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, mkModule )
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
162 '{' { ITocurly } -- special symbols
164 '{|' { ITocurlybar } -- special symbols
165 '|}' { ITccurlybar } -- special symbols
176 VARID { ITvarid $$ } -- identifiers
178 VARSYM { ITvarsym $$ }
179 CONSYM { ITconsym $$ }
180 QVARID { ITqvarid $$ }
181 QCONID { ITqconid $$ }
182 QVARSYM { ITqvarsym $$ }
183 QCONSYM { ITqconsym $$ }
185 IPDUPVARID { ITdupipvarid $$ } -- GHC extension
186 IPSPLITVARID { ITsplitipvarid $$ } -- GHC extension
188 PRAGMA { ITpragma $$ }
191 STRING { ITstring $$ }
192 INTEGER { ITinteger $$ }
193 RATIONAL { ITrational $$ }
194 CLITLIT { ITlitlit $$ }
196 UNKNOWN { ITunknown $$ }
199 iface :: { ParsedIface }
200 iface : '__interface' package mod_name
202 orphans checkVersion 'where'
208 rules_and_deprecs_part
209 { let (rules,deprecs) = $14 () in
211 pi_mod = mkModule $3 $2, -- Module itself
212 pi_vers = $4, -- Module version
214 pi_exports = (fst $5, $9), -- Exports
215 pi_usages = $10, -- Usages
216 pi_fixity = $11, -- Fixies
217 pi_insts = $12, -- Local instances
218 pi_decls = $13, -- Decls
219 pi_rules = (snd $5,rules), -- Rules
220 pi_deprecs = deprecs -- Deprecations
223 -- Versions for exports and rules (optional)
224 sub_versions :: { (Version,Version) }
225 : '[' version version ']' { ($2,$3) }
226 | {- empty -} { (initialVersion, initialVersion) }
228 --------------------------------------------------------------------------
230 import_part :: { [ImportVersion OccName] }
232 | import_decl import_part { $1 : $2 }
234 import_decl :: { ImportVersion OccName }
235 import_decl : 'import' mod_name orphans is_boot whats_imported ';'
236 { ({-mkSysModuleNameFS-} $2, $3, $4, $5) }
238 orphans :: { WhetherHasOrphans }
242 is_boot :: { IsBootInterface }
246 whats_imported :: { WhatsImported OccName }
247 whats_imported : { NothingAtAll }
248 | '::' version { Everything $2 }
249 | '::' version version version name_version_pairs { Specifically $2 (Just $3) $5 $4 }
250 | '::' version version name_version_pairs { Specifically $2 Nothing $4 $3 }
252 name_version_pairs :: { [(OccName, Version)] }
253 name_version_pairs : { [] }
254 | name_version_pair name_version_pairs { $1 : $2 }
256 name_version_pair :: { (OccName, Version) }
257 name_version_pair : var_occ version { ($1, $2) }
258 | tc_occ version { ($1, $2) }
261 --------------------------------------------------------------------------
263 exports_part :: { [ExportItem] }
264 exports_part : { [] }
265 | '__export' mod_name entities ';'
266 exports_part { ({-mkSysModuleNameFS-} $2, $3) : $5 }
268 entities :: { [RdrAvailInfo] }
270 | entity entities { $1 : $2 }
272 entity :: { RdrAvailInfo }
273 entity : var_occ { Avail $1 }
274 | tc_occ { AvailTC $1 [$1] }
275 | tc_occ '|' stuff_inside { AvailTC $1 $3 }
276 | tc_occ stuff_inside { AvailTC $1 ($1:$2) }
277 -- Note that the "main name" comes at the beginning
279 stuff_inside :: { [OccName] }
280 stuff_inside : '{' val_occs '}' { $2 }
282 val_occ :: { OccName }
286 val_occs :: { [OccName] }
288 | val_occ val_occs { $1 : $2 }
291 --------------------------------------------------------------------------
293 fix_decl_part :: { [RdrNameFixitySig] }
294 fix_decl_part : {- empty -} { [] }
295 | fix_decls ';' { $1 }
297 fix_decls :: { [RdrNameFixitySig] }
299 | fix_decl fix_decls { $1 : $2 }
