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Asked: 2026-05-31T22:34:50+00:00

I am looking for an alternative to C-style union. boost::variant is one such option.

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I am looking for an alternative to C-style union. boost::variant is one such option. Is there anything in std C++ ?

union {
   int i;
   double d;
}
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1 Answer

  1. Editorial Team

    As several commenters said: No, there is no Boost Variant-alike in standard C++. Maybe in a few years there will be, but why wait–use Boost Variant today!

    Edit (four years later, 2016): In C++17 there will be std::variant. Similar but not identical to boost::variant. So when your compiler supports C++17, you will have a solution in the standard library.

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