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 +1,114 @@
+/*!
+@file
+Defines `boost::hana::hash`.
+
+@copyright Jason Rice 2016
+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_HASH_HPP
+#define BOOST_HANA_HASH_HPP
+
+#include <boost/hana/fwd/hash.hpp>
+
+#include <boost/hana/concept/hashable.hpp>
+#include <boost/hana/concept/integral_constant.hpp>
+#include <boost/hana/config.hpp>
+#include <boost/hana/core/dispatch.hpp>
+#include <boost/hana/fwd/integral_constant.hpp>
+#include <boost/hana/type.hpp>
+
+#include <type_traits>
+
+
+BOOST_HANA_NAMESPACE_BEGIN
+    //! @cond
+    template <typename X>
+    constexpr auto hash_t::operator()(X const& x) const {
+        using Tag = typename hana::tag_of<X>::type;
+        using Hash = BOOST_HANA_DISPATCH_IF(hash_impl<Tag>,
+            hana::Hashable<Tag>::value
+        );
+
+#ifndef BOOST_HANA_CONFIG_DISABLE_CONCEPT_CHECKS
+        static_assert(hana::Hashable<Tag>::value,
+        "hana::hash(x) requires 'x' to be Hashable");
+#endif
+
+        return Hash::apply(x);
+    }
+    //! @endcond
+
+    template <typename Tag, bool condition>
+    struct hash_impl<Tag, when<condition>> : default_ {
+        template <typename X>
+        static constexpr auto apply(X const&) = delete;
+    };
+
+    namespace detail {
+        template <typename T, typename = void>
+        struct hash_integral_helper;
+
+        template <typename Member, typename T>
+        struct hash_integral_helper<Member T::*> {
+            template <typename X>
+            static constexpr auto apply(X const&) {
+                return hana::type_c<hana::integral_constant<Member T::*, X::value>>;
+            }
+        };
+
+        template <typename T>
+        struct hash_integral_helper<T,
+            typename std::enable_if<std::is_signed<T>::value>::type
+        > {
+            template <typename X>
+            static constexpr auto apply(X const&) {
+                constexpr signed long long x = X::value;
+                return hana::type_c<hana::integral_constant<signed long long, x>>;
+            }
+        };
+
+        template <typename T>
+        struct hash_integral_helper<T,
+            typename std::enable_if<std::is_unsigned<T>::value>::type
+        > {
+            template <typename X>
+            static constexpr auto apply(X const&) {
+                constexpr unsigned long long x = X::value;
+                return hana::type_c<hana::integral_constant<unsigned long long, x>>;
+            }
+        };
+
+        template <>
+        struct hash_integral_helper<bool> {
+            template <typename X>
+            static constexpr auto apply(X const&) {
+                return hana::type_c<hana::integral_constant<bool, X::value>>;
+            }
+        };
+
+        template <>
+        struct hash_integral_helper<char> {
+            template <typename X>
+            static constexpr auto apply(X const&) {
+                using T = std::conditional<std::is_signed<char>::value,
+                    signed long long, unsigned long long
+                >::type;
+                constexpr T x = X::value;
+                return hana::type_c<hana::integral_constant<T, x>>;
+            }
+        };
+    }
+
+    template <typename Tag>
+    struct hash_impl<Tag, when<hana::IntegralConstant<Tag>::value>> {
+        template <typename X>
+        static constexpr auto apply(X const& x) {
+            using T = typename std::remove_cv<decltype(X::value)>::type;
+            return detail::hash_integral_helper<T>::apply(x);
+        }
+    };
+BOOST_HANA_NAMESPACE_END
+
+#endif // !BOOST_HANA_HASH_HPP