You can't compare different types of tupes. (1, 2, 3) = (1, 2) will also bring a type error (int * int and int * int * int are different types). If your tuples can have different sizes (and all elements have the same type), you should use a list.
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How do I express an empty tuple in F#? I assumed that it would be like a list; since '[]' is the empty list, I figured that '()' was the empty tuple. However, if I do something simple like '(1, 2) = ();;', I get an error saying:
stdin(14,9): error: FS0001: This expression has type
unit
but is here used with type
int * int
DC