ghc-9.13: The GHC API
Copyright(c) The University of Glasgow 1992-2023
Safe HaskellNone
LanguageGHC2021

GHC.Hs.Utils

Description

Here we collect a variety of helper functions that construct or analyse HsSyn. All these functions deal with generic HsSyn; functions which deal with the instantiated versions are located elsewhere:

Parameterised by Module ---------------- ------------- GhcPs/RdrName GHC.Parser.PostProcess GhcRn/Name GHC.Rename.* GhcTc/Id GHC.Tc.Zonk.Type

The mk* functions attempt to construct a not-completely-useless SrcSpan from their components, compared with the nl* functions which just attach noSrcSpan to everything.

Synopsis

Terms

mkHsPar :: forall (p :: Pass). IsPass p => LHsExpr (GhcPass p) -> LHsExpr (GhcPass p) Source #

e => (e)

mkHsApp :: forall (id :: Pass). LHsExpr (GhcPass id) -> LHsExpr (GhcPass id) -> LHsExpr (GhcPass id) Source #

mkHsAppWith :: forall (id :: Pass). (LHsExpr (GhcPass id) -> LHsExpr (GhcPass id) -> HsExpr (GhcPass id) -> LHsExpr (GhcPass id)) -> LHsExpr (GhcPass id) -> LHsExpr (GhcPass id) -> LHsExpr (GhcPass id) Source #

mkHsApps :: forall (id :: Pass). LHsExpr (GhcPass id) -> [LHsExpr (GhcPass id)] -> LHsExpr (GhcPass id) Source #

mkHsAppsWith :: forall (id :: Pass). (LHsExpr (GhcPass id) -> LHsExpr (GhcPass id) -> HsExpr (GhcPass id) -> LHsExpr (GhcPass id)) -> LHsExpr (GhcPass id) -> [LHsExpr (GhcPass id)] -> LHsExpr (GhcPass id) Source #

mkHsSyntaxApps :: SrcSpanAnnA -> SyntaxExprTc -> [LHsExpr GhcTc] -> LHsExpr GhcTc Source #

mkHsAppType :: LHsExpr GhcRn -> LHsWcType GhcRn -> LHsExpr GhcRn Source #

mkHsAppTypes :: LHsExpr GhcRn -> [LHsWcType GhcRn] -> LHsExpr GhcRn Source #

mkHsCaseAlt :: forall (p :: Pass) body. (Anno (GRHS (GhcPass p) (LocatedA (body (GhcPass p)))) ~ EpAnn NoEpAnns, Anno (Match (GhcPass p) (LocatedA (body (GhcPass p)))) ~ SrcSpanAnnA) => LPat (GhcPass p) -> LocatedA (body (GhcPass p)) -> LMatch (GhcPass p) (LocatedA (body (GhcPass p))) Source #

A simple case alternative with a single pattern, no binds, no guards; pre-typechecking

mkSimpleMatch :: forall (p :: Pass) body. (Anno (Match (GhcPass p) (LocatedA (body (GhcPass p)))) ~ SrcSpanAnnA, Anno (GRHS (GhcPass p) (LocatedA (body (GhcPass p)))) ~ EpAnn NoEpAnns) => HsMatchContext (LIdP (NoGhcTc (GhcPass p))) -> LocatedE [LPat (GhcPass p)] -> LocatedA (body (GhcPass p)) -> LMatch (GhcPass p) (LocatedA (body (GhcPass p))) Source #

unguardedGRHSs :: forall (p :: Pass) body. Anno (GRHS (GhcPass p) (LocatedA (body (GhcPass p)))) ~ EpAnn NoEpAnns => SrcSpan -> LocatedA (body (GhcPass p)) -> EpAnn GrhsAnn -> GRHSs (GhcPass p) (LocatedA (body (GhcPass p))) Source #

unguardedRHS :: forall (p :: Pass) body. Anno (GRHS (GhcPass p) (LocatedA (body (GhcPass p)))) ~ EpAnn NoEpAnns => EpAnn GrhsAnn -> SrcSpan -> LocatedA (body (GhcPass p)) -> [LGRHS (GhcPass p) (LocatedA (body (GhcPass p)))] Source #

mkMatchGroup :: forall (p :: Pass) body. AnnoBody p body => Origin -> LocatedLW [LocatedA (Match (GhcPass p) (LocatedA (body (GhcPass p))))] -> MatchGroup (GhcPass p) (LocatedA (body (GhcPass p))) Source #

