\begin{code}
module IfaceSyn (
- module IfaceType, -- Re-export all this
+ module IfaceType,
- IfaceDecl(..), IfaceClassOp(..), IfaceConDecl(..), IfaceConDecls(..),
- IfaceExpr(..), IfaceAlt, IfaceNote(..), IfaceLetBndr(..),
- IfaceBinding(..), IfaceConAlt(..), IfaceIdInfo(..),
- IfaceInfoItem(..), IfaceRule(..), IfaceInst(..), IfaceFamInst(..),
+ IfaceDecl(..), IfaceClassOp(..), IfaceConDecl(..), IfaceConDecls(..),
+ IfaceExpr(..), IfaceAlt, IfaceNote(..), IfaceLetBndr(..),
+ IfaceBinding(..), IfaceConAlt(..),
+ IfaceIdInfo(..), IfaceIdDetails(..), IfaceUnfolding(..),
+ IfaceInfoItem(..), IfaceRule(..), IfaceAnnotation(..), IfaceAnnTarget,
+ IfaceInst(..), IfaceFamInst(..),
- -- Misc
+ -- Misc
ifaceDeclSubBndrs, visibleIfConDecls,
-- Free Names
freeNamesIfDecl, freeNamesIfRule,
- -- Pretty printing
- pprIfaceExpr, pprIfaceDeclHead
+ -- Pretty printing
+ pprIfaceExpr, pprIfaceDeclHead
) where
#include "HsVersions.h"
-import CoreSyn
import IfaceType
-
-import NewDemand
+import CoreSyn( DFunArg, dfunArgExprs )
+import PprCore() -- Printing DFunArgs
+import Demand
+import Annotations
import Class
-import NameSet
+import NameSet
import Name
import CostCentre
import Literal
import ForeignCall
+import Serialized
import BasicTypes
import Outputable
import FastString
import Module
-import Data.List
-import Data.Maybe
-
infixl 3 &&&
\end{code}
%************************************************************************
-%* *
- Data type declarations
-%* *
+%* *
+ Data type declarations
+%* *
%************************************************************************
\begin{code}
-data IfaceDecl
- = IfaceId { ifName :: OccName,
- ifType :: IfaceType,
- ifIdInfo :: IfaceIdInfo }
-
- | IfaceData { ifName :: OccName, -- Type constructor
- ifTyVars :: [IfaceTvBndr], -- Type variables
- ifCtxt :: IfaceContext, -- The "stupid theta"
- ifCons :: IfaceConDecls, -- Includes new/data info
- ifRec :: RecFlag, -- Recursive or not?
- ifGadtSyntax :: Bool, -- True <=> declared using
- -- GADT syntax
- ifGeneric :: Bool, -- True <=> generic converter
- -- functions available
- -- We need this for imported
- -- data decls, since the
- -- imported modules may have
- -- been compiled with
- -- different flags to the
- -- current compilation unit
+data IfaceDecl
+ = IfaceId { ifName :: OccName,
+ ifType :: IfaceType,
+ ifIdDetails :: IfaceIdDetails,
+ ifIdInfo :: IfaceIdInfo }
+
+ | IfaceData { ifName :: OccName, -- Type constructor
+ ifTyVars :: [IfaceTvBndr], -- Type variables
+ ifCtxt :: IfaceContext, -- The "stupid theta"
+ ifCons :: IfaceConDecls, -- Includes new/data info
+ ifRec :: RecFlag, -- Recursive or not?
+ ifGadtSyntax :: Bool, -- True <=> declared using
+ -- GADT syntax
ifFamInst :: Maybe (IfaceTyCon, [IfaceType])
-- Just <=> instance of family
- -- Invariant:
+ -- Invariant:
-- ifCons /= IfOpenDataTyCon
-- for family instances
}
- | IfaceSyn { ifName :: OccName, -- Type constructor
- ifTyVars :: [IfaceTvBndr], -- Type variables
- ifOpenSyn :: Bool, -- Is an open family?
- ifSynRhs :: IfaceType, -- Type for an ordinary
- -- synonym and kind for an
- -- open family
- ifFamInst :: Maybe (IfaceTyCon, [IfaceType])
+ | IfaceSyn { ifName :: OccName, -- Type constructor
+ ifTyVars :: [IfaceTvBndr], -- Type variables
+ ifSynKind :: IfaceKind, -- Kind of the *rhs* (not of the tycon)
+ ifSynRhs :: Maybe IfaceType, -- Just rhs for an ordinary synonyn
+ -- Nothing for an open family
+ ifFamInst :: Maybe (IfaceTyCon, [IfaceType])
-- Just <=> instance of family
-- Invariant: ifOpenSyn == False
-- for family instances
}
- | IfaceClass { ifCtxt :: IfaceContext, -- Context...
- ifName :: OccName, -- Name of the class
- ifTyVars :: [IfaceTvBndr], -- Type variables
- ifFDs :: [FunDep FastString], -- Functional dependencies
- ifATs :: [IfaceDecl], -- Associated type families
- ifSigs :: [IfaceClassOp], -- Method signatures
- ifRec :: RecFlag -- Is newtype/datatype associated with the class recursive?
+ | IfaceClass { ifCtxt :: IfaceContext, -- Context...
+ ifName :: OccName, -- Name of the class
+ ifTyVars :: [IfaceTvBndr], -- Type variables
+ ifFDs :: [FunDep FastString], -- Functional dependencies
+ ifATs :: [IfaceDecl], -- Associated type families
+ ifSigs :: [IfaceClassOp], -- Method signatures
+ ifRec :: RecFlag -- Is newtype/datatype associated
+ -- with the class recursive?
}
| IfaceForeign { ifName :: OccName, -- Needs expanding when we move
-- beyond .NET
- ifExtName :: Maybe FastString }
+ ifExtName :: Maybe FastString }
-data IfaceClassOp = IfaceClassOp OccName DefMeth IfaceType
- -- Nothing => no default method
- -- Just False => ordinary polymorphic default method
- -- Just True => generic default method
+data IfaceClassOp = IfaceClassOp OccName DefMethSpec IfaceType
+ -- Nothing => no default method
+ -- Just False => ordinary polymorphic default method
+ -- Just True => generic default method
data IfaceConDecls
- = IfAbstractTyCon -- No info
- | IfOpenDataTyCon -- Open data family
- | IfDataTyCon [IfaceConDecl] -- data type decls
- | IfNewTyCon IfaceConDecl -- newtype decls
+ = IfAbstractTyCon -- No info
+ | IfOpenDataTyCon -- Open data family
+ | IfDataTyCon [IfaceConDecl] -- data type decls
+ | IfNewTyCon IfaceConDecl -- newtype decls
visibleIfConDecls :: IfaceConDecls -> [IfaceConDecl]
visibleIfConDecls IfAbstractTyCon = []
visibleIfConDecls (IfDataTyCon cs) = cs
visibleIfConDecls (IfNewTyCon c) = [c]
-data IfaceConDecl
+data IfaceConDecl
= IfCon {
- ifConOcc :: OccName, -- Constructor name
- ifConInfix :: Bool, -- True <=> declared infix
- ifConUnivTvs :: [IfaceTvBndr], -- Universal tyvars
- ifConExTvs :: [IfaceTvBndr], -- Existential tyvars
- ifConEqSpec :: [(OccName,IfaceType)], -- Equality contraints
- ifConCtxt :: IfaceContext, -- Non-stupid context
- ifConArgTys :: [IfaceType], -- Arg types
- ifConFields :: [OccName], -- ...ditto... (field labels)
- ifConStricts :: [StrictnessMark]} -- Empty (meaning all lazy),
- -- or 1-1 corresp with arg tys
-
-data IfaceInst
- = IfaceInst { ifInstCls :: Name, -- See comments with
- ifInstTys :: [Maybe IfaceTyCon], -- the defn of Instance
- ifDFun :: Name, -- The dfun
- ifOFlag :: OverlapFlag, -- Overlap flag
- ifInstOrph :: Maybe OccName } -- See Note [Orphans]
- -- There's always a separate IfaceDecl for the DFun, which gives
- -- its IdInfo with its full type and version number.
