Added thirdparty: boost library

2026-08-16 04:08:10 +00:00 · 2024-01-06 19:55:56 +02:00
parent bf49f439e1
commit bccd1e7051
15683 changed files with 3239840 additions and 0 deletions
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+/*!
+@file
+Defines `boost::hana::Foldable`.
+
+Copyright Louis Dionne 2013-2022
+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_CONCEPT_FOLDABLE_HPP
+#define BOOST_HANA_CONCEPT_FOLDABLE_HPP
+
+#include <boost/hana/fwd/concept/foldable.hpp>
+
+#include <boost/hana/config.hpp>
+#include <boost/hana/core/default.hpp>
+#include <boost/hana/core/tag_of.hpp>
+#include <boost/hana/detail/integral_constant.hpp>
+#include <boost/hana/fold_left.hpp>
+#include <boost/hana/unpack.hpp>
+
+
+namespace boost { namespace hana {
+    template <typename T>
+    struct Foldable
+        : hana::integral_constant<bool,
+            !is_default<fold_left_impl<typename tag_of<T>::type>>::value ||
+            !is_default<unpack_impl<typename tag_of<T>::type>>::value
+        >
+    { };
+}} // end namespace boost::hana
+
+#endif // !BOOST_HANA_CONCEPT_FOLDABLE_HPP