formatting: FillSig.hs
This commit is contained in:
Daniel Gröber
parent
a0289420f9
commit
b96ef00248
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@ -1,4 +1,5 @@
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{-# LANGUAGE MultiParamTypeClasses, FunctionalDependencies, FlexibleInstances, CPP #-}
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{-# LANGUAGE CPP, MultiParamTypeClasses, FunctionalDependencies #-}
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{-# LANGUAGE FlexibleInstances #-}
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module Language.Haskell.GhcMod.FillSig (
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sig
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@ -12,7 +13,8 @@ import Data.List (find, nub, sortBy)
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import qualified Data.Map as M
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import Data.Maybe (isJust, catMaybes)
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import Exception (ghandle, SomeException(..))
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import GHC (GhcMonad, Id, ParsedModule(..), TypecheckedModule(..), DynFlags, SrcSpan, Type, GenLocated(L))
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import GHC (GhcMonad, Id, ParsedModule(..), TypecheckedModule(..), DynFlags,
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SrcSpan, Type, GenLocated(L))
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import qualified GHC as G
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import qualified Name as G
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import qualified Language.Haskell.GhcMod.Gap as Gap
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@ -34,13 +36,19 @@ import Djinn.GHC
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----------------------------------------------------------------
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-- Possible signatures we can find: function or instance
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data SigInfo = Signature SrcSpan [G.RdrName] (G.HsType G.RdrName)
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| InstanceDecl SrcSpan G.Class
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| TyFamDecl SrcSpan G.RdrName TyFamType {- True if closed -} [G.RdrName]
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data SigInfo
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= Signature SrcSpan [G.RdrName] (G.HsType G.RdrName)
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| InstanceDecl SrcSpan G.Class
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| TyFamDecl SrcSpan G.RdrName TyFamType {- True if closed -} [G.RdrName]
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-- Signature for fallback operation via haskell-src-exts
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data HESigInfo = HESignature HE.SrcSpan [HE.Name HE.SrcSpanInfo] (HE.Type HE.SrcSpanInfo)
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| HEFamSignature HE.SrcSpan TyFamType (HE.Name HE.SrcSpanInfo) [HE.Name HE.SrcSpanInfo]
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data HESigInfo
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= HESignature HE.SrcSpan [HE.Name HE.SrcSpanInfo] (HE.Type HE.SrcSpanInfo)
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| HEFamSignature
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HE.SrcSpan
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TyFamType
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(HE.Name HE.SrcSpanInfo)
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[HE.Name HE.SrcSpanInfo]
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data TyFamType = Closed | Open | Data
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initialTyFamString :: TyFamType -> (String, String)
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@ -156,21 +164,25 @@ getSignatureFromHE file lineNo colNo = do
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----------------------------------------------------------------
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-- b. Code for generating initial code
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-- A list of function arguments, and whether they are functions or normal arguments
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-- is built from either a function signature or an instance signature
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-- A list of function arguments, and whether they are functions or normal
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-- arguments is built from either a function signature or an instance signature
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data FnArg = FnArgFunction | FnArgNormal | FnExplicitName String
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initialBody :: FnArgsInfo ty name => DynFlags -> PprStyle -> ty -> name -> String
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initialBody dflag style ty name = initialBody' (getFnName dflag style name) (getFnArgs ty)
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initialBody dflag style ty name =
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initialBody' (getFnName dflag style name) (getFnArgs ty)
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initialBody' :: String -> [FnArg] -> String
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initialBody' fname args = initialHead fname args ++ " = "
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++ (if isSymbolName fname then "" else '_':fname) ++ "_body"
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initialBody' fname args =
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initialHead fname args ++ " = " ++ n ++ "_body"
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where n = if isSymbolName fname then "" else '_':fname
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initialFamBody :: FnArgsInfo ty name => DynFlags -> PprStyle -> name -> [name] -> String
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initialFamBody dflag style name args = initialHead (getFnName dflag style name)
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(map (FnExplicitName . getFnName dflag style) args)
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++ " = ()"
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initialFamBody :: FnArgsInfo ty name
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=> DynFlags -> PprStyle -> name -> [name] -> String
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initialFamBody dflag style name args =
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initialHead fnName fnArgs ++ " = ()"
