{- -*-haskell-*-
-----------------------------------------------------------------------------
-$Id: Parser.y,v 1.106 2002/10/09 15:03:53 simonpj Exp $
+$Id: Parser.y,v 1.123 2003/09/16 13:03:44 simonmar Exp $
Haskell grammar.
import HsTypes ( mkHsTupCon )
import RdrHsSyn
-import HscTypes ( ParsedIface(..), IsBootInterface )
-import Lex
+import HscTypes ( ParsedIface(..), IsBootInterface, noDependencies )
+import Lexer
import RdrName
import PrelNames ( mAIN_Name, funTyConName, listTyConName,
- parrTyConName, consDataConName, nilDataConName )
-import TysWiredIn ( unitTyCon, unitDataCon, tupleTyCon, tupleCon )
+ parrTyConName, consDataConName )
+import TysWiredIn ( unitTyCon, unitDataCon, tupleTyCon,
+ tupleCon, nilDataCon )
import ForeignCall ( Safety(..), CExportSpec(..),
CCallConv(..), CCallTarget(..), defaultCCallConv,
)
import OccName ( UserFS, varName, tcName, dataName, tcClsName, tvName )
import TyCon ( DataConDetails(..) )
+import DataCon ( DataCon, dataConName )
import SrcLoc ( SrcLoc )
import Module
import CmdLineOpts ( opt_SccProfilingOn, opt_InPackage )
import Type ( Kind, mkArrowKind, liftedTypeKind )
-import BasicTypes ( Boxity(..), Fixity(..), FixityDirection(..), IPName(..),
- NewOrData(..), StrictnessMark(..), Activation(..),
- FixitySig(..) )
+import BasicTypes ( Boxity(..), Fixity(..), FixityDirection(..),
+ IPName(..), NewOrData(..), StrictnessMark(..),
+ Activation(..), FixitySig(..) )
import Panic
import GLAEXTS
import FastString
import Maybes ( orElse )
import Outputable
+import Char ( ord )
}
-}
%token
- '_' { ITunderscore } -- Haskell keywords
- 'as' { ITas }
- 'case' { ITcase }
- 'class' { ITclass }
- 'data' { ITdata }
- 'default' { ITdefault }
- 'deriving' { ITderiving }
- 'do' { ITdo }
- 'else' { ITelse }
- 'hiding' { IThiding }
- 'if' { ITif }
- 'import' { ITimport }
- 'in' { ITin }
- 'infix' { ITinfix }
- 'infixl' { ITinfixl }
- 'infixr' { ITinfixr }
- 'instance' { ITinstance }
- 'let' { ITlet }
- 'module' { ITmodule }
- 'newtype' { ITnewtype }
- 'of' { ITof }
- 'qualified' { ITqualified }
- 'then' { ITthen }
- 'type' { ITtype }
- 'where' { ITwhere }
- '_scc_' { ITscc } -- ToDo: remove
-
- 'forall' { ITforall } -- GHC extension keywords
- 'foreign' { ITforeign }
- 'export' { ITexport }
- 'label' { ITlabel }
- 'dynamic' { ITdynamic }
- 'safe' { ITsafe }
- 'threadsafe' { ITthreadsafe }
- 'unsafe' { ITunsafe }
- 'with' { ITwith }
- 'mdo' { ITmdo }
- 'stdcall' { ITstdcallconv }
- 'ccall' { ITccallconv }
- 'dotnet' { ITdotnet }
- '_ccall_' { ITccall (False, False, PlayRisky) }
- '_ccall_GC_' { ITccall (False, False, PlaySafe False) }
