quox/lib/Quox/Parser/FromParser.idr

383 lines
11 KiB
Idris

||| take freshly-parsed input, scope check, type check, add to env
module Quox.Parser.FromParser
import Quox.Parser.Syntax
import Quox.Parser.Parser
import Quox.Typechecker
import Data.List
import Data.Maybe
import Data.SnocVect
import Quox.EffExtra
import System.File
import System.Path
import Data.IORef
import public Quox.Parser.FromParser.Error as Quox.Parser.FromParser
%default total
%hide Typing.Error
%hide Lexer.Error
%hide Parser.Error
public export
NDefinition : Type
NDefinition = (Name, Definition)
public export
IncludePath : Type
IncludePath = List String
public export
SeenFiles : Type
SeenFiles = SortedSet String
public export
data StateTag = NS | SEEN
public export
FromParserPure : List (Type -> Type)
FromParserPure =
[Except Error, DefsState, StateL NS Mods, NameGen]
public export
LoadFile' : List (Type -> Type)
LoadFile' = [IO, StateL SEEN SeenFiles, Reader IncludePath]
public export
LoadFile : List (Type -> Type)
LoadFile = LoadFile' ++ [Except Error]
public export
FromParserIO : List (Type -> Type)
FromParserIO = FromParserPure ++ LoadFile'
parameters {auto _ : Functor m} (b : Var n -> m a) (f : PName -> m a)
(xs : Context' PatVar n)
private
fromBaseName : PBaseName -> m a
fromBaseName x = maybe (f $ MakePName [<] x) b $
Context.find (\y => y.name == Just x) xs
private
fromName : PName -> m a
fromName x = if null x.mods then fromBaseName x.base else f x
export
fromPDimWith : Has (Except Error) fs =>
Context' PatVar d -> PDim -> Eff fs (Dim d)
fromPDimWith ds (K e loc) = pure $ K e loc
fromPDimWith ds (V i loc) =
fromBaseName (\i => pure $ B i loc)
(const $ throw $ DimNotInScope loc i) ds i
private
avoidDim : Has (Except Error) fs =>
Context' PatVar d -> Loc -> PName -> Eff fs Name
avoidDim ds loc x =
fromName (const $ throw $ DimNameInTerm loc x.base) (pure . fromPName) ds x
private
resolveName : Mods -> Loc -> Name -> Maybe Universe ->
Eff FromParserPure (Term d n)
resolveName ns loc x u =
let here = addMods ns x in
if isJust $ lookup here !(getAt DEFS) then
pure $ FT here (fromMaybe 0 u) loc
else do
let ns :< _ = ns
| _ => throw $ TermNotInScope loc x
resolveName ns loc x u
export
fromPatVar : PatVar -> BindName
fromPatVar (Unused loc) = BN Unused loc
fromPatVar (PV x loc) = BN (UN x) loc
export
fromPQty : PQty -> Qty
fromPQty (PQ q _) = q
export
fromPTagVal : PTagVal -> TagVal
fromPTagVal (PT t _) = t
private
fromV : Context' PatVar d -> Context' PatVar n ->
PName -> Maybe Universe -> Loc -> Eff FromParserPure (Term d n)
fromV ds ns x u loc = fromName bound free ns x where
bound : Var n -> Eff FromParserPure (Term d n)
bound i = do whenJust u $ \u => throw $ DisplacedBoundVar loc x
pure $ E $ B i loc
free : PName -> Eff FromParserPure (Term d n)
free x = do x <- avoidDim ds loc x
resolveName !(getAt NS) loc x u
mutual
export
fromPTermWith : Context' PatVar d -> Context' PatVar n ->
