[Haskell-cafe] list of range
frederic-emmanuel.picca at synchrotron-soleil.fr
Mon Oct 4 13:26:08 UTC 2021
Hello, I need to parse a commande line which allows user to describe indices like this
1 -> only one indice
1-5 -> [1..5]
1-5 6-10 ...-> [1..5] ++ [6..10]
My question is what it the best type in order to store this information ?
Range Int = Range Int
| RangeFromTo Int Int
| Range Int <+> Range Int
At some point I would like to add the possibility to have multiples Indices with the ','
1,3,5 -> [1,3,5] list of indices
This type is used at some point as a List.
My question is, are you aware of a similar type in the standar library.
This is the kind of information tahth w should parse when we request to print pages. (list of pages to print).
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