- '_casm_' { ITccall (False, True, PlayRisky) }
- '_casm_GC_' { ITccall (False, True, PlaySafe False) }
-
- '{-# SPECIALISE' { ITspecialise_prag }
- '{-# SOURCE' { ITsource_prag }
- '{-# INLINE' { ITinline_prag }
- '{-# NOINLINE' { ITnoinline_prag }
- '{-# RULES' { ITrules_prag }
- '{-# SCC' { ITscc_prag }
- '{-# DEPRECATED' { ITdeprecated_prag }
- '#-}' { ITclose_prag }
-
-{-
- '__interface' { ITinterface } -- interface keywords
- '__export' { IT__export }
- '__instimport' { ITinstimport }
- '__forall' { IT__forall }
- '__letrec' { ITletrec }
- '__coerce' { ITcoerce }
- '__depends' { ITdepends }
- '__inline' { ITinline }
- '__DEFAULT' { ITdefaultbranch }
- '__bot' { ITbottom }
- '__integer' { ITinteger_lit }
- '__float' { ITfloat_lit }
- '__rational' { ITrational_lit }
- '__addr' { ITaddr_lit }
- '__label' { ITlabel_lit }
- '__litlit' { ITlit_lit }
- '__string' { ITstring_lit }
- '__ccall' { ITccall $$ }
- '__scc' { IT__scc }
- '__sccC' { ITsccAllCafs }
-
- '__A' { ITarity }
- '__P' { ITspecialise }
- '__C' { ITnocaf }
- '__U' { ITunfold }
- '__S' { ITstrict $$ }
- '__M' { ITcprinfo $$ }
--}
-
- '..' { ITdotdot } -- reserved symbols
- ':' { ITcolon }
- '::' { ITdcolon }
- '=' { ITequal }
- '\\' { ITlam }
- '|' { ITvbar }
- '<-' { ITlarrow }
- '->' { ITrarrow }
- '@' { ITat }
- '~' { ITtilde }
- '=>' { ITdarrow }
- '-' { ITminus }
- '!' { ITbang }
- '*' { ITstar }
- '.' { ITdot }
-
- '{' { ITocurly } -- special symbols
- '}' { ITccurly }
- '{|' { ITocurlybar }
- '|}' { ITccurlybar }
- vccurly { ITvccurly } -- virtual close curly (from layout)
- '[' { ITobrack }
- ']' { ITcbrack }
- '[:' { ITopabrack }
- ':]' { ITcpabrack }
- '(' { IToparen }
- ')' { ITcparen }
- '(#' { IToubxparen }
- '#)' { ITcubxparen }
- ';' { ITsemi }
- ',' { ITcomma }
- '`' { ITbackquote }
-
- VARID { ITvarid $$ } -- identifiers
- CONID { ITconid $$ }
- VARSYM { ITvarsym $$ }
- CONSYM { ITconsym $$ }
- QVARID { ITqvarid $$ }
- QCONID { ITqconid $$ }
- QVARSYM { ITqvarsym $$ }
- QCONSYM { ITqconsym $$ }
-
- IPDUPVARID { ITdupipvarid $$ } -- GHC extension
- IPSPLITVARID { ITsplitipvarid $$ } -- GHC extension
-
- CHAR { ITchar $$ }
- STRING { ITstring $$ }
- INTEGER { ITinteger $$ }
- RATIONAL { ITrational $$ }
-
- PRIMCHAR { ITprimchar $$ }
- PRIMSTRING { ITprimstring $$ }
- PRIMINTEGER { ITprimint $$ }
- PRIMFLOAT { ITprimfloat $$ }
- PRIMDOUBLE { ITprimdouble $$ }
- CLITLIT { ITlitlit $$ }
+ '_' { T _ _ ITunderscore } -- Haskell keywords
+ 'as' { T _ _ ITas }
+ 'case' { T _ _ ITcase }
+ 'class' { T _ _ ITclass }
+ 'data' { T _ _ ITdata }
+ 'default' { T _ _ ITdefault }
