Boost as "stdlib prototype" had that type much earlier though, going back to 2002 or so: https://www.boost.org/doc/libs/1_64_0/doc/html/variant.html https://ww

Boost as "stdlib prototype" had that type much earlier though, going back to 2002 or so: https://www.boost.org/doc/libs/1_64_0/doc/html/variant.html https://www.boost.org/doc/libs/1_64_0/doc/html/variant.html The name and concept was also common enough to that I used "Variant" in my own C++ utility class collection around 2005 or so.