X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=ghc%2Fcompiler%2Frename%2FParseIface.y;h=2eb828b3813541ebedea1fa9fa80d49f24529f71;hb=438596897ebbe25a07e1c82085cfbc5bdb00f09e;hp=bc4137d4093268cf203e492f18830d666139bbe2;hpb=ae45ff0e9831a0dc862a5d68d03e355d7e323c62;p=ghc-hetmet.git diff --git a/ghc/compiler/rename/ParseIface.y b/ghc/compiler/rename/ParseIface.y index bc4137d..2eb828b 100644 --- a/ghc/compiler/rename/ParseIface.y +++ b/ghc/compiler/rename/ParseIface.y @@ -1,393 +1,666 @@ { -#include "HsVersions.h" - -module ParseIface ( parseIface ) where - -IMP_Ubiq(){-uitous-} +module ParseIface ( parseIface, IfaceStuff(..) ) where -import ParseUtils +#include "HsVersions.h" import HsSyn -- quite a bit of stuff import RdrHsSyn -- oodles of synonyms -import HsPragmas ( noGenPragmas ) - +import HsDecls ( HsIdInfo(..), HsStrictnessInfo(..) ) +import HsTypes ( mkHsForAllTy ) +import HsCore +import Const ( Literal(..), mkMachInt_safe ) +import BasicTypes ( IfaceFlavour(..), Fixity(..), FixityDirection(..), + NewOrData(..), Version + ) +import HsPragmas ( noDataPragmas, noClassPragmas ) +import Type ( Kind, mkArrowKind, boxedTypeKind, openTypeKind ) +import IdInfo ( ArityInfo, exactArity ) +import Lex + +import RnMonad ( ImportVersion, LocalVersion, ParsedIface(..), WhatsImported(..), + RdrNamePragma, ExportItem, RdrAvailInfo, GenAvailInfo(..) + ) import Bag ( emptyBag, unitBag, snocBag ) -import FiniteMap ( emptyFM, unitFM, addToFM, plusFM, bagToFM ) -import Name ( ExportFlag(..), mkTupNameStr, preludeQual, - RdrName(..){-instance Outputable:ToDo:rm-} +import FiniteMap ( emptyFM, unitFM, addToFM, plusFM, bagToFM, FiniteMap ) +import Name ( OccName(..), isTCOcc, Provenance, Module, + mkTupNameStr, mkUbxTupNameStr ) -import Outputable -- ToDo:rm -import PprStyle ( PprStyle(..) ) -- ToDo: rm debugging -import SrcLoc ( mkIfaceSrcLoc ) -import Util ( panic, pprPanic{-ToDo:rm-} ) - ------------------------------------------------------------------ - -parseIface = parseIToks . lexIface +import SrcLoc ( SrcLoc ) +import Maybes +import Outputable ------------------------------------------------------------------ +import GlaExts } -%name parseIToks +%name parseIface %tokentype { IfaceToken } %monad { IfM }{ thenIf }{ returnIf } +%lexer { lexIface } { ITeof } %token - INTERFACE { ITinterface } - USAGES_PART { ITusages } - VERSIONS_PART { ITversions } - EXPORTS_PART { ITexports } - INSTANCE_MODULES_PART { ITinstance_modules } - INSTANCES_PART { ITinstances } - FIXITIES_PART { ITfixities } - DECLARATIONS_PART { ITdeclarations } - PRAGMAS_PART { ITpragmas } - BANG { ITbang } - CBRACK { ITcbrack } - CCURLY { ITccurly } - DCCURLY { ITdccurly } - CLASS { ITclass } - COMMA { ITcomma } - CPAREN { ITcparen } - DARROW { ITdarrow } - DATA { ITdata } - DCOLON { ITdcolon } - DOTDOT { ITdotdot } - EQUAL { ITequal } - INFIX { ITinfix } - INFIXL { ITinfixl } - INFIXR { ITinfixr } - INSTANCE { ITinstance } - NEWTYPE { ITnewtype } - OBRACK { ITobrack } - OCURLY { ITocurly } - DOCURLY { ITdocurly } - OPAREN { IToparen } - RARROW { ITrarrow } - SEMI { ITsemi } - TYPE { ITtype } - VBAR { ITvbar } - WHERE { ITwhere } - INTEGER { ITinteger $$ } - VARID { ITvarid $$ } - CONID { ITconid $$ } - VARSYM { ITvarsym $$ } - CONSYM { ITconsym $$ } - QVARID { ITqvarid $$ } - QCONID { ITqconid $$ } - QVARSYM { ITqvarsym $$ } - QCONSYM { ITqconsym $$ } + 'case' { ITcase } -- Haskell keywords + 'class' { ITclass } + 'data' { ITdata } + 'default' { ITdefault } + 'deriving' { ITderiving } + 'do' { ITdo } + 'else' { ITelse } + 'if' { ITif } + 'import' { ITimport } + 'in' { ITin } + 'infix' { ITinfix } + 'infixl' { ITinfixl } + 'infixr' { ITinfixr } + 'instance' { ITinstance } + 'let' { ITlet } + 'module' { ITmodule } + 'newtype' { ITnewtype } + 'of' { ITof } + 'then' { ITthen } + 