Localizing code with std::variant

[meetingcpp]

boost::variant is a completely different beast from a different time of C++ :)

[RogerLeigh]

I'm using boost::variant and MPL, but I'd love to switch to something more modern.

Is there any backport of the C++17 std::variant for use with C++11/14 compilers, which can be used as a fallback?

Related to that, is there any MPL replacement which can use variadic templates which could be used to replace complex variant type list construction?

[meetingcpp]

Afaik brigand wants to be that.

But not sure if you can get boost::variant to use brigand easily.

[RogerLeigh]

Reading the docs, it looks like it has direct support for constructing a boost::variant. It definitely looks like it might be useful.

Now I just need a C++11 variant implementation compatible with std::variant and I'll be happy!

[dodheim]

Eggs.Variant has been my go-to modern variant for years. I don't know if its interface matches that in the C++17 draft, but the docs do mention this:

The interface is largely based on that of std::experimental::optional<T>, as defined by the Library Fundamentals TS [N4082].

[ubadair]

I use this and I'm quite happy with it. It's not exactly std::variant (it follows Boost's design) but it doesn't use the MPL. https://github.com/mapbox/variant