1 {- Notes about the syntax of interface files
2 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
5 interface "edison" M 4 6 2 ! 406 Module M, version 4, from package 'edison',
6 Fixities version 6, rules version 2
7 Interface syntax version 406
8 ! means M contains orphans
12 import Foo ; To compile M I used nothing from Foo, but it's
13 below me in the hierarchy
15 import Foo ! @ ; Ditto, but the ! means that Foo contains orphans
16 and the @ means that Foo is a boot interface
18 import Foo :: 3 ; To compile M I used everything from Foo, which has
21 import Foo :: 3 2 6 a 1 b 3 c 7 ; To compile M I used Foo. It had
25 and some specific things besides.
31 module ParseIface ( parseIface, parseType, parseRules, parseIdInfo ) where
33 #include "HsVersions.h"
35 import HsSyn -- quite a bit of stuff
36 import RdrHsSyn -- oodles of synonyms
37 import HsTypes ( mkHsForAllTy, mkHsTupCon )
39 import Literal ( Literal(..), mkMachInt, mkMachInt64, mkMachWord, mkMachWord64 )
40 import BasicTypes ( Fixity(..), FixityDirection(..), StrictnessMark(..),
41 NewOrData(..), Version, initialVersion, Boxity(..),
42 Activation(..), IPName(..)
44 import CostCentre ( CostCentre(..), IsCafCC(..), IsDupdCC(..) )
45 import Type ( Kind, mkArrowKind, liftedTypeKind, openTypeKind, usageTypeKind )
46 import ForeignCall ( ForeignCall(..), CCallConv(..), CCallSpec(..), CCallTarget(..) )
49 import RnMonad ( ParsedIface(..), ExportItem, IfaceDeprecs )
50 import HscTypes ( WhetherHasOrphans, IsBootInterface, GenAvailInfo(..),
51 ImportVersion, WhatsImported(..),
54 import RdrName ( RdrName, mkRdrUnqual, mkIfaceOrig )
55 import Name ( OccName )
56 import OccName ( mkSysOccFS,
57 tcName, varName, dataName, clsName, tvName,
60 import Module ( ModuleName, PackageName, mkSysModuleNameFS )
61 import SrcLoc ( SrcLoc )
62 import CmdLineOpts ( opt_InPackage, opt_IgnoreIfacePragmas )
64 import Class ( DefMeth (..) )
67 import FastString ( tailFS )
70 %name parseIface iface
72 %name parseIdInfo id_info
73 %name parseRules rules_and_deprecs
76 %monad { P }{ thenP }{ returnP }
77 %lexer { lexer } { ITeof }
81 'case' { ITcase } -- Haskell keywords
84 'default' { ITdefault }
85 'deriving' { ITderiving }
95 'instance' { ITinstance }
98 'newtype' { ITnewtype }
100 'qualified' { ITqualified }
105 'forall' { ITforall } -- GHC extension keywords
106 'foreign' { ITforeign }
107 'export' { ITexport }
109 'dynamic' { ITdynamic }
110 'unsafe' { ITunsafe }
112 'stdcall' { ITstdcallconv }
113 'ccall' { ITccallconv }
115 '__interface' { ITinterface } -- interface keywords
116 '__export' { IT__export }
117 '__depends' { ITdepends }
118 '__forall' { IT__forall }
119 '__letrec' { ITletrec }
120 '__coerce' { ITcoerce }
121 '__inline_me' { ITinlineMe }
122 '__inline_call'{ ITinlineCall }
123 '__DEFAULT' { ITdefaultbranch }
125 '__integer' { ITinteger_lit }
126 '__float' { ITfloat_lit }
127 '__word' { ITword_lit }
128 '__int64' { ITint64_lit }
129 '__word64' { ITword64_lit }
130 '__rational' { ITrational_lit }
131 '__addr' { ITaddr_lit }
132 '__label' { ITlabel_lit }
133 '__litlit' { ITlit_lit }
134 '__string' { ITstring_lit }
135 '__ccall' { ITccall $$ }
137 '__sccC' { ITsccAllCafs }
142 '__P' { ITspecialise }
