Add Data.Set.mapMaybe
This function is also available for lists (from Data.Maybe) and Maps (Data.Set). The semantics are straightforward:
mapMaybe f = fromList . catMaybes . map f . toListTrac metadata
| Trac field | Value |
|---|---|
| Version | 6.8 |
| Type | Bug |
| TypeOfFailure | OtherFailure |
| Priority | normal |
| Resolution | Unresolved |
| Component | libraries/base |
| Test case | |
| Differential revisions | |
| BlockedBy | |
| Related | |
| Blocking | |
| CC | |
| Operating system | Unknown |
| Architecture | Unknown |