[Haskell-beginners] Haskell-style types in C or C++

[Christopher Howard]

One of the things that I love about Haskell is the syntax for creating 
user defined types. E.g.:

Data QueryResult = NoResult | DatabaseError String | Results [String]

I can prototype an entire program around these self-made types and it is 
a lot of fun. Out of intellect curiosity, though: what would be the 
equivalent construction in C or C++? (Say, for the type defined above).

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