- -- The instance declarations taken together have a version number,
- -- and we don't want that to wobble gratuitously
- -- If this instance decl is *used*, we'll record a usage on the dfun;
- -- and if the head does not change it won't be used if it wasn't before
+ ifConOcc :: OccName, -- Constructor name
+ ifConWrapper :: Bool, -- True <=> has a wrapper
+ ifConInfix :: Bool, -- True <=> declared infix
+ ifConUnivTvs :: [IfaceTvBndr], -- Universal tyvars
+ ifConExTvs :: [IfaceTvBndr], -- Existential tyvars
+ ifConEqSpec :: [(OccName,IfaceType)], -- Equality contraints
+ ifConCtxt :: IfaceContext, -- Non-stupid context
+ ifConArgTys :: [IfaceType], -- Arg types
+ ifConFields :: [OccName], -- ...ditto... (field labels)
+ ifConStricts :: [HsBang]} -- Empty (meaning all lazy),
+ -- or 1-1 corresp with arg tys
+
+data IfaceInst
+ = IfaceInst { ifInstCls :: IfExtName, -- See comments with
+ ifInstTys :: [Maybe IfaceTyCon], -- the defn of Instance
+ ifDFun :: IfExtName, -- The dfun
+ ifOFlag :: OverlapFlag, -- Overlap flag
+ ifInstOrph :: Maybe OccName } -- See Note [Orphans]
+ -- There's always a separate IfaceDecl for the DFun, which gives
+ -- its IdInfo with its full type and version number.
+ -- The instance declarations taken together have a version number,
+ -- and we don't want that to wobble gratuitously
+ -- If this instance decl is *used*, we'll record a usage on the dfun;
+ -- and if the head does not change it won't be used if it wasn't before
data IfaceFamInst
- = IfaceFamInst { ifFamInstFam :: Name -- Family tycon
- , ifFamInstTys :: [Maybe IfaceTyCon] -- Rough match types
- , ifFamInstTyCon :: IfaceTyCon -- Instance decl
- }
+ = IfaceFamInst { ifFamInstFam :: IfExtName -- Family tycon
+ , ifFamInstTys :: [Maybe IfaceTyCon] -- Rough match types
+ , ifFamInstTyCon :: IfaceTyCon -- Instance decl
+ }
data IfaceRule
- = IfaceRule {
- ifRuleName :: RuleName,
- ifActivation :: Activation,
- ifRuleBndrs :: [IfaceBndr], -- Tyvars and term vars
- ifRuleHead :: Name, -- Head of lhs
- ifRuleArgs :: [IfaceExpr], -- Args of LHS
- ifRuleRhs :: IfaceExpr,
- ifRuleOrph :: Maybe OccName -- Just like IfaceInst
+ = IfaceRule {
+ ifRuleName :: RuleName,
+ ifActivation :: Activation,
+ ifRuleBndrs :: [IfaceBndr], -- Tyvars and term vars
+ ifRuleHead :: IfExtName, -- Head of lhs
+ ifRuleArgs :: [IfaceExpr], -- Args of LHS
+ ifRuleRhs :: IfaceExpr,
+ ifRuleAuto :: Bool,
+ ifRuleOrph :: Maybe OccName -- Just like IfaceInst
}
+data IfaceAnnotation
+ = IfaceAnnotation {
+ ifAnnotatedTarget :: IfaceAnnTarget,
+ ifAnnotatedValue :: Serialized
+ }
+
+type IfaceAnnTarget = AnnTarget OccName
+
+-- We only serialise the IdDetails of top-level Ids, and even then
+-- we only need a very limited selection. Notably, none of the
+-- implicit ones are needed here, becuase they are not put it
+-- interface files
+
+data IfaceIdDetails
+ = IfVanillaId
+ | IfRecSelId IfaceTyCon Bool
+ | IfDFunId Int -- Number of silent args
+
data IfaceIdInfo
- = NoInfo -- When writing interface file without -O
- | HasInfo [IfaceInfoItem] -- Has info, and here it is
+ = NoInfo -- When writing interface file without -O
+ | HasInfo [IfaceInfoItem] -- Has info, and here it is
-- Here's a tricky case:
-- * Compile with -O module A, and B which imports A.f
-- * Change function f in A, and recompile without -O
-- * When we read in old A.hi we read in its IdInfo (as a thunk)
--- (In earlier GHCs we used to drop IdInfo immediately on reading,
--- but we do not do that now. Instead it's discarded when the
--- ModIface is read into the various decl pools.)
+-- (In earlier GHCs we used to drop IdInfo immediately on reading,
+-- but we do not do that now. Instead it's discarded when the
+-- ModIface is read into the various decl pools.)
-- * The version comparsion sees that new (=NoInfo) differs from old (=HasInfo *)
--- and so gives a new version.
+-- and so gives a new version.
data IfaceInfoItem
- = HsArity Arity
+ = HsArity Arity
| HsStrictness StrictSig
- | HsInline Activation
- | HsUnfold IfaceExpr
+ | HsInline InlinePragma
+ | HsUnfold Bool -- True <=> isNonRuleLoopBreaker is true
+ IfaceUnfolding -- See Note [Expose recursive functions]
| HsNoCafRefs
- | HsWorker Name Arity -- Worker, if any see IdInfo.WorkerInfo
- -- for why we want arity here.
- -- NB: we need IfaceExtName (not just OccName) because the worker
- -- can simplify to a function in another module.
+
-- NB: Specialisations and rules come in separately and are
-- only later attached to the Id. Partial reason: some are orphans.
+data IfaceUnfolding
+ = IfCoreUnfold Bool IfaceExpr -- True <=> INLINABLE, False <=> regular unfolding
+ -- Possibly could eliminate the Bool here, the information
+ -- is also in the InlinePragma.
