type of IntMap.intersection[WithKey] is incorrect
IntMap.intersectionWith
has declared type (a -> b -> a) -> IntMap a -> IntMap b -> IntMap a
but the true type, correctly inferred by the compiler, is (a -> b -> c) -> IntMap a -> IntMap b -> IntMap c
. This is also the type of the analogous function in the Data.Map library. This broader type signature is necessary for "zipping" maps, i.e. intersectionWith (,)
.
See list post : http://www.haskell.org/pipermail/libraries/2008-May/009677.html
Trac metadata
Trac field | Value |
---|---|
Version | 6.8.3 |
Type | Bug |
TypeOfFailure | OtherFailure |
Priority | normal |
Resolution | Unresolved |
Component | libraries (other) |
Test case | |
Differential revisions | |
BlockedBy | |
Related | |
Blocking | |
CC | |
Operating system | |
Architecture |