ceph/src/boost/libs/variant2/README.md

   1 # variant2
   2
   3 This repository contains a never-valueless, strong guarantee, C++11/14/17
   4 implementation of [std::variant](http://en.cppreference.com/w/cpp/utility/variant).
   5 See [the documentation](https://www.boost.org/libs/variant2)
   6 for more information.
   7
   8 The code requires [Boost.Mp11](https://github.com/boostorg/mp11) and
   9 Boost.Config.
  10
  11 The library is part of Boost, starting from release 1.71, but the header
  12 `variant.hpp` will also work [standalone](https://godbolt.org/z/nVUNKX).
  13
  14 Supported compilers:
  15
  16 * g++ 4.8 or later with `-std=c++11` or above
  17 * clang++ 3.5 or later with `-std=c++11` or above
  18 * Visual Studio 2015, 2017, 2019
  19
  20 Tested on [Travis](https://travis-ci.org/boostorg/variant2/) and
  21 [Appveyor](https://ci.appveyor.com/project/pdimov/variant2-fkab9).