+ 'deriving' { T _ _ ITderiving }
+ 'do' { T _ _ ITdo }
+ 'else' { T _ _ ITelse }
+ 'hiding' { T _ _ IThiding }
+ 'if' { T _ _ ITif }
+ 'import' { T _ _ ITimport }
+ 'in' { T _ _ ITin }
+ 'infix' { T _ _ ITinfix }
+ 'infixl' { T _ _ ITinfixl }
+ 'infixr' { T _ _ ITinfixr }
+ 'instance' { T _ _ ITinstance }
+ 'let' { T _ _ ITlet }
+ 'module' { T _ _ ITmodule }
+ 'newtype' { T _ _ ITnewtype }
+ 'of' { T _ _ ITof }
+ 'qualified' { T _ _ ITqualified }
+ 'then' { T _ _ ITthen }
+ 'type' { T _ _ ITtype }
+ 'where' { T _ _ ITwhere }
+ '_scc_' { T _ _ ITscc } -- ToDo: remove
+
+ 'forall' { T _ _ ITforall } -- GHC extension keywords
+ 'foreign' { T _ _ ITforeign }
+ 'export' { T _ _ ITexport }
+ 'label' { T _ _ ITlabel }
+ 'dynamic' { T _ _ ITdynamic }
+ 'safe' { T _ _ ITsafe }
+ 'threadsafe' { T _ _ ITthreadsafe }
+ 'unsafe' { T _ _ ITunsafe }
+ 'with' { T _ _ ITwith }
+ 'mdo' { T _ _ ITmdo }
+ 'stdcall' { T _ _ ITstdcallconv }
+ 'ccall' { T _ _ ITccallconv }
+ 'dotnet' { T _ _ ITdotnet }
+ 'proc' { T _ _ ITproc } -- for arrow notation extension
+ 'rec' { T _ _ ITrec } -- for arrow notation extension
+
+ '{-# SPECIALISE' { T _ _ ITspecialise_prag }
+ '{-# SOURCE' { T _ _ ITsource_prag }
+ '{-# INLINE' { T _ _ ITinline_prag }
+ '{-# NOINLINE' { T _ _ ITnoinline_prag }
+ '{-# RULES' { T _ _ ITrules_prag }
+ '{-# CORE' { T _ _ ITcore_prag } -- hdaume: annotated core
+ '{-# SCC' { T _ _ ITscc_prag }
+ '{-# DEPRECATED' { T _ _ ITdeprecated_prag }
+ '#-}' { T _ _ ITclose_prag }
+
+ '..' { T _ _ ITdotdot } -- reserved symbols
+ ':' { T _ _ ITcolon }
+ '::' { T _ _ ITdcolon }
+ '=' { T _ _ ITequal }
+ '\\' { T _ _ ITlam }
+ '|' { T _ _ ITvbar }
+ '<-' { T _ _ ITlarrow }
+ '->' { T _ _ ITrarrow }
+ '@' { T _ _ ITat }
+ '~' { T _ _ ITtilde }
+ '=>' { T _ _ ITdarrow }
+ '-' { T _ _ ITminus }
+ '!' { T _ _ ITbang }
+ '*' { T _ _ ITstar }
+ '-<' { T _ _ ITlarrowtail } -- for arrow notation
+ '>-' { T _ _ ITrarrowtail } -- for arrow notation
+ '-<<' { T _ _ ITLarrowtail } -- for arrow notation
+ '>>-' { T _ _ ITRarrowtail } -- for arrow notation
+ '.' { T _ _ ITdot }
+
+ '{' { T _ _ ITocurly } -- special symbols
+ '}' { T _ _ ITccurly }
+ '{|' { T _ _ ITocurlybar }
+ '|}' { T _ _ ITccurlybar }
+ vocurly { T _ _ ITvocurly } -- virtual open curly (from layout)
+ vccurly { T _ _ ITvccurly } -- virtual close curly (from layout)
+ '[' { T _ _ ITobrack }
+ ']' { T _ _ ITcbrack }
+ '[:' { T _ _ ITopabrack }
+ ':]' { T _ _ ITcpabrack }
+ '(' { T _ _ IToparen }
+ ')' { T _ _ ITcparen }
+ '(#' { T _ _ IToubxparen }
+ '#)' { T _ _ ITcubxparen }
+ '(|' { T _ _ IToparenbar }
+ '|)' { T _ _ ITcparenbar }
