Darcs.Hopefully
- data Hopefully a
- data PatchInfoAnd p
- piap :: PatchInfo -> Named p -> PatchInfoAnd p
- n2pia :: Named p -> PatchInfoAnd p
- patchInfoAndPatch :: PatchInfo -> Hopefully (Named p) -> PatchInfoAnd p
- conscientiously :: (Doc -> Doc) -> PatchInfoAnd p -> Named p
- hopefully :: PatchInfoAnd p -> Named p
- info :: PatchInfoAnd p -> PatchInfo
- hopefullyM :: Monad m => PatchInfoAnd p -> m (Named p)
- createHashed :: String -> (String -> IO (Sealed a)) -> IO (Sealed (Hopefully a))
- extractHash :: PatchInfoAnd p -> Either (Named p) String
- actually :: a -> Hopefully a
- unavailable :: String -> Hopefully a
Documentation
Hopefully p C(x y) is Either String (p C(x y)) in a
form adapted to darcs patches. The C (x y) represents the type
witness for the patch that should be there. The Hopefully type
just tells whether we expect the patch to be hashed or not, and
SimpleHopefully does the real work of emulating
Either. Hopefully sh represents an expected unhashed patch, and
Hashed hash sh represents an expected hashed patch with its hash.
data PatchInfoAnd p Source
PatchInfoAnd p
Instances
| MyEq p => MyEq (PatchInfoAnd p) | |
| Invert p => Invert (PatchInfoAnd p) | |
| ReadPatch p => ReadPatch (PatchInfoAnd p) | |
| (Conflict p, Effect p, ShowPatch p) => ShowPatch (PatchInfoAnd p) | |
| Commute p => Commute (PatchInfoAnd p) | |
| Apply p => Apply (PatchInfoAnd p) | |
| RepoPatch p => Patchy (PatchInfoAnd p) | |
| Effect p => Effect (PatchInfoAnd p) | |
| Conflict p => Conflict (PatchInfoAnd p) |
piap :: PatchInfo -> Named p -> PatchInfoAnd pSource
piap i p
n2pia :: Named p -> PatchInfoAnd pSource
n2pia creates a PatchInfoAnd representing a Named patch.
patchInfoAndPatch :: PatchInfo -> Hopefully (Named p) -> PatchInfoAnd pSource
conscientiously :: (Doc -> Doc) -> PatchInfoAnd p -> Named pSource
conscientiously er hpPatchInfoAnd.
If it fails, it applies the error handling function er to a description
of the patch info component of hp.
hopefully :: PatchInfoAnd p -> Named pSource
hopefully hpPatchInfoAnd
value. If it fails, it outputs an error "failed to read patch:
<description of the patch>". We get the description of the patch
from the info part of hp
info :: PatchInfoAnd p -> PatchInfoSource
hopefullyM :: Monad m => PatchInfoAnd p -> m (Named p)Source
hopefullyM is a version of hopefully which calls fail in a
monad instead of erroring.
extractHash :: PatchInfoAnd p -> Either (Named p) StringSource
unavailable :: String -> Hopefully aSource