| Safe Haskell | Safe-Inferred |
|---|---|
| Language | Haskell2010 |
PlutusCore.DeBruijn.Internal
Description
Support for using de Bruijn indices for term and type names.
Synopsis
- newtype Index = Index Word64
- class HasIndex a where
- newtype DeBruijn = DeBruijn {}
- data NamedDeBruijn = NamedDeBruijn {
- ndbnString ∷ !Text
- ndbnIndex ∷ !Index
- newtype FakeNamedDeBruijn = FakeNamedDeBruijn {}
- newtype TyDeBruijn = TyDeBruijn DeBruijn
- newtype NamedTyDeBruijn = NamedTyDeBruijn NamedDeBruijn
- data FreeVariableError
- = FreeUnique !Unique
- | FreeIndex !Index
- class AsFreeVariableError r where
- _FreeVariableError ∷ Prism' r FreeVariableError
- _FreeUnique ∷ Prism' r Unique
- _FreeIndex ∷ Prism' r Index
- newtype Level = Level Integer
- data LevelInfo = LevelInfo {
- currentLevel ∷ Level
- levelMapping ∷ Bimap Unique Level
- declareUnique ∷ (MonadReader LevelInfo m, HasUnique name unique) ⇒ name → m a → m a
- declareBinder ∷ (MonadReader LevelInfo m, MonadQuote m) ⇒ m a → m a
- withScope ∷ MonadReader LevelInfo m ⇒ m a → m a
- getIndex ∷ MonadReader LevelInfo m ⇒ Unique → (Unique → m Index) → m Index
- getUnique ∷ MonadReader LevelInfo m ⇒ Index → (Index → m Unique) → m Unique
- unNameDeBruijn ∷ NamedDeBruijn → DeBruijn
- unNameTyDeBruijn ∷ NamedTyDeBruijn → TyDeBruijn
- fakeNameDeBruijn ∷ DeBruijn → NamedDeBruijn
- fakeTyNameDeBruijn ∷ TyDeBruijn → NamedTyDeBruijn
- nameToDeBruijn ∷ MonadReader LevelInfo m ⇒ (Unique → m Index) → Name → m NamedDeBruijn
- tyNameToDeBruijn ∷ MonadReader LevelInfo m ⇒ (Unique → m Index) → TyName → m NamedTyDeBruijn
- deBruijnToName ∷ MonadReader LevelInfo m ⇒ (Index → m Unique) → NamedDeBruijn → m Name
- deBruijnToTyName ∷ MonadReader LevelInfo m ⇒ (Index → m Unique) → NamedTyDeBruijn → m TyName
- freeIndexThrow ∷ (AsFreeVariableError e, MonadError e m) ⇒ Index → m Unique
- freeIndexAsConsistentLevel ∷ (MonadReader LevelInfo m, MonadState (Map Level Unique) m, MonadQuote m) ⇒ Index → m Unique
- freeUniqueThrow ∷ (AsFreeVariableError e, MonadError e m) ⇒ Unique → m Index
- runDeBruijnT ∷ ReaderT LevelInfo m a → m a
- deBruijnInitIndex ∷ Index
- toFake ∷ DeBruijn → FakeNamedDeBruijn
- fromFake ∷ FakeNamedDeBruijn → DeBruijn
Documentation
A relative index used for de Bruijn identifiers.
FIXME: downside of using newtype+Num instead of type-synonym is that `-Woverflowed-literals` does not work, e.g.: `DeBruijn (-1)` has no warning. To trigger the warning you have to bypass the Num and write `DeBruijn (Index -1)`. This can be revisited when we implement PLT-1053.
Instances
| Enum Index Source # | |
| Generic Index Source # | |
| Num Index Source # | |
| Read Index Source # | |
| Integral Index Source # | |
Defined in PlutusCore.DeBruijn.Internal | |
| Real Index Source # | |
Defined in PlutusCore.DeBruijn.Internal Methods toRational ∷ Index → Rational Source # | |
| Show Index Source # | |
| NFData Index Source # | |
Defined in PlutusCore.DeBruijn.Internal | |
| Flat Index Source # | |
| Eq Index Source # | |
| Ord Index Source # | |
Defined in PlutusCore.DeBruijn.Internal | |
| Hashable Index Source # | |
| Pretty Index Source # | |
| type Rep Index Source # | |
Defined in PlutusCore.DeBruijn.Internal | |
class HasIndex a where Source #
Instances
| HasIndex DeBruijn Source # | |
| HasIndex NamedDeBruijn Source # | |
Defined in PlutusCore.DeBruijn.Internal | |
| HasIndex NamedTyDeBruijn Source # | |
Defined in PlutusCore.DeBruijn.Internal | |
| HasIndex TyDeBruijn Source # | |
Defined in PlutusCore.DeBruijn.Internal | |
A term name as a de Bruijn index, without the name string.
Instances
| Generic DeBruijn Source # | |
| Show DeBruijn Source # | |
| NFData DeBruijn Source # | |
Defined in PlutusCore.DeBruijn.Internal | |
| Flat DeBruijn Source # | |
| Eq DeBruijn Source # | |
| Hashable DeBruijn Source # | |
| HasIndex DeBruijn Source # | |
| HasPrettyConfigName config ⇒ PrettyBy config DeBruijn Source # | |
| Flat (Binder DeBruijn) Source # | |
| (GEq uni, Closed uni, Everywhere uni Eq, Eq fun, Eq ann) ⇒ Eq (Term DeBruijn uni fun ann) Source # | |
| HashableTermConstraints uni fun ann ⇒ Hashable (Term DeBruijn uni fun ann) Source # | |
| (GEq uni, Closed uni, Everywhere uni Eq, Eq fun, Eq ann) ⇒ Eq (Term TyDeBruijn DeBruijn uni fun ann) Source # | |
Defined in PlutusCore.Core.Instance.Eq Methods (==) ∷ Term TyDeBruijn DeBruijn uni fun ann → Term TyDeBruijn DeBruijn uni fun ann → Bool Source # (/=) ∷ Term TyDeBruijn DeBruijn uni fun ann → Term TyDeBruijn DeBruijn uni fun ann → Bool Source # | |
| type Rep DeBruijn Source # | |
Defined in PlutusCore.DeBruijn.Internal | |
data NamedDeBruijn Source #
A term name as a de Bruijn index.
