import Module
import StaticFlags ( opt_SccProfilingOn, opt_Hpc )
import Type ( Kind, mkArrowKind, liftedTypeKind, unliftedTypeKind )
+import Class ( FunDep )
import BasicTypes ( Boxity(..), Fixity(..), FixityDirection(..), IPName(..),
Activation(..), RuleMatchInfo(..), defaultInlineSpec )
import DynFlags
-- Type classes
--
cl_decl :: { LTyClDecl RdrName }
- : 'class' tycl_hdr fds where_cls
- {% do { let { (binds, sigs, ats, docs) =
- cvBindsAndSigs (unLoc $4)
- ; (ctxt, tc, tvs, tparms) = unLoc $2}
- ; checkTyVars tparms -- only type vars allowed
- ; checkKindSigs ats
- ; return $ L (comb4 $1 $2 $3 $4)
- (mkClassDecl (ctxt, tc, tvs)
- (unLoc $3) sigs binds ats docs) } }
+ : 'class' tycl_hdr fds where_cls {% mkClassDecl (comb4 $1 $2 $3 $4) $2 $3 $4 }
-- Type declarations (toplevel)
--
--
-- Note the use of type for the head; this allows
-- infix type constructors to be declared
- {% do { (tc, tvs, _) <- checkSynHdr $2 False
- ; return (L (comb2 $1 $4)
- (TySynonym tc tvs Nothing $4))
- } }
+ {% mkTySynonym (comb2 $1 $4) False $2 $4 }
-- type family declarations
| 'type' 'family' type opt_kind_sig
-- Note the use of type for the head; this allows
-- infix type constructors to be declared
- --
- {% do { (tc, tvs, _) <- checkSynHdr $3 False
- ; return (L (comb3 $1 $3 $4)
- (TyFamily TypeFamily tc tvs (unLoc $4)))
- } }
+ {% mkTyFamily (comb3 $1 $3 $4) TypeFamily $3 (unLoc $4) }
-- type instance declarations
| 'type' 'instance' type '=' ctype
-- Note the use of type for the head; this allows
-- infix type constructors and type patterns
- --
- {% do { (tc, tvs, typats) <- checkSynHdr $3 True
- ; return (L (comb2 $1 $5)
- (TySynonym tc tvs (Just typats) $5))
- } }
+ {% mkTySynonym (comb2 $1 $5) True $3 $5 }
-- ordinary data type or newtype declaration
| data_or_newtype tycl_hdr constrs deriving
- {% do { let {(ctxt, tc, tvs, tparms) = unLoc $2}
- ; checkTyVars tparms -- no type pattern
- ; return $!
- sL (comb4 $1 $2 $3 $4)
+ {% mkTyData (comb4 $1 $2 $3 $4) (unLoc $1) False $2
+ Nothing (reverse (unLoc $3)) (unLoc $4) }
-- We need the location on tycl_hdr in case
-- constrs and deriving are both empty
- (mkTyData (unLoc $1) (ctxt, tc, tvs, Nothing)
- Nothing (reverse (unLoc $3)) (unLoc $4)) } }
-- ordinary GADT declaration
| data_or_newtype tycl_hdr opt_kind_sig
'where' gadt_constrlist
deriving
- {% do { let {(ctxt, tc, tvs, tparms) = unLoc $2}
- ; checkTyVars tparms -- can have type pats
- ; return $!