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where fnName = getFnName dflag style name
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fnArgs = map (FnExplicitName . getFnName dflag style) args
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initialHead :: String -> [FnArg] -> String
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initialHead fname args =
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@ -185,7 +197,8 @@ initialBodyArgs [] _ _ = []
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initialBodyArgs (FnArgFunction:xs) vs (f:fs) = f : initialBodyArgs xs vs fs
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initialBodyArgs (FnArgNormal:xs) (v:vs) fs = v : initialBodyArgs xs vs fs
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initialBodyArgs (FnExplicitName n:xs) vs fs = n : initialBodyArgs xs vs fs
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initialBodyArgs _ _ _ = error "This should never happen" -- Lists are infinite
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initialBodyArgs _ _ _ =
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error "initialBodyArgs: This should never happen" -- Lists are infinite
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initialHead1 :: String -> [FnArg] -> [String] -> String
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initialHead1 fname args elts =
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@ -211,7 +224,8 @@ instance FnArgsInfo (G.HsType G.RdrName) (G.RdrName) where
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getFnName dflag style name = showOccName dflag style $ Gap.occName name
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getFnArgs (G.HsForAllTy _ _ _ (L _ iTy)) = getFnArgs iTy
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getFnArgs (G.HsParTy (L _ iTy)) = getFnArgs iTy
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getFnArgs (G.HsFunTy (L _ lTy) (L _ rTy)) = (if fnarg lTy then FnArgFunction else FnArgNormal):getFnArgs rTy
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getFnArgs (G.HsFunTy (L _ lTy) (L _ rTy)) =
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(if fnarg lTy then FnArgFunction else FnArgNormal):getFnArgs rTy
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where fnarg ty = case ty of
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(G.HsForAllTy _ _ _ (L _ iTy)) -> fnarg iTy
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(G.HsParTy (L _ iTy)) -> fnarg iTy
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@ -224,7 +238,8 @@ instance FnArgsInfo (HE.Type HE.SrcSpanInfo) (HE.Name HE.SrcSpanInfo) where
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getFnName _ _ (HE.Symbol _ s) = s
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getFnArgs (HE.TyForall _ _ _ iTy) = getFnArgs iTy
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getFnArgs (HE.TyParen _ iTy) = getFnArgs iTy
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getFnArgs (HE.TyFun _ lTy rTy) = (if fnarg lTy then FnArgFunction else FnArgNormal):getFnArgs rTy
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getFnArgs (HE.TyFun _ lTy rTy) =
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(if fnarg lTy then FnArgFunction else FnArgNormal):getFnArgs rTy
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where fnarg ty = case ty of
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(HE.TyForall _ _ _ iTy) -> fnarg iTy
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(HE.TyParen _ iTy) -> fnarg iTy
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@ -239,7 +254,10 @@ instance FnArgsInfo Type Id where
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maybe (if Ty.isPredTy lTy then getFnArgs' rTy else FnArgNormal:getFnArgs' rTy)
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(\_ -> FnArgFunction:getFnArgs' rTy)
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$ Ty.splitFunTy_maybe lTy
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getFnArgs' ty | Just (_,iTy) <- Ty.splitForAllTy_maybe ty = getFnArgs' iTy
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getFnArgs' ty | Just (_,iTy) <- Ty.splitForAllTy_maybe ty =
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getFnArgs' iTy
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getFnArgs' _ = []
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-- Infinite supply of variable and function variable names
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@ -247,7 +265,9 @@ infiniteVars, infiniteFns :: [String]
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infiniteVars = infiniteSupply ["x","y","z","t","u","v","w"]
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infiniteFns = infiniteSupply ["f","g","h"]
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infiniteSupply :: [String] -> [String]
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infiniteSupply initialSupply = initialSupply ++ concatMap (\n -> map (\v -> v ++ show n) initialSupply) ([1 .. ] :: [Integer])
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infiniteSupply initialSupply =
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initialSupply ++ concatMap (\n -> map (\v -> v ++ show n) initialSupply)
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([1 .. ] :: [Integer])
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-- Check whether a String is a symbol name
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isSymbolName :: String -> Bool
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@ -273,14 +293,15 @@ refine file lineNo colNo expr = ghandle handler body
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p <- G.parseModule modSum
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tcm@TypecheckedModule{tm_typechecked_source = tcs} <- G.typecheckModule p
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ety <- G.exprType expr
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whenFound opt (findVar dflag style tcm tcs lineNo colNo) $ \(loc, name, rty, paren) ->
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let eArgs = getFnArgs ety
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rArgs = getFnArgs rty
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diffArgs' = length eArgs - length rArgs
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diffArgs = if diffArgs' < 0 then 0 else diffArgs'
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iArgs = take diffArgs eArgs
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text = initialHead1 expr iArgs (infinitePrefixSupply name)
