diff options
| author | krasimir <krasimir@chalmers.se> | 2008-05-29 10:55:34 +0000 |
|---|---|---|
| committer | krasimir <krasimir@chalmers.se> | 2008-05-29 10:55:34 +0000 |
| commit | 64d3a1226da712bcf3c2744bcc141ebd40acac27 (patch) | |
| tree | 3427929509359f7ea1cf9c3e7f13a7b3a9fecf8c /src-3.0/GF/Formalism/Utilities.hs | |
| parent | 45e1eedff34f11a1e267d1e8923c12a33c7a217a (diff) | |
simplify the Profile type and remove the NameProfile type
Diffstat (limited to 'src-3.0/GF/Formalism/Utilities.hs')
| -rw-r--r-- | src-3.0/GF/Formalism/Utilities.hs | 70 |
1 files changed, 0 insertions, 70 deletions
diff --git a/src-3.0/GF/Formalism/Utilities.hs b/src-3.0/GF/Formalism/Utilities.hs index d1826d095..ea1f1eeca 100644 --- a/src-3.0/GF/Formalism/Utilities.hs +++ b/src-3.0/GF/Formalism/Utilities.hs @@ -309,66 +309,6 @@ forest2trees (FMeta) = [TMeta] ---------------------------------------------------------------------- -- * profiles --- | Pairing a rule name with a profile -data NameProfile a = Name a [Profile (SyntaxForest a)] - deriving (Eq, Ord, Show) - -name2fun :: NameProfile a -> a -name2fun (Name fun _) = fun - --- | A profile is a simple representation of a function on a number of arguments. --- We only use lists of profiles -data Profile a = Unify [Int] -- ^ The Int's are the argument positions. - -- 'Unify []' will become a metavariable, - -- 'Unify [a,b]' means that the arguments are equal, - | Constant a - deriving (Eq, Ord, Show) - -instance Functor Profile where - fmap f (Constant a) = Constant (f a) - fmap f (Unify xs) = Unify xs - --- | a function name where the profile does not contain arguments --- (i.e. denoting a constant, not a function) -constantNameToForest :: NameProfile a -> SyntaxForest a -constantNameToForest name@(Name fun profile) = FNode fun [map unConstant profile] - where unConstant (Constant a) = a - unConstant (Unify []) = FMeta - unConstant _ = error $ "constantNameToForest: the profile should not contain arguments" - --- | profile application; we need some way of unifying a list of arguments -applyProfile :: ([b] -> a) -> [Profile a] -> [b] -> [a] -applyProfile unify profile args = map apply profile - where apply (Unify xs) = unify $ map (args !!) xs - apply (Constant a) = a - --- | monadic profile application -applyProfileM :: Monad m => ([b] -> m a) -> [Profile a] -> [b] -> m [a] -applyProfileM unify profile args = mapM apply profile - where apply (Unify xs) = unify $ map (args !!) xs - apply (Constant a) = return a - --- | profile composition: --- --- > applyProfile u z (ps `composeProfiles` qs) args --- > == --- > applyProfile u z ps (applyProfile u z qs args) --- --- compare with function composition --- --- > (p . q) arg --- > == --- > p (q arg) --- --- Note that composing an 'Constant' with two or more arguments returns an error --- (since 'Unify' can only take arguments) -- this might change in the future, if there is a need. -composeProfiles :: [Profile a] -> [Profile a] -> [Profile a] -composeProfiles ps qs = map compose ps - where compose (Unify [x]) = qs !! x - compose (Unify xs) = Unify [ y | x <- xs, let Unify ys = qs !! x, y <- ys ] - compose constant = constant - - ------------------------------------------------------------ -- pretty-printing @@ -411,13 +351,3 @@ instance (Print s) => Print (SyntaxForest s) where prt (FFloat f) = show f prt (FMeta) = "?" prtList = prtAfter "\n" - -instance Print a => Print (Profile a) where - prt (Unify []) = "?" - prt (Unify args) = prtSep "=" args - prt (Constant a) = prt a - -instance Print a => Print (NameProfile a) where - prt (Name fun profile) = prt fun ++ prt profile - - |