+ ';' { T _ _ ITsemi }
+ ',' { T _ _ ITcomma }
+ '`' { T _ _ ITbackquote }
+
+ VARID { T _ _ (ITvarid $$) } -- identifiers
+ CONID { T _ _ (ITconid $$) }
+ VARSYM { T _ _ (ITvarsym $$) }
+ CONSYM { T _ _ (ITconsym $$) }
+ QVARID { T _ _ (ITqvarid $$) }
+ QCONID { T _ _ (ITqconid $$) }
+ QVARSYM { T _ _ (ITqvarsym $$) }
+ QCONSYM { T _ _ (ITqconsym $$) }
+
+ IPDUPVARID { T _ _ (ITdupipvarid $$) } -- GHC extension
+ IPSPLITVARID { T _ _ (ITsplitipvarid $$) } -- GHC extension
+
+ CHAR { T _ _ (ITchar $$) }
+ STRING { T _ _ (ITstring $$) }
+ INTEGER { T _ _ (ITinteger $$) }
+ RATIONAL { T _ _ (ITrational $$) }
+
+ PRIMCHAR { T _ _ (ITprimchar $$) }
+ PRIMSTRING { T _ _ (ITprimstring $$) }
+ PRIMINTEGER { T _ _ (ITprimint $$) }
+ PRIMFLOAT { T _ _ (ITprimfloat $$) }
+ PRIMDOUBLE { T _ _ (ITprimdouble $$) }
-- Template Haskell
-'[|' { ITopenExpQuote }
-'[p|' { ITopenPatQuote }
-'[t|' { ITopenTypQuote }
-'[d|' { ITopenDecQuote }
-'|]' { ITcloseQuote }
-ID_SPLICE { ITidEscape $$ } -- $x
-'$(' { ITparenEscape } -- $( exp )
-
-%monad { P } { thenP } { returnP }
-%lexer { lexer } { ITeof }
+'[|' { T _ _ ITopenExpQuote }
+'[p|' { T _ _ ITopenPatQuote }
+'[t|' { T _ _ ITopenTypQuote }
+'[d|' { T _ _ ITopenDecQuote }
+'|]' { T _ _ ITcloseQuote }
+ID_SPLICE { T _ _ (ITidEscape $$) } -- $x
+'$(' { T _ _ ITparenEscape } -- $( exp )
+REIFY_TYPE { T _ _ ITreifyType }
+REIFY_DECL { T _ _ ITreifyDecl }
+REIFY_FIXITY { T _ _ ITreifyFixity }
+
+%monad { P } { >>= } { return }
+%lexer { lexer } { T _ _ ITeof }
%name parseModule module
%name parseStmt maybe_stmt
%name parseIdentifier identifier
module :: { RdrNameHsModule }
: srcloc 'module' modid maybemoddeprec maybeexports 'where' body
- { HsModule (mkHomeModule $3) Nothing $5 (fst $7) (snd $7) $4 $1 }
- | srcloc body
- { HsModule (mkHomeModule mAIN_Name) Nothing Nothing
- (fst $2) (snd $2) Nothing $1 }
+ { HsModule (Just (mkHomeModule $3)) $5 (fst $7) (snd $7) $4 $1 }
+ | srcloc missing_module_keyword top close
+ { HsModule Nothing Nothing (fst $3) (snd $3) Nothing $1 }
+
+missing_module_keyword :: { () }
+ : {- empty -} {% pushCurrentContext }
maybemoddeprec :: { Maybe DeprecTxt }
: '{-# DEPRECATED' STRING '#-}' { Just $2 }
body :: { ([RdrNameImportDecl], [RdrNameHsDecl]) }
: '{' top '}' { $2 }
- | layout_on top close { $2 }
+ | vocurly top close { $2 }
top :: { ([RdrNameImportDecl], [RdrNameHsDecl]) }
: importdecls { (reverse $1,[]) }
pi_vers = 1, -- Module version
pi_orphan = False,
pi_exports = (1,[($2,mkIfaceExports $4)]),
+ pi_deps = noDependencies,
pi_usages = [],
pi_fixity = [],
pi_insts = [],
ifacebody :: { [RdrNameTyClDecl] }