301 fix_decl :: { RdrNameFixitySig }
302 fix_decl : src_loc fixity prec var_or_data_name { FixitySig $4 (Fixity $3 $2) $1 }
304 fixity :: { FixityDirection }
305 fixity : 'infixl' { InfixL }
306 | 'infixr' { InfixR }
310 prec : INTEGER { fromInteger $1 }
312 -----------------------------------------------------------------------------
314 csigs :: { [RdrNameSig] }
316 | 'where' '{' csigs1 '}' { $3 }
318 csigs1 :: { [RdrNameSig] }
320 | csig ';' csigs1 { $1 : $3 }
322 csig :: { RdrNameSig }
323 csig : src_loc qvar_name '::' type { ClassOpSig $2 NoDefMeth $4 $1 }
324 | src_loc qvar_name ';' '::' type { ClassOpSig $2 GenDefMeth $5 $1 }
325 | src_loc qvar_name '=' '::' type { mkClassOpSigDM $2 $5 $1 }
327 --------------------------------------------------------------------------
329 instance_decl_part :: { [RdrNameInstDecl] }
330 instance_decl_part : {- empty -} { [] }
331 | instance_decl_part inst_decl { $2 : $1 }
333 inst_decl :: { RdrNameInstDecl }
334 inst_decl : src_loc 'instance' type '=' qvar_name ';'
336 EmptyMonoBinds {- No bindings -}
337 [] {- No user pragmas -}
338 (Just $5) {- Dfun id -}
342 --------------------------------------------------------------------------
344 decls_part :: { [(Version, RdrNameTyClDecl)] }
347 | opt_version decl ';' decls_part { ($1,$2):$4 }
349 decl :: { RdrNameTyClDecl }
350 decl : src_loc qvar_name '::' type maybe_idinfo
351 { IfaceSig $2 $4 ($5 $2) $1 }
352 | src_loc 'type' qtc_name tv_bndrs '=' type
353 { TySynonym $3 $4 $6 $1 }
354 | src_loc 'foreign' 'type' qtc_name
355 { ForeignType $4 Nothing DNType $1 }
356 | src_loc 'data' opt_decl_context qtc_name tv_bndrs constrs
357 { mkTyData DataType $3 $4 $5 $6 (length $6) Nothing $1 }
358 | src_loc 'newtype' opt_decl_context qtc_name tv_bndrs newtype_constr
359 { mkTyData NewType $3 $4 $5 $6 1 Nothing $1 }
360 | src_loc 'class' opt_decl_context qtc_name tv_bndrs fds csigs
361 { mkClassDecl $3 $4 $5 $6 $7 Nothing $1 }
363 maybe_idinfo :: { RdrName -> [HsIdInfo RdrName] }
364 maybe_idinfo : {- empty -} { \_ -> [] }
365 | pragma { \x -> if opt_IgnoreIfacePragmas then []
367 Just (POk _ id_info) -> id_info
368 Just (PFailed err) -> pprPanic "IdInfo parse failed"
372 If a signature decl is being loaded, and opt_IgnoreIfacePragmas is on,
373 we toss away unfolding information.
375 Also, if the signature is loaded from a module we're importing from source,
376 we do the same. This is to avoid situations when compiling a pair of mutually
377 recursive modules, peering at unfolding info in the interface file of the other,
378 e.g., you compile A, it looks at B's interface file and may as a result change
379 its interface file. Hence, B is recompiled, maybe changing its interface file,
380 which will the unfolding info used in A to become invalid. Simple way out is to
381 just ignore unfolding info.
383 [Jan 99: I junked the second test above. If we're importing from an hi-boot
384 file there isn't going to *be* any pragma info. The above comment
385 dates from a time where we picked up a .hi file first if it existed.]
388 pragma :: { Maybe (ParseResult [HsIdInfo RdrName]) }
389 pragma : src_loc PRAGMA { Just (parseIdInfo $2 PState{ bol = 0#, atbol = 1#,
395 -----------------------------------------------------------------------------
397 -- This production is lifted so that it doesn't get eagerly parsed when we
398 -- use happy --strict.