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in (fourInts loc, doParen paren text)
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whenFound opt (findVar dflag style tcm tcs lineNo colNo) $
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\(loc, name, rty, paren) ->
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let eArgs = getFnArgs ety
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rArgs = getFnArgs rty
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diffArgs' = length eArgs - length rArgs
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diffArgs = if diffArgs' < 0 then 0 else diffArgs'
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iArgs = take diffArgs eArgs
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text = initialHead1 expr iArgs (infinitePrefixSupply name)
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in (fourInts loc, doParen paren text)
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handler (SomeException _) = emptyResult =<< options
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@ -289,14 +310,16 @@ findVar :: GhcMonad m => DynFlags -> PprStyle
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-> G.TypecheckedModule -> G.TypecheckedSource
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-> Int -> Int -> m (Maybe (SrcSpan, String, Type, Bool))
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findVar dflag style tcm tcs lineNo colNo =
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let lst = sortBy (cmp `on` G.getLoc) $ listifySpans tcs (lineNo, colNo) :: [G.LHsExpr Id]
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let lst = sortBy (cmp `on` G.getLoc) $
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listifySpans tcs (lineNo, colNo) :: [G.LHsExpr Id]
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in case lst of
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e@(L _ (G.HsVar i)):others ->
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do tyInfo <- Gap.getType tcm e
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let name = getFnName dflag style i
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if (name == "undefined" || head name == '_') && isJust tyInfo
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then let Just (s,t) = tyInfo
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b = case others of -- If inside an App, we need parenthesis
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b = case others of -- If inside an App, we need
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-- parenthesis
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[] -> False
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L _ (G.HsApp (L _ a1) (L _ a2)):_ ->
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isSearchedVar i a1 || isSearchedVar i a2
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@ -333,24 +356,29 @@ auto file lineNo colNo = ghandle handler body
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opt <- options
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modSum <- Gap.fileModSummary file
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p <- G.parseModule modSum
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tcm@TypecheckedModule{tm_typechecked_source = tcs
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,tm_checked_module_info = minfo} <- G.typecheckModule p
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tcm@TypecheckedModule {
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tm_typechecked_source = tcs
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, tm_checked_module_info = minfo
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} <- G.typecheckModule p
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whenFound' opt (findVar dflag style tcm tcs lineNo colNo) $ \(loc, _name, rty, paren) -> do
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topLevel <- getEverythingInTopLevel minfo
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let (f,pats) = getPatsForVariable tcs (lineNo,colNo)
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-- Remove self function to prevent recursion, and id to trim cases
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-- Remove self function to prevent recursion, and id to trim
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-- cases
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filterFn (n,_) = let funName = G.getOccString n
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recName = G.getOccString (G.getName f)
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in funName `notElem` recName:notWantedFuns
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-- Find without using other functions in top-level
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localBnds = M.unions $ map (\(L _ pat) -> getBindingsForPat pat) pats
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localBnds = M.unions $
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map (\(L _ pat) -> getBindingsForPat pat) pats
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lbn = filter filterFn (M.toList localBnds)
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djinnsEmpty <- djinn True (Just minfo) lbn rty (Max 10) 100000
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let -- Find with the entire top-level
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almostEnv = M.toList $ M.union localBnds topLevel
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env = filter filterFn almostEnv
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djinns <- djinn True (Just minfo) env rty (Max 10) 100000
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return (fourInts loc, map (doParen paren) $ nub (djinnsEmpty ++ djinns))
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return ( fourInts loc
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, map (doParen paren) $ nub (djinnsEmpty ++ djinns))
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handler (SomeException _) = emptyResult =<< options
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@ -372,7 +400,8 @@ getEverythingInTopLevel m = do
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tyThingsToInfo :: [Ty.TyThing] -> M.Map G.Name Type
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tyThingsToInfo [] = M.empty
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tyThingsToInfo (G.AnId i : xs) = M.insert (G.getName i) (Ty.varType i) (tyThingsToInfo xs)
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tyThingsToInfo (G.AnId i : xs) =
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M.insert (G.getName i) (Ty.varType i) (tyThingsToInfo xs)
