{-# Language BlockArguments #-} {-# Language OverloadedStrings #-} {-# Language RecordWildCards #-} module Cryptol.REPL.Help (helpForNamed) where import Data.Text (Text) import qualified Data.Text as Text import Data.Map (Map) import qualified Data.Map as Map import qualified Data.Set as Set import Data.Maybe(fromMaybe) import Data.List(intersperse) import Control.Monad(when,guard,unless,msum,mplus) import Cryptol.Utils.PP import Cryptol.Utils.Ident(OrigName(..),identIsNormal) import qualified Cryptol.Parser.AST as P import qualified Cryptol.ModuleSystem as M import qualified Cryptol.ModuleSystem.Name as M import qualified Cryptol.ModuleSystem.NamingEnv as M import qualified Cryptol.ModuleSystem.Env as M import qualified Cryptol.ModuleSystem.Interface as M import qualified Cryptol.ModuleSystem.Renamer.Error as M (ModKind(..)) import qualified Cryptol.TypeCheck.AST as T import Cryptol.TypeCheck.PP(emptyNameMap,ppWithNames) import Cryptol.REPL.Monad helpForNamed :: P.PName -> REPL () helpForNamed qname = do fe <- getFocusedEnv let params = M.mctxParams fe env = M.mctxDecls fe rnEnv = M.mctxNames fe disp = M.mctxNameDisp fe vNames = M.lookupListNS M.NSValue qname rnEnv cNames = M.lookupListNS M.NSConstructor qname rnEnv tNames = M.lookupListNS M.NSType qname rnEnv mNames = M.lookupListNS M.NSModule qname rnEnv let helps = map (showTypeHelp params env disp) tNames ++ map (showValHelp params env disp qname) vNames ++ map (showConHelp env disp qname) cNames ++ map (showModHelp env disp) mNames separ = rPutStrLn " ---------" sequence_ (intersperse separ helps) when (null (vNames ++ cNames ++ tNames ++ mNames)) $ rPrint $ "Undefined name:" <+> pp qname noInfo :: NameDisp -> M.Name -> REPL () noInfo nameEnv name = case M.nameInfo name of M.GlobalName _ og -> rPrint (runDoc nameEnv ("Name defined in module" <+> pp (ogModule og))) M.LocalName {} -> rPutStrLn "// No documentation is available." -- | Show help for something in the module namespace. showModHelp :: M.IfaceDecls -> NameDisp -> M.Name -> REPL () showModHelp env nameEnv name = fromMaybe (noInfo nameEnv name) $ msum [ attempt M.ifModules showModuleHelp , attempt M.ifFunctors showFunctorHelp , attempt M.ifSignatures showSigHelp ] where attempt :: (M.IfaceDecls -> Map M.Name a) -> (M.IfaceDecls -> NameDisp -> M.Name -> a -> REPL ()) -> Maybe (REPL ()) attempt inMap doShow = do th <- Map.lookup name (inMap env) pure (doShow env nameEnv name th) showModuleHelp :: M.IfaceDecls -> NameDisp -> M.Name -> M.IfaceNames M.Name -> REPL () showModuleHelp env _nameEnv name info = showSummary M.AModule name (M.ifsDoc info) (ifaceSummary env info) ifaceSummary :: M.IfaceDecls -> M.IfaceNames M.Name -> ModSummary ifaceSummary env info = foldr addName emptySummary (Set.toList (M.ifsPublic info)) where addName x ns = fromMaybe ns $ msum [ addT <$> msum [fromTS, fromNT ] , addV <$> fromD , addM <$> msum [ fromM, fromS, fromF ] ] where addT (k,d) = ns { msTypes = T.ModTParam { T.mtpName = x , T.mtpKind = k , T.mtpDoc = d } : msTypes ns } addV (t,d,f) = ns { msVals = T.ModVParam { T.mvpName = x , T.mvpType = t , T.mvpDoc = d , T.mvpFixity = f } : msVals ns } addM (k,d)= ns { msMods = (x, k, d) : msMods ns } fromTS = do def <- Map.lookup x (M.ifTySyns env) pure (T.kindOf def, T.tsDoc def) fromNT = do def <- Map.lookup x (M.ifNominalTypes env) pure (T.kindOf def, T.ntDoc def) fromD = do def <- Map.lookup x (M.ifDecls env) pure (M.ifDeclSig def, M.ifDeclDoc def, M.ifDeclFixity def) fromM = do def <- Map.lookup x (M.ifModules env) pure (M.AModule, M.ifsDoc def) fromF = do def <- Map.lookup x (M.ifFunctors env) pure (M.AFunctor, M.ifsDoc (M.ifNames def)) fromS = do def <- Map.lookup x (M.ifSignatures env) pure (M.ASignature, T.mpnDoc def) showFunctorHelp :: M.IfaceDecls -> NameDisp -> M.Name -> M.IfaceG M.Name -> REPL () showFunctorHelp _env _nameEnv name info = showSummary M.AFunctor name (M.ifsDoc ns) summary where ns = M.ifNames info summary = (ifaceSummary (M.ifDefines info) ns) { msParams = [ (T.mpName p, T.mpIface p) | p <- Map.elems (M.ifParams info) ] } showSigHelp :: M.IfaceDecls -> NameDisp -> M.Name -> T.ModParamNames -> REPL () showSigHelp _env _nameEnv name info = showSummary M.ASignature name (T.mpnDoc info) emptySummary { msTypes = Map.elems (T.mpnTypes info) , msVals = Map.elems (T.mpnFuns info) , msConstraints = map P.thing (T.mpnConstraints info) } -------------------------------------------------------------------------------- data ModSummary = ModSummary { msParams :: [(P.Ident, P.ImpName M.Name)] , msConstraints :: [T.Prop] , msTypes :: [T.ModTParam] , msVals :: [T.ModVParam] , msMods :: [ (M.Name, M.ModKind, Maybe Text) ] } emptySummary :: ModSummary emptySummary = ModSummary { msParams = [] , msConstraints = [] , msTypes = [] , msVals = [] , msMods = [] } showSummary :: M.ModKind -> M.Name -> Maybe Text -> ModSummary -> REPL () showSummary k name doc info = do rPutStrLn "" rPrint $ runDoc disp case k of M.AModule -> vcat [ "Module" <+> pp name <+> "exports:" , indent 2 $ vcat [ ppTPs, ppFPs ] ] M.ASignature -> vcat [ "Interface" <+> pp name <+> "requires:" , indent 2 $ vcat [ ppTPs, ppCtrs, ppFPs ] ] M.AFunctor -> vcat [ "Parameterized module" <+> pp name <+> "requires:" , indent 2 $ ppPs , " ", "and exports:" , indent 2 $ vcat [ ppTPs, ppFPs ] ] doShowDocString doc where -- qualifying stuff is too noisy disp = NameDisp \_ -> Just UnQualified withMaybeNest mb x = case mb of Nothing -> x Just d -> vcat [x, indent 2 d] withDoc mb = withMaybeNest (pp <$> mb) withFix mb = withMaybeNest (text . ppFixity <$> mb) ppMany xs = case xs of [] -> mempty _ -> vcat (" " : xs) ppPs = ppMany (map ppP (msParams info)) ppP (x,y) | identIsNormal x = pp x <+> ": interface" <+> pp y | otherwise = "(anonymous parameter)" ppTPs = ppMany (map ppTP (msTypes info)) ppTP x = withDoc (T.mtpDoc x) $ hsep ["type", pp (T.mtpName x), ":", pp (T.mtpKind x)] ppCtrs = ppMany (map pp (msConstraints info)) ppFPs = ppMany (map ppFP (msVals info)) ppFP x = withFix (T.mvpFixity x) $ withDoc (T.mvpDoc x) $ hsep [pp (T.mvpName x), ":" <+> pp (T.mvpType x) ] -------------------------------------------------------------------------------- showTypeHelp :: M.ModContextParams -> M.IfaceDecls -> NameDisp -> T.Name -> REPL () showTypeHelp ctxparams env nameEnv name = fromMaybe (noInfo nameEnv name) $ msum [ fromTySyn, fromNominal, fromTyParam ] where fromTySyn = do ts <- msum [ Map.lookup name (M.ifTySyns env) , Map.lookup name (T.mpnTySyn (M.modContextParamNames ctxparams)) ] return (doShowTyHelp nameEnv (pp ts) (T.tsDoc ts)) fromNominal = do nt <- Map.lookup name (M.ifNominalTypes env) let decl kw = vcat [ kw <+> pp (T.ntName nt) <.