idris-1.3.4: Functional Programming Language with Dependent Types

License | BSD3
Maintainer | The Idris Community.
Safe Haskell | None
Language | Haskell2010

Idris.Core.CaseTree

Description

in other words, it never inspects anything else than variables.

ProjCase is a special powerful case construct that allows inspection of compound terms. Occurrences of ProjCase arise no earlier than in the function `prune` as a means of optimisation of already built case trees.

While the intermediate representation (follows in the pipeline, named LExp) allows casing on arbitrary terms, here we choose to maintain the distinction in order to allow for better optimisation opportunities.

Synopsis

- data CaseDef = CaseDef [Name] !SC [Term]
- type SC = SC' Term
- data SC' t
  - = Case CaseType Name [CaseAlt' t]
  - | ProjCase t [CaseAlt' t]
  - | STerm !t
  - | UnmatchedCase String
  - | ImpossibleCase
- type CaseAlt = CaseAlt' Term
- data CaseAlt' t
  - = ConCase Name Int [Name] !(SC' t)
  - | FnCase Name [Name] !(SC' t)
  - | ConstCase Const !(SC' t)
  - | SucCase Name !(SC' t)
  - | DefaultCase !(SC' t)
- type ErasureInfo = Name -> [Int]
- data Phase
  - = CoverageCheck [Int]
  - | CompileTime
  - | RunTime
- type CaseTree = SC
- data CaseType
  - = Updatable
  - | Shared
- simpleCase :: Bool -> SC -> Bool -> Phase -> FC -> [Int] -> [(Type, Bool)] -> [([Name], Term, Term)] -> ErasureInfo -> TC CaseDef
- small :: Name -> [Name] -> SC -> Bool
- namesUsed :: SC -> [Name]
- findCalls :: SC -> [Name] -> [(Name, [[Name]])]
- findCalls' :: Bool -> SC -> [Name] -> [(Name, [[Name]])]
- findUsedArgs :: SC -> [Name] -> [Name]
- substSC :: Name -> Name -> SC -> SC
- substAlt :: Name -> Name -> CaseAlt -> CaseAlt
- mkForce :: Name -> Name -> SC -> SC

# Documentation

data CaseDef #

Constructors

CaseDef [Name] !SC [Term] |

#### Instances

Instances details

Show CaseDef # |
Instance details Defined in Idris.Core.CaseTree Methods showsPrec :: Int -> CaseDef -> ShowS # show :: CaseDef -> String # showList :: [CaseDef] -> ShowS #

type SC = SC' Term #

data SC' t #

Constructors

Case CaseType Name [CaseAlt' t] | invariant: lowest tags first
ProjCase t [CaseAlt' t] | special case for projections/thunk-forcing before inspection
STerm !t |
UnmatchedCase String | error message
ImpossibleCase | already checked to be impossible

