Agda-2.6.2.2.20221106: A dependently typed functional programming language and proof assistant
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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 local meta-variable, if it is of the specified kind. Don't do anything if the meta-variable 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.

Instances

Instances details
MonadMetaSolver TCM Source # 
Instance details

Defined in Agda.TypeChecking.MetaVars

(PureTCM m, MonadBlock m) => MonadMetaSolver (PureConversionT m) Source # 
Instance details

Defined in Agda.TypeChecking.Conversion.Pure

MonadMetaSolver m => MonadMetaSolver (ReaderT r m) Source # 
Instance details

Defined in Agda.TypeChecking.Monad.MetaVars

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

Switch off assignment of metas.

isRemoteMeta :: ReadTCState m => m (MetaId -> Bool) Source #

Is the meta-variable from another top-level module?

nextLocalMeta :: ReadTCState m => m MetaId Source #

If another meta-variable is created, then it will get this MetaId (unless the state is changed too much, for instance by setTopLevelModule).

data LocalMetaStores Source #

Pairs of local meta-stores.

Constructors

LocalMetaStores 

Fields

metasCreatedBy :: forall m a. ReadTCState m => m a -> m (a, LocalMetaStores) Source #

Run a computation and record which new metas it created.

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

Find information about the given local meta-variable, if any.

lookupLocalMeta :: (HasCallStack, MonadDebug m, ReadTCState m) => MetaId -> m MetaVariable Source #

Find information about the given local meta-variable.

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

Find information about the (local or remote) meta-variable, if any.

If no meta-variable is found, then the reason could be that the dead-code elimination (eliminateDeadCode) failed to find the meta-variable, perhaps because some NamesIn instance is incorrectly defined.

lookupMetaInstantiation :: ReadTCState m => MetaId -> m MetaInstantiation Source #

Find the meta-variable's instantiation.

lookupMetaJudgement :: ReadTCState m => MetaId -> m (Judgement MetaId) Source #

Find the meta-variable's judgement.

lookupMetaModality :: ReadTCState m => MetaId -> m Modality Source #

Find the meta-variable's modality.

metaType :: ReadTCState m => MetaId -> m Type Source #

The type of a term or sort meta-variable.

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

Update the information associated with a local meta-variable.

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

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

getMetaPriority :: (HasCallStack, MonadDebug m, ReadTCState m) => MetaId -> m MetaPriority Source #

Returns the MetaPriority of the given local meta-variable.

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

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

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

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

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

Is it a local meta-variable 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 # 
Instance details

Defined in Agda.TypeChecking.Monad.MetaVars

IsInstantiatedMeta PlusLevel Source # 
Instance details

Defined in Agda.TypeChecking.Monad.MetaVars

IsInstantiatedMeta Term Source # 
Instance details

Defined in Agda.TypeChecking.Monad.MetaVars

IsInstantiatedMeta a => IsInstantiatedMeta (Arg a) Source # 
Instance details

Defined in Agda.TypeChecking.Monad.MetaVars

IsInstantiatedMeta a => IsInstantiatedMeta (Abs a) Source #

Does not worry about raising.

Instance details

Defined in Agda.TypeChecking.Monad.MetaVars

IsInstantiatedMeta a => IsInstantiatedMeta (Maybe a) Source # 
Instance details

Defined in Agda.TypeChecking.Monad.MetaVars

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

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 local meta-variable.

Query and manipulate interaction points.

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

Minimal complete definition

Nothing

Instances

Instances details
MonadInteractionPoints AbsToCon Source # 
Instance details

Defined in Agda.Syntax.Translation.AbstractToConcrete

MonadInteractionPoints TCM Source # 
Instance details

Defined in Agda.TypeChecking.Monad.MetaVars

(PureTCM m, MonadBlock m) => MonadInteractionPoints (PureConversionT m) Source # 
Instance details

Defined in Agda.TypeChecking.Conversion.Pure

MonadInteractionPoints m => MonadInteractionPoints (IdentityT m) Source # 
Instance details

Defined in Agda.TypeChecking.Monad.MetaVars

MonadInteractionPoints m => MonadInteractionPoints (ReaderT r m) Source # 
Instance details

Defined in Agda.TypeChecking.Monad.MetaVars

MonadInteractionPoints m => MonadInteractionPoints (StateT s m) Source # 
Instance details

Defined in Agda.TypeChecking.Monad.MetaVars

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 a local meta-variable to an 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.

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

Get the Range' for a local meta-variable.

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 :: (HasCallStack, MonadDebug m, ReadTCState m) => MetaId -> m [Listener] Source #

Get the listeners for a local meta-variable.

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

Do safe eta-expansions for meta (SingletonRecords,Levels).

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

Eta expand metavariables listening on the current meta.

wakeupListener :: MonadMetaSolver m => Listener -> m () Source #

Wake up a meta listener and let it do its thing

Freezing and unfreezing metas.

freezeMetas :: MonadTCState m => LocalMetaStore -> m (Set MetaId) Source #

Freeze the given meta-variables (but only if they are open) and return those that were not already frozen.

unfreezeMetas :: TCM () Source #

Thaw all open meta variables.

class UnFreezeMeta a where Source #

Unfreeze a meta and its type if this is a meta again. Does not unfreeze deep occurrences of meta-variables or remote meta-variables.

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 # 
Instance details

Defined in Agda.TypeChecking.Monad.MetaVars

Methods

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

UnFreezeMeta PlusLevel Source # 
Instance details

Defined in Agda.TypeChecking.Monad.MetaVars

UnFreezeMeta Sort Source # 
Instance details

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 #