Added thirdparty: boost library

thirdparty/include/boost/hana/fwd/insert.hpp

@@ -0,0 +1,60 @@
+/*!
+@file
+Forward declares `boost::hana::insert`.
+
+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_FWD_INSERT_HPP
+#define BOOST_HANA_FWD_INSERT_HPP
+
+#include <boost/hana/config.hpp>
+#include <boost/hana/core/when.hpp>
+
+
+namespace boost { namespace hana {
+    // Note: This function is documented per datatype/concept only.
+    //! @cond
+    template <typename T, typename = void>
+    struct insert_impl : insert_impl<T, when<true>> { };
+    //! @endcond
+
+    struct insert_t {
+        template <typename Set, typename ...Args>
+        constexpr decltype(auto) operator()(Set&& set, Args&& ...args) const;
+    };
+
+    BOOST_HANA_INLINE_VARIABLE constexpr insert_t insert{};
+
+
+    //! Insert a value at a given index in a sequence.
+    //! @ingroup group-Sequence
+    //!
+    //! Given a sequence, an index and an element to insert, `insert` inserts
+    //! the element at the given index.
+    //!
+    //! @param xs
+    //! The sequence in which a value should be inserted.
+    //!
+    //! @param n
+    //! The index at which an element should be inserted. This must be a
+    //! non-negative `Constant` of an integral type, and it must also be
+    //! true that `n < length(xs)` if `xs` is a finite sequence.
+    //!
+    //! @param element
+    //! The element to insert in the sequence.
+    //!
+    //!
+    //! Example
+    //! -------
+    //! @include example/insert.cpp
+#ifdef BOOST_HANA_DOXYGEN_INVOKED
+    constexpr auto insert = [](auto&& xs, auto&& n, auto&& element) {
+        return tag-dispatched;
+    };
+#endif
+}} // end namespace boost::hana
+
+#endif // !BOOST_HANA_FWD_INSERT_HPP