145 '__S' { ITstrict $$ }
148 '__D' { ITdeprecated }
150 '..' { ITdotdot } -- reserved symbols
163 '{' { ITocurly } -- special symbols
165 '{|' { ITocurlybar } -- special symbols
166 '|}' { ITccurlybar } -- special symbols
177 VARID { ITvarid $$ } -- identifiers
179 VARSYM { ITvarsym $$ }
180 CONSYM { ITconsym $$ }
181 QVARID { ITqvarid $$ }
182 QCONID { ITqconid $$ }
183 QVARSYM { ITqvarsym $$ }
184 QCONSYM { ITqconsym $$ }
186 IPDUPVARID { ITdupipvarid $$ } -- GHC extension
187 IPSPLITVARID { ITsplitipvarid $$ } -- GHC extension
189 PRAGMA { ITpragma $$ }
192 STRING { ITstring $$ }
193 INTEGER { ITinteger $$ }
194 RATIONAL { ITrational $$ }
195 CLITLIT { ITlitlit $$ }
197 UNKNOWN { ITunknown $$ }
200 iface :: { ParsedIface }
201 iface : '__interface' package mod_name
203 orphans checkVersion 'where'
209 rules_and_deprecs_part
210 { let (rules,deprecs) = $14 () in
212 pi_mod = $3, -- Module name
213 pi_pkg = $2, -- Package name
214 pi_vers = $4, -- Module version
216 pi_exports = (fst $5, $9), -- Exports
217 pi_usages = $10, -- Usages
218 pi_fixity = $11, -- Fixies
219 pi_insts = $12, -- Local instances
220 pi_decls = $13, -- Decls
221 pi_rules = (snd $5,rules), -- Rules
222 pi_deprecs = deprecs -- Deprecations
225 -- Versions for exports and rules (optional)
226 sub_versions :: { (Version,Version) }
227 : '[' version version ']' { ($2,$3) }
228 | {- empty -} { (initialVersion, initialVersion) }
230 --------------------------------------------------------------------------
232 import_part :: { [ImportVersion OccName] }
234 | import_decl import_part { $1 : $2 }
236 import_decl :: { ImportVersion OccName }
237 import_decl : 'import' mod_name orphans is_boot whats_imported ';'
238 { ({-mkSysModuleNameFS-} $2, $3, $4, $5) }
240 orphans :: { WhetherHasOrphans }
244 is_boot :: { IsBootInterface }
248 whats_imported :: { WhatsImported OccName }
249 whats_imported : { NothingAtAll }
250 | '::' version { Everything $2 }
251 | '::' version version version name_version_pairs { Specifically $2 (Just $3) $5 $4 }
252 | '::' version version name_version_pairs { Specifically $2 Nothing $4 $3 }
254 name_version_pairs :: { [(OccName, Version)] }
255 name_version_pairs : { [] }
256 | name_version_pair name_version_pairs { $1 : $2 }
258 name_version_pair :: { (OccName, Version) }
259 name_version_pair : var_occ version { ($1, $2) }
260 | tc_occ version { ($1, $2) }
263 --------------------------------------------------------------------------
265 exports_part :: { [ExportItem] }
266 exports_part : { [] }
267 | '__export' mod_name entities ';'
268 exports_part { ({-mkSysModuleNameFS-} $2, $3) : $5 }
270 entities :: { [RdrAvailInfo] }
272 | entity entities { $1 : $2 }
274 entity :: { RdrAvailInfo }
275 entity : var_occ { Avail $1 }
276 | tc_occ { AvailTC $1 [$1] }
277 | tc_occ '|' stuff_inside { AvailTC $1 $3 }
278 | tc_occ stuff_inside { AvailTC $1 ($1:$2) }
279 -- Note that the "main name" comes at the beginning
281 stuff_inside :: { [OccName] }
282 stuff_inside : '{' val_occs '}' { $2 }
284 val_occ :: { OccName }
288 val_occs :: { [OccName] }
290 | val_occ val_occs { $1 : $2 }
293 --------------------------------------------------------------------------
295 fix_decl_part :: { [RdrNameFixitySig] }