: '{' ifacedecls '}' { $2 }
- | layout_on ifacedecls close { $2 }
+ | vocurly ifacedecls close { $2 }
ifacedecls :: { [RdrNameTyClDecl] }
: ifacedecl ';' ifacedecls { $1 : $3 }
in RdrHsDecl (InstD (InstDecl $3 binds sigs Nothing $1)) }
| srcloc 'default' '(' comma_types0 ')' { RdrHsDecl (DefD (DefaultDecl $4 $1)) }
| 'foreign' fdecl { RdrHsDecl $2 }
- | '{-# DEPRECATED' deprecations '#-}' { RdrBindings $2 }
- | '{-# RULES' rules '#-}' { RdrBindings $2 }
- | '$(' exp ')' { RdrHsDecl (SpliceD $2) }
+ | '{-# DEPRECATED' deprecations '#-}' { RdrBindings (reverse $2) }
+ | '{-# RULES' rules '#-}' { RdrBindings (reverse $2) }
+ | srcloc '$(' exp ')' { RdrHsDecl (SpliceD (SpliceDecl $3 $1)) }
| decl { $1 }
tycl_decl :: { RdrNameTyClDecl }
{ let
(binds,sigs) = cvMonoBindsAndSigs $5
in
- mkClassDecl $3 $4 (map cvClassOpSig sigs) (Just binds) $1 }
+ mkClassDecl $3 $4 sigs (Just binds) $1 }
syn_hdr :: { (RdrName, [RdrNameHsTyVar]) } -- We don't retain the syntax of an infix
-- type synonym declaration. Oh well.
-- (Eq a, Ord b) => T a b
-- Rather a lot of inlining here, else we get reduce/reduce errors
tycl_hdr :: { (RdrNameContext, RdrName, [RdrNameHsTyVar]) }
- : context '=>' type {% checkTyClHdr $3 `thenP` \ (tc,tvs) ->
- returnP ($1, tc, tvs) }
- | type {% checkTyClHdr $1 `thenP` \ (tc,tvs) ->
- returnP ([], tc, tvs) }
+ : context '=>' type {% checkTyClHdr $3 >>= \ (tc,tvs) ->
+ return ($1, tc, tvs) }
+ | type {% checkTyClHdr $1 >>= \ (tc,tvs) ->
+ return ([], tc, tvs) }
-----------------------------------------------------------------------------
-- Nested declarations
| {- empty -} { [] }
-wherebinds :: { RdrNameHsBinds }
- : where { cvBinds $1 }
+decllist :: { [RdrBinding] } -- Reversed
+ : '{' decls '}' { $2 }
+ | vocurly decls close { $2 }
where :: { [RdrBinding] } -- Reversed
+ -- No implicit parameters
: 'where' decllist { $2 }
| {- empty -} { [] }
-decllist :: { [RdrBinding] } -- Reversed
- : '{' decls '}' { $2 }
- | layout_on decls close { $2 }
+binds :: { RdrNameHsBinds } -- May have implicit parameters
+ : decllist { cvBinds $1 }
+ | '{' dbinds '}' { IPBinds $2 False{-not with-} }
+ | vocurly dbinds close { IPBinds $2 False{-not with-} }
-letbinds :: { RdrNameHsExpr -> RdrNameHsExpr }
- : decllist { HsLet (cvBinds $1) }
- | '{' dbinds '}' { \e -> HsWith e $2 False{-not with-} }
- | layout_on dbinds close { \e -> HsWith e $2 False{-not with-} }
+wherebinds :: { RdrNameHsBinds } -- May have implicit parameters
+ : 'where' binds { $2 }
+ | {- empty -} { EmptyBinds }
-----------------------------------------------------------------------------
