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## next (edit as necessary)
- `magicDict` has been renamed to `withDict` and is now defined in
`GHC.Magic.Dict` instead of `GHC.Prim`. `withDict` now has the type:
```
withDict :: forall {rr :: RuntimeRep} st dt (r :: TYPE rr). st -> (dt => r) -> r
```
Unlike `magicDict`, `withDict` can be used without defining an
intermediate data type. For example, the `withTypeable` function from the
`Data.Typeable` module can now be defined as:
```
withTypeable :: forall k (a :: k) rep (r :: TYPE rep). ()
=> TypeRep a -> (Typeable a => r) -> r
withTypeable rep k = withDict @(TypeRep a) @(Typeable a) rep k
```
Note that the explicit type applications are required, as the call to
`withDict` would be ambiguous otherwise.
## 0.8.0 (edit as necessary)
- Change array access primops to use type with size maxing the element size:
- `index{Int,Word}<N>Array# :: ByteArray# -> Int# -> {Int,Word}<N>#`
- `indexWord8ArrayAs{Int,Word}<N># :: ByteArray# -> Int# -> {Int,Word}<N>#`
- `read{Int,Word}<N>Array# :: MutableByteArray# s -> Int# -> State# s -> (# State# s, {Int,Word}<N># #)`
- `write{Int,Word}<N>Array# :: MutableByteArray# s -> Int# -> {Int,Word}<N># -> State# s -> State# s`
- `readWord8ArrayAs{Int,Word}<N># :: MutableByteArray# s -> Int# -> State# s -> (# State# s, {Int,Word}<N># #)`
- `writeWord8ArrayAs{Int,Word}<N># :: MutableByteArray# s -> Int# -> {Int,Word}<N># -> State# s -> State# s`
This was already the for the 64-bit access primops, but not the smaller ones.
- Rename some numeric prim type conversion primops:
- `extend{Int,Word}<N>#` -> `extend<N>To{Int,Word}#`
- `narrow{Int,Word}<N>#` -> `intTo{Int,Word}<N>#`
## 0.7.0 (edit as necessary)
- Shipped with GHC 9.0.1
- Add known-key `cstringLength#` to `GHC.CString`. This is just the
C function `strlen`, but a built-in rewrite rule allows GHC to
compute the result at compile time when the argument is known.
- In order to support unicode better the following functions in `GHC.CString`
gained UTF8 counterparts:
unpackAppendCStringUtf8# :: Addr# -> [Char] -> [Char]
unpackFoldrCStringUtf8# :: Addr# -> (Char -> a -> a) -> a -> a
- unpackFoldrCString* variants can now inline in phase [0].
If the folding function is known this allows for unboxing of the
Char argument resulting in much faster code.
- Renamed the singleton tuple `GHC.Tuple.Unit` to `GHC.Tuple.Solo`.
- Add primops for atomic exchange:
atomicExchangeAddrAddr# :: Addr# -> Addr# -> State# s -> (# State# s, Addr# #)
atomicExchangeWordAddr# :: Addr# -> Word# -> State# s -> (# State# s, Word# #)
- Add primops for atomic compare and swap at a given Addr#:
atomicCasAddrAddr# :: Addr# -> Addr# -> Addr# -> State# s -> (# State# s, Addr# #)
atomicCasWordAddr# :: Addr# -> Word# -> Word# -> State# s -> (# State# s, Word# #)
- Add an explicit fixity for `(~)` and `(~~)`:
infix 4 ~, ~~
- Introduce `keepAlive#` to replace `touch#` in controlling object lifetime without
the soundness issues of the latter (see
[#17760](https://gitlab.haskell.org/ghc/ghc/-/issues/17760)).
## 0.6.1 (edit as necessary)
- Shipped with GHC 8.10.1
- Add primop for shrinking `SmallMutableArray#`
to `GHC.Prim`:
shrinkSmallMutableArray# :: SmallMutableArray# s a -> Int# -> State# s -> State# s
Note that `resizeSmallMutableArray#` is not included as
as primitive. It has been implemented in library space in
`GHC.Exts`. See the release notes of `base`.
