Added thirdparty: boost library

thirdparty/include/boost/multi_index/detail/any_container_view.hpp

@@ -0,0 +1,76 @@
+/* Copyright 2003-2021 Joaquin M Lopez Munoz.
+ * Distributed under the Boost Software License, Version 1.0.
+ * (See accompanying file LICENSE_1_0.txt or copy at
+ * http://www.boost.org/LICENSE_1_0.txt)
+ *
+ * See http://www.boost.org/libs/multi_index for library home page.
+ */
+
+#ifndef BOOST_MULTI_INDEX_DETAIL_ANY_CONTAINER_VIEW_HPP
+#define BOOST_MULTI_INDEX_DETAIL_ANY_CONTAINER_VIEW_HPP
+
+#if defined(_MSC_VER)
+#pragma once
+#endif
+
+namespace boost{
+
+namespace multi_index{
+
+namespace detail{
+
+/* type-erased, non-owning view over a ConstIterator-container's range */
+
+template<typename ConstIterator>
+class any_container_view
+{
+public:
+  template<typename Container>
+  any_container_view(const Container& x):px(&x),pt(vtable_for<Container>()){}
+
+  const void*   container()const{return px;}
+  ConstIterator begin()const{return pt->begin(px);}
+  ConstIterator end()const{return pt->end(px);}
+
+private:
+  struct vtable
+  {
+    ConstIterator (*begin)(const void*);
+    ConstIterator (*end)(const void*);
+  };
+
+  template<typename Container>
+  static ConstIterator begin_for(const void* px)
+  {
+    return static_cast<const Container*>(px)->begin();
+  }
+
+  template<typename Container>
+  static ConstIterator end_for(const void* px)
+  {
+    return static_cast<const Container*>(px)->end();
+  }
+
+  template<typename Container>
+  vtable* vtable_for()
+  {
+    static vtable v=
+    {
+      &begin_for<Container>,
+      &end_for<Container>
+    };
+
+    return &v;
+  }
+
+  const void* px;
+  vtable*     pt;
+};
+
+} /* namespace multi_index::detail */
+
+} /* namespace multi_index */
+
+} /* namespace boost */
+
+#endif