make.hpp>
+
+
+BOOST_HANA_NAMESPACE_BEGIN
+    template <typename A>
+    struct lift_t {
+    #ifndef BOOST_HANA_CONFIG_DISABLE_CONCEPT_CHECKS
+        static_assert(hana::Applicative<A>::value,
+        "hana::lift<A> requires 'A' to be an Applicative");
+    #endif
+
+        template <typename X>
+        constexpr auto operator()(X&& x) const {
+            using Lift = BOOST_HANA_DISPATCH_IF(lift_impl<A>,
+                hana::Applicative<A>::value
+            );
+
+            return Lift::apply(static_cast<X&&>(x));
+        }
+    };
+
+    template <typename A, bool condition>
+    struct lift_impl<A, when<condition>> : default_ {
+        template <typename ...Args>
+        static constexpr auto apply(Args&& ...args) = delete;
+    };
+
+    template <typename S>
+    struct lift_impl<S, when<Sequence<S>::value>> {
+        template <typename X>
+        static constexpr decltype(auto) apply(X&& x)
+        { return hana::make<S>(static_cast<X&&>(x)); }
+    };
+BOOST_HANA_NAMESPACE_END
+
+#endif // !BOOST_HANA_LIFT_HPP