#### Instances

Instances details

Binary SC # |
Instance details Defined in Idris.IBC Methods put :: SC -> Put # get :: Get SC # putList :: [SC] -> Put #
Functor SC' # |
Instance details Defined in Idris.Core.CaseTree Methods fmap :: (a -> b) -> SC' a -> SC' b # (<$) :: a -> SC' b -> SC' a #
TermSize SC # |
Instance details Defined in Idris.Core.CaseTree Methods termsize :: Name -> SC -> Int #
ToJSON t => ToJSON (SC' t) # |
Instance details Defined in IRTS.Portable Methods toJSON :: SC' t -> Value # toEncoding :: SC' t -> Encoding # toJSONList :: [SC' t] -> Value # toEncodingList :: [SC' t] -> Encoding # omitField :: SC' t -> Bool #
NFData t => NFData (SC' t) # |
Instance details Defined in Idris.Core.DeepSeq Methods rnf :: SC' t -> () #
Generic (SC' t) # |
Instance details Defined in Idris.Core.CaseTree Associated Types
type Rep (SC' t) |
Instance details Defined in Idris.Core.CaseTree type Rep (SC' t) = D1 ('MetaData "SC'" "Idris.Core.CaseTree" "idris-1.3.4-CzetPXHz9szL2e7hoCyB4A" 'False) ((C1 ('MetaCons "Case" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 CaseType) :*: (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 Name) :*: S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 [CaseAlt' t]))) :+: C1 ('MetaCons "ProjCase" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 t) :*: S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 [CaseAlt' t]))) :+: (C1 ('MetaCons "STerm" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 t)) :+: (C1 ('MetaCons "UnmatchedCase" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 String)) :+: C1 ('MetaCons "ImpossibleCase" 'PrefixI 'False) (U1 :: Type -> Type))))
Methods from :: SC' t -> Rep (SC' t) x # to :: Rep (SC' t) x -> SC' t #
Show t => Show (SC' t) # |
Instance details Defined in Idris.Core.CaseTree Methods showsPrec :: Int -> SC' t -> ShowS # show :: SC' t -> String # showList :: [SC' t] -> ShowS #
Eq t => Eq (SC' t) # |
Instance details Defined in Idris.Core.CaseTree Methods (==) :: SC' t -> SC' t -> Bool # (/=) :: SC' t -> SC' t -> Bool #
Ord t => Ord (SC' t) # |
Instance details Defined in Idris.Core.CaseTree Methods compare :: SC' t -> SC' t -> Ordering # (<) :: SC' t -> SC' t -> Bool # (<=) :: SC' t -> SC' t -> Bool # (>) :: SC' t -> SC' t -> Bool # (>=) :: SC' t -> SC' t -> Bool # max :: SC' t -> SC' t -> SC' t # min :: SC' t -> SC' t -> SC' t #
type Rep (SC' t) # |
Instance details Defined in Idris.Core.CaseTree type Rep (SC' t) = D1 ('MetaData "SC'" "Idris.Core.CaseTree" "idris-1.3.4-CzetPXHz9szL2e7hoCyB4A" 'False) ((C1 ('MetaCons "Case" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 CaseType) :*: (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 Name) :*: S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 [CaseAlt' t]))) :+: C1 ('MetaCons "ProjCase" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 t) :*: S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 [CaseAlt' t]))) :+: (C1 ('MetaCons "STerm" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 t)) :+: (C1 ('MetaCons "UnmatchedCase" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 String)) :+: C1 ('MetaCons "ImpossibleCase" 'PrefixI 'False) (U1 :: Type -> Type))))

type CaseAlt = CaseAlt' Term #

data CaseAlt' t #

Constructors

ConCase Name Int [Name] !(SC' t) |
FnCase Name [Name] !(SC' t) | reflection function
ConstCase Const !(SC' t) |
SucCase Name !(SC' t) |
DefaultCase !(SC' t) |

