Hello,
I seem unable to pattern match on this nested union. Here is the relevant
code. The try it function is just here to test if the FIlterType union
works (which doesn't seem to be the case so far)
type FilterType = TypeInt NumberFilter Int | TypeFloat NumberFilter Float |
TypeDate DateFilter | TypeEnum EnumFilter | TypeBool BoolFilter
| TypeGroupBy Int | TypeFiles TextFilter | TypeText TextFilter
type NumberFilter number= NumberIsEmpty | NumberIsNotEmpty | NumberIs
number | NumberIsNot number | NumberLessThan number | NumberGreaterThan
number
| NumberLessOrEqualThan number | NumberGreaterOrEqualThan number |
NumberGroupMinimum | NumberGroupMaximum
| NumberGroupLowest Int | NumberGroupHighest Int
tryIt : FilterType -> Bool
tryIt ft =
case ft of
TypeText f -> processTextFilter f (Just "toto")
TypeFiles f -> processTextFilter f (Just "titi")
TypeInt f o ->
case f of
NumberIs _ -> o==2 -- This is the error line
NumberIsNot _ -> o/=2
NumberIsEmpty -> False
_ -> False
_ -> False
I run into this compilation error:
==== error in src/Model/Filter.elm:66:17: ====
Tag `Model.Filter.NumberIs` is causing problems in this pattern match.
This pattern matches things of type:
NumberFilter
But the values it will actually be trying to match are:
NumberFilter number
I'm confused. I have tried quite a few variations but none of them work.
Any ideas ?
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