The st_tree library implements a C++ template tree container class for storing data in arbitrary tree structures. st_tree is short for “standard template tree,” and supports STL-compatible interfaces including iterators, allocators and standard STL container methods.

The st_tree library allows the programmer to easily declare and manipulate data in a tree:

// declare a tree of integers, where children are stored using a vector storage model
tree<int> t1;  
// declare a tree of strings, where node children are maintained in sorted order
tree<string, ordered<> > t2;
// declare a tree of floating point, where children are indexed by a string label
tree<float, keyed<string> > t3;

The st_tree template container class provides the following features

• Fully featured standard STL container interface, including standard container methods, iterators, typedefs and allocators
• Common tree-related methods, including ply(), depth(), subtree_size(), is_root() and parent()
• Computational efficiency — all operations execute in logarithmic time, except those involving deep copy
• Configurable storage models for child nodes — children of a node may be managed using a vector<> (“raw”), multiset<> (“ordered”) or map<> (“keyed”) container model.
• Compiles under standard ANSI C++
• Unit tested
• Memory tested with valgrind
• Open sourced under the Apache 2.0 License

Documentation for the st_tree template container class and its components can be found here: https://github.com/erikerlandson/st_tree/wiki/st_tree-documentation

The st_tree wiki is here: https://github.com/erikerlandson/st_tree/wiki

The st_tree project home is here: https://github.com/erikerlandson/st_tree

Instructions for download and install are here: https://github.com/erikerlandson/st_tree/wiki/st_tree-installation-and-building

Quick start:

# generate makefiles from cmake
$ cd /path/to/st_tree
$ cmake .
# generate makefiles to build examples from cmake
$ cd /path/to/st_tree
$ cmake . -DBUILD_EXAMPLES=ON
# make examples and tests:
$ make
# run unit tests
$ ./tests/unit_tests
# installs header files and cmake integrations to /usr/local
$ make install

To build st_tree with a particular c++ standard (e.g. c++ 11, 14, 17, etc):

$ cmake -D CMAKE_CXX_STANDARD=14 .

Examples reside in the .../st_tree/examples subdirectory. You can also view an annotated list here: https://github.com/erikerlandson/st_tree/wiki/st_tree-examples