third_party/boost/multi_index/README.md

# Boost Multi-index Containers Library

Branch   | Travis | Drone | AppVeyor | Regression tests
---------|--------|-------|----------|-----------------
develop  | [![Build Status](https://travis-ci.com/boostorg/multi_index.svg?branch=develop)](https://travis-ci.com/boostorg/multi_index) | [![Build Status](https://drone.cpp.al/api/badges/boostorg/multi_index/status.svg?ref=refs/heads/develop)](https://drone.cpp.al/boostorg/multi_index) | [![Build Status](https://ci.appveyor.com/api/projects/status/github/boostorg/multi_index?branch=develop&svg=true)](https://ci.appveyor.com/project/joaquintides/multi-index) | [![Test Results](./test_results.svg)](https://www.boost.org/development/tests/develop/developer/multi_index.html)
master   | [![Build Status](https://travis-ci.com/boostorg/multi_index.svg?branch=master)](https://travis-ci.com/boostorg/multi_index) | [![Build Status](https://drone.cpp.al/api/badges/boostorg/multi_index/status.svg?ref=refs/heads/master)](https://drone.cpp.al/boostorg/multi_index) | [![Build Status](https://ci.appveyor.com/api/projects/status/github/boostorg/multi_index?branch=master&svg=true)](https://ci.appveyor.com/project/joaquintides/multi-index) | [![Test Results](./test_results.svg)](https://www.boost.org/development/tests/master/developer/multi_index.html)

[Boost.MultiIndex](http://boost.org/libs/multi_index) provides a class template
named `multi_index_container` which enables the construction of containers
maintaining one or more indices with different sorting and access semantics.