+
+ | IfCompulsory IfaceExpr -- Only used for default methods, in fact
+
+ | IfInlineRule Arity -- INLINE pragmas
+ Bool -- OK to inline even if *un*-saturated
+ Bool -- OK to inline even if context is boring
+ IfaceExpr
+
+ | IfExtWrapper Arity IfExtName -- NB: sometimes we need a IfExtName (not just IfLclName)
+ | IfLclWrapper Arity IfLclName -- because the worker can simplify to a function in
+ -- another module.
+
+ | IfDFunUnfold [DFunArg IfaceExpr]
+
--------------------------------
data IfaceExpr
- = IfaceLcl FastString
- | IfaceExt Name
+ = IfaceLcl IfLclName
+ | IfaceExt IfExtName
| IfaceType IfaceType
- | IfaceTuple Boxity [IfaceExpr] -- Saturated; type arguments omitted
+ | IfaceCo IfaceType -- We re-use IfaceType for coercions
+ | IfaceTuple Boxity [IfaceExpr] -- Saturated; type arguments omitted
| IfaceLam IfaceBndr IfaceExpr
| IfaceApp IfaceExpr IfaceExpr
- | IfaceCase IfaceExpr FastString IfaceType [IfaceAlt]
+ | IfaceCase IfaceExpr IfLclName [IfaceAlt]
| IfaceLet IfaceBinding IfaceExpr
| IfaceNote IfaceNote IfaceExpr
| IfaceCast IfaceExpr IfaceCoercion
- | IfaceLit Literal
- | IfaceFCall ForeignCall IfaceType
+ | IfaceLit Literal
+ | IfaceFCall ForeignCall IfaceType
| IfaceTick Module Int
data IfaceNote = IfaceSCC CostCentre
- | IfaceInlineMe
| IfaceCoreNote String
-type IfaceAlt = (IfaceConAlt, [FastString], IfaceExpr)
- -- Note: FastString, not IfaceBndr (and same with the case binder)
- -- We reconstruct the kind/type of the thing from the context
- -- thus saving bulk in interface files
+type IfaceAlt = (IfaceConAlt, [IfLclName], IfaceExpr)
+ -- Note: IfLclName, not IfaceBndr (and same with the case binder)
+ -- We reconstruct the kind/type of the thing from the context
+ -- thus saving bulk in interface files
data IfaceConAlt = IfaceDefault
- | IfaceDataAlt Name
- | IfaceTupleAlt Boxity
- | IfaceLitAlt Literal
+ | IfaceDataAlt IfExtName
+ | IfaceTupleAlt Boxity
+ | IfaceLitAlt Literal
data IfaceBinding
- = IfaceNonRec IfaceLetBndr IfaceExpr
- | IfaceRec [(IfaceLetBndr, IfaceExpr)]
+ = IfaceNonRec IfaceLetBndr IfaceExpr
+ | IfaceRec [(IfaceLetBndr, IfaceExpr)]
-- IfaceLetBndr is like IfaceIdBndr, but has IdInfo too
-- It's used for *non-top-level* let/rec binders
-- See Note [IdInfo on nested let-bindings]
-data IfaceLetBndr = IfLetBndr FastString IfaceType IfaceIdInfo
+data IfaceLetBndr = IfLetBndr IfLclName IfaceType IfaceIdInfo
\end{code}
+Note [Expose recursive functions]
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+For supercompilation we want to put *all* unfoldings in the interface
+file, even for functions that are recursive (or big). So we need to
+know when an unfolding belongs to a loop-breaker so that we can refrain
+from inlining it (except during supercompilation).
+
Note [IdInfo on nested let-bindings]
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Occasionally we want to preserve IdInfo on nested let bindings. The one
function. The user (Duncan Coutts) really wanted the NOINLINE control
to cross the separate compilation boundary.
-So a IfaceLetBndr keeps a trimmed-down list of IfaceIdInfo stuff.
-Currently we only actually retain InlinePragInfo, but in principle we could
-add strictness etc.
-
+In general we retain all info that is left by CoreTidy.tidyLetBndr, since
+that is what is seen by importing module with --make
Note [Orphans]: the ifInstOrph and ifRuleOrph fields
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
and suppose we are compiling module X:
module X where
- import M
- data T = ...
- instance C Int T where ...
+ import M
+ data T = ...
+ instance C Int T where ...
This instance is an orphan, because when compiling a third module Y we
might get a constraint (C Int v), and we'd want to improve v to T. So
If there are fundeps, then for every fundep, at least one of the
names free in a *non-determined* part of the instance head is
- defined in this module.
+ defined in this module.
(Note that these conditions hold trivially if the class is locally
defined.)
and suppose we are compiling module X:
module X where
- import M
- data S = ...
- data T = ...
- instance C S T where ...
+ import M
+ data S = ...
+ data T = ...
+ instance C S T where ...
If we base the instance verion on T, I'm worried that changing S to S'
would change T's version, but not S or S'. But an importing module might
Note [Versioning of rules]
~~~~~~~~~~~~~~~~~~~~~~~~~~
-A rule that is not an orphan has an ifRuleOrph field of (Just n), where
-n appears on the LHS of the rule; any change in the rule changes the version of n.
+A rule that is not an orphan has an ifRuleOrph field of (Just n), where n
+appears on the LHS of the rule; any change in the rule changes the version of n.
\begin{code}
-- Newtype
ifaceDeclSubBndrs (IfaceData {ifName = tc_occ,
ifCons = IfNewTyCon (
- IfCon { ifConOcc = con_occ,
- ifConFields = fields
- }),
- ifFamInst = famInst})
- = -- fields (names of selectors)
- fields ++
- -- implicit coerion and (possibly) family instance coercion
+ IfCon { ifConOcc = con_occ }),
+ ifFamInst = famInst})
+ = -- implicit coerion and (possibly) family instance coercion
(mkNewTyCoOcc tc_occ) : (famInstCo famInst tc_occ) ++
- -- data constructor and worker (newtypes don't have a wrapper)
+ -- data constructor and worker (newtypes don't have a wrapper)
[con_occ, mkDataConWorkerOcc con_occ]
ifaceDeclSubBndrs (IfaceData {ifName = tc_occ,
- ifCons = IfDataTyCon cons,
- ifFamInst = famInst})
- = -- fields (names of selectors)
- nub (concatMap ifConFields cons) -- Eliminate duplicate fields
- -- (possibly) family instance coercion;
- -- there is no implicit coercion for non-newtypes
- ++ famInstCo famInst tc_occ
- -- for each data constructor in order,
- -- data constructor, worker, and (possibly) wrapper
+ ifCons = IfDataTyCon cons,
+ ifFamInst = famInst})
+ = -- (possibly) family instance coercion;
+ -- there is no implicit coercion for non-newtypes
+ famInstCo famInst tc_occ
+ -- for each data constructor in order,
+ -- data constructor, worker, and (possibly) wrapper
++ concatMap dc_occs cons
where
dc_occs con_decl
- | has_wrapper = [con_occ, work_occ, wrap_occ]
- | otherwise = [con_occ, work_occ]
- where
- con_occ = ifConOcc con_decl -- DataCon namespace
- wrap_occ = mkDataConWrapperOcc con_occ -- Id namespace
- work_occ = mkDataConWorkerOcc con_occ -- Id namespace
- strs = ifConStricts con_decl
- has_wrapper = any isMarkedStrict strs -- See MkId.mkDataConIds (sigh)
- || not (null . ifConEqSpec $ con_decl)
- || isJust famInst
- -- ToDo: may miss strictness in existential dicts
-
-ifaceDeclSubBndrs (IfaceClass {ifCtxt = sc_ctxt, ifName = cls_occ,
- ifSigs = sigs, ifATs = ats })
+ | has_wrapper = [con_occ, work_occ, wrap_occ]
+ | otherwise = [con_occ, work_occ]
+ where
+ con_occ = ifConOcc con_decl -- DataCon namespace
+ wrap_occ = mkDataConWrapperOcc con_occ -- Id namespace
+ work_occ = mkDataConWorkerOcc con_occ -- Id namespace
+ has_wrapper = ifConWrapper con_decl -- This is the reason for
+ -- having the ifConWrapper field!
