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 +1,65 @@
+/*!
+@file
+Defines `boost::hana::power`.
+
+@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_POWER_HPP
+#define BOOST_HANA_POWER_HPP
+
+#include <boost/hana/fwd/power.hpp>
+
+#include <boost/hana/concept/integral_constant.hpp>
+#include <boost/hana/concept/ring.hpp>
+#include <boost/hana/config.hpp>
+#include <boost/hana/core/dispatch.hpp>
+#include <boost/hana/functional/iterate.hpp>
+#include <boost/hana/functional/partial.hpp>
+#include <boost/hana/mult.hpp>
+#include <boost/hana/one.hpp>
+
+#include <cstddef>
+
+
+BOOST_HANA_NAMESPACE_BEGIN
+    //! @cond
+    template <typename X, typename N>
+    constexpr decltype(auto) power_t::operator()(X&& x, N const& n) const {
+        using R = typename hana::tag_of<X>::type;
+        using Power = BOOST_HANA_DISPATCH_IF(power_impl<R>,
+            hana::Ring<R>::value &&
+            hana::IntegralConstant<N>::value
+        );
+
+    #ifndef BOOST_HANA_CONFIG_DISABLE_CONCEPT_CHECKS
+        static_assert(hana::Ring<R>::value,
+        "hana::power(x, n) requires 'x' to be in a Ring");
+
+        static_assert(hana::IntegralConstant<N>::value,
+        "hana::power(x, n) requires 'n' to be an IntegralConstant");
+    #endif
+
+        static_assert(N::value >= 0,
+        "hana::power(x, n) requires 'n' to be non-negative");
+
+        return Power::apply(static_cast<X&&>(x), n);
+    }
+    //! @endcond
+
+    template <typename R, bool condition>
+    struct power_impl<R, when<condition>> : default_ {
+        template <typename X, typename N>
+        static constexpr decltype(auto) apply(X&& x, N const&) {
+            constexpr std::size_t n = N::value;
+            return hana::iterate<n>(
+                hana::partial(hana::mult, static_cast<X&&>(x)),
+                hana::one<R>()
+            );
+        }
+    };
+BOOST_HANA_NAMESPACE_END
+
+#endif // !BOOST_HANA_POWER_HPP