296 fix_decl_part : {- empty -} { [] }
297 | fix_decls ';' { $1 }
299 fix_decls :: { [RdrNameFixitySig] }
301 | fix_decl fix_decls { $1 : $2 }
303 fix_decl :: { RdrNameFixitySig }
304 fix_decl : src_loc fixity prec var_or_data_name { FixitySig $4 (Fixity $3 $2) $1 }
306 fixity :: { FixityDirection }
307 fixity : 'infixl' { InfixL }
308 | 'infixr' { InfixR }
312 prec : INTEGER { fromInteger $1 }
314 -----------------------------------------------------------------------------
316 csigs :: { [RdrNameSig] }
318 | 'where' '{' csigs1 '}' { $3 }
320 csigs1 :: { [RdrNameSig] }
322 | csig ';' csigs1 { $1 : $3 }
324 csig :: { RdrNameSig }
325 csig : src_loc qvar_name '::' type { ClassOpSig $2 NoDefMeth $4 $1 }
326 | src_loc qvar_name ';' '::' type { ClassOpSig $2 GenDefMeth $5 $1 }
327 | src_loc qvar_name '=' '::' type { mkClassOpSigDM $2 $5 $1 }
329 --------------------------------------------------------------------------
331 instance_decl_part :: { [RdrNameInstDecl] }
332 instance_decl_part : {- empty -} { [] }
333 | instance_decl_part inst_decl { $2 : $1 }
335 inst_decl :: { RdrNameInstDecl }
336 inst_decl : src_loc 'instance' type '=' qvar_name ';'
338 EmptyMonoBinds {- No bindings -}
339 [] {- No user pragmas -}
340 (Just $5) {- Dfun id -}
344 --------------------------------------------------------------------------
346 decls_part :: { [(Version, RdrNameTyClDecl)] }
349 | opt_version decl ';' decls_part { ($1,$2):$4 }
351 decl :: { RdrNameTyClDecl }
352 decl : src_loc qvar_name '::' type maybe_idinfo
353 { IfaceSig $2 $4 ($5 $2) $1 }
354 | src_loc 'type' qtc_name tv_bndrs '=' type
355 { TySynonym $3 $4 $6 $1 }
356 | src_loc 'foreign' 'type' qtc_name
357 { ForeignType $4 Nothing DNType $1 }
358 | src_loc 'data' opt_decl_context qtc_name tv_bndrs constrs
359 { mkTyData DataType $3 $4 $5 $6 (length $6) Nothing $1 }
360 | src_loc 'newtype' opt_decl_context qtc_name tv_bndrs newtype_constr
361 { mkTyData NewType $3 $4 $5 $6 1 Nothing $1 }
362 | src_loc 'class' opt_decl_context qtc_name tv_bndrs fds csigs
363 { mkClassDecl $3 $4 $5 $6 $7 Nothing $1 }
365 maybe_idinfo :: { RdrName -> [HsIdInfo RdrName] }
366 maybe_idinfo : {- empty -} { \_ -> [] }
367 | pragma { \x -> if opt_IgnoreIfacePragmas then []
369 Just (POk _ id_info) -> id_info
370 Just (PFailed err) -> pprPanic "IdInfo parse failed"
374 If a signature decl is being loaded, and opt_IgnoreIfacePragmas is on,
375 we toss away unfolding information.
377 Also, if the signature is loaded from a module we're importing from source,
378 we do the same. This is to avoid situations when compiling a pair of mutually
379 recursive modules, peering at unfolding info in the interface file of the other,
380 e.g., you compile A, it looks at B's interface file and may as a result change
381 its interface file. Hence, B is recompiled, maybe changing its interface file,
382 which will the unfolding info used in A to become invalid. Simple way out is to
383 just ignore unfolding info.
385 [Jan 99: I junked the second test above. If we're importing from an hi-boot
386 file there isn't going to *be* any pragma info. The above comment
387 dates from a time where we picked up a .hi file first if it existed.]