+
+ifaceDeclSubBndrs (IfaceClass {ifCtxt = sc_ctxt, ifName = cls_occ,
+ ifSigs = sigs, ifATs = ats })
= -- dictionary datatype:
-- type constructor
- tc_occ :
+ tc_occ :
-- (possibly) newtype coercion
co_occs ++
-- data constructor (DataCon namespace)
n_ctxt = length sc_ctxt
n_sigs = length sigs
tc_occ = mkClassTyConOcc cls_occ
- dc_occ = mkClassDataConOcc cls_occ
+ dc_occ = mkClassDataConOcc cls_occ
co_occs | is_newtype = [mkNewTyCoOcc tc_occ]
- | otherwise = []
+ | otherwise = []
dcww_occ = mkDataConWorkerOcc dc_occ
- is_newtype = n_sigs + n_ctxt == 1 -- Sigh
+ is_newtype = n_sigs + n_ctxt == 1 -- Sigh
ifaceDeclSubBndrs (IfaceSyn {ifName = tc_occ,
- ifFamInst = famInst})
+ ifFamInst = famInst})
= famInstCo famInst tc_occ
ifaceDeclSubBndrs _ = []
ppr = pprIfaceDecl
pprIfaceDecl :: IfaceDecl -> SDoc
-pprIfaceDecl (IfaceId {ifName = var, ifType = ty, ifIdInfo = info})
- = sep [ ppr var <+> dcolon <+> ppr ty,
- nest 2 (ppr info) ]
+pprIfaceDecl (IfaceId {ifName = var, ifType = ty,
+ ifIdDetails = details, ifIdInfo = info})
+ = sep [ ppr var <+> dcolon <+> ppr ty,
+ nest 2 (ppr details),
+ nest 2 (ppr info) ]
pprIfaceDecl (IfaceForeign {ifName = tycon})
= hsep [ptext (sLit "foreign import type dotnet"), ppr tycon]
-pprIfaceDecl (IfaceSyn {ifName = tycon, ifTyVars = tyvars,
- ifOpenSyn = False, ifSynRhs = mono_ty,
+pprIfaceDecl (IfaceSyn {ifName = tycon, ifTyVars = tyvars,
+ ifSynRhs = Just mono_ty,
ifFamInst = mbFamInst})
= hang (ptext (sLit "type") <+> pprIfaceDeclHead [] tycon tyvars)
4 (vcat [equals <+> ppr mono_ty, pprFamily mbFamInst])
-pprIfaceDecl (IfaceSyn {ifName = tycon, ifTyVars = tyvars,
- ifOpenSyn = True, ifSynRhs = mono_ty})
+pprIfaceDecl (IfaceSyn {ifName = tycon, ifTyVars = tyvars,
+ ifSynRhs = Nothing, ifSynKind = kind })
= hang (ptext (sLit "type family") <+> pprIfaceDeclHead [] tycon tyvars)
- 4 (dcolon <+> ppr mono_ty)
+ 4 (dcolon <+> ppr kind)
-pprIfaceDecl (IfaceData {ifName = tycon, ifGeneric = gen, ifCtxt = context,
- ifTyVars = tyvars, ifCons = condecls,
- ifRec = isrec, ifFamInst = mbFamInst})
+pprIfaceDecl (IfaceData {ifName = tycon, ifCtxt = context,
+ ifTyVars = tyvars, ifCons = condecls,
+ ifRec = isrec, ifFamInst = mbFamInst})
= hang (pp_nd <+> pprIfaceDeclHead context tycon tyvars)
- 4 (vcat [pprRec isrec, pprGen gen, pp_condecls tycon condecls,
- pprFamily mbFamInst])
+ 4 (vcat [pprRec isrec, pp_condecls tycon condecls,
+ pprFamily mbFamInst])
where
pp_nd = case condecls of
- IfAbstractTyCon -> ptext (sLit "data")
- IfOpenDataTyCon -> ptext (sLit "data family")
- IfDataTyCon _ -> ptext (sLit "data")
- IfNewTyCon _ -> ptext (sLit "newtype")
-
-pprIfaceDecl (IfaceClass {ifCtxt = context, ifName = clas, ifTyVars = tyvars,
- ifFDs = fds, ifATs = ats, ifSigs = sigs,
- ifRec = isrec})
+ IfAbstractTyCon -> ptext (sLit "data")
+ IfOpenDataTyCon -> ptext (sLit "data family")
+ IfDataTyCon _ -> ptext (sLit "data")
+ IfNewTyCon _ -> ptext (sLit "newtype")
+
+pprIfaceDecl (IfaceClass {ifCtxt = context, ifName = clas, ifTyVars = tyvars,
+ ifFDs = fds, ifATs = ats, ifSigs = sigs,
+ ifRec = isrec})
= hang (ptext (sLit "class") <+> pprIfaceDeclHead context clas tyvars <+> pprFundeps fds)
4 (vcat [pprRec isrec,
- sep (map ppr ats),
- sep (map ppr sigs)])
+ sep (map ppr ats),
+ sep (map ppr sigs)])
pprRec :: RecFlag -> SDoc
pprRec isrec = ptext (sLit "RecFlag") <+> ppr isrec
-pprGen :: Bool -> SDoc
-pprGen True = ptext (sLit "Generics: yes")
-pprGen False = ptext (sLit "Generics: no")
-
pprFamily :: Maybe (IfaceTyCon, [IfaceType]) -> SDoc
pprFamily Nothing = ptext (sLit "FamilyInstance: none")
pprFamily (Just famInst) = ptext (sLit "FamilyInstance:") <+> ppr famInst
pprIfaceDeclHead :: IfaceContext -> OccName -> [IfaceTvBndr] -> SDoc
pprIfaceDeclHead context thing tyvars
- = hsep [pprIfaceContext context, parenSymOcc thing (ppr thing),
- pprIfaceTvBndrs tyvars]
+ = hsep [pprIfaceContext context, parenSymOcc thing (ppr thing),
+ pprIfaceTvBndrs tyvars]
pp_condecls :: OccName -> IfaceConDecls -> SDoc
pp_condecls _ IfAbstractTyCon = ptext (sLit "{- abstract -}")
pp_condecls tc (IfNewTyCon c) = equals <+> pprIfaceConDecl tc c
pp_condecls _ IfOpenDataTyCon = empty
pp_condecls tc (IfDataTyCon cs) = equals <+> sep (punctuate (ptext (sLit " |"))
- (map (pprIfaceConDecl tc) cs))
+ (map (pprIfaceConDecl tc) cs))
pprIfaceConDecl :: OccName -> IfaceConDecl -> SDoc
pprIfaceConDecl tc
- (IfCon { ifConOcc = name, ifConInfix = is_infix,
- ifConUnivTvs = univ_tvs, ifConExTvs = ex_tvs,
- ifConEqSpec = eq_spec, ifConCtxt = ctxt, ifConArgTys = arg_tys,
- ifConStricts = strs, ifConFields = fields })