399 rules_and_deprecs_part :: { () -> ([RdrNameRuleDecl], IfaceDeprecs) }
400 rules_and_deprecs_part
401 : {- empty -} { \_ -> ([], Nothing) }
402 | src_loc PRAGMA { \_ -> case parseRules $2 PState{ bol = 0#, atbol = 1#,
407 PFailed err -> pprPanic "Rules/Deprecations parse failed" err
410 rules_and_deprecs :: { ([RdrNameRuleDecl], IfaceDeprecs) }
411 rules_and_deprecs : rule_prag deprec_prag { ($1, $2) }
414 -----------------------------------------------------------------------------
416 rule_prag :: { [RdrNameRuleDecl] }
417 rule_prag : {- empty -} { [] }
420 rules :: { [RdrNameRuleDecl] }
422 | rule ';' rules { $1:$3 }
424 rule :: { RdrNameRuleDecl }
425 rule : src_loc STRING activation rule_forall qvar_name
426 core_args '=' core_expr { IfaceRule $2 $3 $4 $5 $6 $8 $1 }
428 activation :: { Activation }
429 activation : {- empty -} { AlwaysActive }
430 | '[' INTEGER ']' { ActiveAfter (fromInteger $2) }
432 rule_forall :: { [UfBinder RdrName] }
433 rule_forall : '__forall' '{' core_bndrs '}' { $3 }
435 -----------------------------------------------------------------------------
437 deprec_prag :: { IfaceDeprecs }
438 deprec_prag : {- empty -} { Nothing }
439 | '__D' deprecs { Just $2 }
441 deprecs :: { Either DeprecTxt [(RdrName,DeprecTxt)] }
442 deprecs : STRING { Left $1 }
443 | deprec_list { Right $1 }
445 deprec_list :: { [(RdrName,DeprecTxt)] }
446 deprec_list : deprec { [$1] }
447 | deprec ';' deprec_list { $1 : $3 }
449 deprec :: { (RdrName,DeprecTxt) }
450 deprec : deprec_name STRING { ($1, $2) }
452 deprec_name :: { RdrName }
456 -----------------------------------------------------------------------------
458 version :: { Version }
459 version : INTEGER { fromInteger $1 }
461 opt_version :: { Version }
462 opt_version : version { $1 }
463 | {- empty -} { initialVersion }
465 opt_decl_context :: { RdrNameContext }
466 opt_decl_context : { [] }
467 | context '=>' { $1 }
469 ----------------------------------------------------------------------------
471 constrs :: { [RdrNameConDecl] {- empty for handwritten abstract -} }
473 | '=' constrs1 { $2 }
475 constrs1 :: { [RdrNameConDecl] }
476 constrs1 : constr { [$1] }
477 | constr '|' constrs1 { $1 : $3 }
479 constr :: { RdrNameConDecl }
480 constr : src_loc ex_stuff qdata_name batypes { mk_con_decl $3 $2 (VanillaCon $4) $1 }
481 | src_loc ex_stuff qdata_name '{' fields1 '}' { mk_con_decl $3 $2 (RecCon $5) $1 }
482 -- We use "data_fs" so as to include ()
484 newtype_constr :: { [RdrNameConDecl] {- Not allowed to be empty -} }
485 newtype_constr : src_loc '=' ex_stuff qdata_name atype { [mk_con_decl $4 $3 (VanillaCon [unbangedType $5]) $1] }