-- Transformation Rules
-rules :: { [RdrBinding] }
- : rule ';' rules { $1 : $3 }
+rules :: { [RdrBinding] } -- Reversed
+ : rules ';' rule { $3 : $1 }
+ | rules ';' { $1 }
| rule { [$1] }
| {- empty -} { [] }
| '(' varid '::' ctype ')' { RuleBndrSig $2 $4 }
-----------------------------------------------------------------------------
--- Deprecations
+-- Deprecations (c.f. rules)
-deprecations :: { [RdrBinding] }
- : deprecation ';' deprecations { $1 : $3 }
+deprecations :: { [RdrBinding] } -- Reversed
+ : deprecations ';' deprecation { $3 : $1 }
+ | deprecations ';' { $1 }
| deprecation { [$1] }
| {- empty -} { [] }
| 'import' callconv STRING STRING safety varid_no_unsafe '::' sigtype
{% case $2 of
DNCall -> parseError "Illegal format of .NET foreign import"
- CCall cconv -> returnP $
+ CCall cconv -> return $
let
imp = CFunction (StaticTarget $4)
in
| 'import' callconv STRING 'unsafe' varid_no_unsafe '::' sigtype
{% case $2 of
DNCall -> parseError "Illegal format of .NET foreign import"
- CCall cconv -> returnP $
+ CCall cconv -> return $
let
imp = CFunction (StaticTarget $3)
in
| 'import' callconv 'dynamic' safety varid_no_unsafe '::' sigtype
{% case $2 of
DNCall -> parseError "Illegal format of .NET foreign import"
- CCall cconv -> returnP $
+ CCall cconv -> return $
ForeignImport $5 $7 (CImport cconv $4 nilFS nilFS
(CFunction DynamicTarget)) }
| 'export' callconv STRING STRING varid '::' sigtype
{% case $2 of
DNCall -> parseError "Illegal format of .NET foreign import"
- CCall cconv -> returnP $
+ CCall cconv -> return $
ForeignExport $5 $7
(CExport (CExportStatic $4 cconv)) }
| 'export' callconv 'dynamic' varid '::' sigtype
{% case $2 of
DNCall -> parseError "Illegal format of .NET foreign import"
- CCall cconv -> returnP $
+ CCall cconv -> return $
ForeignImport $4 $6 (CImport cconv (PlaySafe False) nilFS nilFS CWrapper) }
----------- DEPRECATED .NET decls ------------
exp :: { RdrNameHsExpr }
: infixexp '::' sigtype { ExprWithTySig $1 $3 }
- | infixexp 'with' dbinding { HsWith $1 $3 True{-not a let-} }
+ | infixexp 'with' dbinding { HsLet (IPBinds $3 True{-not a let-}) $1 }
+ | fexp srcloc '-<' exp { HsArrApp $1 $4 placeHolderType HsFirstOrderApp True $2 }
+ | fexp srcloc '>-' exp { HsArrApp $4 $1 placeHolderType HsFirstOrderApp False $2 }
+ | fexp srcloc '-<<' exp { HsArrApp $1 $4 placeHolderType HsHigherOrderApp True $2 }
+ | fexp srcloc '>>-' exp { HsArrApp $4 $1 placeHolderType HsHigherOrderApp False $2 }
| infixexp { $1 }
infixexp :: { RdrNameHsExpr }
exp10 :: { RdrNameHsExpr }
: '\\' srcloc aexp aexps opt_asig '->' srcloc exp