'type' { ITtype } + 'where' { ITwhere } + 'as' { ITas } + 'qualified' { ITqualified } + 'hiding' { IThiding } + + '__interface' { ITinterface } -- GHC-extension keywords + '__export' { ITexport } + '__instimport' { ITinstimport } + '__forall' { ITforall } + '__letrec' { ITletrec } + '__coerce' { ITcoerce } + '__inline' { ITinline } + '__DEFAULT' { ITdefaultbranch } + '__bot' { ITbottom } + '__integer' { ITinteger_lit } + '__float' { ITfloat_lit } + '__rational' { ITrational_lit } + '__addr' { ITaddr_lit } + '__litlit' { ITlit_lit } + '__string' { ITstring_lit } + '__ccall' { ITccall $$ } + '__scc' { ITscc $$ } + '__a' { ITtypeapp } + + '__A' { ITarity } + '__P' { ITspecialise } + '__C' { ITnocaf } + '__U' { ITunfold $$ } + '__S' { ITstrict $$ } + + '..' { ITdotdot } -- reserved symbols + '::' { ITdcolon } + '=' { ITequal } + '\\' { ITlam } + '|' { ITvbar } + '<-' { ITlarrow } + '->' { ITrarrow } + '@' { ITat } + '~' { ITtilde } + '=>' { ITdarrow } + '-' { ITminus } + '!' { ITbang } + + '/\\' { ITbiglam } -- GHC-extension symbols + + '{' { ITocurly } -- special symbols + '}' { ITccurly } + '[' { ITobrack } + ']' { ITcbrack } + '(' { IToparen } + ')' { ITcparen } + '(#' { IToubxparen } + '#)' { ITcubxparen } + ';' { ITsemi } + ',' { ITcomma } + + VARID { ITvarid $$ } -- identifiers + CONID { ITconid $$ } + VARSYM { ITvarsym $$ } + CONSYM { ITconsym $$ } + QVARID { ITqvarid $$ } + QCONID { ITqconid $$ } + QVARSYM { ITqvarsym $$ } + QCONSYM { ITqconsym $$ } + + PRAGMA { ITpragma $$ } + + CHAR { ITchar $$ } + STRING { ITstring $$ } + INTEGER { ITinteger $$ } + RATIONAL { ITrational $$ } + + UNKNOWN { ITunknown $$ } %% +-- iface_stuff is the main production. +-- It recognises (a) a whole interface file +-- (b) a type (so that type sigs can be parsed lazily) +-- (c) the IdInfo part of a signature (same reason) + +iface_stuff :: { IfaceStuff } +iface_stuff : iface { PIface $1 } + | type { PType $1 } + | id_info { PIdInfo $1 } + + iface :: { ParsedIface } -iface : INTERFACE CONID INTEGER - usages_part versions_part - exports_part inst_modules_part - fixities_part decls_part instances_part pragmas_part - { case $9 of { (tm, vm) -> - ParsedIface $2 (panic "merge modules") (fromInteger $3) Nothing{-src version-} - $4 -- usages - $5 -- local versions - $6 -- exports map - $7 -- instance modules - $8 -- fixities map - tm -- decls maps - vm - $10 -- local instances - $11 -- pragmas map - } --------------------------------------------------------------------------- +iface : '__interface' CONID INTEGER checkVersion 'where' + import_part + instance_import_part + exports_part + fixities_part + instance_decl_part + decls_part + { ParsedIface + $2 -- Module name + (fromInteger $3) -- Module version + (reverse $6) -- Usages + (reverse $8) -- Exports + (reverse $7) -- Instance import modules + (reverse $9) -- Fixities + (reverse $11) -- Decls + (reverse $10) -- Local instances } -usages_part :: { UsagesMap } -usages_part : USAGES_PART module_stuff_pairs { bagToFM $2 } - | { emptyFM } - -versions_part :: { VersionsMap } -versions_part : VERSIONS_PART name_version_pairs { bagToFM $2 } - | { emptyFM } - -module_stuff_pairs :: { Bag (Module, (Version, FiniteMap FAST_STRING Version)) } -module_stuff_pairs : module_stuff_pair - { unitBag $1 } - | module_stuff_pairs module_stuff_pair - { $1 `snocBag` $2 } - -module_stuff_pair :: { (Module, (Version, FiniteMap FAST_STRING Version)) } -module_stuff_pair : CONID INTEGER DCOLON name_version_pairs SEMI - { ($1, (fromInteger $2, bagToFM $4)) } - -name_version_pairs :: { Bag (FAST_STRING, Int) } -name_version_pairs : name_version_pair - { unitBag $1 } - | name_version_pairs name_version_pair - { $1 `snocBag` $2 } - -name_version_pair :: { (FAST_STRING, Int) } -name_version_pair : name INTEGER - { ($1, fromInteger $2) -------------------------------------------------------------------------- - } -exports_part :: { ExportsMap } -exports_part : EXPORTS_PART export_items { bagToFM $2 } - | { emptyFM } +import_part :: { [ImportVersion OccName] } +import_part : { [] } + | import_part import_decl { $2 : $1 } + +import_decl :: { ImportVersion OccName } +import_decl : 'import' mod_name opt_bang INTEGER '::' whats_imported ';' + { ($2, $3, fromInteger $4, $6) } -export_items :: { Bag (FAST_STRING, (OrigName, ExportFlag)) } -export_items : export_item { unitBag $1 } - | export_items export_item { $1 `snocBag` $2 } +whats_imported :: { WhatsImported OccName } +whats_imported : { Everything } + | name_version_pair name_version_pairs { Specifically ($1:$2) } -export_item :: { (FAST_STRING, (OrigName, ExportFlag)) } -export_item : CONID name maybe_dotdot { ($2, (OrigName $1 $2, $3)) } +name_version_pairs :: { [LocalVersion OccName] } +name_version_pairs : { [] } + | name_version_pair name_version_pairs { $1 : $2 } -maybe_dotdot :: { ExportFlag } -maybe_dotdot : DOTDOT { ExportAll } - | { ExportAbs --------------------------------------------------------------------------- - } +name_version_pair :: { LocalVersion OccName } +name_version_pair : entity_occ INTEGER { ($1, fromInteger $2) } -inst_modules_part :: { Bag Module } -inst_modules_part : INSTANCE_MODULES_PART mod_list { $2 } - | { emptyBag } +instance_import_part :: { [Module] } +instance_import_part : { [] } + | instance_import_part '__instimport' mod_name ';' + { $3 : $1 } -mod_list :: { Bag Module } -mod_list : CONID { unitBag $1 } - | mod_list CONID { $1 `snocBag` $2 -------------------------------------------------------------------------- - } -fixities_part :: { FixitiesMap } -fixities_part : FIXITIES_PART fixes { $2 } - | { emptyFM } +exports_part :: { [ExportItem] } +exports_part : { [] } + | exports_part '__export' opt_bang mod_name entities ';' + { ($4,$3,$5) : $1 } -fixes :: { FixitiesMap } -fixes : fix { case $1 of (k,v) -> unitFM k v } - | fixes fix { case $2 of (k,v) -> addToFM $1 k v } +opt_bang :: { IfaceFlavour } +opt_bang : { HiFile } + | '!' { HiBootFile } -fix :: { (FAST_STRING, RdrNameFixityDecl) } -fix : INFIXL INTEGER qname SEMI { (de_qual $3, InfixL $3 (fromInteger $2)) } - | INFIXR INTEGER qname SEMI { (de_qual $3, InfixR $3 (fromInteger $2)) } - | INFIX INTEGER qname SEMI { (de_qual $3, InfixN $3 (fromInteger $2)) --------------------------------------------------------------------------- - } - -decls_part :: { (LocalTyDefsMap, LocalValDefsMap) } -decls_part : DECLARATIONS_PART topdecls { $2 } - | { (emptyFM, emptyFM) } - -topdecls :: { (LocalTyDefsMap, LocalValDefsMap) } -topdecls : topdecl { $1 } - | topdecls topdecl { case $1 of { (ts1, vs1) -> - case $2 of { (ts2, vs2) -> - (plusFM ts1 ts2, plusFM vs1 vs2)}} - } - -topdecl :: { (LocalTyDefsMap, LocalValDefsMap) } -topdecl : typed SEMI { ($1, emptyFM) } - | datad SEMI { $1 } - | newtd SEMI { $1 } - | classd SEMI { $1 } - | decl { case $1 of { (n, Sig qn ty _ loc) -> - (emptyFM, unitFM n (ValSig qn loc ty)) } - } +entities :: { [RdrAvailInfo] } +entities : { [] } + | entity entities { $1 : $2 } -typed :: { LocalTyDefsMap } -typed : TYPE simple EQUAL type { mk_type $2 $4 } +entity :: { RdrAvailInfo } +entity : entity_occ { if isTCOcc $1 + then AvailTC $1 [$1] + else Avail $1 } + | entity_occ stuff_inside { AvailTC $1 ($1:$2) } + | entity_occ '|' stuff_inside { AvailTC $1 $3 } -datad :: { (LocalTyDefsMap, LocalValDefsMap) } -datad : DATA simple EQUAL constrs { mk_data [] $2 $4 } - | DATA context DARROW simple EQUAL constrs { mk_data $2 $4 $6 } +stuff_inside :: { [OccName] } +stuff_inside : '{' val_occs '}' { $2 } -newtd :: { (LocalTyDefsMap, LocalValDefsMap) } -newtd : NEWTYPE simple EQUAL constr1 { mk_new [] $2 $4 } - | NEWTYPE context DARROW