mkLamCaseMatchGroup :: forall (p :: Pass) body. AnnoBody p body => Origin -> HsLamVariant -> LocatedLW [LocatedA (Match (GhcPass p) (LocatedA (body (GhcPass p))))] -> MatchGroup (GhcPass p) (LocatedA (body (GhcPass p))) Source #

mkMatch :: forall (p :: Pass). IsPass p => HsMatchContext (LIdP (NoGhcTc (GhcPass p))) -> LocatedE [LPat (GhcPass p)] -> LHsExpr (GhcPass p) -> HsLocalBinds (GhcPass p) -> LMatch (GhcPass p) (LHsExpr (GhcPass p)) Source #

mkPrefixFunRhs :: fn -> AnnFunRhs -> HsMatchContext fn Source #

Make a prefix, non-strict function HsMatchContext

mkHsLam :: forall (p :: Pass). (IsPass p, XMG (GhcPass p) (LHsExpr (GhcPass p)) ~ Origin) => LocatedE [LPat (GhcPass p)] -> LHsExpr (GhcPass p) -> LHsExpr (GhcPass p) Source #

mkHsIf :: LHsExpr GhcPs -> LHsExpr GhcPs -> LHsExpr GhcPs -> AnnsIf -> HsExpr GhcPs Source #

mkHsWrap :: HsWrapper -> HsExpr GhcTc -> HsExpr GhcTc Source #

mkLHsWrap :: HsWrapper -> LHsExpr GhcTc -> LHsExpr GhcTc Source #

mkHsWrapCo :: TcCoercionN -> HsExpr GhcTc -> HsExpr GhcTc Source #

mkHsWrapCoR :: TcCoercionR -> HsExpr GhcTc -> HsExpr GhcTc Source #

mkLHsWrapCo :: TcCoercionN -> LHsExpr GhcTc -> LHsExpr GhcTc Source #

mkHsDictLet :: TcEvBinds -> LHsExpr GhcTc -> LHsExpr GhcTc Source #

mkHsLams :: [TyVar] -> [EvVar] -> LHsExpr GhcTc -> LHsExpr GhcTc Source #

mkHsOpApp :: LHsExpr GhcPs -> IdP GhcPs -> LHsExpr GhcPs -> HsExpr GhcPs Source #

A useful function for building OpApps. The operator is always a variable, and we don't know the fixity yet.

mkHsDo :: HsDoFlavour -> LocatedLW [ExprLStmt GhcPs] -> HsExpr GhcPs Source #

mkHsDoAnns :: HsDoFlavour -> LocatedLW [ExprLStmt GhcPs] -> AnnList EpaLocation -> HsExpr GhcPs Source #

mkHsComp :: HsDoFlavour -> [ExprLStmt GhcPs] -> LHsExpr GhcPs -> HsExpr GhcPs Source #

mkHsCompAnns :: HsDoFlavour -> [ExprLStmt GhcPs] -> LHsExpr GhcPs -> AnnList EpaLocation -> HsExpr GhcPs Source #

mkHsWrapPat :: HsWrapper -> Pat GhcTc -> Type -> Pat GhcTc Source #

mkLHsWrapPat :: HsWrapper -> LPat GhcTc -> Type -> LPat GhcTc Source #

mkHsWrapPatCo :: TcCoercionN -> Pat GhcTc -> Type -> Pat GhcTc Source #

mkLHsPar :: forall (id :: Pass). IsPass id => LHsExpr (GhcPass id) -> LHsExpr (GhcPass id) Source #

Wrap in parens if hsExprNeedsParens appPrec says it needs them So f x becomes (f x), but 3 stays as 3.

mkHsCmdWrap :: HsWrapper -> HsCmd GhcTc -> HsCmd GhcTc Source #

mkLHsCmdWrap :: HsWrapper -> LHsCmd GhcTc -> LHsCmd GhcTc Source #

mkHsCmdIf :: LHsExpr GhcPs -> LHsCmd GhcPs -> LHsCmd GhcPs -> AnnsIf -> HsCmd GhcPs Source #

mkConLikeTc :: ConLike -> HsExpr GhcTc Source #

nlHsTyApp :: Id -> [Type] -> LHsExpr GhcTc Source #

nlHsTyApps :: Id -> [Type] -> [LHsExpr GhcTc] -> LHsExpr GhcTc Source #

nlHsVar :: forall (p :: Pass) a. IsSrcSpanAnn p a => IdP (GhcPass p) -> LHsExpr (GhcPass p) Source #

nlHsDataCon :: DataCon -> LHsExpr GhcTc Source #

NB: Only for LHsExpr Id.