390 pragma :: { Maybe (ParseResult [HsIdInfo RdrName]) }
391 pragma : src_loc PRAGMA { Just (parseIdInfo $2 PState{ bol = 0#, atbol = 1#,
397 -----------------------------------------------------------------------------
399 -- This production is lifted so that it doesn't get eagerly parsed when we
400 -- use happy --strict.
401 rules_and_deprecs_part :: { () -> ([RdrNameRuleDecl], IfaceDeprecs) }
402 rules_and_deprecs_part
403 : {- empty -} { \_ -> ([], Nothing) }
404 | src_loc PRAGMA { \_ -> case parseRules $2 PState{ bol = 0#, atbol = 1#,
409 PFailed err -> pprPanic "Rules/Deprecations parse failed" err
412 rules_and_deprecs :: { ([RdrNameRuleDecl], IfaceDeprecs) }
413 rules_and_deprecs : rule_prag deprec_prag { ($1, $2) }
416 -----------------------------------------------------------------------------
418 rule_prag :: { [RdrNameRuleDecl] }
419 rule_prag : {- empty -} { [] }
422 rules :: { [RdrNameRuleDecl] }
424 | rule ';' rules { $1:$3 }
426 rule :: { RdrNameRuleDecl }
427 rule : src_loc STRING activation rule_forall qvar_name
428 core_args '=' core_expr { IfaceRule $2 $3 $4 $5 $6 $8 $1 }
430 activation :: { Activation }
431 activation : {- empty -} { AlwaysActive }
432 | '[' INTEGER ']' { ActiveAfter (fromInteger $2) }
433 | '[' '~' INTEGER ']' { ActiveBefore (fromInteger $3) }
435 rule_forall :: { [UfBinder RdrName] }
436 rule_forall : '__forall' '{' core_bndrs '}' { $3 }
438 -----------------------------------------------------------------------------
440 deprec_prag :: { IfaceDeprecs }
441 deprec_prag : {- empty -} { Nothing }
442 | '__D' deprecs { Just $2 }
444 deprecs :: { Either DeprecTxt [(RdrName,DeprecTxt)] }
445 deprecs : STRING { Left $1 }
446 | deprec_list { Right $1 }
448 deprec_list :: { [(RdrName,DeprecTxt)] }
449 deprec_list : deprec { [$1] }
450 | deprec ';' deprec_list { $1 : $3 }
452 deprec :: { (RdrName,DeprecTxt) }
453 deprec : deprec_name STRING { ($1, $2) }
455 deprec_name :: { RdrName }
459 -----------------------------------------------------------------------------
461 version :: { Version }
462 version : INTEGER { fromInteger $1 }
464 opt_version :: { Version }
465 opt_version : version { $1 }
466 | {- empty -} { initialVersion }
468 opt_decl_context :: { RdrNameContext }
469 opt_decl_context : { [] }
470 | context '=>' { $1 }
472 ----------------------------------------------------------------------------
474 constrs :: { [RdrNameConDecl] {- empty for handwritten abstract -} }
476 | '=' constrs1 { $2 }
478 constrs1 :: { [RdrNameConDecl] }
479 constrs1 : constr { [$1] }
480 | constr '|' constrs1 { $1 : $3 }
482 constr :: { RdrNameConDecl }
483 constr : src_loc ex_stuff qdata_name batypes { mk_con_decl $3 $2 (VanillaCon $4) $1 }
484 | src_loc ex_stuff qdata_name '{' fields1 '}' { mk_con_decl $3 $2 (RecCon $5) $1 }
