Agda-2.6.2.1.20220327: A dependently typed functional programming language and proof assistant
Safe HaskellSafe-Inferred
LanguageHaskell2010

Agda.TypeChecking.Monad.MetaVars

Synopsis

Documentation

data MetaKind Source #

Various kinds of metavariables.

Constructors

Records

Meta variables of record type.

SingletonRecords

Meta variables of "hereditarily singleton" record type.

Levels

Meta variables of level type, if type-in-type is activated.

allMetaKinds :: [MetaKind] Source #

All possible metavariable kinds.

class (MonadConstraint m, MonadReduce m, MonadAddContext m, MonadTCEnv m, ReadTCState m, HasBuiltins m, HasConstInfo m, MonadDebug m) => MonadMetaSolver m where Source #

Monad service class for creating, solving and eta-expanding of metavariables.

Methods

newMeta' :: MetaInstantiation -> Frozen -> MetaInfo -> MetaPriority -> Permutation -> Judgement a -> m MetaId Source #

Generate a new meta variable with some instantiation given. For instance, the instantiation could be a PostponedTypeCheckingProblem.

assignV :: CompareDirection -> MetaId -> Args -> Term -> CompareAs -> m () Source #

Assign to an open metavar which may not be frozen. First check that metavar args are in pattern fragment. Then do extended occurs check on given thing.

Assignment is aborted by throwing a PatternErr via a call to patternViolation. This error is caught by catchConstraint during equality checking (compareAtom) and leads to restoration of the original constraints.

assignTerm' :: MonadMetaSolver m => MetaId -> [Arg ArgName] -> Term -> m () Source #

Directly instantiate the metavariable. Skip pattern check, occurs check and frozen check. Used for eta expanding frozen metas.

etaExpandMeta :: [MetaKind] -> MetaId -> m () Source #

Eta expand a metavariable, if it is of the specified kind. Don't do anything if the metavariable is a blocked term.

updateMetaVar :: MetaId -> (MetaVariable -> MetaVariable) -> m () Source #

Update the status of the metavariable

speculateMetas :: m () -> m KeepMetas -> m () Source #

'speculateMetas fallback m' speculatively runs m, but if the result is RollBackMetas any changes to metavariables are rolled back and fallback is run instead.

dontAssignMetas :: (MonadTCEnv m, HasOptions m, MonadDebug m) => m a -> m a Source #

Switch off assignment of metas.

getMetaStore :: ReadTCState m => m MetaStore Source #

Get the meta store.

metasCreatedBy :: ReadTCState m => m a -> m (a, MetaStore) Source #

Run a computation and record which new metas it created.

lookupMeta' :: ReadTCState m => MetaId -> m (Maybe MetaVariable) Source #

Lookup a meta variable.

metaType :: (MonadFail m, ReadTCState m) => MetaId -> m Type Source #

Type of a term or sort meta.

updateMetaVarTCM :: MetaId -> (MetaVariable -> MetaVariable) -> TCM () Source #

Update the information associated with a meta variable.

insertMetaVar :: MetaId -> MetaVariable -> TCM () Source #

Insert a new meta variable with associated information into the meta store.

getMetaContextArgs :: MonadTCEnv m => MetaVariable -> m Args Source #

Compute the context variables that a meta should be applied to, accounting for pruning.

getMetaTypeInContext :: (MonadFail m, MonadTCEnv m, ReadTCState m, MonadReduce m, HasBuiltins m) => MetaId -> m Type Source #

Given a meta, return the type applied to the current context.

isGeneralizableMeta :: (ReadTCState m, MonadFail m) => MetaId -> m DoGeneralize Source #

Is it a meta that might be generalized?

class IsInstantiatedMeta a where Source #

Check whether all metas are instantiated. Precondition: argument is a meta (in some form) or a list of metas.

Instances

Instances details
IsInstantiatedMeta MetaId Source # 
Instance details

Defined in Agda.TypeChecking.Monad.MetaVars

IsInstantiatedMeta Level Source # 
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Defined in Agda.TypeChecking.Monad.MetaVars

IsInstantiatedMeta PlusLevel Source # 
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Defined in Agda.TypeChecking.Monad.MetaVars

IsInstantiatedMeta Term Source # 
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Defined in Agda.TypeChecking.Monad.MetaVars

IsInstantiatedMeta a => IsInstantiatedMeta (Arg a) Source # 
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Defined in Agda.TypeChecking.Monad.MetaVars

IsInstantiatedMeta a => IsInstantiatedMeta (Abs a) Source #

Does not worry about raising.

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Defined in Agda.TypeChecking.Monad.MetaVars

IsInstantiatedMeta a => IsInstantiatedMeta (Maybe a) Source # 
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Defined in Agda.TypeChecking.Monad.MetaVars

IsInstantiatedMeta a => IsInstantiatedMeta [a] Source # 
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Defined in Agda.TypeChecking.Monad.MetaVars

Methods

isInstantiatedMeta :: (MonadFail m, ReadTCState m) => [a] -> m Bool Source #

constraintMetas :: Constraint -> TCM (Set MetaId) Source #

Returns all metavariables in a constraint. Slightly complicated by the fact that blocked terms are represented by two meta variables. To find the second one we need to look up the meta listeners for the one in the UnBlock constraint. This is used for the purpose of deciding if a metavariable is constrained or if it can be generalized over (see Agda.TypeChecking.Generalize).

createMetaInfo :: (MonadTCEnv m, ReadTCState m) => m MetaInfo Source #

Create MetaInfo in the current environment.

setMetaGeneralizableArgInfo :: MonadMetaSolver m => MetaId -> ArgInfo -> m () Source #

Change the ArgInfo that will be used when generalizing over this meta.