nlHsLit :: forall (p :: Pass). HsLit (GhcPass p) -> LHsExpr (GhcPass p) Source #

nlHsApp :: forall (id :: Pass). IsPass id => LHsExpr (GhcPass id) -> LHsExpr (GhcPass id) -> LHsExpr (GhcPass id) Source #

nlHsApps :: forall (p :: Pass) a. IsSrcSpanAnn p a => IdP (GhcPass p) -> [LHsExpr (GhcPass p)] -> LHsExpr (GhcPass p) Source #

nlHsSyntaxApps :: SyntaxExprTc -> [LHsExpr GhcTc] -> LHsExpr GhcTc Source #

nlHsIntLit :: forall (p :: Pass). Integer -> LHsExpr (GhcPass p) Source #

nlHsVarApps :: forall (p :: Pass) a. IsSrcSpanAnn p a => IdP (GhcPass p) -> [IdP (GhcPass p)] -> LHsExpr (GhcPass p) Source #

nlHsDo :: HsDoFlavour -> [LStmt GhcPs (LHsExpr GhcPs)] -> LHsExpr GhcPs Source #

nlHsOpApp :: LHsExpr GhcPs -> IdP GhcPs -> LHsExpr GhcPs -> LHsExpr GhcPs Source #

nlHsLam :: LMatch GhcPs (LHsExpr GhcPs) -> LHsExpr GhcPs Source #

nlHsPar :: forall (p :: Pass). IsPass p => LHsExpr (GhcPass p) -> LHsExpr (GhcPass p) Source #

nlHsIf :: LHsExpr GhcPs -> LHsExpr GhcPs -> LHsExpr GhcPs -> LHsExpr GhcPs Source #

nlHsCase :: LHsExpr GhcPs -> [LMatch GhcPs (LHsExpr GhcPs)] -> LHsExpr GhcPs Source #

nlList :: [LHsExpr GhcPs] -> LHsExpr GhcPs Source #

mkLHsTupleExpr :: forall (p :: Pass). [LHsExpr (GhcPass p)] -> XExplicitTuple (GhcPass p) -> LHsExpr (GhcPass p) Source #

mkLHsVarTuple :: forall (p :: Pass) a. IsSrcSpanAnn p a => [IdP (GhcPass p)] -> XExplicitTuple (GhcPass p) -> LHsExpr (GhcPass p) Source #

missingTupArg :: EpAnn Bool -> HsTupArg GhcPs Source #

mkLocatedList :: (Semigroup a, NoAnn an) => [GenLocated (EpAnn a) e2] -> LocatedAn an [GenLocated (EpAnn a) e2] Source #

nlAscribe :: RdrName -> LHsExpr GhcPs -> LHsExpr GhcPs Source #

Type ascription: (e :: ty)

Bindings

mkFunBind :: Origin -> LocatedN RdrName -> [LMatch GhcPs (LHsExpr GhcPs)] -> HsBind GhcPs Source #

Not infix, with place holders for coercion and free vars

mkVarBind :: IdP GhcTc -> LHsExpr GhcTc -> LHsBind GhcTc Source #

mkHsVarBind :: SrcSpan -> RdrName -> LHsExpr GhcPs -> LHsBind GhcPs Source #

mkSimpleGeneratedFunBind :: SrcSpan -> RdrName -> LocatedE [LPat GhcPs] -> LHsExpr GhcPs -> LHsBind GhcPs Source #

Convenience function using mkFunBind. This is for generated bindings only, do not use for user-written code.

mkTopFunBind :: Origin -> LocatedN Name -> [LMatch GhcRn (LHsExpr GhcRn)] -> HsBind GhcRn Source #

In Name-land, with empty bind_fvs

mkPatSynBind :: LocatedN RdrName -> HsPatSynDetails GhcPs -> LPat GhcPs -> HsPatSynDir GhcPs -> AnnPSB -> HsBind GhcPs Source #

isInfixFunBind :: forall (p1 :: Pass) (p2 :: Pass). HsBindLR (GhcPass p1) (GhcPass p2) -> Bool Source #

If any of the matches in the FunBind are infix, the FunBind is considered infix.