485 -- We use "data_fs" so as to include ()
487 newtype_constr :: { [RdrNameConDecl] {- Not allowed to be empty -} }
488 newtype_constr : src_loc '=' ex_stuff qdata_name atype { [mk_con_decl $4 $3 (VanillaCon [unbangedType $5]) $1] }
489 | src_loc '=' ex_stuff qdata_name '{' qvar_name '::' atype '}'
490 { [mk_con_decl $4 $3 (RecCon [([$6], unbangedType $8)]) $1] }
492 ex_stuff :: { ([HsTyVarBndr RdrName], RdrNameContext) }
493 ex_stuff : { ([],[]) }
494 | '__forall' tv_bndrs opt_context '=>' { ($2,$3) }
496 batypes :: { [RdrNameBangType] }
498 | batype batypes { $1 : $2 }
500 batype :: { RdrNameBangType }
501 batype : tatype { unbangedType $1 }
502 | '!' tatype { BangType MarkedStrict $2 }
503 | '!' '!' tatype { BangType MarkedUnboxed $3 }
505 fields1 :: { [([RdrName], RdrNameBangType)] }
506 fields1 : field { [$1] }
507 | field ',' fields1 { $1 : $3 }
509 field :: { ([RdrName], RdrNameBangType) }
510 field : qvar_names1 '::' ttype { ($1, unbangedType $3) }
511 | qvar_names1 '::' '!' ttype { ($1, BangType MarkedStrict $4) }
512 | qvar_names1 '::' '!' '!' ttype { ($1, BangType MarkedUnboxed $5) }
514 --------------------------------------------------------------------------
516 type :: { RdrNameHsType }
517 type : '__forall' tv_bndrs
518 opt_context '=>' type { mkHsForAllTy (Just $2) $3 $5 }
519 | btype '->' type { HsFunTy $1 $3 }
522 opt_context :: { RdrNameContext }
526 context :: { RdrNameContext }
527 context : '(' context_list1 ')' { $2 }
528 | '{' context_list1 '}' { $2 } -- Backward compatibility
530 context_list1 :: { RdrNameContext }
531 context_list1 : class { [$1] }
532 | class ',' context_list1 { $1 : $3 }
534 class :: { HsPred RdrName }
535 class : qcls_name atypes { (HsClassP $1 $2) }
536 | ipvar_name '::' type { (HsIParam $1 $3) }
538 types0 :: { [RdrNameHsType] {- Zero or more -} }
539 types0 : {- empty -} { [ ] }
543 types2 :: { [RdrNameHsType] {- Two or more -} }
544 types2 : type ',' type { [$1,$3] }
545 | type ',' types2 { $1 : $3 }
547 btype :: { RdrNameHsType }
549 | btype atype { HsAppTy $1 $2 }
551 atype :: { RdrNameHsType }
552 atype : qtc_name { HsTyVar $1 }
553 | tv_name { HsTyVar $1 }
556 | '(' ')' { HsTupleTy (mkHsTupCon tcName Boxed []) [] }
557 | '(' types2 ')' { HsTupleTy (mkHsTupCon tcName Boxed $2) $2 }
558 | '(#' types0 '#)' { HsTupleTy (mkHsTupCon tcName Unboxed $2) $2 }
559 | '[' type ']' { HsListTy $2 }
560 | '{' qcls_name atypes '}' { mkHsDictTy $2 $3 }
561 | '{' ipvar_name '::' type '}' { mkHsIParamTy $2 $4 }
562 | '(' type ')' { $2 }
564 atypes :: { [RdrNameHsType] {- Zero or more -} }
566 | atype atypes { $1 : $2 }
567 --------------------------------------------------------------------------
569 -- versions of type/btype/atype that cant begin with '!' (or '.')