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-- Getting information about constructors is not needed
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-- because they will be added by djinn-ghc when traversing types
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-- #if __GLASGOW_HASKELL__ >= 708
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@ -385,7 +414,8 @@ tyThingsToInfo (_:xs) = tyThingsToInfo xs
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-- Find the Id of the function and the pattern where the hole is located
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getPatsForVariable :: G.TypecheckedSource -> (Int,Int) -> (Id, [Ty.LPat Id])
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getPatsForVariable tcs (lineNo, colNo) =
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let (L _ bnd:_) = sortBy (cmp `on` G.getLoc) $ listifySpans tcs (lineNo, colNo) :: [G.LHsBind Id]
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let (L _ bnd:_) = sortBy (cmp `on` G.getLoc) $
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listifySpans tcs (lineNo, colNo) :: [G.LHsBind Id]
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in case bnd of
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G.PatBind { Ty.pat_lhs = L ploc pat } -> case pat of
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Ty.ConPatIn (L _ i) _ -> (i, [L ploc pat])
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@ -405,25 +435,34 @@ getBindingsForPat :: Ty.Pat Id -> M.Map G.Name Type
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getBindingsForPat (Ty.VarPat i) = M.singleton (G.getName i) (Ty.varType i)
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getBindingsForPat (Ty.LazyPat (L _ l)) = getBindingsForPat l
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getBindingsForPat (Ty.BangPat (L _ b)) = getBindingsForPat b
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getBindingsForPat (Ty.AsPat (L _ a) (L _ i)) = M.insert (G.getName a) (Ty.varType a) (getBindingsForPat i)
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getBindingsForPat (Ty.AsPat (L _ a) (L _ i)) =
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M.insert (G.getName a) (Ty.varType a) (getBindingsForPat i)
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#if __GLASGOW_HASKELL__ >= 708
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getBindingsForPat (Ty.ListPat l _ _) = M.unions $ map (\(L _ i) -> getBindingsForPat i) l
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getBindingsForPat (Ty.ListPat l _ _) =
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M.unions $ map (\(L _ i) -> getBindingsForPat i) l
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#else
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getBindingsForPat (Ty.ListPat l _) = M.unions $ map (\(L _ i) -> getBindingsForPat i) l
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getBindingsForPat (Ty.ListPat l _) =
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M.unions $ map (\(L _ i) -> getBindingsForPat i) l
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#endif
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getBindingsForPat (Ty.TuplePat l _ _) = M.unions $ map (\(L _ i) -> getBindingsForPat i) l
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getBindingsForPat (Ty.PArrPat l _) = M.unions $ map (\(L _ i) -> getBindingsForPat i) l
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getBindingsForPat (Ty.TuplePat l _ _) =
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M.unions $ map (\(L _ i) -> getBindingsForPat i) l
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getBindingsForPat (Ty.PArrPat l _) =
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M.unions $ map (\(L _ i) -> getBindingsForPat i) l
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getBindingsForPat (Ty.ViewPat _ (L _ i) _) = getBindingsForPat i
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getBindingsForPat (Ty.SigPatIn (L _ i) _) = getBindingsForPat i
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getBindingsForPat (Ty.SigPatOut (L _ i) _) = getBindingsForPat i
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getBindingsForPat (Ty.ConPatIn (L _ i) d) = M.insert (G.getName i) (Ty.varType i) (getBindingsForRecPat d)
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getBindingsForPat (Ty.ConPatIn (L _ i) d) =
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M.insert (G.getName i) (Ty.varType i) (getBindingsForRecPat d)
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getBindingsForPat (Ty.ConPatOut { Ty.pat_args = d }) = getBindingsForRecPat d
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getBindingsForPat _ = M.empty
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getBindingsForRecPat :: Ty.HsConPatDetails Id -> M.Map G.Name Type
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getBindingsForRecPat (Ty.PrefixCon args) = M.unions $ map (\(L _ i) -> getBindingsForPat i) args
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getBindingsForRecPat (Ty.InfixCon (L _ a1) (L _ a2)) = M.union (getBindingsForPat a1) (getBindingsForPat a2)
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getBindingsForRecPat (Ty.RecCon (Ty.HsRecFields { Ty.rec_flds = fields })) = getBindingsForRecFields fields
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where getBindingsForRecFields [] = M.empty
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getBindingsForRecFields (Ty.HsRecField { Ty.hsRecFieldArg = (L _ a) } : fs) =
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M.union (getBindingsForPat a) (getBindingsForRecFields fs)
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getBindingsForRecPat (Ty.PrefixCon args) =
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M.unions $ map (\(L _ i) -> getBindingsForPat i) args
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getBindingsForRecPat (Ty.InfixCon (L _ a1) (L _ a2)) =
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M.union (getBindingsForPat a1) (getBindingsForPat a2)
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getBindingsForRecPat (Ty.RecCon (Ty.HsRecFields { Ty.rec_flds = fields })) =
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getBindingsForRecFields fields
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where getBindingsForRecFields [] = M.empty
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getBindingsForRecFields (Ty.HsRecField {Ty.hsRecFieldArg = (L _ a)}:fs) =
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M.union (getBindingsForPat a) (getBindingsForRecFields fs)
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