+ (IfCon { ifConOcc = name, ifConInfix = is_infix, ifConWrapper = has_wrap,
+ ifConUnivTvs = univ_tvs, ifConExTvs = ex_tvs,
+ ifConEqSpec = eq_spec, ifConCtxt = ctxt, ifConArgTys = arg_tys,
+ ifConStricts = strs, ifConFields = fields })
= sep [main_payload,
- if is_infix then ptext (sLit "Infix") else empty,
- if null strs then empty
- else nest 4 (ptext (sLit "Stricts:") <+> hsep (map ppr strs)),
- if null fields then empty
- else nest 4 (ptext (sLit "Fields:") <+> hsep (map ppr fields))]
+ if is_infix then ptext (sLit "Infix") else empty,
+ if has_wrap then ptext (sLit "HasWrapper") else empty,
+ ppUnless (null strs) $
+ nest 4 (ptext (sLit "Stricts:") <+> hsep (map ppr_bang strs)),
+ ppUnless (null fields) $
+ nest 4 (ptext (sLit "Fields:") <+> hsep (map ppr fields))]
where
- main_payload = ppr name <+> dcolon <+>
- pprIfaceForAllPart (univ_tvs ++ ex_tvs) (eq_ctxt ++ ctxt) pp_tau
+ ppr_bang HsNoBang = char '_' -- Want to see these
+ ppr_bang bang = ppr bang
- eq_ctxt = [(IfaceEqPred (IfaceTyVar (occNameFS tv)) ty)
- | (tv,ty) <- eq_spec]
+ main_payload = ppr name <+> dcolon <+>
+ pprIfaceForAllPart (univ_tvs ++ ex_tvs) (eq_ctxt ++ ctxt) pp_tau
- -- A bit gruesome this, but we can't form the full con_tau, and ppr it,
- -- because we don't have a Name for the tycon, only an OccName
+ eq_ctxt = [(IfaceEqPred (IfaceTyVar (occNameFS tv)) ty)
+ | (tv,ty) <- eq_spec]
+
+ -- A bit gruesome this, but we can't form the full con_tau, and ppr it,
+ -- because we don't have a Name for the tycon, only an OccName
pp_tau = case map pprParendIfaceType arg_tys ++ [pp_res_ty] of
- (t:ts) -> fsep (t : map (arrow <+>) ts)
- [] -> panic "pp_con_taus"
+ (t:ts) -> fsep (t : map (arrow <+>) ts)
+ [] -> panic "pp_con_taus"
pp_res_ty = ppr tc <+> fsep [ppr tv | (tv,_) <- univ_tvs]
instance Outputable IfaceRule where
ppr (IfaceRule { ifRuleName = name, ifActivation = act, ifRuleBndrs = bndrs,
- ifRuleHead = fn, ifRuleArgs = args, ifRuleRhs = rhs })
+ ifRuleHead = fn, ifRuleArgs = args, ifRuleRhs = rhs })
= sep [hsep [doubleQuotes (ftext name), ppr act,
- ptext (sLit "forall") <+> pprIfaceBndrs bndrs],
- nest 2 (sep [ppr fn <+> sep (map (pprIfaceExpr parens) args),
- ptext (sLit "=") <+> ppr rhs])
+ ptext (sLit "forall") <+> pprIfaceBndrs bndrs],
+ nest 2 (sep [ppr fn <+> sep (map pprParendIfaceExpr args),
+ ptext (sLit "=") <+> ppr rhs])
]
instance Outputable IfaceInst where
- ppr (IfaceInst {ifDFun = dfun_id, ifOFlag = flag,
- ifInstCls = cls, ifInstTys = mb_tcs})
- = hang (ptext (sLit "instance") <+> ppr flag
- <+> ppr cls <+> brackets (pprWithCommas ppr_rough mb_tcs))
+ ppr (IfaceInst {ifDFun = dfun_id, ifOFlag = flag,
+ ifInstCls = cls, ifInstTys = mb_tcs})
+ = hang (ptext (sLit "instance") <+> ppr flag
+ <+> ppr cls <+> brackets (pprWithCommas ppr_rough mb_tcs))
2 (equals <+> ppr dfun_id)
instance Outputable IfaceFamInst where
ppr (IfaceFamInst {ifFamInstFam = fam, ifFamInstTys = mb_tcs,
- ifFamInstTyCon = tycon_id})
- = hang (ptext (sLit "family instance") <+>
- ppr fam <+> brackets (pprWithCommas ppr_rough mb_tcs))
+ ifFamInstTyCon = tycon_id})
+ = hang (ptext (sLit "family instance") <+>
+ ppr fam <+> brackets (pprWithCommas ppr_rough mb_tcs))
2 (equals <+> ppr tycon_id)
ppr_rough :: Maybe IfaceTyCon -> SDoc
instance Outputable IfaceExpr where
ppr e = pprIfaceExpr noParens e
+pprParendIfaceExpr :: IfaceExpr -> SDoc
+pprParendIfaceExpr = pprIfaceExpr parens
+
+-- | Pretty Print an IfaceExpre
+--
+-- The first argument should be a function that adds parens in context that need
+-- an atomic value (e.g. function args)
pprIfaceExpr :: (SDoc -> SDoc) -> IfaceExpr -> SDoc
- -- The function adds parens in context that need
- -- an atomic value (e.g. function args)
pprIfaceExpr _ (IfaceLcl v) = ppr v
pprIfaceExpr _ (IfaceExt v) = ppr v
pprIfaceExpr _ (IfaceFCall cc ty) = braces (ppr cc <+> ppr ty)
pprIfaceExpr _ (IfaceTick m ix) = braces (text "tick" <+> ppr m <+> ppr ix)
pprIfaceExpr _ (IfaceType ty) = char '@' <+> pprParendIfaceType ty
+pprIfaceExpr _ (IfaceCo co) = text "@~" <+> pprParendIfaceType co
pprIfaceExpr add_par app@(IfaceApp _ _) = add_par (pprIfaceApp app [])
pprIfaceExpr _ (IfaceTuple c as) = tupleParens c (interpp'SP as)
-pprIfaceExpr add_par e@(IfaceLam _ _)
+pprIfaceExpr add_par i@(IfaceLam _ _)
= add_par (sep [char '\\' <+> sep (map ppr bndrs) <+> arrow,
- pprIfaceExpr noParens body])
- where
- (bndrs,body) = collect [] e
+ pprIfaceExpr noParens body])
+ where
+ (bndrs,body) = collect [] i
collect bs (IfaceLam b e) = collect (b:bs) e
collect bs e = (reverse bs, e)
