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by gumby 3233 days ago
> Most of the time I'd recommend the new type-safe union std::variant

Neither g++ 7 nor Clang/LLVM 4.0.1 support std::variant yet :-(. We started a new (blank buffer) codebase earlier this year and decided to use C++17 as the implementation language, which has exposed us to the gaps...which are surprisingly few! But sadly this is one of them.
1 comments
shakna 3233 days ago
> Neither g++ 7

Eh? I've been using it a hell of a lot!

std::variant is listed on GCC 7's page [0], and I know that is there in at least 7.1

I don't use clang much, but they list it as supported [1], and I believe the patch [2] landed in 5.0

[0] https://gcc.gnu.org/gcc-7/changes.html

[1] https://libcxx.llvm.org/cxx1z_status.html

[2] https://reviews.llvm.org/rL288547

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gumby 3233 days ago
Hmm, have to check include paths again!
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shakna 3231 days ago
So I glanced over this, and found that std::variant is in libc++, as you would expect, but in some cases, when you get a nice modern compiler, you might not end up with it linked to a nice modern stdlib.

So maybe some sort of mis-match got in your way.

Anyways, here's hoping you get to use C++17 in its full glory!

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