#### Instances

Instances details

Binary CaseAlt # |
Instance details Defined in Idris.IBC Methods put :: CaseAlt -> Put # get :: Get CaseAlt # putList :: [CaseAlt] -> Put #
Functor CaseAlt' # |
Instance details Defined in Idris.Core.CaseTree Methods fmap :: (a -> b) -> CaseAlt' a -> CaseAlt' b # (<$) :: a -> CaseAlt' b -> CaseAlt' a #
TermSize CaseAlt # |
Instance details Defined in Idris.Core.CaseTree Methods termsize :: Name -> CaseAlt -> Int #
ToJSON t => ToJSON (CaseAlt' t) # |
Instance details Defined in IRTS.Portable Methods toJSON :: CaseAlt' t -> Value # toEncoding :: CaseAlt' t -> Encoding # toJSONList :: [CaseAlt' t] -> Value # toEncodingList :: [CaseAlt' t] -> Encoding # omitField :: CaseAlt' t -> Bool #
NFData t => NFData (CaseAlt' t) # |
Instance details Defined in Idris.Core.DeepSeq Methods rnf :: CaseAlt' t -> () #
Generic (CaseAlt' t) # |
Instance details Defined in Idris.Core.CaseTree Associated Types
type Rep (CaseAlt' t) |
Instance details Defined in Idris.Core.CaseTree type Rep (CaseAlt' t) = D1 ('MetaData "CaseAlt'" "Idris.Core.CaseTree" "idris-1.3.4-CzetPXHz9szL2e7hoCyB4A" 'False) ((C1 ('MetaCons "ConCase" 'PrefixI 'False) ((S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 Name) :*: S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 Int)) :*: (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 [Name]) :*: S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 (SC' t)))) :+: C1 ('MetaCons "FnCase" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 Name) :*: (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 [Name]) :*: S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 (SC' t))))) :+: (C1 ('MetaCons "ConstCase" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 Const) :*: S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 (SC' t))) :+: (C1 ('MetaCons "SucCase" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 Name) :*: S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 (SC' t))) :+: C1 ('MetaCons "DefaultCase" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 (SC' t))))))
Methods from :: CaseAlt' t -> Rep (CaseAlt' t) x # to :: Rep (CaseAlt' t) x -> CaseAlt' t #
Show t => Show (CaseAlt' t) # |
Instance details Defined in Idris.Core.CaseTree Methods showsPrec :: Int -> CaseAlt' t -> ShowS # show :: CaseAlt' t -> String # showList :: [CaseAlt' t] -> ShowS #
Eq t => Eq (CaseAlt' t) # |
Instance details Defined in Idris.Core.CaseTree Methods (==) :: CaseAlt' t -> CaseAlt' t -> Bool # (/=) :: CaseAlt' t -> CaseAlt' t -> Bool #
Ord t => Ord (CaseAlt' t) # |
Instance details Defined in Idris.Core.CaseTree Methods compare :: CaseAlt' t -> CaseAlt' t -> Ordering # (<) :: CaseAlt' t -> CaseAlt' t -> Bool # (<=) :: CaseAlt' t -> CaseAlt' t -> Bool # (>) :: CaseAlt' t -> CaseAlt' t -> Bool # (>=) :: CaseAlt' t -> CaseAlt' t -> Bool # max :: CaseAlt' t -> CaseAlt' t -> CaseAlt' t # min :: CaseAlt' t -> CaseAlt' t -> CaseAlt' t #
type Rep (CaseAlt' t) # |
Instance details Defined in Idris.Core.CaseTree type Rep (CaseAlt' t) = D1 ('MetaData "CaseAlt'" "Idris.Core.CaseTree" "idris-1.3.4-CzetPXHz9szL2e7hoCyB4A" 'False) ((C1 ('MetaCons "ConCase" 'PrefixI 'False) ((S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 Name) :*: S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 Int)) :*: (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 [Name]) :*: S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 (SC' t)))) :+: C1 ('MetaCons "FnCase" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 Name) :*: (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 [Name]) :*: S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 (SC' t))))) :+: (C1 ('MetaCons "ConstCase" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 Const) :*: S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 (SC' t))) :+: (C1 ('MetaCons "SucCase" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 Name) :*: S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 (SC' t))) :+: C1 ('MetaCons "DefaultCase" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 (SC' t))))))

type ErasureInfo = Name -> [Int] #

data Phase #

Constructors

CoverageCheck [Int] |
CompileTime |
RunTime |

#### Instances

Instances details

Show Phase # |
Instance details Defined in Idris.Core.CaseTree Methods showsPrec :: Int -> Phase -> ShowS # show :: Phase -> String # showList :: [Phase] -> ShowS #
Eq Phase # |
Instance details Defined in Idris.Core.CaseTree Methods (==) :: Phase -> Phase -> Bool # (/=) :: Phase -> Phase -> Bool #