-pprIfaceExpr add_par (IfaceCase scrut bndr ty [(con, bs, rhs)])
- = add_par (sep [ptext (sLit "case") <+> char '@' <+> pprParendIfaceType ty
+pprIfaceExpr add_par (IfaceCase scrut bndr [(con, bs, rhs)])
+ = add_par (sep [ptext (sLit "case")
<+> pprIfaceExpr noParens scrut <+> ptext (sLit "of")
<+> ppr bndr <+> char '{' <+> ppr_con_bs con bs <+> arrow,
pprIfaceExpr noParens rhs <+> char '}'])
-pprIfaceExpr add_par (IfaceCase scrut bndr ty alts)
- = add_par (sep [ptext (sLit "case") <+> char '@' <+> pprParendIfaceType ty
+pprIfaceExpr add_par (IfaceCase scrut bndr alts)
+ = add_par (sep [ptext (sLit "case")
<+> pprIfaceExpr noParens scrut <+> ptext (sLit "of")
<+> ppr bndr <+> char '{',
nest 2 (sep (map ppr_alt alts)) <+> char '}'])
pprIfaceExpr _ (IfaceCast expr co)
- = sep [pprIfaceExpr parens expr,
- nest 2 (ptext (sLit "`cast`")),
- pprParendIfaceType co]
+ = sep [pprParendIfaceExpr expr,
+ nest 2 (ptext (sLit "`cast`")),
+ pprParendIfaceType co]
pprIfaceExpr add_par (IfaceLet (IfaceNonRec b rhs) body)
- = add_par (sep [ptext (sLit "let {"),
- nest 2 (ppr_bind (b, rhs)),
- ptext (sLit "} in"),
- pprIfaceExpr noParens body])
+ = add_par (sep [ptext (sLit "let {"),
+ nest 2 (ppr_bind (b, rhs)),
+ ptext (sLit "} in"),
+ pprIfaceExpr noParens body])
pprIfaceExpr add_par (IfaceLet (IfaceRec pairs) body)
= add_par (sep [ptext (sLit "letrec {"),
- nest 2 (sep (map ppr_bind pairs)),
- ptext (sLit "} in"),
- pprIfaceExpr noParens body])
+ nest 2 (sep (map ppr_bind pairs)),
+ ptext (sLit "} in"),
+ pprIfaceExpr noParens body])
-pprIfaceExpr add_par (IfaceNote note body) = add_par (ppr note <+> pprIfaceExpr parens body)
+pprIfaceExpr add_par (IfaceNote note body) = add_par $ ppr note
+ <+> pprParendIfaceExpr body
-ppr_alt :: (IfaceConAlt, [FastString], IfaceExpr) -> SDoc
-ppr_alt (con, bs, rhs) = sep [ppr_con_bs con bs,
- arrow <+> pprIfaceExpr noParens rhs]
+ppr_alt :: (IfaceConAlt, [IfLclName], IfaceExpr) -> SDoc
+ppr_alt (con, bs, rhs) = sep [ppr_con_bs con bs,
+ arrow <+> pprIfaceExpr noParens rhs]
-ppr_con_bs :: IfaceConAlt -> [FastString] -> SDoc
+ppr_con_bs :: IfaceConAlt -> [IfLclName] -> SDoc
ppr_con_bs (IfaceTupleAlt tup_con) bs = tupleParens tup_con (interpp'SP bs)
-ppr_con_bs con bs = ppr con <+> hsep (map ppr bs)
-
+ppr_con_bs con bs = ppr con <+> hsep (map ppr bs)
+
ppr_bind :: (IfaceLetBndr, IfaceExpr) -> SDoc
-ppr_bind (IfLetBndr b ty info, rhs)
+ppr_bind (IfLetBndr b ty info, rhs)
= sep [hang (ppr b <+> dcolon <+> ppr ty) 2 (ppr info),
- equals <+> pprIfaceExpr noParens rhs]
+ equals <+> pprIfaceExpr noParens rhs]
------------------
pprIfaceApp :: IfaceExpr -> [SDoc] -> SDoc
-pprIfaceApp (IfaceApp fun arg) args = pprIfaceApp fun (nest 2 (pprIfaceExpr parens arg) : args)
-pprIfaceApp fun args = sep (pprIfaceExpr parens fun : args)
+pprIfaceApp (IfaceApp fun arg) args = pprIfaceApp fun $
+ nest 2 (pprParendIfaceExpr arg) : args
+pprIfaceApp fun args = sep (pprParendIfaceExpr fun : args)
------------------
instance Outputable IfaceNote where
ppr (IfaceSCC cc) = pprCostCentreCore cc
- ppr IfaceInlineMe = ptext (sLit "__inline_me")
- ppr (IfaceCoreNote s) = ptext (sLit "__core_note") <+> pprHsString (mkFastString s)
+ ppr (IfaceCoreNote s) = ptext (sLit "__core_note")
+ <+> pprHsString (mkFastString s)
instance Outputable IfaceConAlt where
ppr IfaceDefault = text "DEFAULT"
ppr (IfaceLitAlt l) = ppr l
ppr (IfaceDataAlt d) = ppr d
- ppr (IfaceTupleAlt _) = panic "ppr IfaceConAlt"
+ ppr (IfaceTupleAlt _) = panic "ppr IfaceConAlt"
-- IfaceTupleAlt is handled by the case-alternative printer
------------------
+instance Outputable IfaceIdDetails where
+ ppr IfVanillaId = empty
+ ppr (IfRecSelId tc b) = ptext (sLit "RecSel") <+> ppr tc
+ <+> if b then ptext (sLit "<naughty>") else empty
+ ppr (IfDFunId ns) = ptext (sLit "DFunId") <> brackets (int ns)
+
instance Outputable IfaceIdInfo where
ppr NoInfo = empty
- ppr (HasInfo is) = ptext (sLit "{-") <+> fsep (map ppr is) <+> ptext (sLit "-}")
+ ppr (HasInfo is) = ptext (sLit "{-") <+> pprWithCommas ppr is
+ <+> ptext (sLit "-}")
instance Outputable IfaceInfoItem where
- ppr (HsUnfold unf) = ptext (sLit "Unfolding:") <+>
- parens (pprIfaceExpr noParens unf)
- ppr (HsInline act) = ptext (sLit "Inline:") <+> ppr act
+ ppr (HsUnfold lb unf) = ptext (sLit "Unfolding")
+ <> ppWhen lb (ptext (sLit "(loop-breaker)"))
+ <> colon <+> ppr unf
+ ppr (HsInline prag) = ptext (sLit "Inline:") <+> ppr prag
ppr (HsArity arity) = ptext (sLit "Arity:") <+> int arity
ppr (HsStrictness str) = ptext (sLit "Strictness:") <+> pprIfaceStrictSig str