> ":" <+> pp (T.kindOf nt) , "" , "Constructors:" <+> commaSep (map (pp . fst) (T.nominalTypeConTypes nt)) ] case T.ntDef nt of T.Struct {} -> pure $ doShowTyHelp nameEnv (decl "newtype") (T.ntDoc nt) T.Enum {} -> pure $ doShowTyHelp nameEnv (decl "enum") (T.ntDoc nt) T.Abstract -> pure (primTypeHelp nt) primTypeHelp nt = do rPutStrLn "" rPrint $ runDoc nameEnv $ nest 4 $ "primitive type" <+> pp (T.ntName nt) <+> ":" <+> pp (T.kindOf nt) let vs = T.ntParams nt let cs = T.ntConstraints nt unless (null cs) $ do let example = T.TNominal nt (map (T.TVar . T.tpVar) vs) ns = T.addTNames vs emptyNameMap rs = [ "•" <+> ppWithNames ns c | c <- cs ] rPutStrLn "" rPrint $ runDoc nameEnv $ indent 4 $ backticks (ppWithNames ns example) <+> "requires:" $$ indent 2 (vcat rs) doShowFix (T.ntFixity nt) doShowDocString (T.ntDoc nt) allParamNames = case ctxparams of M.NoParams -> mempty M.FunctorParams fparams -> Map.unions [ (\x -> (Just p,x)) <$> T.mpnTypes (T.mpParameters ps) | (p, ps) <- Map.toList fparams ] M.InterfaceParams ps -> (\x -> (Nothing ,x)) <$> T.mpnTypes ps fromTyParam = do (x,p) <- Map.lookup name allParamNames pure do rPutStrLn "" case x of Just src -> doShowParameterSource src Nothing -> pure () let ty = "type" <+> pp name <+> ":" <+> pp (T.mtpKind p) rPrint (runDoc nameEnv (indent 4 ty)) doShowDocString (T.mtpDoc p) doShowTyHelp :: NameDisp -> Doc -> Maybe Text -> REPL () doShowTyHelp nameEnv decl doc = do rPutStrLn "" rPrint (runDoc nameEnv (nest 4 decl)) doShowDocString doc showConHelp :: M.IfaceDecls -> NameDisp -> P.PName -> T.Name -> REPL () showConHelp env nameEnv qname name = fromMaybe (noInfo nameEnv name) (Map.lookup name allCons) where allCons = foldr addCons mempty (M.ifNominalTypes env) where getDocs nt = case T.ntDef nt of T.Struct {} -> [ Nothing ] T.Enum cs -> map (Just . T.ecDoc) cs T.Abstract -> [] addCons nt mp = foldr (addCon nt) mp (zip (T.nominalTypeConTypes nt) (getDocs nt)) addCon nt ((c,t),d) = Map.insert c $ do rPutStrLn "" rPrint (runDoc nameEnv $ vcat [ "Constructor of" <+> pp (T.ntName nt) , indent 4 $ hsep [ pp qname, ":", pp t ] ]) maybe (pure ()) doShowDocString d showValHelp :: M.ModContextParams -> M.IfaceDecls -> NameDisp -> P.PName -> T.Name -> REPL () showValHelp ctxparams env nameEnv qname name = fromMaybe (noInfo nameEnv name) (msum [ fromDecl, fromParameter ]) where fromDecl = do M.IfaceDecl { .. } <- Map.lookup name (M.ifDecls env) return $ do rPutStrLn "" let property | P.PragmaProperty `elem` ifDeclPragmas = [text "property"] | otherwise = [] rPrint $ runDoc nameEnv $ indent 4 $ hsep $ property ++ [pp qname, colon, pp (ifDeclSig)] doShowFix $ ifDeclFixity `mplus` (guard ifDeclInfix >> return P.defaultFixity) doShowDocString ifDeclDoc allParamNames = case ctxparams of M.NoParams -> mempty M.FunctorParams fparams -> Map.unions [ (\x -> (Just p,x)) <$> T.mpnFuns (T.mpParameters ps) | (p, ps) <- Map.toList fparams ] M.InterfaceParams ps -> (\x -> (Nothing,x)) <$> T.mpnFuns ps fromParameter = do (x,p) <- Map.lookup name allParamNames pure do rPutStrLn "" case x of Just src -> doShowParameterSource src Nothing -> pure () let ty = pp name <+> ":" <+> pp (T.mvpType p) rPrint (runDoc nameEnv (indent 4 ty)) doShowFix (T.mvpFixity p) doShowDocString (T.mvpDoc p) doShowParameterSource :: P.Ident -> REPL () doShowParameterSource i = do rPutStrLn (Text.unpack msg) rPutStrLn "" where msg | identIsNormal i = "Provided by module parameter " <> P.identText i <> "." | otherwise = "Provided by `parameters` declaration." doShowDocString :: Maybe Text -> REPL () doShowDocString doc = case doc of Nothing -> pure () Just d -> rPutStrLn ('\n' : Text.unpack d) ppFixity :: T.Fixity -> String ppFixity f = "Precedence " ++ show (P.fLevel f) ++ ", " ++ case P.fAssoc f of P.LeftAssoc -> "associates to the left." P.RightAssoc -> "associates to the right." P.NonAssoc -> "does not associate." doShowFix :: Maybe T.Fixity -> REPL () doShowFix fx = case fx of Just f -> rPutStrLn ('\n' : ppFixity f) Nothing -> return ()