- sL (comb4 $1 $2 $4 $5)
- (mkTyData (unLoc $1) (ctxt, tc, tvs, Nothing)
- (unLoc $3) (reverse (unLoc $5)) (unLoc $6)) } }
+ {% mkTyData (comb4 $1 $2 $4 $5) (unLoc $1) False $2
+ (unLoc $3) (reverse (unLoc $5)) (unLoc $6) }
+ -- We need the location on tycl_hdr in case
+ -- constrs and deriving are both empty
-- data/newtype family
- | 'data' 'family' tycl_hdr opt_kind_sig
- {% do { let {(ctxt, tc, tvs, tparms) = unLoc $3}
- ; checkTyVars tparms -- no type pattern
- ; unless (null (unLoc ctxt)) $ -- and no context
- parseError (getLoc ctxt)
- "A family declaration cannot have a context"
- ; return $
- L (comb3 $1 $2 $4)
- (TyFamily DataFamily tc tvs (unLoc $4)) } }
+ | 'data' 'family' type opt_kind_sig
+ {% mkTyFamily (comb3 $1 $2 $4) DataFamily $3 (unLoc $4) }
-- data/newtype instance declaration
| data_or_newtype 'instance' tycl_hdr constrs deriving
- {% do { let {(ctxt, tc, tvs, tparms) = unLoc $3}
- -- can have type pats
- ; return $
- L (comb4 $1 $3 $4 $5)
- -- We need the location on tycl_hdr in case
- -- constrs and deriving are both empty
- (mkTyData (unLoc $1) (ctxt, tc, tvs, Just tparms)
- Nothing (reverse (unLoc $4)) (unLoc $5)) } }
+ {% mkTyData (comb4 $1 $3 $4 $5) (unLoc $1) True $3
+ Nothing (reverse (unLoc $4)) (unLoc $5) }
-- GADT instance declaration
| data_or_newtype 'instance' tycl_hdr opt_kind_sig
'where' gadt_constrlist
deriving
- {% do { let {(ctxt, tc, tvs, tparms) = unLoc $3}
- -- can have type pats
- ; return $
- L (comb4 $1 $3 $6 $7)
- (mkTyData (unLoc $1) (ctxt, tc, tvs, Just tparms)
- (unLoc $4) (reverse (unLoc $6)) (unLoc $7)) } }
-
--- Associate type family declarations
+ {% mkTyData (comb4 $1 $3 $6 $7) (unLoc $1) True $3
+ (unLoc $4) (reverse (unLoc $6)) (unLoc $7) }
+
+-- Associated type family declarations
--
-- * They have a different syntax than on the toplevel (no family special
-- identifier).
: 'type' type opt_kind_sig
-- Note the use of type for the head; this allows
-- infix type constructors to be declared
- --
- {% do { (tc, tvs, _) <- checkSynHdr $2 False
- ; return (L (comb3 $1 $2 $3)
- (TyFamily TypeFamily tc tvs (unLoc $3)))
- } }
+ {% mkTyFamily (comb3 $1 $2 $3) TypeFamily $2 (unLoc $3) }
-- default type instance
| 'type' type '=' ctype
-- Note the use of type for the head; this allows
-- infix type constructors and type patterns
- --
- {% do { (tc, tvs, typats) <- checkSynHdr $2 True
- ; return (L (comb2 $1 $4)
- (TySynonym tc tvs (Just typats) $4))
- } }
+ {% mkTySynonym (comb2 $1 $4) True $2 $4 }
-- data/newtype family declaration
- | 'data' tycl_hdr opt_kind_sig
- {% do { let {(ctxt, tc, tvs, tparms) = unLoc $2}
- ; checkTyVars tparms -- no type pattern
- ; unless (null (unLoc ctxt)) $ -- and no context
- parseError (getLoc ctxt)
- "A family declaration cannot have a context"
- ; return $
- L (comb3 $1 $2 $3)
- (TyFamily DataFamily tc tvs (unLoc $3))
- } }
-
--- Associate type instances
+ | 'data' type opt_kind_sig
+ {% mkTyFamily (comb3 $1 $2 $3) DataFamily $2 (unLoc $3) }
+
+-- Associated type instances
--
at_decl_inst :: { LTyClDecl RdrName }
-- type instance declarations
: 'type' type '=' ctype
-- Note the use of type for the head; this allows
-- infix type constructors and type patterns
- --
- {% do { (tc, tvs, typats) <- checkSynHdr $2 True
- ; return (L (comb2 $1 $4)
- (TySynonym tc tvs (Just typats) $4))
- } }
+ {% mkTySynonym (comb2 $1 $4) True $2 $4 }
-- data/newtype instance declaration
| data_or_newtype tycl_hdr constrs deriving
- {% do { let {(ctxt, tc, tvs, tparms) = unLoc $2}