spanHsLocaLBinds :: forall (p :: Pass). HsLocalBinds (GhcPass p) -> SrcSpan Source #

Return the SrcSpan encompassing the contents of any enclosed binds

Literals

mkHsIntegral :: IntegralLit -> HsOverLit GhcPs Source #

mkHsFractional :: FractionalLit -> HsOverLit GhcPs Source #

mkHsIsString :: SourceText -> FastString -> HsOverLit GhcPs Source #

mkHsString :: forall (p :: Pass). String -> HsLit (GhcPass p) Source #

mkHsStringFS :: forall (p :: Pass). FastString -> HsLit (GhcPass p) Source #

mkHsStringPrimLit :: forall (p :: Pass). FastString -> HsLit (GhcPass p) Source #

mkHsCharPrimLit :: forall (p :: Pass). Char -> HsLit (GhcPass p) Source #

Patterns

mkNPat :: LocatedAn NoEpAnns (HsOverLit GhcPs) -> Maybe (SyntaxExpr GhcPs) -> EpToken "-" -> Pat GhcPs Source #

mkNPlusKPat :: LocatedN RdrName -> LocatedAn NoEpAnns (HsOverLit GhcPs) -> EpToken "+" -> Pat GhcPs Source #

nlVarPat :: forall (p :: Pass) a. IsSrcSpanAnn p a => IdP (GhcPass p) -> LPat (GhcPass p) Source #

nlLitPat :: HsLit GhcPs -> LPat GhcPs Source #

nlConVarPat :: RdrName -> [RdrName] -> LPat GhcPs Source #

nlConVarPatName :: Name -> [Name] -> LPat GhcRn Source #

nlConPat :: RdrName -> [LPat GhcPs] -> LPat GhcPs Source #

nlConPatName :: Name -> [LPat GhcRn] -> LPat GhcRn Source #

nlInfixConPat :: RdrName -> LPat GhcPs -> LPat GhcPs -> LPat GhcPs Source #

nlNullaryConPat :: RdrName -> LPat GhcPs Source #

nlWildConPat :: DataCon -> LPat GhcPs Source #

nlWildPat :: LPat GhcPs Source #

Wildcard pattern - after parsing

nlWildPatName :: LPat GhcRn Source #

Wildcard pattern - after renaming

nlTuplePat :: [LPat GhcPs] -> Boxity -> LPat GhcPs Source #

mkParPat :: forall (p :: Pass). IsPass p => LPat (GhcPass p) -> LPat (GhcPass p) Source #

nlParPat :: forall (p :: Pass). IsPass p => LPat (GhcPass p) -> LPat (GhcPass p) Source #

mkBigLHsVarTup :: forall (p :: Pass) a. IsSrcSpanAnn p a => [IdP (GhcPass p)] -> XExplicitTuple (GhcPass p) -> LHsExpr (GhcPass p) Source #

The Big equivalents for the source tuple expressions

mkBigLHsTup :: forall (id :: Pass). [LHsExpr (GhcPass id)] -> XExplicitTuple (GhcPass id) -> LHsExpr (GhcPass id) Source #

mkBigLHsVarPatTup :: [IdP GhcRn] -> LPat GhcRn Source #

The Big equivalents for the source tuple patterns

mkBigLHsPatTup :: [LPat GhcRn] -> LPat GhcRn Source #

Types

mkHsAppTy :: forall (p :: Pass). LHsType (GhcPass p) -> LHsType (GhcPass p) -> LHsType (GhcPass p) Source #

mkHsAppKindTy :: forall (p :: Pass). XAppKindTy (GhcPass p) -> LHsType (GhcPass p) -> LHsType (GhcPass p) -> LHsType (GhcPass p) Source #

hsTypeToHsSigType :: LHsType GhcPs -> LHsSigType GhcPs Source #

Convert an LHsType to an LHsSigType.

hsTypeToHsSigWcType :: LHsType GhcPs -> LHsSigWcType GhcPs Source #

Convert an LHsType to an LHsSigWcType.

