Re: [Haskell-cafe] How to create a list of each constructor value

Hi, Am Samstag, dem 03.12.2022 um 20:12 +0100 schrieb Henning Thielemann:

...

if you want to golf it a bit more, then

   [minBound..]

works as well.

Wouldn't this create an infinite tail of undefined value

That’s what I thought until I learned about this. Anyways, ghci says it doesn’t: ghci> [False .. ] [False,True] ghci> [LT .. ] [LT,EQ,GT] [x..] is just enumFrom x, and the docs for Enum says

enumFrom and enumFromThen should be defined with an implicit bound,

https://hackage.haskell.org/package/base-4.17.0.0/docs/Prelude.html#t:Enum Cheers, Joachim -- Joachim Breitner mail@joachim-breitner.de http://www.joachim-breitner.de/