- -- can have type pats
- ; return $
- L (comb4 $1 $2 $3 $4)
- -- We need the location on tycl_hdr in case
- -- constrs and deriving are both empty
- (mkTyData (unLoc $1) (ctxt, tc, tvs, Just tparms)
- Nothing (reverse (unLoc $3)) (unLoc $4)) } }
+ {% mkTyData (comb4 $1 $2 $3 $4) (unLoc $1) True $2
+ Nothing (reverse (unLoc $3)) (unLoc $4) }
-- GADT instance declaration
| data_or_newtype tycl_hdr opt_kind_sig
'where' gadt_constrlist
deriving
- {% do { let {(ctxt, tc, tvs, tparms) = unLoc $2}
- -- can have type pats
- ; return $
- L (comb4 $1 $2 $5 $6)
- (mkTyData (unLoc $1) (ctxt, tc, tvs, Just tparms)
- (unLoc $3) (reverse (unLoc $5)) (unLoc $6)) } }
+ {% mkTyData (comb4 $1 $2 $5 $6) (unLoc $1) True $2
+ (unLoc $3) (reverse (unLoc $5)) (unLoc $6) }
data_or_newtype :: { Located NewOrData }
: 'data' { L1 DataType }
-- (Eq a, Ord b) => T a b
-- T Int [a] -- for associated types
-- Rather a lot of inlining here, else we get reduce/reduce errors
-tycl_hdr :: { Located (LHsContext RdrName,
- Located RdrName,
- [LHsTyVarBndr RdrName],
- [LHsType RdrName]) }
- : context '=>' type {% checkTyClHdr $1 $3 >>= return.LL }
- | type {% checkTyClHdr (noLoc []) $1 >>= return.L1 }
+tycl_hdr :: { Located (LHsContext RdrName, LHsType RdrName) }
+ : context '=>' type { LL ($1, $3) }
+ | type { L1 (noLoc [], $1) }
-----------------------------------------------------------------------------
-- Stand-alone deriving
: {- empty -} { Nothing }
| '::' atype { Just $2 }
-sigtypes1 :: { [LHsType RdrName] }
- : sigtype { [ $1 ] }
- | sigtype ',' sigtypes1 { $1 : $3 }
-
-sigtype :: { LHsType RdrName }
+sigtype :: { LHsType RdrName } -- Always a HsForAllTy,
+ -- to tell the renamer where to generalise
: ctype { L1 (mkImplicitHsForAllTy (noLoc []) $1) }
-- Wrap an Implicit forall if there isn't one there already
-sigtypedoc :: { LHsType RdrName }
+sigtypedoc :: { LHsType RdrName } -- Always a HsForAllTy
: ctypedoc { L1 (mkImplicitHsForAllTy (noLoc []) $1) }
-- Wrap an Implicit forall if there isn't one there already
: sig_vars ',' var { LL ($3 : unLoc $1) }
| var { L1 [$1] }
+sigtypes1 :: { [LHsType RdrName] } -- Always HsForAllTys
+ : sigtype { [ $1 ] }
+ | sigtype ',' sigtypes1 { $1 : $3 }
+
-----------------------------------------------------------------------------
-- Types
atype :: { LHsType RdrName }
: gtycon { L1 (HsTyVar (unLoc $1)) }
| tyvar { L1 (HsTyVar (unLoc $1)) }
- | strict_mark atype { LL (HsBangTy (unLoc $1) $2) }
+ | strict_mark atype { LL (HsBangTy (unLoc $1) $2) } -- Constructor sigs only
+ | '{' fielddecls '}' { LL $ HsRecTy $2 } -- Constructor sigs only
| '(' ctype ',' comma_types1 ')' { LL $ HsTupleTy Boxed ($2:$4) }
| '(#' comma_types1 '#)' { LL $ HsTupleTy Unboxed $2 }
| '[' ctype ']' { LL $ HsListTy $2 }
| '(' tyvar '::' kind ')' { LL (KindedTyVar (unLoc $2)
(unLoc $4)) }
-fds :: { Located [Located ([RdrName], [RdrName])] }
+fds :: { Located [Located (FunDep RdrName)] }
: {- empty -} { noLoc [] }
| '|' fds1 { LL (reverse (unLoc $2)) }
-fds1 :: { Located [Located ([RdrName], [RdrName])] }
+fds1 :: { Located [Located (FunDep RdrName)] }
: fds1 ',' fd { LL ($3 : unLoc $1) }
| fd { L1 [$1] }
-fd :: { Located ([RdrName], [RdrName]) }
+fd :: { Located (FunDep RdrName) }
: varids0 '->' varids0 { L (comb3 $1 $2 $3)
(reverse (unLoc $1), reverse (unLoc $3)) }
gadt_constr :: { [LConDecl RdrName] }
: con_list '::' sigtype
{ map (sL (comb2 $1 $3)) (mkGadtDecl (unLoc $1) $3) }
- -- Syntax: Maybe merge the record stuff with the single-case above?