mkClassOpSigs :: [LSig GhcPs] -> [LSig GhcPs] Source #

Convert TypeSig to ClassOpSig. The former is what is parsed, but the latter is what we need in class/instance declarations

mkHsSigEnv :: (LSig GhcRn -> Maybe ([LocatedN Name], a)) -> [LSig GhcRn] -> NameEnv a Source #

nlHsAppTy :: forall (p :: Pass). LHsType (GhcPass p) -> LHsType (GhcPass p) -> LHsType (GhcPass p) Source #

nlHsAppKindTy :: forall (p :: Pass). IsPass p => LHsType (GhcPass p) -> LHsKind (GhcPass p) -> LHsType (GhcPass p) Source #

nlHsTyVar :: forall (p :: Pass) a. IsSrcSpanAnn p a => PromotionFlag -> IdP (GhcPass p) -> LHsType (GhcPass p) Source #

nlHsFunTy :: forall (p :: Pass). IsPass p => LHsType (GhcPass p) -> LHsType (GhcPass p) -> LHsType (GhcPass p) Source #

nlHsParTy :: forall (p :: Pass). LHsType (GhcPass p) -> LHsType (GhcPass p) Source #

nlHsTyConApp :: forall (p :: Pass) a. IsSrcSpanAnn p a => PromotionFlag -> LexicalFixity -> IdP (GhcPass p) -> [LHsTypeArg (GhcPass p)] -> LHsType (GhcPass p) Source #

Stmts

mkTransformStmt :: AnnTransStmt -> [ExprLStmt GhcPs] -> LHsExpr GhcPs -> StmtLR GhcPs GhcPs (LHsExpr GhcPs) Source #

mkTransformByStmt :: AnnTransStmt -> [ExprLStmt GhcPs] -> LHsExpr GhcPs -> LHsExpr GhcPs -> StmtLR GhcPs GhcPs (LHsExpr GhcPs) Source #

mkBodyStmt :: forall bodyR (idL :: Pass). LocatedA (bodyR GhcPs) -> StmtLR (GhcPass idL) GhcPs (LocatedA (bodyR GhcPs)) Source #

mkPsBindStmt :: EpUniToken "<-" "\8592" -> LPat GhcPs -> LocatedA (bodyR GhcPs) -> StmtLR GhcPs GhcPs (LocatedA (bodyR GhcPs)) Source #

mkRnBindStmt :: LPat GhcRn -> LocatedA (bodyR GhcRn) -> StmtLR GhcRn GhcRn (LocatedA (bodyR GhcRn)) Source #

mkTcBindStmt :: LPat GhcTc -> LocatedA (bodyR GhcTc) -> StmtLR GhcTc GhcTc (LocatedA (bodyR GhcTc)) Source #

mkLastStmt :: forall (idR :: Pass) bodyR (idL :: Pass). IsPass idR => LocatedA (bodyR (GhcPass idR)) -> StmtLR (GhcPass idL) (GhcPass idR) (LocatedA (bodyR (GhcPass idR))) Source #

emptyTransStmt :: AnnTransStmt -> StmtLR GhcPs GhcPs (LHsExpr GhcPs) Source #

mkGroupUsingStmt :: AnnTransStmt -> [ExprLStmt GhcPs] -> LHsExpr GhcPs -> StmtLR GhcPs GhcPs (LHsExpr GhcPs) Source #

mkGroupByUsingStmt :: AnnTransStmt -> [ExprLStmt GhcPs] -> LHsExpr GhcPs -> LHsExpr GhcPs -> StmtLR GhcPs GhcPs (LHsExpr GhcPs) Source #

emptyRecStmt :: forall (idL :: Pass) bodyR. Anno [GenLocated (Anno (StmtLR (GhcPass idL) GhcPs bodyR)) (StmtLR (GhcPass idL) GhcPs bodyR)] ~ SrcSpanAnnLW => StmtLR (GhcPass idL) GhcPs bodyR Source #

emptyRecStmtName :: Anno [GenLocated (Anno (StmtLR GhcRn GhcRn bodyR)) (StmtLR GhcRn GhcRn bodyR)] ~ SrcSpanAnnLW => StmtLR GhcRn GhcRn bodyR Source #

emptyRecStmtId :: Stmt GhcTc (LocatedA (HsCmd GhcTc)) Source #

mkRecStmt :: forall (idL :: Pass) bodyR. Anno [GenLocated (Anno (StmtLR (GhcPass idL) GhcPs bodyR)) (StmtLR (GhcPass idL) GhcPs bodyR)] ~ SrcSpanAnnLW => AnnList (EpToken "rec") -> LocatedLW [LStmtLR (GhcPass idL) GhcPs bodyR] -> StmtLR (GhcPass idL) GhcPs bodyR Source #

unitRecStmtTc :: RecStmtTc Source #

mkLetStmt :: EpToken "let" -> HsLocalBinds GhcPs -> StmtLR GhcPs GhcPs (LocatedA b) Source #