486 | src_loc '=' ex_stuff qdata_name '{' qvar_name '::' atype '}'
487 { [mk_con_decl $4 $3 (RecCon [([$6], unbangedType $8)]) $1] }
489 ex_stuff :: { ([HsTyVarBndr RdrName], RdrNameContext) }
490 ex_stuff : { ([],[]) }
491 | '__forall' tv_bndrs opt_context '=>' { ($2,$3) }
493 batypes :: { [RdrNameBangType] }
495 | batype batypes { $1 : $2 }
497 batype :: { RdrNameBangType }
498 batype : tatype { unbangedType $1 }
499 | '!' tatype { BangType MarkedStrict $2 }
500 | '!' '!' tatype { BangType MarkedUnboxed $3 }
502 fields1 :: { [([RdrName], RdrNameBangType)] }
503 fields1 : field { [$1] }
504 | field ',' fields1 { $1 : $3 }
506 field :: { ([RdrName], RdrNameBangType) }
507 field : qvar_names1 '::' ttype { ($1, unbangedType $3) }
508 | qvar_names1 '::' '!' ttype { ($1, BangType MarkedStrict $4) }
509 | qvar_names1 '::' '!' '!' ttype { ($1, BangType MarkedUnboxed $5) }
511 --------------------------------------------------------------------------
513 type :: { RdrNameHsType }
514 type : '__forall' tv_bndrs
515 opt_context '=>' type { mkHsForAllTy (Just $2) $3 $5 }
516 | btype '->' type { HsFunTy $1 $3 }
519 opt_context :: { RdrNameContext }
523 context :: { RdrNameContext }
524 context : '(' context_list1 ')' { $2 }
525 | '{' context_list1 '}' { $2 } -- Backward compatibility
527 context_list1 :: { RdrNameContext }
528 context_list1 : class { [$1] }
529 | class ',' context_list1 { $1 : $3 }
531 class :: { HsPred RdrName }
532 class : qcls_name atypes { (HsClassP $1 $2) }
533 | ipvar_name '::' type { (HsIParam $1 $3) }
535 types0 :: { [RdrNameHsType] {- Zero or more -} }
536 types0 : {- empty -} { [ ] }
540 types2 :: { [RdrNameHsType] {- Two or more -} }
541 types2 : type ',' type { [$1,$3] }
542 | type ',' types2 { $1 : $3 }
544 btype :: { RdrNameHsType }
546 | btype atype { HsAppTy $1 $2 }
547 | '__u' atype atype { HsUsageTy $2 $3 }
549 atype :: { RdrNameHsType }
550 atype : qtc_name { HsTyVar $1 }
551 | tv_name { HsTyVar $1 }
554 | '(' ')' { HsTupleTy (mkHsTupCon tcName Boxed []) [] }
555 | '(' types2 ')' { HsTupleTy (mkHsTupCon tcName Boxed $2) $2 }
556 | '(#' types0 '#)' { HsTupleTy (mkHsTupCon tcName Unboxed $2) $2 }
557 | '[' type ']' { HsListTy $2 }
558 | '{' qcls_name atypes '}' { mkHsDictTy $2 $3 }
559 | '{' ipvar_name '::' type '}' { mkHsIParamTy $2 $4 }
560 | '(' type ')' { $2 }
562 atypes :: { [RdrNameHsType] {- Zero or more -} }
564 | atype atypes { $1 : $2 }
565 --------------------------------------------------------------------------
567 -- versions of type/btype/atype that cant begin with '!' (or '.')
