module Agda.Syntax.Concrete.Definitions
( NiceDeclaration(..)
, NiceConstructor, NiceTypeSignature
, Clause(..)
, DeclarationException(..)
, Nice, runNice
, niceDeclarations
, notSoNiceDeclaration
) where
import Control.Arrow ((***))
import Control.Applicative
import Control.Monad.Error
import Control.Monad.State
import Data.Typeable (Typeable)
import Data.Foldable hiding (concatMap, mapM_, notElem, elem, all)
import qualified Data.Map as Map
import Data.Map (Map)
import Data.List as List
import Data.Traversable (traverse)
import Agda.Syntax.Concrete
import Agda.Syntax.Common hiding (Arg, Dom, NamedArg, ArgInfo)
import qualified Agda.Syntax.Common as Common
import Agda.Syntax.Position
import Agda.Syntax.Fixity
import Agda.Syntax.Notation
import Agda.Syntax.Concrete.Pretty ()
import Agda.Utils.Pretty
import Agda.Utils.List (mhead, isSublistOf)
import Agda.Utils.Monad
import Agda.Utils.Update
#include "../../undefined.h"
import Agda.Utils.Impossible
data NiceDeclaration
= Axiom Range Fixity' Access ArgInfo Name Expr
| NiceField Range Fixity' Access IsAbstract Name (Arg Expr)
| PrimitiveFunction Range Fixity' Access IsAbstract Name Expr
| NiceMutual Range TerminationCheck [NiceDeclaration]
| NiceModule Range Access IsAbstract QName Telescope [Declaration]
| NiceModuleMacro Range Access Name ModuleApplication OpenShortHand ImportDirective
| NiceOpen Range QName ImportDirective
| NiceImport Range QName (Maybe AsName) OpenShortHand ImportDirective
| NicePragma Range Pragma
| NiceRecSig Range Fixity' Access Name [LamBinding] Expr
| NiceDataSig Range Fixity' Access Name [LamBinding] Expr
| NiceFunClause Range Access IsAbstract TerminationCheck Declaration
| FunSig Range Fixity' Access ArgInfo TerminationCheck Name Expr
| FunDef Range [Declaration] Fixity' IsAbstract TerminationCheck Name [Clause]
| DataDef Range Fixity' IsAbstract Name [LamBinding] [NiceConstructor]
| RecDef Range Fixity' IsAbstract Name (Maybe (Ranged Induction)) (Maybe (ThingWithFixity Name)) [LamBinding] [NiceDeclaration]
| NicePatternSyn Range Fixity' Name [Arg Name] Pattern
deriving (Typeable, Show)
type TerminationCheck = Bool
type NiceConstructor = NiceTypeSignature
type NiceTypeSignature = NiceDeclaration
data Clause = Clause Name LHS RHS WhereClause [Clause]
deriving (Typeable, Show)
data DeclarationException
= MultipleFixityDecls [(Name, [Fixity'])]
| MissingDefinition Name
| MissingWithClauses Name
| MissingTypeSignature LHS
| MissingDataSignature Name
| WrongDefinition Name DataRecOrFun DataRecOrFun
| WrongParameters Name
| NotAllowedInMutual NiceDeclaration
| UnknownNamesInFixityDecl [Name]
| Codata Range
| DeclarationPanic String
| UselessPrivate Range
| UselessAbstract Range
| AmbiguousFunClauses LHS [Name]
| InvalidNoTerminationCheckPragma Range
deriving (Typeable)
instance HasRange DeclarationException where
getRange (MultipleFixityDecls xs) = getRange (fst $ head xs)
getRange (MissingDefinition x) = getRange x
getRange (MissingWithClauses x) = getRange x
getRange (MissingTypeSignature x) = getRange x
getRange (MissingDataSignature x) = getRange x
getRange (WrongDefinition x k k') = getRange x
getRange (WrongParameters x) = getRange x
getRange (AmbiguousFunClauses lhs xs) = getRange lhs
getRange (NotAllowedInMutual x) = getRange x
getRange (UnknownNamesInFixityDecl xs) = getRange . head $ xs
