Using std::variant in g++

Question

How can I use std::variant in g++ ? Why isn't there std::variant in std::experimental (though std::optional is)? What version of g++ do I need? I prefer not to use boost and I'd like to use standard library only.

Edit: it seems like only g++ 7 supports std::variant . Then my question is: when will it be released and what problems may I encounter when using its experimental version?

Answer 1

这个页面说，GCC 7有std::variant 。

Answer 2

GCC has an info page where you can check which language feature was implemented with which version. It looks like variant is not yet implemented.