simple EQUAL constr1 { mk_new $2 $4 $6 } +-------------------------------------------------------------------------- -classd :: { (LocalTyDefsMap, LocalValDefsMap) } -classd : CLASS class cbody { mk_class [] $2 $3 } - | CLASS context DARROW class cbody { mk_class $2 $4 $5 } +fixities_part :: { [(OccName,Fixity)] } +fixities_part : { [] } + | fixities_part fixity_decl ';' { $2 : $1 } -cbody :: { [(FAST_STRING, RdrNameSig)] } -cbody : WHERE OCURLY decls CCURLY { $3 } - | { [] } +fixity_decl :: { (OccName,Fixity) } +fixity_decl : 'infixl' mb_fix val_occ { ($3, Fixity $2 InfixL) } + | 'infixr' mb_fix val_occ { ($3, Fixity $2 InfixR) } + | 'infix' mb_fix val_occ { ($3, Fixity $2 InfixN) } -decls :: { [(FAST_STRING, RdrNameSig)] } -decls : decl { [$1] } - | decls decl { $1 ++ [$2] } +mb_fix :: { Int } +mb_fix : {-nothing-} { 9 } + | INTEGER { (fromInteger $1) } -decl :: { (FAST_STRING, RdrNameSig) } -decl : var DCOLON ctype SEMI { (de_qual $1, Sig $1 $3 noGenPragmas mkIfaceSrcLoc) } +----------------------------------------------------------------------------- -context :: { RdrNameContext } -context : DOCURLY context_list DCCURLY { reverse $2 } - -context_list :: { RdrNameContext{-reversed-} } -context_list : class { [$1] } - | context_list COMMA class { $3 : $1 } - -class :: { (RdrName, RdrName) } -class : gtycon VARID { ($1, Unqual $2) } - -ctype :: { RdrNamePolyType } -ctype : context DARROW type { HsPreForAllTy $1 $3 } - | type { HsPreForAllTy [] $1 } - -type :: { RdrNameMonoType } -type : btype { $1 } - | btype RARROW type { MonoFunTy $1 $3 } - -types :: { [RdrNameMonoType] } -types : type { [$1] } - | types COMMA type { $1 ++ [$3] } - -btype :: { RdrNameMonoType } -btype : gtyconapp { case $1 of (tc, tys) -> MonoTyApp tc tys } - | ntyconapp { case $1 of { (ty1, tys) -> - if null tys - then ty1 - else - case ty1 of { - MonoTyVar tv -> MonoTyApp tv tys; - MonoTyApp tc ts -> MonoTyApp tc (ts++tys); - MonoFunTy t1 t2 -> MonoTyApp (preludeQual SLIT("->")) (t1:t2:tys); - MonoListTy ty -> MonoTyApp (preludeQual SLIT("[]")) (ty:tys); - MonoTupleTy ts -> MonoTyApp (preludeQual (mkTupNameStr (length ts))) - (ts++tys); - _ -> pprPanic "test:" (ppr PprDebug $1) - }} - } +csigs :: { [RdrNameSig] } +csigs : { [] } + | 'where' '{' csigs1 '}' { $3 } -ntyconapp :: { (RdrNameMonoType, [RdrNameMonoType]) } -ntyconapp : ntycon { ($1, []) } - | ntyconapp atype { case $1 of (t1,tys) -> (t1, tys ++ [$2]) } +csigs1 :: { [RdrNameSig] } +csigs1 : csig { [$1] } + | csig ';' csigs1 { $1 : $3 } -gtyconapp :: { (RdrName, [RdrNameMonoType]) } -gtyconapp : gtycon { ($1, []) } - | gtyconapp atype { case $1 of (tc,tys) -> (tc, tys ++ [$2]) } +csig :: { RdrNameSig } +csig : src_loc var_name '::' type { ClassOpSig $2 Nothing $4 $1 } + | src_loc var_name '=' '::' type + { ClassOpSig $2 + (Just (error "Un-filled-in default method")) + $5 $1 } -atype :: { RdrNameMonoType } -atype : gtycon { MonoTyApp $1 [] } - | ntycon { $1 } +-------------------------------------------------------------------------- -atypes :: { [RdrNameMonoType] } -atypes : atype { [$1] } - | atypes atype { $1 ++ [$2] } +instance_decl_part :: { [RdrNameInstDecl] } +instance_decl_part : {- empty -} { [] } + | instance_decl_part inst_decl { $2 : $1 } + +inst_decl :: { RdrNameInstDecl } +inst_decl : src_loc 'instance' type '=' var_name ';' + { InstDecl $3 + EmptyMonoBinds {- No bindings -} + [] {- No user pragmas -} + (Just $5) {- Dfun id -} + $1 + } -ntycon :: { RdrNameMonoType } -ntycon : VARID { MonoTyVar (Unqual $1) } - | OPAREN type COMMA types CPAREN { MonoTupleTy ($2 : $4) } - | OBRACK type CBRACK { MonoListTy $2 } - | OPAREN type CPAREN { $2 } +-------------------------------------------------------------------------- -gtycon :: { RdrName } -gtycon : QCONID { $1 } - | OPAREN RARROW CPAREN { preludeQual