Jonas (Dec 06 2024 at 15:06): Jonas (Dec 06 2024 at 15:06):can i check the length of tuple or Pattern match on Tupel with Different Size
Anton (Dec 06 2024 at 15:18):can i check the length of tuple
No sorry
Pattern match on Tupel with Different Size
That should work, it does have some limitations right now #5530 #6802
Richard Feldman (Dec 06 2024 at 15:25):I think this is the first time anyone has asked about this, so I'm really curious what the use case is! :smiley:
Jonas (Dec 06 2024 at 15:26):i thougth to have base case for some thing were i just have to elements in the tupel
Jonas (Dec 06 2024 at 15:26):the third one is for an option
Jonas (Dec 06 2024 at 15:41):i wanting to make range method were u give a Tupel instead of an struct as paramater
jan kili (Dec 07 2024 at 03:36):I believe that doesn't make sense in Roc because (Str, Str) is a completely distinct type from (Str, Str, Str), so you couldn't pass one instead of the other.
Luke Boswell (Dec 07 2024 at 03:38):They are fixed at compile time, not something that can change size at runtime
jan kili (Dec 07 2024 at 03:38):You could combine them with a tag union like TwoOrThreeStrings : [TwoStrings (Str, Str), ThreeStrings (Str, Str, Str)]
Anthony Bullard (Dec 07 2024 at 13:58):Yeah and usually those different cases have a different semantic meaning in your program, so you can make the Tags much more meaningful
jan kili (Dec 07 2024 at 15:47):Absolutely - my example would be way better contextualized like SameAgeSiblings : [Twins (Str, Str), Triplets (Str, Str, Str)]
Last updated: Jul 26 2025 at 12:14 UTC