Safe Haskell	Safe-Inferred
Language	Haskell2010

Agda.TypeChecking.Rewriting.NonLinMatch

Description

Non-linear matching of the lhs of a rewrite rule against a neutral term.

Given a lhs

Δ ⊢ lhs : B

and a candidate term

Γ ⊢ t : A

we seek a substitution Γ ⊢ σ : Δ such that

Γ ⊢ B[σ] = A and Γ ⊢ lhs[σ] = t : A

Synopsis

newtype NLM a = NLM {
- unNLM :: ExceptT Blocked_ (StateT NLMState ReduceM) a
}
data NLMState = NLMState {
- _nlmSub :: Sub
- _nlmEqs :: PostponedEquations
}
nlmSub :: Lens' Sub NLMState
nlmEqs :: Lens' PostponedEquations NLMState
runNLM :: MonadReduce m => NLM () -> m (Either Blocked_ NLMState)
matchingBlocked :: Blocked_ -> NLM ()
tellSub :: Relevance -> Int -> Type -> Term -> NLM ()
tellEq :: Telescope -> Telescope -> Type -> Term -> Term -> NLM ()
type Sub = IntMap (Relevance, Term)
data PostponedEquation = PostponedEquation {
- eqFreeVars :: Telescope
- eqType :: Type
- eqLhs :: Term
- eqRhs :: Term
}
type PostponedEquations = [PostponedEquation]
class Match t a b where
- match :: Relevance -> Telescope -> Telescope -> t -> a -> b -> NLM ()
makeSubstitution :: Telescope -> Sub -> Maybe Substitution
checkPostponedEquations :: PureTCM m => Substitution -> PostponedEquations -> m (Maybe Blocked_)
nonLinMatch :: (PureTCM m, Match t a b) => Telescope -> t -> a -> b -> m (Either Blocked_ Substitution)
equal :: PureTCM m => Type -> Term -> Term -> m (Maybe Blocked_)
getTypedHead :: PureTCM m => Term -> m (Maybe (QName, Type))

Documentation

newtype NLM a Source #

Monad for non-linear matching.