570 -- for use where the kind is definitely known NOT to be '$'
572 ttype :: { RdrNameHsType }
573 ttype : '__forall' tv_bndrs
574 opt_context '=>' type { mkHsForAllTy (Just $2) $3 $5 }
575 | tbtype '->' type { HsFunTy $1 $3 }
578 tbtype :: { RdrNameHsType }
579 tbtype : tatype { $1 }
580 | tbtype atype { HsAppTy $1 $2 }
582 tatype :: { RdrNameHsType }
583 tatype : qtc_name { HsTyVar $1 }
584 | tv_name { HsTyVar $1 }
585 | '(' ')' { HsTupleTy (mkHsTupCon tcName Boxed []) [] }
586 | '(' types2 ')' { HsTupleTy (mkHsTupCon tcName Boxed $2) $2 }
587 | '(#' types0 '#)' { HsTupleTy (mkHsTupCon tcName Unboxed $2) $2 }
588 | '[' type ']' { HsListTy $2 }
589 | '{' qcls_name atypes '}' { mkHsDictTy $2 $3 }
590 | '{' ipvar_name '::' type '}' { mkHsIParamTy $2 $4 }
591 | '(' type ')' { $2 }
592 ---------------------------------------------------------------------
594 package :: { PackageName }
596 | {- empty -} { opt_InPackage }
597 -- Useful for .hi-boot files,
598 -- which can omit the package Id
599 -- Module loops are always within a package
601 mod_name :: { ModuleName }
602 : CONID { mkSysModuleNameFS $1 }
605 ---------------------------------------------------
606 var_fs :: { EncodedFS }
608 | 'as' { SLIT("as") }
609 | 'qualified' { SLIT("qualified") }
610 | 'hiding' { SLIT("hiding") }
611 | 'forall' { SLIT("forall") }
612 | 'foreign' { SLIT("foreign") }
613 | 'export' { SLIT("export") }
614 | 'label' { SLIT("label") }
615 | 'dynamic' { SLIT("dynamic") }
616 | 'unsafe' { SLIT("unsafe") }
617 | 'with' { SLIT("with") }
618 | 'ccall' { SLIT("ccall") }
619 | 'stdcall' { SLIT("stdcall") }
621 var_occ :: { OccName }
622 : var_fs { mkSysOccFS varName $1 }
624 var_name :: { RdrName }
625 var_name : var_occ { mkRdrUnqual $1 }
627 qvar_name :: { RdrName }
628 qvar_name : var_name { $1 }
629 | QVARID { mkIfaceOrig varName $1 }
631 ipvar_name :: { IPName RdrName }
632 : IPDUPVARID { Dupable (mkRdrUnqual (mkSysOccFS varName $1)) }
633 | IPSPLITVARID { Linear (mkRdrUnqual (mkSysOccFS varName $1)) }
635 qvar_names1 :: { [RdrName] }
636 qvar_names1 : qvar_name { [$1] }
637 | qvar_name qvar_names1 { $1 : $2 }
639 var_names :: { [RdrName] }
641 | var_name var_names { $1 : $2 }
643 var_names1 :: { [RdrName] }
644 var_names1 : var_name var_names { $1 : $2 }
646 ---------------------------------------------------
648 data_occ :: { OccName }
649 : CONID { mkSysOccFS dataName $1 }
651 qdata_name :: { RdrName }
652 : data_occ { mkRdrUnqual $1 }
653 | QCONID { mkIfaceOrig dataName $1 }
655 var_or_data_name :: { RdrName }
659 ---------------------------------------------------
660 tc_occ :: { OccName }
661 : CONID { mkSysOccFS tcName $1 }
663 qtc_name :: { RdrName }
664 : tc_occ { mkRdrUnqual $1 }
665 | QCONID { mkIfaceOrig tcName $1 }
667 ---------------------------------------------------
668 qcls_name :: { RdrName }
669 : CONID { mkRdrUnqual (mkSysOccFS clsName $1) }
670 | QCONID { mkIfaceOrig clsName $1 }
672 ---------------------------------------------------
673 tv_name :: { RdrName }
674 : var_fs { mkRdrUnqual (mkSysOccFS tvName $1) }
676 tv_bndr :: { HsTyVarBndr RdrName }
677 : tv_name '::' akind { IfaceTyVar $1 $3 }
678 | tv_name { IfaceTyVar $1 liftedTypeKind }
680 tv_bndrs :: { [HsTyVarBndr RdrName] }