- ppr HsNoCafRefs = ptext (sLit "HasNoCafRefs")
- ppr (HsWorker w a) = ptext (sLit "Worker:") <+> ppr w <+> int a
-
+ ppr HsNoCafRefs = ptext (sLit "HasNoCafRefs")
+
+instance Outputable IfaceUnfolding where
+ ppr (IfCompulsory e) = ptext (sLit "<compulsory>") <+> parens (ppr e)
+ ppr (IfCoreUnfold s e) = (if s then ptext (sLit "<stable>") else empty)
+ <+> parens (ppr e)
+ ppr (IfInlineRule a uok bok e) = sep [ptext (sLit "InlineRule")
+ <+> ppr (a,uok,bok),
+ pprParendIfaceExpr e]
+ ppr (IfLclWrapper a wkr) = ptext (sLit "Worker(lcl):") <+> ppr wkr
+ <+> parens (ptext (sLit "arity") <+> int a)
+ ppr (IfExtWrapper a wkr) = ptext (sLit "Worker(ext0:") <+> ppr wkr
+ <+> parens (ptext (sLit "arity") <+> int a)
+ ppr (IfDFunUnfold ns) = ptext (sLit "DFun:")
+ <+> brackets (pprWithCommas ppr ns)
-- -----------------------------------------------------------------------------
--- Finding the Names in IfaceSyn
+-- | Finding the Names in IfaceSyn
-- This is used for dependency analysis in MkIface, so that we
-- fingerprint a declaration before the things that depend on it. It
-- fingerprinting the instance, so DFuns are not dependencies.
freeNamesIfDecl :: IfaceDecl -> NameSet
-freeNamesIfDecl (IfaceId _s t i) =
+freeNamesIfDecl (IfaceId _s t d i) =
freeNamesIfType t &&&
- freeNamesIfIdInfo i
-freeNamesIfDecl IfaceForeign{} =
+ freeNamesIfIdInfo i &&&
+ freeNamesIfIdDetails d
+freeNamesIfDecl IfaceForeign{} =
emptyNameSet
freeNamesIfDecl d@IfaceData{} =
+ freeNamesIfTvBndrs (ifTyVars d) &&&
freeNamesIfTcFam (ifFamInst d) &&&
freeNamesIfContext (ifCtxt d) &&&
freeNamesIfConDecls (ifCons d)
freeNamesIfDecl d@IfaceSyn{} =
- freeNamesIfType (ifSynRhs d) &&&
+ freeNamesIfTvBndrs (ifTyVars d) &&&
+ freeNamesIfSynRhs (ifSynRhs d) &&&
freeNamesIfTcFam (ifFamInst d)
freeNamesIfDecl d@IfaceClass{} =
+ freeNamesIfTvBndrs (ifTyVars d) &&&
freeNamesIfContext (ifCtxt d) &&&
freeNamesIfDecls (ifATs d) &&&
fnList freeNamesIfClsSig (ifSigs d)
+freeNamesIfIdDetails :: IfaceIdDetails -> NameSet
+freeNamesIfIdDetails (IfRecSelId tc _) = freeNamesIfTc tc
+freeNamesIfIdDetails _ = emptyNameSet
+
-- All other changes are handled via the version info on the tycon
+freeNamesIfSynRhs :: Maybe IfaceType -> NameSet
+freeNamesIfSynRhs (Just ty) = freeNamesIfType ty
+freeNamesIfSynRhs Nothing = emptyNameSet
+
freeNamesIfTcFam :: Maybe (IfaceTyCon, [IfaceType]) -> NameSet
-freeNamesIfTcFam (Just (tc,tys)) =
+freeNamesIfTcFam (Just (tc,tys)) =
freeNamesIfTc tc &&& fnList freeNamesIfType tys
freeNamesIfTcFam Nothing =
emptyNameSet
freeNamesIfConDecls _ = emptyNameSet
freeNamesIfConDecl :: IfaceConDecl -> NameSet
-freeNamesIfConDecl c =
- freeNamesIfContext (ifConCtxt c) &&&
+freeNamesIfConDecl c =
+ freeNamesIfTvBndrs (ifConUnivTvs c) &&&
+ freeNamesIfTvBndrs (ifConExTvs c) &&&
+ freeNamesIfContext (ifConCtxt c) &&&
fnList freeNamesIfType (ifConArgTys c) &&&
fnList freeNamesIfType (map snd (ifConEqSpec c)) -- equality constraints
freeNamesIfPredType :: IfacePredType -> NameSet
-freeNamesIfPredType (IfaceClassP cl tys) =
+freeNamesIfPredType (IfaceClassP cl tys) =
unitNameSet cl &&& fnList freeNamesIfType tys
freeNamesIfPredType (IfaceIParam _n ty) =
freeNamesIfType ty
freeNamesIfType (IfaceTyVar _) = emptyNameSet
freeNamesIfType (IfaceAppTy s t) = freeNamesIfType s &&& freeNamesIfType t
freeNamesIfType (IfacePredTy st) = freeNamesIfPredType st
-freeNamesIfType (IfaceTyConApp tc ts) =
+freeNamesIfType (IfaceTyConApp tc ts) =
freeNamesIfTc tc &&& fnList freeNamesIfType ts
-freeNamesIfType (IfaceForAllTy _tv t) = freeNamesIfType t
+freeNamesIfType (IfaceForAllTy tv t) =
+ freeNamesIfTvBndr tv &&& freeNamesIfType t
freeNamesIfType (IfaceFunTy s t) = freeNamesIfType s &&& freeNamesIfType t
+freeNamesIfType (IfaceCoConApp tc ts) =
+ freeNamesIfCo tc &&& fnList freeNamesIfType ts
+
+freeNamesIfTvBndrs :: [IfaceTvBndr] -> NameSet
+freeNamesIfTvBndrs = fnList freeNamesIfTvBndr
+
+freeNamesIfBndr :: IfaceBndr -> NameSet
+freeNamesIfBndr (IfaceIdBndr b) = freeNamesIfIdBndr b
+freeNamesIfBndr (IfaceTvBndr b) = freeNamesIfTvBndr b
+
+freeNamesIfLetBndr :: IfaceLetBndr -> NameSet
+-- Remember IfaceLetBndr is used only for *nested* bindings
+-- The IdInfo can contain an unfolding (in the case of
+-- local INLINE pragmas), so look there too
+freeNamesIfLetBndr (IfLetBndr _name ty info) = freeNamesIfType ty
+ &&& freeNamesIfIdInfo info
+
+freeNamesIfTvBndr :: IfaceTvBndr -> NameSet
+freeNamesIfTvBndr (_fs,k) = freeNamesIfType k
+ -- kinds can have Names inside, when the Kind is an equality predicate
+
+freeNamesIfIdBndr :: IfaceIdBndr -> NameSet