568 -- for use where the kind is definitely known NOT to be '$'
570 ttype :: { RdrNameHsType }
571 ttype : '__forall' tv_bndrs
572 opt_context '=>' type { mkHsForAllTy (Just $2) $3 $5 }
573 | tbtype '->' type { HsFunTy $1 $3 }
576 tbtype :: { RdrNameHsType }
577 tbtype : tatype { $1 }
578 | tbtype atype { HsAppTy $1 $2 }
579 | '__u' atype atype { HsUsageTy $2 $3 }
581 tatype :: { RdrNameHsType }
582 tatype : qtc_name { HsTyVar $1 }
583 | tv_name { HsTyVar $1 }
584 | '(' ')' { HsTupleTy (mkHsTupCon tcName Boxed []) [] }
585 | '(' types2 ')' { HsTupleTy (mkHsTupCon tcName Boxed $2) $2 }
586 | '(#' types0 '#)' { HsTupleTy (mkHsTupCon tcName Unboxed $2) $2 }
587 | '[' type ']' { HsListTy $2 }
588 | '{' qcls_name atypes '}' { mkHsDictTy $2 $3 }
589 | '{' ipvar_name '::' type '}' { mkHsIParamTy $2 $4 }
590 | '(' type ')' { $2 }
591 ---------------------------------------------------------------------
593 package :: { PackageName }
595 | {- empty -} { opt_InPackage }
596 -- Useful for .hi-boot files,
597 -- which can omit the package Id
598 -- Module loops are always within a package
600 mod_name :: { ModuleName }
601 : CONID { mkSysModuleNameFS $1 }
604 ---------------------------------------------------
605 var_fs :: { EncodedFS }
607 | 'as' { SLIT("as") }
608 | 'qualified' { SLIT("qualified") }
609 | 'hiding' { SLIT("hiding") }
610 | 'forall' { SLIT("forall") }
611 | 'foreign' { SLIT("foreign") }
612 | 'export' { SLIT("export") }
613 | 'label' { SLIT("label") }
614 | 'dynamic' { SLIT("dynamic") }
615 | 'unsafe' { SLIT("unsafe") }
616 | 'with' { SLIT("with") }
617 | 'ccall' { SLIT("ccall") }
618 | 'stdcall' { SLIT("stdcall") }
620 var_occ :: { OccName }
621 : var_fs { mkSysOccFS varName $1 }
623 var_name :: { RdrName }
624 var_name : var_occ { mkRdrUnqual $1 }
626 qvar_name :: { RdrName }
627 qvar_name : var_name { $1 }
628 | QVARID { mkIfaceOrig varName $1 }
630 ipvar_name :: { IPName RdrName }
631 : IPDUPVARID { Dupable (mkRdrUnqual (mkSysOccFS varName $1)) }
632 | IPSPLITVARID { Linear (mkRdrUnqual (mkSysOccFS varName $1)) }
634 qvar_names1 :: { [RdrName] }
635 qvar_names1 : qvar_name { [$1] }
636 | qvar_name qvar_names1 { $1 : $2 }
638 var_names :: { [RdrName] }
640 | var_name var_names { $1 : $2 }
642 var_names1 :: { [RdrName] }
643 var_names1 : var_name var_names { $1 : $2 }
645 ---------------------------------------------------
647 data_occ :: { OccName }
648 : CONID { mkSysOccFS dataName $1 }
650 qdata_name :: { RdrName }
651 : data_occ { mkRdrUnqual $1 }
652 | QCONID { mkIfaceOrig dataName $1 }
654 var_or_data_name :: { RdrName }
658 ---------------------------------------------------
659 tc_occ :: { OccName }
660 : CONID { mkSysOccFS tcName $1 }
662 qtc_name :: { RdrName }
663 : tc_occ { mkRdrUnqual $1 }
664 | QCONID { mkIfaceOrig tcName $1 }
666 ---------------------------------------------------
667 qcls_name :: { RdrName }
668 : CONID { mkRdrUnqual (mkSysOccFS clsName $1) }
669 | QCONID { mkIfaceOrig clsName $1 }
671 ---------------------------------------------------
672 tv_name :: { RdrName }
673 : var_fs { mkRdrUnqual (mkSysOccFS tvName $1) }
675 tv_bndr :: { HsTyVarBndr RdrName }
676 : tv_name '::' akind { IfaceTyVar $1 $3 }
677 | tv_name { IfaceTyVar $1 liftedTypeKind }
679 tv_bndrs :: { [HsTyVarBndr RdrName] }