- Added to `GHC.Prim`:
closureSize# :: a -> Int#
- Added to `GHC.Prim`:
bitReverse# :: Word# -> Word#
bitReverse8# :: Word# -> Word#
bitReverse16# :: Word# -> Word#
bitReverse32# :: Word# -> Word#
bitReverse64# :: Word# -> Word#
`bitReverse#` is a primop that, for a `Word` of 8, 16, 32 or 64 bits,
reverses the order of its bits e.g. `0b110001` becomes `0b100011`.
These primitives use optimized machine instructions when available.
- Add Int# multiplication primop:
timesInt2# :: Int# -> Int# -> (# Int#, Int#, Int# #)
`timesInt2#` computes the multiplication of its two parameters and returns a
triple (isHighNeeded,high,low) where high and low are respectively the high
and low bits of the double-word result. isHighNeeded is a cheap way to test
if the high word is a sign-extension of the low word (isHighNeeded = 0#) or
not (isHighNeeded = 1#).
## 0.6.0
- Shipped with GHC 8.8.1
- Added to `GHC.Prim`:
traceBinaryEvent# :: Addr# -> Int# -> State# s -> State# s
## 0.5.3
- Shipped with GHC 8.6.1
- Added to `GHC.Prim`:
addWordC# :: Word# -> Word# -> (# Word#, Int# #)
- `unpackClosure#` can now unpack any valid Haskell closure.
Previously it returned empty pointer and non-pointer arrays
for thunks.
- Add unaligned bytearray access primops (#4442)
readWord8ArrayAsChar# :: MutableByteArray# s -> Int# -> State# s -> (# State# s, Char# #)
readWord8ArrayAsAddr# :: MutableByteArray# s -> Int# -> State# s -> (# State# s, Addr# #)
readWord8ArrayAsFloat# :: MutableByteArray# s -> Int# -> State# s -> (# State# s, Float# #)
readWord8ArrayAsDouble# :: MutableByteArray# s -> Int# -> State# s -> (# State# s, Double# #)
readWord8ArrayAsStablePtr# :: MutableByteArray# s -> Int# -> State# s -> (# State# s, StablePtr# #)
readWord8ArrayAsInt16# :: MutableByteArray# s -> Int# -> State# s -> (# State# s, Int16# #)
readWord8ArrayAsInt32# :: MutableByteArray# s -> Int# -> State# s -> (# State# s, Int32# #)
readWord8ArrayAsInt64# :: MutableByteArray# s -> Int# -> State# s -> (# State# s, Int64# #)
readWord8ArrayAsInt# :: MutableByteArray# s -> Int# -> State# s -> (# State# s, Int# #)
readWord8ArrayAsWord16# :: MutableByteArray# s -> Int# -> State# s -> (# State# s, Word16# #)
readWord8ArrayAsWord32# :: MutableByteArray# s -> Int# -> State# s -> (# State# s, Word32# #)
readWord8ArrayAsWord64# :: MutableByteArray# s -> Int# -> State# s -> (# State# s, Word64# #)
readWord8ArrayAsWord# :: MutableByteArray# s -> Int# -> State# s -> (# State# s, Word# #)
writeWord8ArrayAsChar# :: MutableByteArray# s -> Int# -> Char# -> State# s -> State# s
writeWord8ArrayAsAddr# :: MutableByteArray# s -> Int# -> Addr# -> State# s -> State# s
writeWord8ArrayAsFloat# :: MutableByteArray# s -> Int# -> Float# -> State# s -> State# s
writeWord8ArrayAsDouble# :: MutableByteArray# s -> Int# -> Double# -> State# s -> State# s
writeWord8ArrayAsStablePtr# :: MutableByteArray# s -> Int# -> StablePtr# -> State# s -> State# s
writeWord8ArrayAsInt16# :: MutableByteArray# s -> Int# -> Int16# -> State# s -> State# s
writeWord8ArrayAsInt32# :: MutableByteArray# s -> Int# -> Int32# -> State# s -> State# s
writeWord8ArrayAsInt64# :: MutableByteArray# s -> Int# -> Int64# -> State# s -> State# s
