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 +1,45 @@
+//  (C) Copyright Jeremy Siek 1999.
+// 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)
+
+#ifndef BOOST_TREE_STRUCTURE_HPP
+#define BOOST_TREE_STRUCTURE_HPP
+
+#include <boost/tuple/tuple.hpp> //For boost::tie()
+
+namespace boost {
+
+  template <class T>
+  struct tree_traits {
+    typedef typename T::node_descriptor node_descriptor;    
+    typedef typename T::children_iterator children_iterator;    
+  };
+
+
+  template <class Tree, class TreeVisitor>
+  void traverse_tree(typename tree_traits<Tree>::node_descriptor v,
+                     Tree& t, TreeVisitor visitor)
+  {
+    visitor.preorder(v, t);
+    typename tree_traits<Tree>::children_iterator i, end;
+    boost::tie(i, end) = children(v, t);
+    if (i != end) {
+      traverse_tree(*i++, t, visitor);
+      visitor.inorder(v, t);
+      while (i != end)
+        traverse_tree(*i++, t, visitor);
+    } else
+      visitor.inorder(v, t);
+    visitor.postorder(v, t);
+  }
+
+  struct null_tree_visitor {
+    template <typename Node, typename Tree> void preorder(Node, Tree&) { }
+    template <typename Node, typename Tree> void inorder(Node, Tree&) { }
+    template <typename Node, typename Tree> void postorder(Node, Tree&) { }
+  };
+
+} /* namespace boost */
+
+#endif /* BOOST_TREE_STRUCTURE_HPP */