getRange (Codata r) = r
getRange (DeclarationPanic _) = noRange
getRange (UselessPrivate r) = r
getRange (UselessAbstract r) = r
getRange (InvalidNoTerminationCheckPragma r) = r
instance HasRange NiceDeclaration where
getRange (Axiom r _ _ _ _ _) = r
getRange (NiceField r _ _ _ _ _) = r
getRange (NiceMutual r _ _) = r
getRange (NiceModule r _ _ _ _ _) = r
getRange (NiceModuleMacro r _ _ _ _ _) = r
getRange (NiceOpen r _ _) = r
getRange (NiceImport r _ _ _ _) = r
getRange (NicePragma r _) = r
getRange (PrimitiveFunction r _ _ _ _ _) = r
getRange (FunSig r _ _ _ _ _ _) = r
getRange (FunDef r _ _ _ _ _ _) = r
getRange (DataDef r _ _ _ _ _) = r
getRange (RecDef r _ _ _ _ _ _ _) = r
getRange (NiceRecSig r _ _ _ _ _) = r
getRange (NiceDataSig r _ _ _ _ _) = r
getRange (NicePatternSyn r _ _ _ _) = r
getRange (NiceFunClause r _ _ _ _) = r
instance Error DeclarationException where
noMsg = strMsg ""
strMsg = DeclarationPanic
instance Show DeclarationException where
show (MultipleFixityDecls xs) = show $
sep [ fsep $ pwords "Multiple fixity declarations for"
, vcat $ map f xs
]
where
f (x, fs) = pretty x <> text ":" <+> fsep (map (text . show) fs)
show (MissingDefinition x) = show $ fsep $
pwords "Missing definition for" ++ [pretty x]
show (MissingWithClauses x) = show $ fsep $
pwords "Missing with-clauses for function" ++ [pretty x]
show (MissingTypeSignature x) = show $ fsep $
pwords "Missing type signature for left hand side" ++ [pretty x]
show (MissingDataSignature x) = show $ fsep $
pwords "Missing type signature for " ++ [pretty x]
show (WrongDefinition x k k') = show $ fsep $ pretty x :
pwords ("has been declared as a " ++ show k ++
", but is being defined as a " ++ show k')
show (WrongParameters x) = show $ fsep $
pwords "List of parameters does not match previous signature for" ++ [pretty x]
show (AmbiguousFunClauses lhs xs) = show $ fsep $
pwords "More than one matching type signature for left hand side" ++ [pretty lhs] ++
pwords "it could belong to any of:" ++ map pretty xs
show (UnknownNamesInFixityDecl xs) = show $ fsep $
pwords "Names out of scope in fixity declarations:" ++ map pretty xs
show (UselessPrivate _) = show $ fsep $
pwords "Using private here has no effect. Private applies only to declarations that introduce new identifiers into the module, like type signatures and data, record, and module declarations."
show (UselessAbstract _) = show $ fsep $
pwords "Using abstract here has no effect. Abstract applies only definitions like data definitions, record type definitions and function clauses."
show (InvalidNoTerminationCheckPragma _) = show $ fsep $
pwords "The NO_TERMINATION_CHECK pragma can only preceed a mutual block or a function definition."
show (NotAllowedInMutual nd) = show $ fsep $
[text $ decl nd] ++ pwords "are not allowed in mutual blocks"
where
decl (Axiom{}) = "Postulates"
decl (NiceField{}) = "Fields"
decl (NiceMutual{}) = "Mutual blocks"
decl (NiceModule{}) = "Modules"
decl (NiceModuleMacro{}) = "Modules"
decl (NiceOpen{}) = "Open declarations"
decl (NiceImport{}) = "Import statements"
decl (NicePragma{}) = "Pragmas"
decl (PrimitiveFunction{}) = "Primitive declarations"
decl (NicePatternSyn{}) = "Pattern synonyms"
decl _ = __IMPOSSIBLE__
show (Codata _) =
"The codata construction has been removed. " ++
"Use the INFINITY builtin instead."
