module SSCCE exposing (sscce)
type alias ListOfInts =
List Int
sscce : ListOfInts -> ListOfInts
sscce list =
"oops" :: list
gives the following error messages:
-- TYPE MISMATCH ------------------------------------------------- src/SSCCE.elm
Something is off with the body of the `sscce` definition:
10| "oops" :: list
^^^^^^^^^^^^^^
The body is:
List String
But the type annotation on `sscce` says it should be:
ListOfInts
-- TYPE MISMATCH ------------------------------------------------- src/SSCCE.elm
The (::) operator can only add elements onto lists.
10| "oops" :: list
^^^^
This `list` value is a:
ListOfInts
But (::) needs a List on the right.
The first message is a little confusing because it seems to claim that the body type checks as List String.
The second one is a lot confusing, because it claims that ListOfInts is not a list type. If you only see this error and not the first one you're going to have a hard time fixing it (speaking from experience; there it was not so clear that the new head was of incorrect type).
Trying to compile this module:
gives the following error messages:
List String.ListOfIntsis not a list type. If you only see this error and not the first one you're going to have a hard time fixing it (speaking from experience; there it was not so clear that the new head was of incorrect type).