+freeNamesIfIdBndr = freeNamesIfTvBndr
freeNamesIfIdInfo :: IfaceIdInfo -> NameSet
-freeNamesIfIdInfo NoInfo = emptyNameSet
+freeNamesIfIdInfo NoInfo = emptyNameSet
freeNamesIfIdInfo (HasInfo i) = fnList freeNamesItem i
freeNamesItem :: IfaceInfoItem -> NameSet
-freeNamesItem (HsUnfold u) = freeNamesIfExpr u
-freeNamesItem (HsWorker wkr _) = unitNameSet wkr
-freeNamesItem _ = emptyNameSet
+freeNamesItem (HsUnfold _ u) = freeNamesIfUnfold u
+freeNamesItem _ = emptyNameSet
+
+freeNamesIfUnfold :: IfaceUnfolding -> NameSet
+freeNamesIfUnfold (IfCoreUnfold _ e) = freeNamesIfExpr e
+freeNamesIfUnfold (IfCompulsory e) = freeNamesIfExpr e
+freeNamesIfUnfold (IfInlineRule _ _ _ e) = freeNamesIfExpr e
+freeNamesIfUnfold (IfExtWrapper _ v) = unitNameSet v
+freeNamesIfUnfold (IfLclWrapper {}) = emptyNameSet
+freeNamesIfUnfold (IfDFunUnfold vs) = fnList freeNamesIfExpr (dfunArgExprs vs)
freeNamesIfExpr :: IfaceExpr -> NameSet
-freeNamesIfExpr (IfaceExt v) = unitNameSet v
+freeNamesIfExpr (IfaceExt v) = unitNameSet v
freeNamesIfExpr (IfaceFCall _ ty) = freeNamesIfType ty
freeNamesIfExpr (IfaceType ty) = freeNamesIfType ty
+freeNamesIfExpr (IfaceCo co) = freeNamesIfType co
freeNamesIfExpr (IfaceTuple _ as) = fnList freeNamesIfExpr as
-freeNamesIfExpr (IfaceLam _ body) = freeNamesIfExpr body
+freeNamesIfExpr (IfaceLam b body) = freeNamesIfBndr b &&& freeNamesIfExpr body
freeNamesIfExpr (IfaceApp f a) = freeNamesIfExpr f &&& freeNamesIfExpr a
freeNamesIfExpr (IfaceCast e co) = freeNamesIfExpr e &&& freeNamesIfType co
-freeNamesIfExpr (IfaceNote _n r) = freeNamesIfExpr r
+freeNamesIfExpr (IfaceNote _n r) = freeNamesIfExpr r
-freeNamesIfExpr (IfaceCase s _ ty alts)
- = freeNamesIfExpr s &&& freeNamesIfType ty &&& fnList freeNamesIfaceAlt alts
+freeNamesIfExpr (IfaceCase s _ alts)
+ = freeNamesIfExpr s
+ &&& fnList fn_alt alts &&& fn_cons alts
where
- -- no need to look at the constructor, because we'll already have its
- -- parent recorded by the type on the case expression.
- freeNamesIfaceAlt (_con,_bs,r) = freeNamesIfExpr r
+ fn_alt (_con,_bs,r) = freeNamesIfExpr r
-freeNamesIfExpr (IfaceLet (IfaceNonRec _bndr r) x)
- = freeNamesIfExpr r &&& freeNamesIfExpr x
+ -- Depend on the data constructors. Just one will do!
+ -- Note [Tracking data constructors]
+ fn_cons [] = emptyNameSet
+ fn_cons ((IfaceDefault ,_,_) : xs) = fn_cons xs
+ fn_cons ((IfaceDataAlt con,_,_) : _ ) = unitNameSet con
+ fn_cons (_ : _ ) = emptyNameSet
+
+freeNamesIfExpr (IfaceLet (IfaceNonRec bndr rhs) body)
+ = freeNamesIfLetBndr bndr &&& freeNamesIfExpr rhs &&& freeNamesIfExpr body
freeNamesIfExpr (IfaceLet (IfaceRec as) x)
- = fnList freeNamesIfExpr (map snd as) &&& freeNamesIfExpr x
+ = fnList fn_pair as &&& freeNamesIfExpr x
+ where
+ fn_pair (bndr, rhs) = freeNamesIfLetBndr bndr &&& freeNamesIfExpr rhs
freeNamesIfExpr _ = emptyNameSet
-
freeNamesIfTc :: IfaceTyCon -> NameSet
freeNamesIfTc (IfaceTc tc) = unitNameSet tc
-- ToDo: shouldn't we include IfaceIntTc & co.?
freeNamesIfTc _ = emptyNameSet
+freeNamesIfCo :: IfaceCoCon -> NameSet
+freeNamesIfCo (IfaceCoAx tc) = unitNameSet tc
+freeNamesIfCo _ = emptyNameSet
+
freeNamesIfRule :: IfaceRule -> NameSet
-freeNamesIfRule (IfaceRule _n _a _bs f es rhs _o)
- = unitNameSet f &&& fnList freeNamesIfExpr es &&& freeNamesIfExpr rhs
+freeNamesIfRule (IfaceRule { ifRuleBndrs = bs, ifRuleHead = f
+ , ifRuleArgs = es, ifRuleRhs = rhs })
+ = unitNameSet f &&&
+ fnList freeNamesIfBndr bs &&&
+ fnList freeNamesIfExpr es &&&
+ freeNamesIfExpr rhs
-- helpers
(&&&) :: NameSet -> NameSet -> NameSet
fnList :: (a -> NameSet) -> [a] -> NameSet
fnList f = foldr (&&&) emptyNameSet . map f
\end{code}
+
+Note [Tracking data constructors]
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+In a case expression
+ case e of { C a -> ...; ... }
+You might think that we don't need to include the datacon C
+in the free names, because its type will probably show up in
+the free names of 'e'. But in rare circumstances this may
+not happen. Here's the one that bit me:
+
+ module DynFlags where
+ import {-# SOURCE #-} Packages( PackageState )
+ data DynFlags = DF ... PackageState ...
+
+ module Packages where
+ import DynFlags
+ data PackageState = PS ...
+ lookupModule (df :: DynFlags)
+ = case df of
+ DF ...p... -> case p of
+ PS ... -> ...
+
+Now, lookupModule depends on DynFlags, but the transitive dependency
+on the *locally-defined* type PackageState is not visible. We need
+to take account of the use of the data constructor PS in the pattern match.
+
projects / ghc-hetmet.git / blobdiff