Eggs.Variant is a C++11/14 generic, type-safe, discriminated union. See the documentation at http://eggs-cpp.github.io/variant/.
The library requires a standard conformant implementation of C++11; a few additional features are only available under C++14. Some effort was done to support incomplete language or standard library implementations —see Config —. There are no external dependencies.
The library is continuously tested with the following configurations:
- Clang 3.8, 3.9, 4
- GCC 4.9, 5, 6
- Apple LLVM 7.3, 8.3
- MSVC 2013, 2015, 2017
[Note: Older versions of Clang (3.0+) and GCC (4.6+) are no longer tested, but should still work; please report any issues if you are using them. Older versions of MSVC are not supported.]
The following is an incomplete list of pending functionality to be implemented:
-
Explicit control over the type of the discriminator, introduced via a
basic_variantclass template. -
Layout optimization. Requires even more flavors of special storage.
Copyright Agustín Bergé, Fusion Fenix 2014-2017
Distributed under the Boost Software License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)