show (DeclarationPanic s) = s
data InMutual
= InMutual
| NotInMutual
deriving (Eq, Show)
data DataRecOrFun
= DataName Params
| RecName Params
| FunName TerminationCheck
deriving (Eq, Ord)
type Params = [Hiding]
instance Show DataRecOrFun where
show (DataName n) = "data type"
show (RecName n) = "record type"
show (FunName{}) = "function"
isFunName :: DataRecOrFun -> Bool
isFunName (FunName{}) = True
isFunName _ = False
sameKind :: DataRecOrFun -> DataRecOrFun -> Bool
sameKind DataName{} DataName{} = True
sameKind RecName{} RecName{} = True
sameKind FunName{} FunName{} = True
sameKind _ _ = False
terminationCheck :: DataRecOrFun -> Bool
terminationCheck (FunName tc) = tc
terminationCheck _ = True
type LoneSigs = [(DataRecOrFun, Name)]
data NiceEnv = NiceEnv
{ loneSigs :: LoneSigs
, fixs :: Map Name Fixity'
}
initNiceEnv :: NiceEnv
initNiceEnv = NiceEnv
{ loneSigs = []
, fixs = Map.empty
}
type Nice = StateT NiceEnv (Either DeclarationException)
addLoneSig :: DataRecOrFun -> Name -> Nice ()
addLoneSig k x = modify $ \ niceEnv -> niceEnv { loneSigs = (k, x) : loneSigs niceEnv }
removeLoneSig :: Name -> Nice ()
removeLoneSig x = modify $ \ niceEnv ->
niceEnv { loneSigs = filter (\ (k', x') -> x /= x') $ loneSigs niceEnv }
getSig :: Name -> Nice (Maybe DataRecOrFun)
getSig n = gets $ fmap fst . List.find (\ (k, x) -> x == n) . loneSigs
noLoneSigs :: Nice Bool
noLoneSigs = gets $ null . loneSigs
checkLoneSigs :: LoneSigs -> Nice ()
checkLoneSigs xs =
case xs of
[] -> return ()
(_, x):_ -> throwError $ MissingDefinition x
getFixity :: Name -> Nice Fixity'
getFixity x = gets $ Map.findWithDefault defaultFixity' x . fixs
runNice :: Nice a -> Either DeclarationException a
runNice nice = nice `evalStateT` initNiceEnv
data DeclKind
= LoneSig DataRecOrFun Name
| LoneDef DataRecOrFun Name
| OtherDecl
deriving (Eq, Show)
declKind (FunSig _ _ _ _ tc x _) = LoneSig (FunName tc) x
declKind (NiceRecSig _ _ _ x pars _) = LoneSig (RecName $ parameters pars) x
declKind (NiceDataSig _ _ _ x pars _) = LoneSig (DataName $ parameters pars) x
declKind (FunDef _ _ _ _ tc x _) = LoneDef (FunName tc) x
declKind (DataDef _ _ _ x pars _) = LoneDef (DataName $ parameters pars) x
declKind (RecDef _ _ _ x _ _ pars _) = LoneDef (RecName $ parameters pars) x
declKind _ = OtherDecl
parameters :: [LamBinding] -> Params
parameters = List.concat . List.map numP where
numP (DomainFree i _) = [argInfoHiding i]
numP (DomainFull (TypedBindings _ (Common.Arg i (TBind _ xs _)))) = List.replicate (length xs) $ argInfoHiding i
numP (DomainFull (TypedBindings _ (Common.Arg _ TLet{}))) = []
niceDeclarations :: [Declaration] -> Nice [NiceDeclaration]
niceDeclarations ds = do
fixs <- fixities ds
case Map.keys fixs \\ concatMap declaredNames ds of
[] -> localState $ do
put $ initNiceEnv { fixs = fixs }
ds <- nice ds
checkLoneSigs =<< gets loneSigs
modify $ \s -> s { loneSigs = [] }
inferMutualBlocks ds
xs -> throwError $ UnknownNamesInFixityDecl xs
where
declaredNames :: Declaration -> [Name]
declaredNames d = case d of
TypeSig _ x _ -> [x]
Field x _ -> [x]
FunClause (LHS p [] [] []) _ _