Collecting binders

isUnliftedHsBind :: HsBind GhcTc -> Bool Source #

Should we treat this as an unlifted bind? This will be true for any bind that binds an unlifted variable, but we must be careful around AbsBinds. See Note [isUnliftedHsBind]. For usage information, see Note [Strict binds checks] is GHC.HsToCore.Binds.

isUnliftedHsBinds :: LHsBinds GhcTc -> Bool Source #

isBangedHsBind :: HsBind GhcTc -> Bool Source #

Is a binding a strict variable or pattern bind (e.g. !x = ...)?

collectLocalBinders :: forall (idL :: Pass) (idR :: Pass). CollectPass (GhcPass idL) => CollectFlag (GhcPass idL) -> HsLocalBindsLR (GhcPass idL) (GhcPass idR) -> [IdP (GhcPass idL)] Source #

collectHsValBinders :: forall (idL :: Pass) idR. CollectPass (GhcPass idL) => CollectFlag (GhcPass idL) -> HsValBindsLR (GhcPass idL) idR -> [IdP (GhcPass idL)] Source #

collectHsBindListBinders :: CollectPass p => CollectFlag p -> [LHsBindLR p idR] -> [IdP p] Source #

Same as collectHsBindsBinders, but works over a list of bindings

collectHsIdBinders :: forall (idL :: Pass) (idR :: Pass). CollectPass (GhcPass idL) => CollectFlag (GhcPass idL) -> HsValBindsLR (GhcPass idL) (GhcPass idR) -> [IdP (GhcPass idL)] Source #

Collect Id binders only, or Ids + pattern synonyms, respectively

collectHsBindsBinders :: CollectPass p => CollectFlag p -> LHsBindsLR p idR -> [IdP p] Source #

collectHsBindBinders :: CollectPass p => CollectFlag p -> HsBindLR p idR -> [IdP p] Source #

Collect both Ids and pattern-synonym binders

collectMethodBinders :: UnXRec idL => LHsBindsLR idL idR -> [LIdP idL] Source #

Used exclusively for the bindings of an instance decl which are all FunBinds

collectPatBinders :: CollectPass p => CollectFlag p -> LPat p -> [IdP p] Source #

collectPatsBinders :: CollectPass p => CollectFlag p -> [LPat p] -> [IdP p] Source #

collectLStmtsBinders :: forall (idL :: Pass) (idR :: Pass) body. (IsPass idL, IsPass idR, CollectPass (GhcPass idL)) => CollectFlag (GhcPass idL) -> [LStmtLR (GhcPass idL) (GhcPass idR) body] -> [IdP (GhcPass idL)] Source #

collectStmtsBinders :: forall (idL :: Pass) (idR :: Pass) body. (IsPass idL, IsPass idR, CollectPass (GhcPass idL)) => CollectFlag (GhcPass idL) -> [StmtLR (GhcPass idL) (GhcPass idR) body] -> [IdP (GhcPass idL)] Source #

collectLStmtBinders :: forall (idL :: Pass) (idR :: Pass) body. (IsPass idL, IsPass idR, CollectPass (GhcPass idL)) => CollectFlag (GhcPass idL) -> LStmtLR (GhcPass idL) (GhcPass idR) body -> [IdP (GhcPass idL)] Source #

collectStmtBinders :: forall (idL :: Pass) (idR :: Pass) body. (IsPass idL, IsPass idR, CollectPass (GhcPass idL)) => CollectFlag (GhcPass idL) -> StmtLR (GhcPass idL) (GhcPass idR) body -> [IdP (GhcPass idL)] Source #

class UnXRec p => CollectPass p where Source #

This class specifies how to collect variable identifiers from extension patterns in the given pass. Consumers of the GHC API that define their own passes should feel free to implement instances in order to make use of functions which depend on it.

In particular, Haddock already makes use of this, with an instance for its DocNameI pass so that it can reuse the code in GHC for collecting binders.

