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

2026-02-24 18:38:47 +00:00
parent da8c28aaeb
commit 65cb2619a7
13106 changed files with 2484322 additions and 1804 deletions
@@ -0,0 +1,44 @@
+/*!
+@file
+Defines `boost::hana::ordering`.
+
+@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_ORDERING_HPP
+#define BOOST_HANA_ORDERING_HPP
+
+#include <boost/hana/fwd/ordering.hpp>
+
+#include <boost/hana/config.hpp>
+#include <boost/hana/detail/decay.hpp>
+#include <boost/hana/less.hpp>
+
+
+BOOST_HANA_NAMESPACE_BEGIN
+    namespace detail {
+        template <typename F>
+        struct less_by {
+            F f;
+
+            template <typename X, typename Y>
+            constexpr decltype(auto) operator()(X&& x, Y&& y) const&
+            { return hana::less(f(static_cast<X&&>(x)), f(static_cast<Y&&>(y))); }
+
+            template <typename X, typename Y>
+            constexpr decltype(auto) operator()(X&& x, Y&& y) &
+            { return hana::less(f(static_cast<X&&>(x)), f(static_cast<Y&&>(y))); }
+        };
+    }
+
+    //! @cond
+    template <typename F>
+    constexpr auto ordering_t::operator()(F&& f) const {
+        return detail::less_by<typename detail::decay<F>::type>{static_cast<F&&>(f)};
+    }
+    //! @endcond
+BOOST_HANA_NAMESPACE_END
+
+#endif // !BOOST_HANA_ORDERING_HPP