681 | '[' tv_bndrs1 ']' { $2 } -- Backward compatibility
683 tv_bndrs1 :: { [HsTyVarBndr RdrName] }
685 | tv_bndr tv_bndrs1 { $1 : $2 }
687 ---------------------------------------------------
688 fds :: { [([RdrName], [RdrName])] }
690 | '|' fds1 { reverse $2 }
692 fds1 :: { [([RdrName], [RdrName])] }
693 : fds1 ',' fd { $3 : $1 }
696 fd :: { ([RdrName], [RdrName]) }
697 : varids0 '->' varids0 { (reverse $1, reverse $3) }
699 varids0 :: { [RdrName] }
701 | varids0 tv_name { $2 : $1 }
703 ---------------------------------------------------
706 | akind '->' kind { mkArrowKind $1 $3 }
709 : VARSYM { if $1 == SLIT("*") then
711 else if $1 == SLIT("?") then
713 else if $1 == SLIT("\36") then
714 usageTypeKind -- dollar
715 else panic "ParseInterface: akind"
717 | '(' kind ')' { $2 }
719 --------------------------------------------------------------------------
721 id_info :: { [HsIdInfo RdrName] }
722 : id_info_item { [$1] }
723 | id_info_item id_info { $1 : $2 }
725 id_info_item :: { HsIdInfo RdrName }
726 : '__A' INTEGER { HsArity (fromInteger $2) }
727 | '__U' activation core_expr { HsUnfold $2 $3 }
728 | '__S' { HsStrictness $1 }
729 | '__C' { HsNoCafRefs }
730 | '__P' qvar_name INTEGER { HsWorker $2 (fromInteger $3) }
732 -------------------------------------------------------
733 core_expr :: { UfExpr RdrName }
734 core_expr : '\\' core_bndrs '->' core_expr { foldr UfLam $4 $2 }
735 | 'case' core_expr 'of' var_name
736 '{' core_alts '}' { UfCase $2 $4 $6 }
738 | 'let' '{' core_val_bndr '=' core_expr
739 '}' 'in' core_expr { UfLet (UfNonRec $3 $5) $8 }
740 | '__letrec' '{' rec_binds '}'
741 'in' core_expr { UfLet (UfRec $3) $6 }
743 | '__litlit' STRING atype { UfLitLit $2 $3 }
747 fexpr :: { UfExpr RdrName }
748 fexpr : fexpr core_arg { UfApp $1 $2 }
749 | scc core_aexpr { UfNote (UfSCC $1) $2 }
750 | '__inline_me' core_aexpr { UfNote UfInlineMe $2 }
751 | '__inline_call' core_aexpr { UfNote UfInlineCall $2 }
752 | '__coerce' atype core_aexpr { UfNote (UfCoerce $2) $3 }
755 core_arg :: { UfExpr RdrName }
756 : '@' atype { UfType $2 }
759 core_args :: { [UfExpr RdrName] }
761 | core_arg core_args { $1 : $2 }
763 core_aexpr :: { UfExpr RdrName } -- Atomic expressions
764 core_aexpr : qvar_name { UfVar $1 }
765 | qdata_name { UfVar $1 }
767 | core_lit { UfLit $1 }
768 | '(' core_expr ')' { $2 }
770 | '(' ')' { UfTuple (mkHsTupCon dataName Boxed []) [] }
771 | '(' comma_exprs2 ')' { UfTuple (mkHsTupCon dataName Boxed $2) $2 }
772 | '(#' comma_exprs0 '#)' { UfTuple (mkHsTupCon dataName Unboxed $2) $2 }
774 | '{' '__ccall' ccall_string type '}'
776 (is_dyn, is_casm, may_gc) = $2
778 target | is_dyn = DynamicTarget
779 | is_casm = CasmTarget $3
780 | otherwise = StaticTarget $3
782 ccall = CCallSpec target CCallConv may_gc
784 UfFCall (CCall ccall) $4
788 comma_exprs0 :: { [UfExpr RdrName] } -- Zero or more
789 comma_exprs0 : {- empty -} { [ ] }
790 | core_expr { [ $1 ] }
791 | comma_exprs2 { $1 }
793 comma_exprs2 :: { [UfExpr RdrName] } -- Two or more
794 comma_exprs2 : core_expr ',' core_expr { [$1,$3] }
795 | core_expr ',' comma_exprs2 { $1 : $3 }
797 rec_binds :: { [(UfBinder RdrName, UfExpr RdrName)] }
799 | core_val_bndr '=' core_expr ';' rec_binds { ($1,$3) : $5 }
801 core_alts :: { [UfAlt RdrName] }