type CaseTree = SC #

data CaseType #

Constructors

Updatable |
Shared |

#### Instances

Instances details

ToJSON CaseType # |
Instance details Defined in IRTS.Portable Methods toJSON :: CaseType -> Value # toEncoding :: CaseType -> Encoding # toJSONList :: [CaseType] -> Value # toEncodingList :: [CaseType] -> Encoding # omitField :: CaseType -> Bool #
Binary CaseType # |
Instance details Defined in Idris.IBC Methods put :: CaseType -> Put # get :: Get CaseType # putList :: [CaseType] -> Put #
NFData CaseType # |
Instance details Defined in Idris.Core.DeepSeq Methods rnf :: CaseType -> () #
Data CaseType # |
Instance details Defined in IRTS.JavaScript.LangTransforms Methods gfoldl :: (forall d b. Data d => c (d -> b) -> d -> c b) -> (forall g. g -> c g) -> CaseType -> c CaseType # gunfold :: (forall b r. Data b => c (b -> r) -> c r) -> (forall r. r -> c r) -> Constr -> c CaseType # toConstr :: CaseType -> Constr # dataTypeOf :: CaseType -> DataType # dataCast1 :: Typeable t => (forall d. Data d => c (t d)) -> Maybe (c CaseType) # dataCast2 :: Typeable t => (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c CaseType) # gmapT :: (forall b. Data b => b -> b) -> CaseType -> CaseType # gmapQl :: (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> CaseType -> r # gmapQr :: forall r r'. (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> CaseType -> r # gmapQ :: (forall d. Data d => d -> u) -> CaseType -> [u] # gmapQi :: Int -> (forall d. Data d => d -> u) -> CaseType -> u # gmapM :: Monad m => (forall d. Data d => d -> m d) -> CaseType -> m CaseType # gmapMp :: MonadPlus m => (forall d. Data d => d -> m d) -> CaseType -> m CaseType # gmapMo :: MonadPlus m => (forall d. Data d => d -> m d) -> CaseType -> m CaseType #
Generic CaseType # |
Instance details Defined in Idris.Core.CaseTree Associated Types
type Rep CaseType |
Instance details Defined in Idris.Core.CaseTree type Rep CaseType = D1 ('MetaData "CaseType" "Idris.Core.CaseTree" "idris-1.3.4-CzetPXHz9szL2e7hoCyB4A" 'False) (C1 ('MetaCons "Updatable" 'PrefixI 'False) (U1 :: Type -> Type) :+: C1 ('MetaCons "Shared" 'PrefixI 'False) (U1 :: Type -> Type))
Methods from :: CaseType -> Rep CaseType x # to :: Rep CaseType x -> CaseType #
Show CaseType # |
Instance details Defined in Idris.Core.CaseTree Methods showsPrec :: Int -> CaseType -> ShowS # show :: CaseType -> String # showList :: [CaseType] -> ShowS #
Eq CaseType # |
Instance details Defined in Idris.Core.CaseTree Methods (==) :: CaseType -> CaseType -> Bool # (/=) :: CaseType -> CaseType -> Bool #
Ord CaseType # |
Instance details Defined in Idris.Core.CaseTree Methods compare :: CaseType -> CaseType -> Ordering # (<) :: CaseType -> CaseType -> Bool # (<=) :: CaseType -> CaseType -> Bool # (>) :: CaseType -> CaseType -> Bool # (>=) :: CaseType -> CaseType -> Bool # max :: CaseType -> CaseType -> CaseType # min :: CaseType -> CaseType -> CaseType #
type Rep CaseType # |
Instance details Defined in Idris.Core.CaseTree type Rep CaseType = D1 ('MetaData "CaseType" "Idris.Core.CaseTree" "idris-1.3.4-CzetPXHz9szL2e7hoCyB4A" 'False) (C1 ('MetaCons "Updatable" 'PrefixI 'False) (U1 :: Type -> Type) :+: C1 ('MetaCons "Shared" 'PrefixI 'False) (U1 :: Type -> Type))

simpleCase :: Bool -> SC -> Bool -> Phase -> FC -> [Int] -> [(Type, Bool)] -> [([Name], Term, Term)] -> ErasureInfo -> TC CaseDef #

small :: Name -> [Name] -> SC -> Bool #

namesUsed :: SC -> [Name] #

findCalls :: SC -> [Name] -> [(Name, [[Name]])] #

Return all called functions, and which arguments are used in each argument position for the call, in order to help reduce compilation time, and trace all unused arguments

findCalls' :: Bool -> SC -> [Name] -> [(Name, [[Name]])] #

findUsedArgs :: SC -> [Name] -> [Name] #

substSC :: Name -> Name -> SC -> SC #

substAlt :: Name -> Name -> CaseAlt -> CaseAlt #

mkForce :: Name -> Name -> SC -> SC #