| IdentP (QName x) <- removeSingletonRawAppP p -> [x]
FunClause{} -> []
DataSig _ _ x _ _ -> [x]
Data _ _ x _ _ cs -> x : concatMap declaredNames cs
RecordSig _ x _ _ -> [x]
Record _ x _ c _ _ _ -> x : foldMap (:[]) c
Infix _ _ -> []
Syntax _ _ -> []
PatternSyn _ x _ _ -> [x]
Mutual _ ds -> concatMap declaredNames ds
Abstract _ ds -> concatMap declaredNames ds
Private _ ds -> concatMap declaredNames ds
Postulate _ ds -> concatMap declaredNames ds
Primitive _ ds -> concatMap declaredNames ds
Open{} -> []
Import{} -> []
ModuleMacro{} -> []
Module{} -> []
Pragma{} -> []
inferMutualBlocks :: [NiceDeclaration] -> Nice [NiceDeclaration]
inferMutualBlocks [] = return []
inferMutualBlocks (d : ds) =
case declKind d of
OtherDecl -> (d :) <$> inferMutualBlocks ds
LoneDef _ x -> __IMPOSSIBLE__
LoneSig k x -> do
addLoneSig k x
(tc, (ds0, ds1)) <- untilAllDefined (terminationCheck k) ds
let prefix = case (d, ds0) of
(NiceRecSig{}, [r@RecDef{}]) -> ([d, r] ++)
_ ->
(NiceMutual (getRange (d : ds0)) tc (d : ds0) :)
prefix <$> inferMutualBlocks ds1
where
untilAllDefined :: TerminationCheck
-> [NiceDeclaration]
-> Nice (TerminationCheck, ([NiceDeclaration], [NiceDeclaration]))
untilAllDefined tc ds = do
done <- noLoneSigs
if done then return (tc, ([], ds)) else
case ds of
[] -> __IMPOSSIBLE__ <$ (checkLoneSigs =<< gets loneSigs)
d : ds -> case declKind d of
LoneSig k x -> addLoneSig k x >> cons d (untilAllDefined (tc && terminationCheck k) ds)
LoneDef k x -> removeLoneSig x >> cons d (untilAllDefined (tc && terminationCheck k) ds)
OtherDecl -> cons d (untilAllDefined tc ds)
where
cons d = fmap (id *** (d :) *** id)
nice :: [Declaration] -> Nice [NiceDeclaration]
nice [] = return []
nice (Pragma (NoTerminationCheckPragma r) : ds@(Mutual{} : _)) = do
ds <- nice ds
case ds of
NiceMutual r _ ds' : ds -> return $ NiceMutual r False ds' : ds
_ -> __IMPOSSIBLE__
nice (Pragma (NoTerminationCheckPragma r) : d@TypeSig{} : ds) =
niceTypeSig False d ds
nice (Pragma (NoTerminationCheckPragma r) : d@FunClause{} : ds) =
niceFunClause False d ds
nice (d:ds) = do
case d of
TypeSig{} -> niceTypeSig True d ds
FunClause{} -> niceFunClause True d ds
Field x t -> (++) <$> niceAxioms [ d ] <*> nice ds
DataSig r CoInductive x tel t -> throwError (Codata r)
Data r CoInductive x tel t cs -> throwError (Codata r)
DataSig r Inductive x tel t -> do
addLoneSig (DataName $ parameters tel) x
(++) <$> dataOrRec DataDef NiceDataSig niceAxioms r x tel (Just t) Nothing
<*> nice ds
Data r Inductive x tel t cs -> do
t <- defaultTypeSig (DataName $ parameters tel) x t
(++) <$> dataOrRec DataDef NiceDataSig niceAxioms r x tel t (Just cs)
<*> nice ds
RecordSig r x tel t -> do
addLoneSig (RecName $ parameters tel) x
fx <- getFixity x
(NiceRecSig r fx PublicAccess x tel t :) <$> nice ds
Record r x i c tel t cs -> do
t <- defaultTypeSig (RecName $ parameters tel) x t
c <- traverse (\c -> ThingWithFixity c <$> getFixity c) c
(++) <$> dataOrRec (\x1 x2 x3 x4 -> RecDef x1 x2 x3 x4 i c) NiceRecSig
niceDeclarations r x tel t (Just cs)
<*> nice ds
Mutual r ds' ->
(:) <$> (mkOldMutual r =<< nice ds') <*> nice ds
