Make arrays safer
This is a proposal to make arrays safer (e.g. see #1046 (closed)).
This is a divergence from Haskell 98.
The patches:
-
Add (numElements :: Ix i => a i e -> Int) to IArray class
-
Array types get an extra field for numElements, e.g.
-data UArray i e = UArray !i !i ByteArray# +data UArray i e = UArray !i !i !Int ByteArray#This is a cache of rangeSize(l,u)
-
Add safeRangeSize (always returns >= 0)
-
Add safeIndex (use unsafeIndex (no Ix inRange check), but check index < numElements)
-
unsafeForeignPtrToStorableArray gained an (Ix i) context
-
Use the new functions in various places
Suggested deadline: 24 Aug 2007.
Trac metadata
| Trac field | Value |
|---|---|
| Version | 6.6.1 |
| Type | Bug |
| TypeOfFailure | OtherFailure |
| Priority | high |
| Resolution | Unresolved |
| Component | libraries (other) |
| Test case | |
| Differential revisions | |
| BlockedBy | |
| Related | |
| Blocking | |
| CC | |
| Operating system | Unknown |
| Architecture | Unknown |