Methods

collectXXPat :: CollectFlag p -> XXPat p -> [IdP p] -> [IdP p] Source #

collectXXHsBindsLR :: XXHsBindsLR p pR -> [IdP p] -> [IdP p] Source #

collectXSplicePat :: CollectFlag p -> XSplicePat p -> [IdP p] -> [IdP p] Source #

Instances

Instances details
IsPass p => CollectPass (GhcPass p) Source # 
Instance details

Defined in GHC.Hs.Utils

Methods

collectXXPat :: CollectFlag (GhcPass p) -> XXPat (GhcPass p) -> [IdP (GhcPass p)] -> [IdP (GhcPass p)] Source #

collectXXHsBindsLR :: XXHsBindsLR (GhcPass p) pR -> [IdP (GhcPass p)] -> [IdP (GhcPass p)] Source #

collectXSplicePat :: CollectFlag (GhcPass p) -> XSplicePat (GhcPass p) -> [IdP (GhcPass p)] -> [IdP (GhcPass p)] Source #

data CollectFlag p where Source #

Indicate if evidence binders and type variable binders have to be collected.

This type enumerates the modes of collecting bound variables | evidence | type | term | ghc | | binders | variables | variables | pass | -------------------------------------------- CollNoDictBinders | no | no | yes | any | CollWithDictBinders | yes | no | yes | GhcTc | CollVarTyVarBinders | no | yes | yes | GhcRn |

See Note [Dictionary binders in ConPatOut]

Constructors

CollNoDictBinders :: forall p. CollectFlag p

Don't collect evidence binders

CollWithDictBinders :: CollectFlag (GhcPass 'Typechecked)

Collect evidence binders

CollVarTyVarBinders :: CollectFlag (GhcPass 'Renamed)

Collect variable and type variable binders, but no evidence binders

data TyDeclBinders (p :: Pass) Source #

Constructors

TyDeclBinders 

Fields

data LConsWithFields (p :: Pass) Source #

A mapping from constructors to all of their fields.

See Note [Collecting record fields in data declarations].

Constructors

LConsWithFields 

Fields

hsLTyClDeclBinders :: forall (p :: Pass). (IsPass p, OutputableBndrId p) => LocatedA (TyClDecl (GhcPass p)) -> TyDeclBinders p Source #

Returns all the binding names of the decl. The first one is guaranteed to be the name of the decl. The first component represents all binding names except record fields; the second represents field occurrences. For record fields mentioned in multiple constructors, the SrcLoc will be from the first occurrence.

Each returned (Located name) has a SrcSpan for the whole declaration. See Note [SrcSpan for binders]

hsTyClForeignBinders :: [TyClGroup GhcRn] -> [LForeignDecl GhcRn] -> [Name] Source #

hsPatSynSelectors :: forall (p :: Pass). IsPass p => HsValBinds (GhcPass p) -> [FieldOcc (GhcPass p)] Source #

Collects record pattern-synonym selectors only; the pattern synonym names are collected by collectHsValBinders.

getPatSynBinds :: UnXRec id => [(RecFlag, LHsBinds id)] -> [PatSynBind id id] Source #

hsForeignDeclsBinders :: forall (p :: Pass) a. (UnXRec (GhcPass p), IsSrcSpanAnn p a) => [LForeignDecl (GhcPass p)] -> [LIdP (GhcPass p)] Source #

See Note [SrcSpan for binders]

hsGroupBinders :: HsGroup GhcRn -> [Name] Source #

hsDataFamInstBinders :: forall (p :: Pass). (IsPass p, OutputableBndrId p) => DataFamInstDecl (GhcPass p) -> LConsWithFields p Source #

the SrcLoc returned are for the whole declarations, not just the names

Collecting implicit binders

data ImplicitFieldBinders Source #

All binders corresponding to a single implicit record field pattern.

See Note [Collecting implicit binders].

Constructors

ImplicitFieldBinders 

Fields

lStmtsImplicits :: forall (idR :: Pass) (body :: Type -> Type). IsPass idR => [LStmtLR GhcRn (GhcPass idR) (LocatedA (body (GhcPass idR)))] -> [(SrcSpan, [ImplicitFieldBinders])] Source #

hsValBindsImplicits :: forall (idR :: Pass). HsValBindsLR GhcRn (GhcPass idR) -> [(SrcSpan, [ImplicitFieldBinders])] Source #

lPatImplicits :: LPat GhcRn -> [(SrcSpan, [ImplicitFieldBinders])] Source #

Collect all record wild card binders in the given pattern.

These are all the variables bound in all (possibly nested) record wildcard patterns appearing inside the pattern.

See Note [Collecting implicit binders].

lHsRecFieldsImplicits :: [LHsRecField GhcRn (LPat GhcRn)] -> RecFieldsDotDot -> [ImplicitFieldBinders] Source #