PTerm -> Eff FromParserPure (Term d n)
fromPTermWith ds ns t0 = case t0 of
TYPE k loc =>
pure $ TYPE k loc
Pi pi x s t loc =>
Pi (fromPQty pi)
<$> fromPTermWith ds ns s
<*> fromPTermTScope ds ns [< x] t
<*> pure loc
Lam x s loc =>
Lam <$> fromPTermTScope ds ns [< x] s <*> pure loc
App s t loc =>
map E $ App
<$> fromPTermElim ds ns s
<*> fromPTermWith ds ns t
<*> pure loc
Sig x s t loc =>
Sig <$> fromPTermWith ds ns s
<*> fromPTermTScope ds ns [< x] t
<*> pure loc
Pair s t loc =>
Pair <$> fromPTermWith ds ns s <*> fromPTermWith ds ns t <*> pure loc
Case pi pair (r, ret) (CasePair (x, y) body _) loc =>
map E $ CasePair (fromPQty pi)
<$> fromPTermElim ds ns pair
<*> fromPTermTScope ds ns [< r] ret
<*> fromPTermTScope ds ns [< x, y] body
<*> pure loc
Case pi tag (r, ret) (CaseEnum arms _) loc =>
map E $ CaseEnum (fromPQty pi)
<$> fromPTermElim ds ns tag
<*> fromPTermTScope ds ns [< r] ret
<*> assert_total fromPTermEnumArms ds ns arms
<*> pure loc
Nat loc => pure $ Nat loc
Zero loc => pure $ Zero loc
Succ n loc => [|Succ (fromPTermWith ds ns n) (pure loc)|]
Case pi nat (r, ret) (CaseNat zer (s, pi', ih, suc) _) loc =>
map E $ CaseNat (fromPQty pi) (fromPQty pi')
<$> fromPTermElim ds ns nat
<*> fromPTermTScope ds ns [< r] ret
<*> fromPTermWith ds ns zer
<*> fromPTermTScope ds ns [< s, ih] suc
<*> pure loc
Enum strs loc =>
let set = SortedSet.fromList strs in
if length strs == length (SortedSet.toList set) then
pure $ Enum set loc
else
throw $ DuplicatesInEnum loc strs
Tag str loc => pure $ Tag str loc
Eq (i, ty) s t loc =>
Eq <$> fromPTermDScope ds ns [< i] ty
<*> fromPTermWith ds ns s
<*> fromPTermWith ds ns t
<*> pure loc
DLam i s loc =>
DLam <$> fromPTermDScope ds ns [< i] s <*> pure loc
DApp s p loc =>
map E $ DApp
<$> fromPTermElim ds ns s
<*> fromPDimWith ds p
<*> pure loc
BOX q ty loc => BOX (fromPQty q) <$> fromPTermWith ds ns ty <*> pure loc
Box val loc => Box <$> fromPTermWith ds ns val <*> pure loc
Case pi box (r, ret) (CaseBox b body _) loc =>
map E $ CaseBox (fromPQty pi)
<$> fromPTermElim ds ns box
<*> fromPTermTScope ds ns [< r] ret
<*> fromPTermTScope ds ns [< b] body
<*> pure loc
V x u loc => fromV ds ns x u loc
Ann s a loc =>
map E $ Ann
<$> fromPTermWith ds ns s
<*> fromPTermWith ds ns a
<*> pure loc
Coe (i, ty) p q val loc =>
map E $ Coe
<$> fromPTermDScope ds ns [< i] ty
<*> fromPDimWith ds p
<*> fromPDimWith ds q
<*> fromPTermWith ds ns val
<*> pure loc
Comp (i, ty) p q val r (j0, val0) (j1, val1) loc =>
map E $ CompH'
<$> fromPTermDScope ds ns [< i] ty
<*> fromPDimWith ds p
<*> fromPDimWith ds q
<*> fromPTermWith ds ns val
<*> fromPDimWith ds r
<*> fromPTermDScope ds ns [< j0] val0
<*> fromPTermDScope ds ns [< j1] val1
<*> pure loc
private
fromPTermEnumArms : Context' PatVar d -> Context' PatVar n ->
List (PTagVal, PTerm) ->
Eff FromParserPure (CaseEnumArms d n)
fromPTermEnumArms ds ns =
map SortedMap.fromList .