803 | core_alt ';' core_alts { $1 : $3 }
805 core_alt :: { UfAlt RdrName }
806 core_alt : core_pat '->' core_expr { (fst $1, snd $1, $3) }
808 core_pat :: { (UfConAlt RdrName, [RdrName]) }
809 core_pat : core_lit { (UfLitAlt $1, []) }
810 | '__litlit' STRING atype { (UfLitLitAlt $2 $3, []) }
811 | qdata_name core_pat_names { (UfDataAlt $1, $2) }
812 | '(' ')' { (UfTupleAlt (mkHsTupCon dataName Boxed []), []) }
813 | '(' comma_var_names1 ')' { (UfTupleAlt (mkHsTupCon dataName Boxed $2), $2) }
814 | '(#' comma_var_names1 '#)' { (UfTupleAlt (mkHsTupCon dataName Unboxed $2), $2) }
815 | '__DEFAULT' { (UfDefault, []) }
816 | '(' core_pat ')' { $2 }
818 core_pat_names :: { [RdrName] }
819 core_pat_names : { [] }
820 | core_pat_name core_pat_names { $1 : $2 }
822 -- Tyvar names and variable names live in different name spaces
823 -- so they need to be signalled separately. But we don't record
824 -- types or kinds in a pattern; we work that out from the type
825 -- of the case scrutinee
826 core_pat_name :: { RdrName }
827 core_pat_name : var_name { $1 }
830 comma_var_names1 :: { [RdrName] } -- One or more
831 comma_var_names1 : var_name { [$1] }
832 | var_name ',' comma_var_names1 { $1 : $3 }
834 core_lit :: { Literal }
835 core_lit : integer { mkMachInt $1 }
836 | CHAR { MachChar $1 }
837 | STRING { MachStr $1 }
838 | rational { MachDouble $1 }
839 | '__word' integer { mkMachWord $2 }
840 | '__word64' integer { mkMachWord64 $2 }
841 | '__int64' integer { mkMachInt64 $2 }
842 | '__float' rational { MachFloat $2 }
843 | '__addr' integer { MachAddr $2 }
844 | '__label' STRING { MachLabel $2 }
846 integer :: { Integer }
848 | '-' INTEGER { (-$2) }
850 rational :: { Rational }
852 | '-' RATIONAL { (-$2) }
854 core_bndr :: { UfBinder RdrName }
855 core_bndr : core_val_bndr { $1 }
856 | core_tv_bndr { $1 }
858 core_bndrs :: { [UfBinder RdrName] }
860 | core_bndr core_bndrs { $1 : $2 }
862 core_val_bndr :: { UfBinder RdrName }
863 core_val_bndr : var_name '::' atype { UfValBinder $1 $3 }
865 core_tv_bndr :: { UfBinder RdrName }
866 core_tv_bndr : '@' tv_name '::' akind { UfTyBinder $2 $4 }
867 | '@' tv_name { UfTyBinder $2 liftedTypeKind }
869 ccall_string :: { FAST_STRING }
875 ------------------------------------------------------------------------
876 scc :: { CostCentre }
877 : '__sccC' '{' mod_name '}' { AllCafsCC $3 }
878 | '__scc' '{' cc_name mod_name cc_dup cc_caf '}'
879 { NormalCC { cc_name = $3, cc_mod = $4,
880 cc_is_dupd = $5, cc_is_caf = $6 } }
882 cc_name :: { EncodedFS }
886 cc_dup :: { IsDupdCC }
887 cc_dup : { OriginalCC }
890 cc_caf :: { IsCafCC }
894 -------------------------------------------------------------------
896 src_loc :: { SrcLoc }
897 src_loc : {% getSrcLocP }
899 -- Check the project version: this makes sure
900 -- that the project version (e.g. 407) in the interface
901 -- file is the same as that for the compiler that's reading it
902 checkVersion :: { () }
903 : {-empty-} {% checkVersion Nothing }
904 | INTEGER {% checkVersion (Just (fromInteger $1)) }
906 -------------------------------------------------------------------
911 happyError buf PState{ loc = loc } = PFailed (ifaceParseErr buf loc)
913 mk_con_decl name (ex_tvs, ex_ctxt) details loc = mkConDecl name ex_tvs ex_ctxt details loc