Abstract r ds' ->
(++) <$> (abstractBlock r =<< nice ds') <*> nice ds
Private r ds' ->
(++) <$> (privateBlock r =<< nice ds') <*> nice ds
Postulate _ ds' -> (++) <$> niceAxioms ds' <*> nice ds
Primitive _ ds' -> (++) <$> (map toPrim <$> niceAxioms ds') <*> nice ds
Module r x tel ds' ->
(NiceModule r PublicAccess ConcreteDef x tel ds' :) <$> nice ds
ModuleMacro r x modapp op is ->
(NiceModuleMacro r PublicAccess x modapp op is :)
<$> nice ds
Infix _ _ -> nice ds
Syntax _ _ -> nice ds
PatternSyn r n as p -> do
fx <- getFixity n
(NicePatternSyn r fx n as p :) <$> nice ds
Open r x is -> (NiceOpen r x is :) <$> nice ds
Import r x as op is -> (NiceImport r x as op is :) <$> nice ds
Pragma (NoTerminationCheckPragma r) ->
throwError $ InvalidNoTerminationCheckPragma r
Pragma p -> (NicePragma (getRange p) p :) <$> nice ds
niceFunClause :: TerminationCheck -> Declaration -> [Declaration] -> Nice [NiceDeclaration]
niceFunClause termCheck d@(FunClause lhs _ _) ds = do
xs <- gets $ map snd . filter (isFunName . fst) . loneSigs
fixs <- gets fixs
case [ (x, (fits, rest))
| x <- xs
, let (fits, rest) =
span (couldBeFunClauseOf (Map.lookup x fixs) x) (d : ds)
, not (null fits)
] of
[] -> case lhs of
LHS p [] [] [] | IdentP (QName x) <- removeSingletonRawAppP p -> do
ds <- nice ds
d <- mkFunDef defaultArgInfo termCheck x Nothing [d]
return $ d ++ ds
_ -> do
ds <- nice ds
return $ NiceFunClause (getRange d) PublicAccess ConcreteDef termCheck d : ds
[(x,(fits,rest))] -> do
removeLoneSig x
cs <- mkClauses x $ expandEllipsis fits
ds1 <- nice rest
fx <- getFixity x
d <- return $ FunDef (getRange fits) fits fx ConcreteDef termCheck x cs
return $ d : ds1
l -> throwError $ AmbiguousFunClauses lhs (map fst l)
niceFunClause _ _ _ = __IMPOSSIBLE__
niceTypeSig :: TerminationCheck -> Declaration -> [Declaration] -> Nice [NiceDeclaration]
niceTypeSig termCheck d@(TypeSig info x t) ds = do
fx <- getFixity x
addLoneSig (FunName termCheck) x
ds <- nice ds
return $ FunSig (getRange d) fx PublicAccess info termCheck x t : ds
niceTypeSig _ _ _ = __IMPOSSIBLE__
defaultTypeSig :: DataRecOrFun -> Name -> Maybe Expr -> Nice (Maybe Expr)
defaultTypeSig k x t@Just{} = return t
defaultTypeSig k x Nothing = do
mk <- getSig x
case mk of
Nothing -> throwError $ MissingDataSignature x
Just k' | k == k' -> Nothing <$ removeLoneSig x
| sameKind k k' -> throwError $ WrongParameters x
| otherwise -> throwError $ WrongDefinition x k' k
dataOrRec mkDef mkSig niceD r x tel mt mcs = do
mds <- traverse niceD mcs
f <- getFixity x
return $
[mkSig (fuseRange x t) f PublicAccess x tel t | Just t <- [mt] ] ++
[mkDef (getRange x) f ConcreteDef x (concatMap dropType tel) ds | Just ds <- [mds] ]
where
dropType (DomainFull (TypedBindings r (Common.Arg i (TBind _ xs _)))) =
map (DomainFree i) xs
dropType (DomainFull (TypedBindings _ (Common.Arg _ TLet{}))) = []
dropType b@DomainFree{} = [b]
niceAxioms :: [TypeSignature] -> Nice [NiceDeclaration]
niceAxioms ds = mapM niceAxiom ds
niceAxiom :: TypeSignature -> Nice NiceDeclaration
niceAxiom d@(TypeSig rel x t) = do
fx <- getFixity x