SLIT("->") } - | OBRACK CBRACK { preludeQual SLIT("[]") } - | OPAREN CPAREN { preludeQual SLIT("()") } - | OPAREN commas CPAREN { preludeQual (mkTupNameStr $2) } +decls_part :: { [(Version, RdrNameHsDecl)] } +decls_part + : {- empty -} { [] } + | decls_part version decl ';' { ($2,$3):$1 } + +decl :: { RdrNameHsDecl } +decl : src_loc var_name '::' type maybe_idinfo + { SigD (IfaceSig $2 $4 ($5 $2) $1) } + | src_loc 'type' tc_name tv_bndrs '=' type + { TyD (TySynonym $3 $4 $6 $1) } + | src_loc 'data' decl_context data_fs tv_bndrs constrs + { TyD (TyData DataType $3 (Unqual (TCOcc $4)) $5 $6 Nothing noDataPragmas $1) } + | src_loc 'newtype' decl_context tc_name tv_bndrs newtype_constr + { TyD (TyData NewType $3 $4 $5 $6 Nothing noDataPragmas $1) } + | src_loc 'class' decl_context tc_name tv_bndrs csigs + { ClD (mkClassDecl $3 $4 $5 $6 EmptyMonoBinds + noClassPragmas $1) } +maybe_idinfo :: { RdrName -> [HsIdInfo RdrName] } +maybe_idinfo : {- empty -} { \_ -> [] } + | src_loc PRAGMA { \x -> + case parseIface $2 $1 of + Succeeded (PIdInfo id_info) -> id_info + other -> pprPanic "IdInfo parse failed" + (ppr x) + } -commas :: { Int } -commas : COMMA { 2{-1 comma => arity 2-} } - | commas COMMA { $1 + 1 } +----------------------------------------------------------------------------- -simple :: { (RdrName, [FAST_STRING]) } -simple : gtycon { ($1, []) } - | gtyconvars { case $1 of (tc,tvs) -> (tc, reverse tvs) } +version :: { Version } +version : INTEGER { fromInteger $1 } -gtyconvars :: { (RdrName, [FAST_STRING] {-reversed-}) } -gtyconvars : gtycon VARID { ($1, [$2]) } - | gtyconvars VARID { case $1 of (tc,tvs) -> (tc, $2 : tvs) } +decl_context :: { RdrNameContext } +decl_context : { [] } + | '{' context_list1 '}' '=>' { $2 } -constrs :: { [(RdrName, RdrNameConDecl)] } -constrs : constr { [$1] } - | constrs VBAR constr { $1 ++ [$3] } +---------------------------------------------------------------- -constr :: { (RdrName, RdrNameConDecl) } -constr : btyconapp - { case $1 of (con, tys) -> (con, ConDecl con tys mkIfaceSrcLoc) } - | QCONSYM { ($1, ConDecl $1 [] mkIfaceSrcLoc) } - | QCONSYM batypes { ($1, ConDecl $1 $2 mkIfaceSrcLoc) } - | gtycon OCURLY fields CCURLY - { ($1, RecConDecl $1 $3 mkIfaceSrcLoc) } +constrs :: { [RdrNameConDecl] {- empty for handwritten abstract -} } + : { [] } + | '=' constrs1 { $2 } -btyconapp :: { (RdrName, [RdrNameBangType]) } -btyconapp : gtycon { ($1, []) } - | btyconapp batype { case $1 of (tc,tys) -> (tc, tys ++ [$2]) } +constrs1 :: { [RdrNameConDecl] } +constrs1 : constr { [$1] } + | constr '|' constrs1 { $1 : $3 } -bbtype :: { RdrNameBangType } -bbtype : btype { Unbanged (HsPreForAllTy [] $1) } - | BANG atype { Banged (HsPreForAllTy [] $2) } +constr :: { RdrNameConDecl } +constr : src_loc ex_stuff data_fs batypes { mkConDecl (Unqual (VarOcc $3)) $2 (VanillaCon $4) $1 } + | src_loc ex_stuff data_fs '{' fields1 '}' { mkConDecl (Unqual (VarOcc $3)) $2 (RecCon $5) $1 } + -- We use "data_fs" so as to include () -batype :: { RdrNameBangType } -batype : atype { Unbanged (HsPreForAllTy [] $1) } - | BANG atype { Banged (HsPreForAllTy [] $2) } +newtype_constr :: { [RdrNameConDecl] {- Empty if handwritten abstract -} } +newtype_constr : { [] } + | src_loc '=' ex_stuff data_name atype { [mkConDecl $4 $3 (NewCon $5) $1] } + +ex_stuff :: { ([HsTyVar RdrName], RdrNameContext) } +ex_stuff : { ([],[]) } + | '__forall' forall context '=>' { ($2,$3) } batypes :: { [RdrNameBangType] } -batypes : batype { [$1] } - | batypes batype { $1 ++ [$2] } +batypes : { [] } + | batype batypes { $1 : $2 } + +batype :: { RdrNameBangType } +batype : atype { Unbanged $1 } + | '!' atype { Banged $2 } -fields :: { [([RdrName], RdrNameBangType)] } -fields : field { [$1] } - | fields COMMA field { $1 ++ [$3] } +fields1 :: { [([RdrName], RdrNameBangType)] } +fields1 : field { [$1] } + | field ',' fields1 { $1 : $3 } field :: { ([RdrName], RdrNameBangType) } -field : var DCOLON type { ([$1], Unbanged (HsPreForAllTy [] $3)) } - | var DCOLON BANG atype { ([$1], Banged (HsPreForAllTy [] $4)) } - -constr1 :: { (RdrName, RdrNameMonoType) } -constr1 : gtycon atype { ($1, $2) } - -var :: { RdrName } -var : QVARID { $1 } - | QVARSYM { $1 } - -qname :: { RdrName } -qname : QVARID { $1 } - | QCONID { $1 } - | QVARSYM { $1 } - | QCONSYM { $1 } - -name :: { FAST_STRING } -name : VARID { $1 } - | CONID { $1 } - | VARSYM { $1 } - | BANG { SLIT("!"){-sigh, double-sigh-} } - | CONSYM { $1 } - -instances_part :: { Bag RdrIfaceInst } -instances_part : INSTANCES_PART instdecls { $2 } - | { emptyBag } - -instdecls :: { Bag RdrIfaceInst } -instdecls : instd { unitBag $1 } - | instdecls instd { $1 `snocBag` $2 } - -instd :: { RdrIfaceInst } -instd : INSTANCE context DARROW gtycon restrict_inst SEMI { mk_inst $2 $4 $5 } - | INSTANCE gtycon general_inst SEMI { mk_inst [] $2 $3 } - -restrict_inst :: { RdrNameMonoType } -restrict_inst : gtycon { MonoTyApp $1 [] } - | OPAREN gtyconvars CPAREN { case $2 of (tc,tvs) -> MonoTyApp tc (map en_mono tvs) } - | OPAREN VARID COMMA tyvar_list CPAREN { MonoTupleTy (map en_mono ($2:$4)) } - | OBRACK VARID CBRACK { MonoListTy (en_mono $2) } - | OPAREN VARID RARROW VARID CPAREN { MonoFunTy (en_mono $2) (en_mono $4) } - -general_inst :: { RdrNameMonoType } -general_inst : gtycon { MonoTyApp $1 [] } - | OPAREN gtyconapp CPAREN { case $2 of (tc,tys) -> MonoTyApp tc tys } - | OPAREN type COMMA types CPAREN { MonoTupleTy ($2:$4) } - | OBRACK type CBRACK { MonoListTy $2 } - | OPAREN btype RARROW type CPAREN { MonoFunTy $2 $4 } - -tyvar_list :: { [FAST_STRING] } -tyvar_list : VARID { [$1] } - | tyvar_list COMMA VARID { $1 ++ [$3] +field : var_names1 '::' type { ($1, Unbanged $3) } + | var_names1 '::' '!' type { ($1, Banged $4) } -------------------------------------------------------------------------- - } -pragmas_part :: { LocalPragmasMap } -pragmas_part : PRAGMAS_PART - { emptyFM } - | { emptyFM } +type :: { RdrNameHsType } +type : '__forall' forall context '=>' type + { mkHsForAllTy $2 $3 $5 } + | btype '->' type { MonoFunTy $1 $3 } + | btype { $1 } + +forall :: { [HsTyVar RdrName] } +forall : '[' tv_bndrs ']' { $2 } + +context :: { RdrNameContext } +context : { [] } + | '{' context_list1 '}' { $2 } + +context_list1 :: { RdrNameContext } +context_list1 : class { [$1] } + | class ',' context_list1 { $1 : $3 } + +class :: { (RdrName, [RdrNameHsType]) } +class : qtc_name atypes { ($1, $2) } + +types2 :: { [RdrNameHsType] {- Two or more -} } +types2 : type ',' type { [$1,$3] } + | type ',' types2 { $1 : $3 } + +btype :: { RdrNameHsType } +btype : atype { $1 } + | btype atype { MonoTyApp $1 $2 } + +atype :: { RdrNameHsType } +atype : qtc_name { MonoTyVar $1 } + | tv_name { MonoTyVar $1 } + | '(' ')' { MonoTupleTy [] True } + | '(' types2 ')' { MonoTupleTy $2 True{-boxed-} } + | '(#' type '#)' { MonoTupleTy [$2] False{-unboxed-} } + | '(#' types2 '#)' { MonoTupleTy $2 False{-unboxed-} } + | '[' type ']' { MonoListTy $2 } + | '{' qtc_name atypes '}' { MonoDictTy $2 $3 } + | '(' type ')' { $2 } + +atypes :: { [RdrNameHsType] {- Zero or more -} } +atypes : { [] } + | atype atypes { $1 : $2 } +--------------------------------------------------------------------- + +mod_name :: { Module } + : CONID { $1 } + +var_fs :: { FAST_STRING } + : VARID { $1 } + | VARSYM { $1 } + | '-' { SLIT("-") } + | '!' { SLIT("!") } + +data_fs :: { FAST_STRING } + : CONID { $1 } + | CONSYM { $1 } + | '->' { SLIT("->") } + | '(' ')' { SLIT("()") } + | '(' commas ')' { snd (mkTupNameStr $2) } + | '[' ']' { SLIT("[]") } + +commas :: { Int } + : ',' { 2 } + | commas ',' { $1 + 1 } + +val_occ :: { OccName } + : var_fs { VarOcc $1 } + | data_fs { VarOcc $1 } + +val_occs :: { [OccName] } + : val_occ { [$1] } + | val_occ val_occs { $1 : $2 } + +entity_occ :: { OccName } + : var_fs { VarOcc $1 } + | data_fs { TCOcc $1 } + +var_name :: { RdrName } +var_name : var_fs { Unqual (VarOcc $1) } + +qvar_name :: { RdrName } +qvar_name : var_name { $1 } + | QVARID { lexVarQual $1 } + | QVARSYM { lexVarQual $1 } + +var_names :: { [RdrName] } +var_names : { [] } + | var_name var_names { $1 : $2 } + +var_names1 :: { [RdrName] } +var_names1 : var_name var_names { $1 : $2 } + +data_name :: { RdrName } + : CONID { Unqual (VarOcc $1) } + | CONSYM { Unqual (VarOcc $1) } + | '(' commas ')' { Unqual (VarOcc (snd (mkTupNameStr $2))) } + | '[' ']' { Unqual (VarOcc SLIT("[]")) } + +qdata_name :: { RdrName } +qdata_name : data_name { $1 } + | QCONID { lexVarQual $1 } + | QCONSYM { lexVarQual $1 } + +qdata_names :: { [RdrName] } +qdata_names : { [] } + | qdata_name qdata_names { $1 : $2 } + +tc_name :: { RdrName } +tc_name : CONID { Unqual (TCOcc $1) } + | CONSYM { Unqual (TCOcc $1) } + | '(' '->' ')' { Unqual (TCOcc SLIT("->")) } + | '(' commas ')' { Unqual (TCOcc (snd (mkTupNameStr $2))) } + | '[' ']' { Unqual (TCOcc SLIT("[]")) } + +qtc_name :: { RdrName } +qtc_name : tc_name { $1 } + | QCONID { lexTcQual $1 } + | QCONSYM { lexTcQual $1 } + +tv_name :: { RdrName } +tv_name : VARID { Unqual (TvOcc $1) } + | VARSYM { Unqual (TvOcc $1) {- Allow t2 as a tyvar -} } + +tv_bndr :: { HsTyVar RdrName } +tv_bndr : tv_name '::' akind { IfaceTyVar $1 $3 } + | tv_name { UserTyVar $1 } + +tv_bndrs :: { [HsTyVar RdrName] } + : { [] } + | tv_bndr tv_bndrs { $1 : $2 } + +kind :: { Kind } + : akind { $1 } + | akind '->' kind { mkArrowKind $1 $3 } + +akind :: { Kind } + : VARSYM { if $1 == SLIT("*") then + boxedTypeKind + else if $1 == SLIT("**") then + openTypeKind + else panic "ParseInterface: akind" + } + | '(' kind ')' { $2 } + +-------------------------------------------------------------------------- + +id_info :: { [HsIdInfo RdrName] } +id_info : { [] } + | id_info_item id_info { $1 : $2 } + +id_info_item :: { HsIdInfo RdrName } +id_info_item : '__A' arity_info { HsArity $2 } + | strict_info { HsStrictness $1 } + | '__bot' { HsStrictness HsBottom } + | '__U' core_expr { HsUnfold $1 (Just $2) } + | '__U' { HsUnfold $1 Nothing } + | '__P' spec_tvs + atypes '=' core_expr { HsSpecialise $2 $3 $5 } + | '__C' { HsNoCafRefs } + + +spec_tvs :: { [HsTyVar RdrName] } +spec_tvs : '[' tv_bndrs ']' { $2 } + + +arity_info :: { ArityInfo } +arity_info : INTEGER { exactArity (fromInteger $1) } + +strict_info :: { HsStrictnessInfo RdrName } +strict_info : '__S' qvar_name '{' qdata_names '}' + { HsStrictnessInfo $1 (Just ($2,$4)) } + | '__S' qvar_name { HsStrictnessInfo $1 (Just ($2,[])) } + | '__S' { HsStrictnessInfo $1 Nothing } + +------------------------------------------------------- +core_expr :: { UfExpr RdrName } +core_expr : '\\' core_bndrs '->' core_expr { foldr UfLam $4 $2 } + | 'case' core_expr 'of' var_name + '{' core_alts '}' { UfCase $2 $4 $6 } + + | 'let' '{' core_val_bndr '=' core_expr + '}' 'in' core_expr { UfLet (UfNonRec $3 $5) $8 } + | '__letrec' '{' rec_binds '}' + 'in' core_expr { UfLet (UfRec $3) $6 } + + | con_or_primop '{' core_args '}' { UfCon $1 $3 } + | '__litlit' STRING atype { UfCon (UfLitLitCon $2 $3) [] } + + | '__inline' core_expr { UfNote UfInlineCall $2 } + | '__coerce' atype core_expr { UfNote (UfCoerce $2) $3 } + | '__scc' core_expr { UfNote (UfSCC $1) $2 } + | fexpr { $1 } + +fexpr :: { UfExpr RdrName } +fexpr : fexpr core_arg { UfApp $1 $2 } + | core_aexpr { $1 } + +core_arg :: { UfExpr RdrName } + : '__a' atype { UfType $2 } + | core_aexpr { $1 } + +core_args :: { [UfExpr RdrName] } + : { [] } + | core_arg core_args { $1 : $2 } + +core_aexpr :: { UfExpr