Query and manipulate interaction points.

class (MonadTCEnv m, ReadTCState m) => MonadInteractionPoints m where Source #

Minimal complete definition

Nothing

registerInteractionPoint :: forall m. MonadInteractionPoints m => Bool -> Range -> Maybe Nat -> m InteractionId Source #

Register an interaction point during scope checking. If there is no interaction id yet, create one.

findInteractionPoint_ :: Range -> InteractionPoints -> Maybe InteractionId Source #

Find an interaction point by Range' by searching the whole map. Issue 3000: Don't consider solved interaction points.

O(n): linear in the number of registered interaction points.

connectInteractionPoint :: MonadInteractionPoints m => InteractionId -> MetaId -> m () Source #

Hook up meta variable to interaction point.

removeInteractionPoint :: MonadInteractionPoints m => InteractionId -> m () Source #

Mark an interaction point as solved.

getInteractionPoints :: ReadTCState m => m [InteractionId] Source #

Get a list of interaction ids.

getInteractionMetas :: ReadTCState m => m [MetaId] Source #

Get all metas that correspond to unsolved interaction ids.

getInteractionIdsAndMetas :: ReadTCState m => m [(InteractionId, MetaId)] Source #

Get all metas that correspond to unsolved interaction ids.

isInteractionMeta :: ReadTCState m => MetaId -> m (Maybe InteractionId) Source #

Does the meta variable correspond to an interaction point?

Time: O(log n) where n is the number of interaction metas.

lookupInteractionPoint :: (MonadFail m, ReadTCState m, MonadError TCErr m) => InteractionId -> m InteractionPoint Source #

Get the information associated to an interaction point.

lookupInteractionId :: (MonadFail m, ReadTCState m, MonadError TCErr m, MonadTCEnv m) => InteractionId -> m MetaId Source #

Get MetaId for an interaction point. Precondition: interaction point is connected.

lookupInteractionMeta :: ReadTCState m => InteractionId -> m (Maybe MetaId) Source #

Check whether an interaction id is already associated with a meta variable.

newMeta :: MonadMetaSolver m => Frozen -> MetaInfo -> MetaPriority -> Permutation -> Judgement a -> m MetaId Source #

Generate new meta variable.

newMetaTCM' :: MetaInstantiation -> Frozen -> MetaInfo -> MetaPriority -> Permutation -> Judgement a -> TCM MetaId Source #

Generate a new meta variable with some instantiation given. For instance, the instantiation could be a PostponedTypeCheckingProblem.

getInteractionRange :: (MonadInteractionPoints m, MonadFail m, MonadError TCErr m) => InteractionId -> m Range Source #

Get the Range' for an interaction point.

getMetaRange :: (MonadFail m, ReadTCState m) => MetaId -> m Range Source #

Get the Range' for a meta variable.

withInteractionId :: (MonadFail m, ReadTCState m, MonadError TCErr m, MonadTCEnv m, MonadTrace m) => InteractionId -> m a -> m a Source #

listenToMeta :: MonadMetaSolver m => Listener -> MetaId -> m () Source #

listenToMeta l m: register l as a listener to m. This is done when the type of l is blocked by m.

unlistenToMeta :: MonadMetaSolver m => Listener -> MetaId -> m () Source #

Unregister a listener.

getMetaListeners :: (MonadFail m, ReadTCState m) => MetaId -> m [Listener] Source #

Get the listeners to a meta.

Freezing and unfreezing metas.

freezeMetas :: MetaStore -> TCM IntSet Source #

Freeze the given meta-variables and return those that were not already frozen.

unfreezeMetas :: TCM () Source #

Thaw all meta variables.

class UnFreezeMeta a where Source #

Unfreeze meta and its type if this is a meta again. Does not unfreeze deep occurrences of metas.

Methods

unfreezeMeta :: MonadMetaSolver m => a -> m () Source #

Instances

Instances details
UnFreezeMeta MetaId Source # 
Instance details

Defined in Agda.TypeChecking.Monad.MetaVars

Methods

unfreezeMeta :: MonadMetaSolver m => MetaId -> m () Source #

UnFreezeMeta Level Source # 
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Defined in Agda.TypeChecking.Monad.MetaVars

Methods

unfreezeMeta :: MonadMetaSolver m => Level -> m () Source #

UnFreezeMeta PlusLevel Source # 
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Defined in Agda.TypeChecking.Monad.MetaVars

UnFreezeMeta Sort Source # 
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Defined in Agda.TypeChecking.Monad.MetaVars

Methods

unfreezeMeta :: MonadMetaSolver m => Sort -> m () Source #

UnFreezeMeta Term Source # 
Instance details

Defined in Agda.TypeChecking.Monad.MetaVars

Methods

unfreezeMeta :: MonadMetaSolver m => Term -> m () Source #

UnFreezeMeta Type Source # 
Instance details

Defined in Agda.TypeChecking.Monad.MetaVars

Methods

unfreezeMeta :: MonadMetaSolver m => Type -> m () Source #

UnFreezeMeta a => UnFreezeMeta (Abs a) Source # 
Instance details

Defined in Agda.TypeChecking.Monad.MetaVars

Methods

unfreezeMeta :: MonadMetaSolver m => Abs a -> m () Source #

UnFreezeMeta a => UnFreezeMeta [a] Source # 
Instance details

Defined in Agda.TypeChecking.Monad.MetaVars

Methods

unfreezeMeta :: MonadMetaSolver m => [a] -> m () Source #