682 | '[' tv_bndrs1 ']' { $2 } -- Backward compatibility
684 tv_bndrs1 :: { [HsTyVarBndr RdrName] }
686 | tv_bndr tv_bndrs1 { $1 : $2 }
688 ---------------------------------------------------
689 fds :: { [([RdrName], [RdrName])] }
691 | '|' fds1 { reverse $2 }
693 fds1 :: { [([RdrName], [RdrName])] }
694 : fds1 ',' fd { $3 : $1 }
697 fd :: { ([RdrName], [RdrName]) }
698 : varids0 '->' varids0 { (reverse $1, reverse $3) }
700 varids0 :: { [RdrName] }
702 | varids0 tv_name { $2 : $1 }
704 ---------------------------------------------------
707 | akind '->' kind { mkArrowKind $1 $3 }
710 : VARSYM { if $1 == SLIT("*") then
712 else if $1 == SLIT("?") then
714 else if $1 == SLIT("\36") then
715 usageTypeKind -- dollar
716 else panic "ParseInterface: akind"
718 | '(' kind ')' { $2 }
720 --------------------------------------------------------------------------
722 id_info :: { [HsIdInfo RdrName] }
723 : id_info_item { [$1] }
724 | id_info_item id_info { $1 : $2 }
726 id_info_item :: { HsIdInfo RdrName }
727 : '__A' INTEGER { HsArity (fromInteger $2) }
728 | '__U' activation core_expr { HsUnfold $2 $3 }
729 | '__S' { HsStrictness $1 }
730 | '__C' { HsNoCafRefs }
731 | '__P' qvar_name INTEGER { HsWorker $2 (fromInteger $3) }
733 -------------------------------------------------------
734 core_expr :: { UfExpr RdrName }
735 core_expr : '\\' core_bndrs '->' core_expr { foldr UfLam $4 $2 }
736 | 'case' core_expr 'of' var_name
737 '{' core_alts '}' { UfCase $2 $4 $6 }
739 | 'let' '{' core_val_bndr '=' core_expr
740 '}' 'in' core_expr { UfLet (UfNonRec $3 $5) $8 }
741 | '__letrec' '{' rec_binds '}'
742 'in' core_expr { UfLet (UfRec $3) $6 }
744 | '__litlit' STRING atype { UfLitLit $2 $3 }
748 fexpr :: { UfExpr RdrName }
749 fexpr : fexpr core_arg { UfApp $1 $2 }
750 | scc core_aexpr { UfNote (UfSCC $1) $2 }
751 | '__inline_me' core_aexpr { UfNote UfInlineMe $2 }
752 | '__inline_call' core_aexpr { UfNote UfInlineCall $2 }
753 | '__coerce' atype core_aexpr { UfNote (UfCoerce $2) $3 }
756 core_arg :: { UfExpr RdrName }
757 : '@' atype { UfType $2 }
760 core_args :: { [UfExpr RdrName] }
762 | core_arg core_args { $1 : $2 }
764 core_aexpr :: { UfExpr RdrName } -- Atomic expressions
765 core_aexpr : qvar_name { UfVar $1 }
766 | qdata_name { UfVar $1 }
768 | core_lit { UfLit $1 }
769 | '(' core_expr ')' { $2 }
771 | '(' ')' { UfTuple (mkHsTupCon dataName Boxed []) [] }
772 | '(' comma_exprs2 ')' { UfTuple (mkHsTupCon dataName Boxed $2) $2 }
773 | '(#' comma_exprs0 '#)' { UfTuple (mkHsTupCon dataName Unboxed $2) $2 }
775 | '{' '__ccall' ccall_string type '}'
777 (is_dyn, is_casm, may_gc) = $2
779 target | is_dyn = DynamicTarget
780 | is_casm = CasmTarget $3
781 | otherwise = StaticTarget $3
783 ccall = CCallSpec target CCallConv may_gc
785 UfFCall (CCall ccall) $4
789 comma_exprs0 :: { [UfExpr RdrName] } -- Zero or more
790 comma_exprs0 : {- empty -} { [ ] }
791 | core_expr { [ $1 ] }
792 | comma_exprs2 { $1 }
794 comma_exprs2 :: { [UfExpr RdrName] } -- Two or more
795 comma_exprs2 : core_expr ',' core_expr { [$1,$3] }
796 | core_expr ',' comma_exprs2 { $1 : $3 }
798 rec_binds :: { [(UfBinder RdrName, UfExpr RdrName)] }
800 | core_val_bndr '=' core_expr ';' rec_binds { ($1,$3) : $5 }
802 core_alts :: { [UfAlt RdrName] }