Constructors

NLM
Fields unNLM :: ExceptT Blocked_ (StateT NLMState ReduceM) a

Instances

Instances details

HasOptions NLM Source #
Instance details Defined in Agda.TypeChecking.Rewriting.NonLinMatch Methods pragmaOptions :: NLM PragmaOptions Source # commandLineOptions :: NLM CommandLineOptions Source #
MonadBlock NLM Source #
Instance details Defined in Agda.TypeChecking.Rewriting.NonLinMatch Methods patternViolation :: Blocker -> NLM a Source # catchPatternErr :: (Blocker -> NLM a) -> NLM a -> NLM a Source #
MonadReduce NLM Source #
Instance details Defined in Agda.TypeChecking.Rewriting.NonLinMatch Methods liftReduce :: ReduceM a -> NLM a Source #
MonadTCEnv NLM Source #
Instance details Defined in Agda.TypeChecking.Rewriting.NonLinMatch Methods askTC :: NLM TCEnv Source # localTC :: (TCEnv -> TCEnv) -> NLM a -> NLM a Source #
ReadTCState NLM Source #
Instance details Defined in Agda.TypeChecking.Rewriting.NonLinMatch Methods getTCState :: NLM TCState Source # locallyTCState :: Lens' a TCState -> (a -> a) -> NLM b -> NLM b Source # withTCState :: (TCState -> TCState) -> NLM a -> NLM a Source #
HasBuiltins NLM Source #
Instance details Defined in Agda.TypeChecking.Rewriting.NonLinMatch Methods getBuiltinThing :: String -> NLM (Maybe (Builtin PrimFun)) Source #
MonadAddContext NLM Source #
Instance details Defined in Agda.TypeChecking.Rewriting.NonLinMatch Methods addCtx :: Name -> Dom Type -> NLM a -> NLM a Source # addLetBinding' :: Name -> Term -> Dom Type -> NLM a -> NLM a Source # updateContext :: Substitution -> (Context -> Context) -> NLM a -> NLM a Source # withFreshName :: Range -> ArgName -> (Name -> NLM a) -> NLM a Source #
MonadDebug NLM Source #
Instance details Defined in Agda.TypeChecking.Rewriting.NonLinMatch Methods formatDebugMessage :: VerboseKey -> VerboseLevel -> TCM Doc -> NLM String Source # traceDebugMessage :: VerboseKey -> VerboseLevel -> String -> NLM a -> NLM a Source # verboseBracket :: VerboseKey -> VerboseLevel -> String -> NLM a -> NLM a Source # getVerbosity :: NLM Verbosity Source # getProfileOptions :: NLM ProfileOptions Source # isDebugPrinting :: NLM Bool Source # nowDebugPrinting :: NLM a -> NLM a Source #
PureTCM NLM Source #
Instance details Defined in Agda.TypeChecking.Rewriting.NonLinMatch
HasConstInfo NLM Source #
Instance details Defined in Agda.TypeChecking.Rewriting.NonLinMatch Methods getConstInfo :: QName -> NLM Definition Source # getConstInfo' :: QName -> NLM (Either SigError Definition) Source # getRewriteRulesFor :: QName -> NLM RewriteRules Source #
MonadFail NLM Source #
Instance details Defined in Agda.TypeChecking.Rewriting.NonLinMatch Methods fail :: String -> NLM a #
Alternative NLM Source #
Instance details Defined in Agda.TypeChecking.Rewriting.NonLinMatch Methods empty :: NLM a # (<\|>) :: NLM a -> NLM a -> NLM a # some :: NLM a -> NLM [a] # many :: NLM a -> NLM [a] #
Applicative NLM Source #
Instance details Defined in Agda.TypeChecking.Rewriting.NonLinMatch Methods pure :: a -> NLM a # (<>) :: NLM (a -> b) -> NLM a -> NLM b # liftA2 :: (a -> b -> c) -> NLM a -> NLM b -> NLM c # (>) :: NLM a -> NLM b -> NLM b # (<*) :: NLM a -> NLM b -> NLM a #
Functor NLM Source #
Instance details Defined in Agda.TypeChecking.Rewriting.NonLinMatch Methods fmap :: (a -> b) -> NLM a -> NLM b # (<$) :: a -> NLM b -> NLM a #
Monad NLM Source #
Instance details Defined in Agda.TypeChecking.Rewriting.NonLinMatch Methods (>>=) :: NLM a -> (a -> NLM b) -> NLM b # (>>) :: NLM a -> NLM b -> NLM b # return :: a -> NLM a #
MonadPlus NLM Source #
Instance details Defined in Agda.TypeChecking.Rewriting.NonLinMatch Methods mzero :: NLM a # mplus :: NLM a -> NLM a -> NLM a #
MonadError Blocked_ NLM Source #
Instance details Defined in Agda.TypeChecking.Rewriting.NonLinMatch Methods throwError :: Blocked_ -> NLM a # catchError :: NLM a -> (Blocked_ -> NLM a) -> NLM a #
MonadState NLMState NLM Source #
Instance details Defined in Agda.TypeChecking.Rewriting.NonLinMatch Methods get :: NLM NLMState # put :: NLMState -> NLM () # state :: (NLMState -> (a, NLMState)) -> NLM a #

data NLMState Source #

Constructors

NLMState
Fields _nlmSub :: Sub _nlmEqs :: PostponedEquations

Instances

Instances details

Null NLMState Source #
Instance details Defined in Agda.TypeChecking.Rewriting.NonLinMatch Methods empty :: NLMState Source # null :: NLMState -> Bool Source #
MonadState NLMState NLM Source #
Instance details Defined in Agda.TypeChecking.Rewriting.NonLinMatch Methods get :: NLM NLMState # put :: NLMState -> NLM () # state :: (NLMState -> (a, NLMState)) -> NLM a #

nlmSub :: Lens' Sub NLMState Source #

nlmEqs :: Lens' PostponedEquations NLMState Source #

runNLM :: MonadReduce m => NLM () -> m (Either Blocked_ NLMState) Source #

matchingBlocked :: Blocked_ -> NLM () Source #

tellSub :: Relevance -> Int -> Type -> Term -> NLM () Source #

Add substitution i |-> v : a to result of matching.