- -- (to kill the mostly harmless reduce/reduce error)
- -- XXX revisit audreyt
- | constr_stuff_record '::' sigtype
- { let (con,details) = unLoc $1 in
- [LL (ConDecl con Implicit [] (noLoc []) details (ResTyGADT $3) Nothing)] }
-{-
- | forall context '=>' constr_stuff_record '::' sigtype
- { let (con,details) = unLoc $4 in
- LL (ConDecl con Implicit (unLoc $1) $2 details (ResTyGADT $6) Nothing ) }
- | forall constr_stuff_record '::' sigtype
- { let (con,details) = unLoc $2 in
- LL (ConDecl con Implicit (unLoc $1) (noLoc []) details (ResTyGADT $4) Nothing) }
--}
+ -- Deprecated syntax for GADT record declarations
+ | oqtycon '{' fielddecls '}' '::' sigtype
+ {% do { cd <- mkDeprecatedGadtRecordDecl (comb2 $1 $6) $1 $3 $6
+ ; return [cd] } }
constrs :: { Located [LConDecl RdrName] }
: {- empty; a GHC extension -} { noLoc [] }
constr :: { LConDecl RdrName }
: maybe_docnext forall context '=>' constr_stuff maybe_docprev
{ let (con,details) = unLoc $5 in
- L (comb4 $2 $3 $4 $5) (ConDecl con Explicit (unLoc $2) $3 details ResTyH98 ($1 `mplus` $6)) }
+ addConDoc (L (comb4 $2 $3 $4 $5) (mkSimpleConDecl con (unLoc $2) $3 details))
+ ($1 `mplus` $6) }
| maybe_docnext forall constr_stuff maybe_docprev
{ let (con,details) = unLoc $3 in
- L (comb2 $2 $3) (ConDecl con Explicit (unLoc $2) (noLoc []) details ResTyH98 ($1 `mplus` $4)) }
+ addConDoc (L (comb2 $2 $3) (mkSimpleConDecl con (unLoc $2) (noLoc []) details))
+ ($1 `mplus` $4) }
forall :: { Located [LHsTyVarBndr RdrName] }
: 'forall' tv_bndrs '.' { LL $2 }
-- C t1 t2 %: D Int
-- in which case C really would be a type constructor. We can't resolve this
-- ambiguity till we come across the constructor oprerator :% (or not, more usually)
- : btype {% mkPrefixCon $1 [] >>= return.LL }
- | oqtycon '{' '}' {% mkRecCon $1 [] >>= return.LL }
- | oqtycon '{' fielddecls '}' {% mkRecCon $1 $3 >>= return.LL }
- | btype conop btype { LL ($2, InfixCon $1 $3) }
-
-constr_stuff_record :: { Located (Located RdrName, HsConDeclDetails RdrName) }
- : oqtycon '{' '}' {% mkRecCon $1 [] >>= return.sL (comb2 $1 $>) }
- | oqtycon '{' fielddecls '}' {% mkRecCon $1 $3 >>= return.sL (comb2 $1 $>) }
-
-fielddecls :: { [([Located RdrName], LBangType RdrName, Maybe (LHsDoc RdrName))] }
- : fielddecl maybe_docnext ',' maybe_docprev fielddecls { addFieldDoc (unLoc $1) $4 : addFieldDocs $5 $2 }
- | fielddecl { [unLoc $1] }
-
-fielddecl :: { Located ([Located RdrName], LBangType RdrName, Maybe (LHsDoc RdrName)) }
- : maybe_docnext sig_vars '::' ctype maybe_docprev { L (comb3 $2 $3 $4) (reverse (unLoc $2), $4, $1 `mplus` $5) }
+ : btype {% splitCon $1 >>= return.LL }
+ | btype conop btype { LL ($2, InfixCon $1 $3) }
+
+fielddecls :: { [ConDeclField RdrName] }
+ : {- empty -} { [] }
+ | fielddecls1 { $1 }
+
+fielddecls1 :: { [ConDeclField RdrName] }
+ : fielddecl maybe_docnext ',' maybe_docprev fielddecls1
+ { [ addFieldDoc f $4 | f <- $1 ] ++ addFieldDocs $5 $2 }
+ -- This adds the doc $4 to each field separately
+ | fielddecl { $1 }
+
+fielddecl :: { [ConDeclField RdrName] } -- A list because of f,g :: Int
+ : maybe_docnext sig_vars '::' ctype maybe_docprev { [ ConDeclField fld $4 ($1 `mplus` $5)
+ | fld <- reverse (unLoc $2) ] }
-- We allow the odd-looking 'inst_type' in a deriving clause, so that
-- we can do deriving( forall a. C [a] ) in a newtype (GHC extension).
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