804 | core_alt ';' core_alts { $1 : $3 }
806 core_alt :: { UfAlt RdrName }
807 core_alt : core_pat '->' core_expr { (fst $1, snd $1, $3) }
809 core_pat :: { (UfConAlt RdrName, [RdrName]) }
810 core_pat : core_lit { (UfLitAlt $1, []) }
811 | '__litlit' STRING atype { (UfLitLitAlt $2 $3, []) }
812 | qdata_name core_pat_names { (UfDataAlt $1, $2) }
813 | '(' ')' { (UfTupleAlt (mkHsTupCon dataName Boxed []), []) }
814 | '(' comma_var_names1 ')' { (UfTupleAlt (mkHsTupCon dataName Boxed $2), $2) }
815 | '(#' comma_var_names1 '#)' { (UfTupleAlt (mkHsTupCon dataName Unboxed $2), $2) }
816 | '__DEFAULT' { (UfDefault, []) }
817 | '(' core_pat ')' { $2 }
819 core_pat_names :: { [RdrName] }
820 core_pat_names : { [] }
821 | core_pat_name core_pat_names { $1 : $2 }
823 -- Tyvar names and variable names live in different name spaces
824 -- so they need to be signalled separately. But we don't record
825 -- types or kinds in a pattern; we work that out from the type
826 -- of the case scrutinee
827 core_pat_name :: { RdrName }
828 core_pat_name : var_name { $1 }
831 comma_var_names1 :: { [RdrName] } -- One or more
832 comma_var_names1 : var_name { [$1] }
833 | var_name ',' comma_var_names1 { $1 : $3 }
835 core_lit :: { Literal }
836 core_lit : integer { mkMachInt $1 }
837 | CHAR { MachChar $1 }
838 | STRING { MachStr $1 }
839 | rational { MachDouble $1 }
840 | '__word' integer { mkMachWord $2 }
841 | '__word64' integer { mkMachWord64 $2 }
842 | '__int64' integer { mkMachInt64 $2 }
843 | '__float' rational { MachFloat $2 }
844 | '__addr' integer { MachAddr $2 }
845 | '__label' STRING { MachLabel $2 }
847 integer :: { Integer }
849 | '-' INTEGER { (-$2) }
851 rational :: { Rational }
853 | '-' RATIONAL { (-$2) }
855 core_bndr :: { UfBinder RdrName }
856 core_bndr : core_val_bndr { $1 }
857 | core_tv_bndr { $1 }
859 core_bndrs :: { [UfBinder RdrName] }
861 | core_bndr core_bndrs { $1 : $2 }
863 core_val_bndr :: { UfBinder RdrName }
864 core_val_bndr : var_name '::' atype { UfValBinder $1 $3 }
866 core_tv_bndr :: { UfBinder RdrName }
867 core_tv_bndr : '@' tv_name '::' akind { UfTyBinder $2 $4 }
868 | '@' tv_name { UfTyBinder $2 liftedTypeKind }
870 ccall_string :: { FAST_STRING }
876 ------------------------------------------------------------------------
877 scc :: { CostCentre }
878 : '__sccC' '{' mod_name '}' { AllCafsCC $3 }
879 | '__scc' '{' cc_name mod_name cc_dup cc_caf '}'
880 { NormalCC { cc_name = $3, cc_mod = $4,
881 cc_is_dupd = $5, cc_is_caf = $6 } }
883 cc_name :: { EncodedFS }
887 cc_dup :: { IsDupdCC }
888 cc_dup : { OriginalCC }
891 cc_caf :: { IsCafCC }
895 -------------------------------------------------------------------
897 src_loc :: { SrcLoc }
898 src_loc : {% getSrcLocP }
900 -- Check the project version: this makes sure
901 -- that the project version (e.g. 407) in the interface
902 -- file is the same as that for the compiler that's reading it
903 checkVersion :: { () }
904 : {-empty-} {% checkVersion Nothing }
905 | INTEGER {% checkVersion (Just (fromInteger $1)) }
907 -------------------------------------------------------------------
912 happyError buf PState{ loc = loc } = PFailed (ifaceParseErr buf loc)
914 mk_con_decl name (ex_tvs, ex_ctxt) details loc = mkConDecl name ex_tvs ex_ctxt details loc