Here are the classes, structs, unions and interfaces with brief descriptions:

[detail level 123]

▼Nopen_cpp_utils
Cany	Wrapper for a value with multiple types
Cany< T, Rest... >
Cany<>
▼Cdirected_tree	Class for creating a directed tree
Cbreadth_first	Breadth first traversal
Cin_order	In-order traversal
Cpost_order	Post-order traversal
Cpre_order	Pre-order traversal
Ctraverser	Visitor pattern for traversing the tree
Cunordered
▼Cfilesystem
Cfile
▼Chash_table
Cconst_iterator
Citerator
▼Cmap
Chash
Cmap_pair
Cobject_list
Coptional