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

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

@@ -0,0 +1,64 @@
+/*!
+@file
+Forward declares `boost::hana::replace`.
+
+@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_REPLACE_HPP
+#define BOOST_HANA_FWD_REPLACE_HPP
+
+#include <boost/hana/config.hpp>
+#include <boost/hana/core/when.hpp>
+
+
+BOOST_HANA_NAMESPACE_BEGIN
+    //! Replace all the elements of a structure that compare equal
+    //! to some `value` with some new fixed value.
+    //! @ingroup group-Functor
+    //!
+    //!
+    //! Signature
+    //! ---------
+    //! Given `F` a Functor and `U` a type that can be compared with `T`,
+    //! the signature is
+    //! \f$
+    //!     \mathtt{replace} : F(T) \times U \times T \to F(T)
+    //! \f$
+    //!
+    //! @param xs
+    //! The structure to replace elements of.
+    //!
+    //! @param oldval
+    //! An object compared with each element of the structure. Elements
+    //! of the structure that compare equal to `oldval` are replaced
+    //! by `newval` in the new structure.
+    //!
+    //! @param newval
+    //! A value by which every element `x` of the structure that compares
+    //! equal to `oldval` is replaced.
+    //!
+    //!
+    //! Example
+    //! -------
+    //! @include example/replace.cpp
+#ifdef BOOST_HANA_DOXYGEN_INVOKED
+    constexpr auto replace = [](auto&& xs, auto&& oldval, auto&& newval) {
+        return tag-dispatched;
+    };
+#else
+    template <typename Xs, typename = void>
+    struct replace_impl : replace_impl<Xs, when<true>> { };
+
+    struct replace_t {
+        template <typename Xs, typename OldVal, typename NewVal>
+        constexpr auto operator()(Xs&& xs, OldVal&& oldval, NewVal&& newval) const;
+    };
+
+    constexpr replace_t replace{};
+#endif
+BOOST_HANA_NAMESPACE_END
+
+#endif // !BOOST_HANA_FWD_REPLACE_HPP