return $ Axiom (getRange d) fx PublicAccess rel x t
niceAxiom d@(Field x argt) = do
fx <- getFixity x
return $ NiceField (getRange d) fx PublicAccess ConcreteDef x argt
niceAxiom _ = __IMPOSSIBLE__
toPrim :: NiceDeclaration -> NiceDeclaration
toPrim (Axiom r f a rel x t) = PrimitiveFunction r f a ConcreteDef x t
toPrim _ = __IMPOSSIBLE__
mkFunDef info termCheck x mt ds0 = do
cs <- mkClauses x $ expandEllipsis ds0
f <- getFixity x
return [ FunSig (fuseRange x t) f PublicAccess info termCheck x t
, FunDef (getRange ds0) ds0 f ConcreteDef termCheck x cs ]
where
t = case mt of
Just t -> t
Nothing -> underscore (getRange x)
underscore r = Underscore r Nothing
expandEllipsis :: [Declaration] -> [Declaration]
expandEllipsis [] = []
expandEllipsis (d@(FunClause Ellipsis{} _ _) : ds) =
d : expandEllipsis ds
expandEllipsis (d@(FunClause lhs@(LHS p ps _ _) _ _) : ds) =
d : expand p ps ds
where
expand _ _ [] = []
expand p ps (FunClause (Ellipsis _ ps' eqs []) rhs wh : ds) =
FunClause (LHS p (ps ++ ps') eqs []) rhs wh : expand p ps ds
expand p ps (FunClause (Ellipsis _ ps' eqs es) rhs wh : ds) =
FunClause (LHS p (ps ++ ps') eqs es) rhs wh : expand p (ps ++ ps') ds
expand p ps (d@(FunClause (LHS _ _ _ []) _ _) : ds) =
d : expand p ps ds
expand _ _ (d@(FunClause (LHS p ps _ (_ : _)) _ _) : ds) =
d : expand p ps ds
expand _ _ (_ : ds) = __IMPOSSIBLE__
expandEllipsis (_ : ds) = __IMPOSSIBLE__
mkClauses :: Name -> [Declaration] -> Nice [Clause]
mkClauses _ [] = return []
mkClauses x (FunClause lhs@(LHS _ _ _ []) rhs wh : cs) =
(Clause x lhs rhs wh [] :) <$> mkClauses x cs
mkClauses x (FunClause lhs@(LHS _ ps _ es) rhs wh : cs) = do
when (null with) $ throwError $ MissingWithClauses x
wcs <- mkClauses x with
(Clause x lhs rhs wh wcs :) <$> mkClauses x cs'
where
(with, cs') = span subClause cs
subClause (FunClause (LHS _ ps' _ _) _ _) =
length ps' >= length ps + length es
subClause (FunClause (Ellipsis _ ps' _ _) _ _) = True
subClause _ = __IMPOSSIBLE__
mkClauses x (FunClause lhs@Ellipsis{} rhs wh : cs) =
(Clause x lhs rhs wh [] :) <$> mkClauses x cs
mkClauses _ _ = __IMPOSSIBLE__
couldBeFunClauseOf :: Maybe Fixity' -> Name -> Declaration -> Bool
couldBeFunClauseOf mFixity x (FunClause Ellipsis{} _ _) = True
couldBeFunClauseOf mFixity x (FunClause (LHS p _ _ _) _ _) =
let
pns = patternNames p
xStrings = nameStringParts x
patStrings = concatMap nameStringParts pns
in
case (mhead pns, mFixity) of
(Just y, _) | x == y -> True
_ | xStrings `isSublistOf` patStrings -> True
(_, Just fix) ->
let notStrings = stringParts (theNotation fix)
in
(not $ null notStrings) && (notStrings `isSublistOf` patStrings)
_ -> False
couldBeFunClauseOf _ _ _ = False
removeSingletonRawAppP :: Pattern -> Pattern
removeSingletonRawAppP (RawAppP _ [p]) = removeSingletonRawAppP p
removeSingletonRawAppP p = p
mkOldMutual :: Range -> [NiceDeclaration] -> Nice NiceDeclaration
mkOldMutual r ds = do
checkLoneSigs loneNames
case filter notAllowedInMutual ds of
[] -> return ()
(NiceFunClause _ _ _ _ (FunClause lhs _ _)):_ -> throwError $ MissingTypeSignature lhs
d:_ -> throwError $ NotAllowedInMutual d
