Re: No way to retrieve the base of a Set or Map in O(1)

Hi André,

-----Original message----- From: André van Delden Sent: 18 Jun 2015, 12:27

there seems to be no way to retrieve the base of a Set or Map in O(1), since there is no relevant function in the respective libraries and the constructors Bin and Tip are not exported in any module. I think retrieving any one element from a Set or Map might be useful sometimes, so I modestly ask for an implementation.

do you have any use-case where such function is useful? I am having troubles imagining one. Also note that for IntMap and IntSet you cannot provide such function. To me, this seems more like accessing the internal representation. There have been some discussions about exporting the internal representations in an Unsafe module, which would have no API guarantees (i.e., have Data.Set.Unsafe exporting the Set constructor). Do you really want the proposed function, or would you be more interested in accessing the internal representation? Cheers, Milan