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Re:Algebraic Data Types: Things I wish someone had explained... by saghm on Tuesday November 19, 2019 @03:06PM (#21577671)
> They're part of Pascal (known as variant records) and plenty of other languages besides.

It sounds like GP is saying they had never used of those languages beforehand. I'm not sure why would be so surprising given that it doesn't accompany any other information like "and I had used 20 other languages before it".

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