CODEWITHSUNDEEP
elm
altern
altern

Reputation: 5949

Type alias for list of other types in Elm

If I try to define new type alias, for example, in a following manner:

type alias ListOfInts = [Int]

I get following error:

I was partway through parsing a type alias, but I got stuck here:

11| type alias ListOfInts = [Int]
                            ^
I was expecting to see a type next. Try putting Int or String for now?

Is there a way to define type alias for Lists in Elm?

Upvotes: 2

Views: 287

Answers (1)

Robin Zigmond
Robin Zigmond

Reputation: 18259

Unlike some other languages such as Haskell, Elm does not use square brackets as special notation for its list type. Consequently, as the compiler tells you, it can't make sense of the [ in a context where it expects to see a type.

The type is instead written List Int, as you can find for example in the Elm guide.

So just change your code to this:

type alias ListOfInts = List Int

Upvotes: 4

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