traverse (bitraverse (pure . fromPTagVal) (fromPTermWith ds ns))
private
fromPTermElim : Context' PatVar d -> Context' PatVar n ->
PTerm -> Eff FromParserPure (Elim d n)
fromPTermElim ds ns e =
case !(fromPTermWith ds ns e) of
E e => pure e
t => let ctx = MkNameContexts (map fromPatVar ds) (map fromPatVar ns) in
throw $ AnnotationNeeded t.loc ctx t
-- [todo] use SN if the var is named but still unused
private
fromPTermTScope : {s : Nat} -> Context' PatVar d -> Context' PatVar n ->
SnocVect s PatVar -> PTerm ->
Eff FromParserPure (ScopeTermN s d n)
fromPTermTScope ds ns xs t =
if all isUnused xs then
SN <$> fromPTermWith ds ns t
else
ST (fromSnocVect $ map fromPatVar xs) <$> fromPTermWith ds (ns ++ xs) t
private
fromPTermDScope : {s : Nat} -> Context' PatVar d -> Context' PatVar n ->
SnocVect s PatVar -> PTerm ->
Eff FromParserPure (DScopeTermN s d n)
fromPTermDScope ds ns xs t =
if all isUnused xs then
SN <$> fromPTermWith ds ns t
else
DST (fromSnocVect $ map fromPatVar xs) <$> fromPTermWith (ds ++ xs) ns t
export %inline
fromPTerm : PTerm -> Eff FromParserPure (Term 0 0)
fromPTerm = fromPTermWith [<] [<]
export
globalPQty : Loc -> (q : Qty) -> Eff [Except Error] (So $ isGlobal q)
globalPQty loc pi = case choose $ isGlobal pi of
Left y => pure y
Right _ => throw $ QtyNotGlobal loc pi
export
fromPBaseNameNS : PBaseName -> Eff [StateL NS Mods] Name
fromPBaseNameNS name = pure $ addMods !(getAt NS) $ fromPBaseName name
private
liftTC : TC a -> Eff FromParserPure a
liftTC act = do
res <- lift $ runExcept $ runReaderAt DEFS !(getAt DEFS) act
rethrow $ mapFst WrapTypeError res
export covering
fromPDef : PDefinition -> Eff FromParserPure NDefinition
fromPDef (MkPDef qty pname ptype pterm defLoc) = do
name <- lift $ fromPBaseNameNS pname
qtyGlobal <- lift $ globalPQty qty.loc qty.val
let gqty = Element qty.val qtyGlobal
sqty = globalToSubj gqty
type <- lift $ traverse fromPTerm ptype
term <- lift $ fromPTerm pterm
case type of
Just type => do
liftTC $ checkTypeC empty type Nothing
liftTC $ ignore $ checkC empty sqty term type
let def = mkDef gqty type term defLoc
modifyAt DEFS $ insert name def
pure (name, def)
Nothing => do
let E elim = term | _ => throw $ AnnotationNeeded term.loc empty term
res <- liftTC $ inferC empty sqty elim
let def = mkDef gqty res.type term defLoc
modifyAt DEFS $ insert name def
pure (name, def)
export covering
fromPDecl : PDecl -> Eff FromParserPure (List NDefinition)
fromPDecl (PDef def) = singleton <$> fromPDef def
fromPDecl (PNs ns) =
localAt NS (<+> ns.name) $ concat <$> traverse fromPDecl ns.decls
export covering
loadFile : Loc -> String -> Eff LoadFile (Maybe String)
loadFile loc file =
if contains file !(getAt SEEN) then
pure Nothing
else do
Just ifile <- firstExists (map (</> file) !ask)
| Nothing => throw $ LoadError loc file FileNotFound
case !(readFile ifile) of
Right res => modifyAt SEEN (insert file) $> Just res
Left err => throw $ LoadError loc ifile err
mutual
export covering
loadProcessFile : Loc -> String -> Eff FromParserIO (List NDefinition)
loadProcessFile loc file =
case !(lift $ loadFile loc file) of
Just inp => do
tl <- either (throw . WrapParseError file) pure $ lexParseInput file inp
concat <$> traverse fromPTopLevel tl
Nothing => pure []
||| populates the `defs` field of the state
export covering
fromPTopLevel : PTopLevel -> Eff FromParserIO (List NDefinition)
fromPTopLevel (PD decl) = lift $ fromPDecl decl
fromPTopLevel (PLoad file loc) = loadProcessFile loc file
export
fromParserPure : NameSuf -> Definitions ->
Eff FromParserPure a ->
(Either Error (a, Definitions), NameSuf)
fromParserPure suf defs act =
extract $
runStateAt GEN suf $
runExcept $
evalStateAt NS [<] $
runStateAt DEFS defs act
export
fromParserIO : (MonadRec io, HasIO io) =>
IncludePath ->
IORef SeenFiles -> IORef NameSuf -> IORef Definitions ->
Eff FromParserIO a -> io (Either Error a)
fromParserIO inc seen suf defs act =
runIO $
runStateIORefAt GEN suf $
runExcept $
evalStateAt NS [<] $
runStateIORefAt SEEN seen $
runStateIORefAt DEFS defs $
runReader inc act