tellEq :: Telescope -> Telescope -> Type -> Term -> Term -> NLM () Source #

type Sub = IntMap (Relevance, Term) Source #

data PostponedEquation Source #

Matching against a term produces a constraint which we have to verify after applying the substitution computed by matching.

Constructors

PostponedEquation
Fields eqFreeVars :: Telescope Telescope of free variables in the equation eqType :: Type Type of the equation, living in same context as the rhs. eqLhs :: Term Term from pattern, living in pattern context. eqRhs :: Term Term from scrutinee, living in context where matching was invoked.

type PostponedEquations = [PostponedEquation] Source #

class Match t a b where Source #

Match a non-linear pattern against a neutral term, returning a substitution.

Methods

match Source #

Arguments

:: Relevance	Are we currently matching in an irrelevant context?
-> Telescope	The telescope of pattern variables
-> Telescope	The telescope of lambda-bound variables
-> t	The type of the pattern
-> a	The pattern to match
-> b	The term to be matched against the pattern
-> NLM ()

Instances

Instances details

Match Type NLPat Term Source #
Instance details Defined in Agda.TypeChecking.Rewriting.NonLinMatch Methods match :: Relevance -> Telescope -> Telescope -> Type -> NLPat -> Term -> NLM () Source #
Match () NLPSort Sort Source #
Instance details Defined in Agda.TypeChecking.Rewriting.NonLinMatch Methods match :: Relevance -> Telescope -> Telescope -> () -> NLPSort -> Sort -> NLM () Source #
Match () NLPType Type Source #
Instance details Defined in Agda.TypeChecking.Rewriting.NonLinMatch Methods match :: Relevance -> Telescope -> Telescope -> () -> NLPType -> Type -> NLM () Source #
Match () NLPat Level Source #
Instance details Defined in Agda.TypeChecking.Rewriting.NonLinMatch Methods match :: Relevance -> Telescope -> Telescope -> () -> NLPat -> Level -> NLM () Source #
Match t a b => Match t (Dom a) (Dom b) Source #
Instance details Defined in Agda.TypeChecking.Rewriting.NonLinMatch Methods match :: Relevance -> Telescope -> Telescope -> t -> Dom a -> Dom b -> NLM () Source #
Match t a b => Match (Dom t) (Arg a) (Arg b) Source #
Instance details Defined in Agda.TypeChecking.Rewriting.NonLinMatch Methods match :: Relevance -> Telescope -> Telescope -> Dom t -> Arg a -> Arg b -> NLM () Source #
Match (Type, Elims -> Term) [Elim' NLPat] Elims Source #
Instance details Defined in Agda.TypeChecking.Rewriting.NonLinMatch Methods match :: Relevance -> Telescope -> Telescope -> (Type, Elims -> Term) -> [Elim' NLPat] -> Elims -> NLM () Source #

makeSubstitution :: Telescope -> Sub -> Maybe Substitution Source #

checkPostponedEquations :: PureTCM m => Substitution -> PostponedEquations -> m (Maybe Blocked_) Source #

nonLinMatch :: (PureTCM m, Match t a b) => Telescope -> t -> a -> b -> m (Either Blocked_ Substitution) Source #

equal :: PureTCM m => Type -> Term -> Term -> m (Maybe Blocked_) Source #

Typed βη-equality, also handles empty record types. Returns Nothing if the terms are equal, or `Just b` if the terms are not (where b contains information about possible metas blocking the comparison)

getTypedHead :: PureTCM m => Term -> m (Maybe (QName, Type)) Source #

Utility function for getting the name and type of a head term (i.e. a Def or Con with no arguments)