writeWord8ArrayAsInt# :: MutableByteArray# s -> Int# -> Int# -> State# s -> State# s
writeWord8ArrayAsWord16# :: MutableByteArray# s -> Int# -> Word16# -> State# s -> State# s
writeWord8ArrayAsWord32# :: MutableByteArray# s -> Int# -> Word32# -> State# s -> State# s
writeWord8ArrayAsWord64# :: MutableByteArray# s -> Int# -> Word64# -> State# s -> State# s
writeWord8ArrayAsWord# :: MutableByteArray# s -> Int# -> Word# -> State# s -> State# s
## 0.5.2.0
- Shipped with GHC 8.4.1
- Added to `GHC.Prim`:
compareByteArrays# :: ByteArray# -> Int# -> ByteArray# -> Int# -> Int# -> Int#
- Don't allocate a thunk for each unpacked UTF-8 character in `unpackCStringUtf8#`
## 0.5.1.1 *November 2017*
- Shipped with GHC 8.2.2
- Changed strictness properties of `catchRetry#` (#14171)
## 0.5.1.0 *July 2017*
- Shipped with GHC 8.2.1
- Added to `GHC.Prim`:
fabsDouble# :: Double# -> Double#
fabsFloat# :: Float# -> Float#
isByteArrayPinned# :: ByteArray# -> Int#
isMutableByteArrayPinned# :: MutableByteArray# s -> Int#
anyToAddr# :: a -> State# (RealWorld) -> (# State# (RealWorld),Addr# #)
- New primitives for compact regions in `GHC.Prim`:
Compact#
compactNew#
compactResize#
compactContains#
compactContainsAny#
compactGetFirstBlock#
compactGetNextBlock#
compactAllocateBlock#
compactFixupPointers#
compactAdd#
compactAddWithSharing#
compactSize#
- Generalised `noDuplicate#` from
noDuplicate# :: State# (RealWorld) -> State# (RealWorld)
to
noDuplicate# :: State# s -> State# s
## 0.5.0.0
- Shipped with GHC 8.0.1
- `GHC.Classes`: new `class IP (a :: Symbol) b | a -> b`
- `GHC.Prim`: changed type signatures from
check# :: (State# RealWorld -> (# State# RealWorld, a #)) -> State# RealWorld -> (# State# RealWorld, () #)
finalizeWeak# :: Weak# a -> State# RealWorld -> (# State# RealWorld, Int#, State# RealWorld -> (# State# RealWorld, () #) #)
mkWeak# :: a -> b -> c -> State# RealWorld -> (# State# RealWorld, Weak# b #)
to
check# :: (State# RealWorld -> (# State# RealWorld, a #)) -> State# RealWorld -> State# RealWorld
finalizeWeak# :: Weak# a -> State# RealWorld -> (# State# RealWorld, Int#, State# RealWorld -> (# State# RealWorld, b #) #)
mkWeak# :: a -> b -> (State# RealWorld -> (# State# RealWorld, c #)) -> State# RealWorld -> (# State# RealWorld, Weak# b #)
- Removed from `GHC.Prim`:
parAt# :: b -> a -> Int# -> Int# -> Int# -> Int# -> c -> Int#
parAtAbs# :: a -> Int# -> Int# -> Int# -> Int# -> Int# -> b -> Int#
parAtForNow# :: b -> a -> Int# -> Int# -> Int# -> Int# -> c -> Int#
parAtRel# :: a -> Int# -> Int# -> Int# -> Int# -> Int# -> b -> Int#
parGlobal# :: a -> Int# -> Int# -> Int# -> Int# -> b -> Int#
parLocal# :: a -> Int# -> Int# -> Int# -> Int# -> b -> Int#
- Added to `GHC.Prim`:
getSizeofMutableByteArray# :: MutableByteArray# d -> State# d -> (# State# d, Int# #)
subWordC# :: Word# -> Word# -> (# Word#, Int# #)
runRW# :: (State# RealWorld -> (# State# RealWorld, o #)) -> (# State# RealWorld, o #)
- Added to `GHC.Types`:
data Module = Module TrName TrName
data Nat
data Symbol
data TrName = TrNameS Addr# | TrNameD [Char]
data TyCon = TyCon Word# Word# Module TrName
|
