Add implementation of std::variant

Type-safe unions for C++.

Change-Id: I3c1eb89a240a11d27b07acae588a924a0618173e
Reviewed-by: hjk <hjk@qt.io>

1 files changed, 37 insertions, 0 deletions

diff --git a/src/libs/3rdparty/variant/README.md b/src/libs/3rdparty/variant/README.md
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+# MPark.Variant
+
+> __C++17__ `std::variant` for __C++11__/__14__/__17__
+
+[![release][badge.release]][release]
+[![header][badge.header]][header]
+[![travis][badge.travis]][travis]
+[![appveyor][badge.appveyor]][appveyor]
+[![license][badge.license]][license]
+[![godbolt][badge.godbolt]][godbolt]
+[![wandbox][badge.wandbox]][wandbox]
+
+[badge.release]: https://img.shields.io/github/release/mpark/variant.svg
+[badge.header]: https://img.shields.io/badge/single%20header-master-blue.svg
+[badge.travis]: https://travis-ci.org/mpark/variant.svg?branch=master
+[badge.appveyor]: https://ci.appveyor.com/api/projects/status/github/mpark/variant?branch=master&svg=true
+[badge.license]: https://img.shields.io/badge/license-boost-blue.svg
+[badge.godbolt]: https://img.shields.io/badge/try%20it-on%20godbolt-222266.svg
+[badge.wandbox]: https://img.shields.io/badge/try%20it-on%20wandbox-5cb85c.svg
+
+[release]: https://github.com/mpark/variant/releases/latest
+[header]: https://github.com/mpark/variant/blob/single-header/master/variant.hpp
+[travis]: https://travis-ci.org/mpark/variant
+[appveyor]: https://ci.appveyor.com/project/mpark/variant
+[license]: https://github.com/mpark/variant/blob/master/LICENSE.md
+[godbolt]: https://godbolt.org/g/1qYDAK
+[wandbox]: https://wandbox.org/permlink/QV3gZ2KQQNwgoFIB
+
+## Single Header
+
+This branch provides a standalone `variant.hpp` file for each
+[release](https://github.com/mpark/variant/releases).
+Copy it and `#include` away!
+
+## License
+
+Distributed under the [Boost Software License, Version 1.0](LICENSE.md).