Constructors
| NamedDeBruijn | |
Fields
| |
Instances
newtype FakeNamedDeBruijn Source #
A wrapper around NamedDeBruijn that *must* hold the invariant of name=fakeName.
We do not export the FakeNamedDeBruijn constructor: the projection `FND->ND` is safe
but injection `ND->FND` is unsafe, thus they are not isomorphic.
See Note [Why newtype FakeNamedDeBruijn]
Constructors
| FakeNamedDeBruijn | |
Fields | |
Instances
newtype TyDeBruijn Source #
A type name as a de Bruijn index, without the name string.
Constructors
| TyDeBruijn DeBruijn |
Instances
newtype NamedTyDeBruijn Source #
A type name as a de Bruijn index.
Constructors
| NamedTyDeBruijn NamedDeBruijn |
Instances
data FreeVariableError Source #
We cannot do a correct translation to or from de Bruijn indices if the program is not well-scoped. So we throw an error in such a case.
Constructors
| FreeUnique !Unique | |
| FreeIndex !Index |
Instances
class AsFreeVariableError r where Source #
Minimal complete definition
Methods
_FreeVariableError ∷ Prism' r FreeVariableError Source #
_FreeUnique ∷ Prism' r Unique Source #
_FreeIndex ∷ Prism' r Index Source #
Instances
| AsFreeVariableError FreeVariableError Source # | |
Defined in PlutusCore.DeBruijn.Internal Methods _FreeVariableError ∷ Prism' FreeVariableError FreeVariableError Source # _FreeUnique ∷ Prism' FreeVariableError Unique Source # _FreeIndex ∷ Prism' FreeVariableError Index Source # | |
| AsFreeVariableError (Error uni fun ann) Source # | |
Defined in PlutusCore.Error Methods _FreeVariableError ∷ Prism' (Error uni fun ann) FreeVariableError Source # _FreeUnique ∷ Prism' (Error uni fun ann) Unique Source # _FreeIndex ∷ Prism' (Error uni fun ann) Index Source # | |
An absolute level in the program.
Instances
| Enum Level Source # | |
| Num Level Source # | |
| Integral Level Source # | |
Defined in PlutusCore.DeBruijn.Internal | |
| Real Level Source # | |
Defined in PlutusCore.DeBruijn.Internal Methods toRational ∷ Level → Rational Source # | |
| Eq Level Source # | |
| Ord Level Source # | |
Defined in PlutusCore.DeBruijn.Internal | |
During visiting the AST we hold a reader "state" of current level and a current scoping (levelMapping). Invariant-A: the current level is positive and greater than all levels in the levelMapping. Invariant-B: only positive levels are stored in the levelMapping.
Constructors
| LevelInfo | |
Fields
| |
declareUnique ∷ (MonadReader LevelInfo m, HasUnique name unique) ⇒ name → m a → m a Source #
Declare a name with a unique, recording the mapping to a Level.
declareBinder ∷ (MonadReader LevelInfo m, MonadQuote m) ⇒ m a → m a Source #
Declares a new binder by assigning a fresh unique to the *current level*.
Maintains invariant-B of LevelInfo (that only positive levels are stored),
since current level is always positive (invariant-A).
See Note [DeBruijn indices of Binders]
withScope ∷ MonadReader LevelInfo m ⇒ m a → m a Source #
Enter a scope, incrementing the current Level by one
Maintains invariant-A (that the current level is positive).
nameToDeBruijn ∷ MonadReader LevelInfo m ⇒ (Unique → m Index) → Name → m NamedDeBruijn Source #
tyNameToDeBruijn ∷ MonadReader LevelInfo m ⇒ (Unique → m Index) → TyName → m NamedTyDeBruijn Source #
deBruijnToName ∷ MonadReader LevelInfo m ⇒ (Index → m Unique) → NamedDeBruijn → m Name Source #
deBruijnToTyName ∷ MonadReader LevelInfo m ⇒ (Index → m Unique) → NamedTyDeBruijn → m TyName Source #
freeIndexThrow ∷ (AsFreeVariableError e, MonadError e m) ⇒ Index → m Unique Source #
The default handler of throwing an error upon encountering a free debruijn index.
freeIndexAsConsistentLevel ∷ (MonadReader LevelInfo m, MonadState (Map Level Unique) m, MonadQuote m) ⇒ Index → m Unique Source #
A different implementation of a handler, where "free" debruijn indices do not throw an error but are instead gracefully converted to fresh uniques. These generated uniques remain free; i.e. if the original term was open, it will remain open after applying this handler. These generated free uniques are consistent across the open term (by using a state cache).
freeUniqueThrow ∷ (AsFreeVariableError e, MonadError e m) ⇒ Unique → m Index Source #
The default handler of throwing an error upon encountering a free name (unique).
runDeBruijnT ∷ ReaderT LevelInfo m a → m a Source #
deBruijnInitIndex ∷ Index Source #
The LamAbs index (for debruijn indices) and the starting level of DeBruijn monad