return $ NiceMutual r (all termCheck ds) $ sigs ++ other
where
notAllowedInMutual Axiom{} = False
notAllowedInMutual d = declKind d == OtherDecl
(sigs, other) = partition isTypeSig ds
isTypeSig Axiom{} = True
isTypeSig d | LoneSig{} <- declKind d = True
isTypeSig _ = False
sigNames = [ (k, x) | LoneSig k x <- map declKind ds ]
defNames = [ (k, x) | LoneDef k x <- map declKind ds ]
loneNames = [ (k, x) | (k, x) <- sigNames, List.all ((x /=) . snd) defNames ]
termCheck (FunSig _ _ _ _ tc _ _) = tc
termCheck (FunDef _ _ _ _ tc _ _) = tc
termCheck (NiceMutual _ tc _) = tc
termCheck _ = True
abstractBlock _ [] = return []
abstractBlock r ds = do
let (ds', anyChange) = runChange $ mapM mkAbstract ds
inherited = r == noRange
if anyChange || inherited then return ds' else throwError $ UselessAbstract r
mkAbstract :: Updater NiceDeclaration
mkAbstract d =
case d of
NiceMutual r termCheck ds -> NiceMutual r termCheck <$> mapM mkAbstract ds
FunDef r ds f a tc x cs -> (\ a -> FunDef r ds f a tc x) <$> setAbstract a <*> mapM mkAbstractClause cs
DataDef r f a x ps cs -> (\ a -> DataDef r f a x ps) <$> setAbstract a <*> mapM mkAbstract cs
RecDef r f a x i c ps cs -> (\ a -> RecDef r f a x i c ps) <$> setAbstract a <*> mapM mkAbstract cs
NiceFunClause r p a termCheck d -> (\ a -> NiceFunClause r p a termCheck d) <$> setAbstract a
NiceField r f p _ x e -> return $ NiceField r f p AbstractDef x e
PrimitiveFunction r f p _ x e -> return $ PrimitiveFunction r f p AbstractDef x e
NiceModule{} -> return $ d
NiceModuleMacro{} -> return $ d
Axiom{} -> return $ d
NicePragma{} -> return $ d
NiceOpen{} -> return $ d
NiceImport{} -> return $ d
FunSig{} -> return $ d
NiceRecSig{} -> return $ d
NiceDataSig{} -> return $ d
NicePatternSyn{} -> return $ d
setAbstract :: Updater IsAbstract
setAbstract a = case a of
AbstractDef -> return a
ConcreteDef -> dirty $ AbstractDef
mkAbstractClause :: Updater Clause
mkAbstractClause (Clause x lhs rhs wh with) = do
wh <- mkAbstractWhere wh
Clause x lhs rhs wh <$> mapM mkAbstractClause with
mkAbstractWhere :: Updater WhereClause
mkAbstractWhere NoWhere = return $ NoWhere
mkAbstractWhere (AnyWhere ds) = dirty $ AnyWhere [Abstract noRange ds]
mkAbstractWhere (SomeWhere m ds) = dirty $SomeWhere m [Abstract noRange ds]
privateBlock _ [] = return []
privateBlock r ds = do
let (ds', anyChange) = runChange $ mapM mkPrivate ds
if anyChange then return ds' else throwError $ UselessPrivate r
mkPrivate :: Updater NiceDeclaration
mkPrivate d =
case d of
Axiom r f p rel x e -> (\ p -> Axiom r f p rel x e) <$> setPrivate p
NiceField r f p a x e -> (\ p -> NiceField r f p a x e) <$> setPrivate p
PrimitiveFunction r f p a x e -> (\ p -> PrimitiveFunction r f p a x e) <$> setPrivate p
NiceMutual r termCheck ds -> NiceMutual r termCheck <$> mapM mkPrivate ds
NiceModule r p a x tel ds -> (\ p -> NiceModule r p a x tel ds) <$> setPrivate p
NiceModuleMacro r p x ma op is -> (\ p -> NiceModuleMacro r p x ma op is) <$> setPrivate p
FunSig r f p rel tc x e -> (\ p -> FunSig r f p rel tc x e) <$> setPrivate p
NiceRecSig r f p x ls t -> (\ p -> NiceRecSig r f p x ls t) <$> setPrivate p