RdrName } -- Atomic expressions +core_aexpr : qvar_name { UfVar $1 } + + | qdata_name { UfVar $1 } + -- This one means that e.g. "True" will parse as + -- (UfVar True_Id) rather than (UfCon True_Con []). + -- No big deal; it'll be inlined in a jiffy. I tried + -- parsing it to (Con con []) directly, but got bitten + -- when a real constructor Id showed up in an interface + -- file. As usual, a hack bites you in the end. + -- If you want to get a UfCon, then use the + -- curly-bracket notation (True {}). + + | core_lit { UfCon (UfLitCon $1) [] } + | '(' core_expr ')' { $2 } + | '(' ')' { UfTuple (mkTupConRdrName 0) [] } + | '(' comma_exprs2 ')' { UfTuple (mkTupConRdrName (length $2)) $2 } + | '(#' core_expr '#)' { UfTuple (mkUbxTupConRdrName 1) [$2] } + | '(#' comma_exprs2 '#)' { UfTuple (mkUbxTupConRdrName (length $2)) $2 } + +comma_exprs2 :: { [UfExpr RdrName] } -- Two or more +comma_exprs2 : core_expr ',' core_expr { [$1,$3] } + | core_expr ',' comma_exprs2 { $1 : $3 } + +con_or_primop :: { UfCon RdrName } +con_or_primop : qdata_name { UfDataCon $1 } + | qvar_name { UfPrimOp $1 } + | '__ccall' ccall_string { let + (is_casm, may_gc) = $1 + in + UfCCallOp $2 is_casm may_gc + } + +rec_binds :: { [(UfBinder RdrName, UfExpr RdrName)] } + : { [] } + | core_val_bndr '=' core_expr ';' rec_binds { ($1,$3) : $5 } + +core_alts :: { [UfAlt RdrName] } + : core_alt { [$1] } + | core_alt ';' core_alts { $1 : $3 } + +core_alt :: { UfAlt RdrName } +core_alt : core_pat '->' core_expr { (fst $1, snd $1, $3) } + +core_pat :: { (UfCon RdrName, [RdrName]) } +core_pat : core_lit { (UfLitCon $1, []) } + | '__litlit' STRING atype { (UfLitLitCon $2 $3, []) } + | qdata_name var_names { (UfDataCon $1, $2) } + | '(' comma_var_names ')' { (UfDataCon (mkTupConRdrName (length $2)), $2) } + | '(#' comma_var_names1 '#)' { (UfDataCon (mkUbxTupConRdrName (length $2)), $2) } + | '__DEFAULT' { (UfDefault, []) } + | '(' core_pat ')' { $2 } + + +comma_var_names :: { [RdrName] } -- Zero, or two or more +comma_var_names : { [] } + | var_name ',' comma_var_names1 { $1 : $3 } + +comma_var_names1 :: { [RdrName] } -- One or more +comma_var_names1 : var_name { [$1] } + | var_name ',' comma_var_names1 { $1 : $3 } + +core_lit :: { Literal } +core_lit : INTEGER { mkMachInt_safe $1 } + | CHAR { MachChar $1 } + | STRING { MachStr $1 } + | '__string' STRING { NoRepStr $2 (panic "NoRepStr type") } + | RATIONAL { MachDouble $1 } + | '__float' RATIONAL { MachFloat $2 } + + | '__integer' INTEGER { NoRepInteger $2 (panic "NoRepInteger type") + -- The type checker will add the types + } + + | '__rational' INTEGER INTEGER { NoRepRational ($2 % $3) + (panic "NoRepRational type") + -- The type checker will add the type + } + + | '__addr' INTEGER { MachAddr $2 } + +core_bndr :: { UfBinder RdrName } +core_bndr : core_val_bndr { $1 } + | core_tv_bndr { $1 } + +core_bndrs :: { [UfBinder RdrName] } +core_bndrs : { [] } + | core_bndr core_bndrs { $1 : $2 } + +core_val_bndr :: { UfBinder RdrName } +core_val_bndr : var_name '::' atype { UfValBinder $1 $3 } + +core_tv_bndr :: { UfBinder RdrName } +core_tv_bndr : '__a' tv_name '::' akind { UfTyBinder $2 $4 } + | '__a' tv_name { UfTyBinder $2 boxedTypeKind } + +ccall_string :: { FAST_STRING } + : STRING { $1 } + | VARID { $1 } + | CONID { $1 } + +------------------------------------------------------------------- + +src_loc :: { SrcLoc } +src_loc : {% getSrcLocIf } + +checkVersion :: { () } + : {-empty-} {% checkVersion Nothing } + | INTEGER {% checkVersion (Just (fromInteger $1)) } + +------------------------------------------------------------------- + +-- Haskell code { + +data IfaceStuff = PIface ParsedIface + | PIdInfo [HsIdInfo RdrName] + | PType RdrNameHsType + +mkConDecl name (ex_tvs, ex_ctxt) details loc = ConDecl name ex_tvs ex_ctxt details loc }