NiceDataSig r f p x ls t -> (\ p -> NiceDataSig r f p x ls t) <$> setPrivate p
NiceFunClause r p a termCheck d -> (\ p -> NiceFunClause r p a termCheck d) <$> setPrivate p
NicePragma _ _ -> return $ d
NiceOpen _ _ _ -> return $ d
NiceImport _ _ _ _ _ -> return $ d
FunDef{} -> return $ d
DataDef{} -> return $ d
RecDef{} -> return $ d
NicePatternSyn _ _ _ _ _ -> return $ d
setPrivate :: Updater Access
setPrivate p = case p of
PrivateAccess -> return p
_ -> dirty $ PrivateAccess
mkPrivateClause :: Updater Clause
mkPrivateClause (Clause x lhs rhs wh with) = do
wh <- mkPrivateWhere wh
Clause x lhs rhs wh <$> mapM mkPrivateClause with
mkPrivateWhere :: Updater WhereClause
mkPrivateWhere NoWhere = return $ NoWhere
mkPrivateWhere (AnyWhere ds) = dirty $ AnyWhere [Private (getRange ds) ds]
mkPrivateWhere (SomeWhere m ds) = dirty $ SomeWhere m [Private (getRange ds) ds]
plusFixities :: Map.Map Name Fixity' -> Map.Map Name Fixity' -> Nice (Map.Map Name Fixity')
plusFixities m1 m2
| not (null isect) = throwError $ MultipleFixityDecls isect
| otherwise = return $ Map.unionWithKey mergeFixites m1 m2
where mergeFixites name (Fixity' f1 s1) (Fixity' f2 s2) = Fixity' f s
where f | f1 == noFixity = f2
| f2 == noFixity = f1
| otherwise = __IMPOSSIBLE__
s | s1 == noNotation = s2
| s2 == noNotation = s1
| otherwise = __IMPOSSIBLE__
isect = [decls x | (x,compat) <- Map.assocs (Map.intersectionWith compatible m1 m2), not compat]
decls x = (x, map (Map.findWithDefault __IMPOSSIBLE__ x) [m1,m2])
compatible (Fixity' f1 s1) (Fixity' f2 s2) = (f1 == noFixity || f2 == noFixity) &&
(s1 == noNotation || s2 == noNotation)
fixities :: [Declaration] -> Nice (Map.Map Name Fixity')
fixities (d:ds) = case d of
Syntax x syn -> plusFixities (Map.singleton x (Fixity' noFixity syn)) =<< fixities ds
Infix f xs -> plusFixities (Map.fromList [ (x,Fixity' f noNotation) | x <- xs ]) =<< fixities ds
Mutual _ ds' -> fixities (ds' ++ ds)
Abstract _ ds' -> fixities (ds' ++ ds)
Private _ ds' -> fixities (ds' ++ ds)
_ -> fixities ds
fixities [] = return $ Map.empty
notSoNiceDeclaration :: NiceDeclaration -> Declaration
notSoNiceDeclaration d =
case d of
Axiom _ _ _ rel x e -> TypeSig rel x e
NiceField _ _ _ _ x argt -> Field x argt
PrimitiveFunction r _ _ _ x e -> Primitive r [TypeSig defaultArgInfo x e]
NiceMutual r _ ds -> Mutual r $ map notSoNiceDeclaration ds
NiceModule r _ _ x tel ds -> Module r x tel ds
NiceModuleMacro r _ x ma o dir -> ModuleMacro r x ma o dir
NiceOpen r x dir -> Open r x dir
NiceImport r x as o dir -> Import r x as o dir
NicePragma _ p -> Pragma p
NiceRecSig r _ _ x bs e -> RecordSig r x bs e
NiceDataSig r _ _ x bs e -> DataSig r Inductive x bs e
NiceFunClause _ _ _ _ d -> d
FunSig _ _ _ rel tc x e -> TypeSig rel x e
FunDef r [d] _ _ _ _ _ -> d
FunDef r ds _ _ _ _ _ -> Mutual r ds
DataDef r _ _ x bs cs -> Data r Inductive x bs Nothing $ map notSoNiceDeclaration cs
RecDef r _ _ x i c bs ds -> Record r x i (unThing <$> c) bs Nothing $ map notSoNiceDeclaration ds
where unThing (ThingWithFixity c _) = c
NicePatternSyn r _ n as p -> PatternSyn r n as p