- {% checkPatterns $2 ($3 : reverse $4) `thenP` \ ps ->
- returnP (HsLam (Match ps $5
+ {% checkPatterns $2 ($3 : reverse $4) >>= \ ps ->
+ return (HsLam (Match ps $5
(GRHSs (unguardedRHS $8 $7)
EmptyBinds placeHolderType))) }
- | 'let' letbinds 'in' exp { $2 $4 }
+ | 'let' binds 'in' exp { HsLet $2 $4 }
| 'if' srcloc exp 'then' exp 'else' exp { HsIf $3 $5 $7 $2 }
| 'case' srcloc exp 'of' altslist { HsCase $3 $5 $2 }
| '-' fexp { mkHsNegApp $2 }
- | srcloc 'do' stmtlist {% checkDo $3 `thenP` \ stmts ->
- returnP (mkHsDo DoExpr stmts $1) }
- | srcloc 'mdo' stmtlist {% checkMDo $3 `thenP` \ stmts ->
- returnP (mkHsDo MDoExpr stmts $1) }
-
- | '_ccall_' ccallid aexps0 { HsCCall $2 $3 PlayRisky False placeHolderType }
- | '_ccall_GC_' ccallid aexps0 { HsCCall $2 $3 (PlaySafe False) False placeHolderType }
- | '_casm_' CLITLIT aexps0 { HsCCall $2 $3 PlayRisky True placeHolderType }
- | '_casm_GC_' CLITLIT aexps0 { HsCCall $2 $3 (PlaySafe False) True placeHolderType }
+ | srcloc 'do' stmtlist {% checkDo $3 >>= \ stmts ->
+ return (mkHsDo DoExpr stmts $1) }
+ | srcloc 'mdo' stmtlist {% checkMDo $3 >>= \ stmts ->
+ return (mkHsDo MDoExpr stmts $1) }
| scc_annot exp { if opt_SccProfilingOn
then HsSCC $1 $2
else HsPar $2 }
+ | 'proc' srcloc aexp '->' srcloc exp
+ {% checkPattern $2 $3 >>= \ p ->
+ return (HsProc p (HsCmdTop $6 [] placeHolderType undefined) $5) }
+
+ | '{-# CORE' STRING '#-}' exp { HsCoreAnn $2 $4 } -- hdaume: core annotation
+
+ | reifyexp { HsReify $1 }
| fexp { $1 }
scc_annot :: { FastString }
: fexp aexp { (HsApp $1 $2) }
| aexp { $1 }
+reifyexp :: { HsReify RdrName }
+ : REIFY_DECL gtycon { Reify ReifyDecl $2 }
+ | REIFY_DECL qvar { Reify ReifyDecl $2 }
+ | REIFY_TYPE qcname { Reify ReifyType $2 }
+ | REIFY_FIXITY qcname { Reify ReifyFixity $2 }
+
aexps0 :: { [RdrNameHsExpr] }
: aexps { reverse $1 }
: ipvar { HsIPVar $1 }
| qcname { HsVar $1 }
| literal { HsLit $1 }
- | INTEGER { HsOverLit (mkHsIntegral $1) }
- | RATIONAL { HsOverLit (mkHsFractional $1) }
+ | INTEGER { HsOverLit $! mkHsIntegral $1 }
+ | RATIONAL { HsOverLit $! mkHsFractional $1 }
| '(' exp ')' { HsPar $2 }
| '(' exp ',' texps ')' { ExplicitTuple ($2 : reverse $4) Boxed}
| '(#' texps '#)' { ExplicitTuple (reverse $2) Unboxed }
| '_' { EWildPat }
-- MetaHaskell Extension
- | ID_SPLICE { mkHsSplice (HsVar (mkUnqual varName $1))} -- $x
- | '$(' exp ')' { mkHsSplice $2 } -- $( exp )
- | '[|' exp '|]' { HsBracket (ExpBr $2) }
- | '[t|' ctype '|]' { HsBracket (TypBr $2) }
- | '[p|' srcloc infixexp '|]' {% checkPattern $2 $3 `thenP` \p ->
- returnP (HsBracket (PatBr p)) }
- | '[d|' cvtopdecls '|]' { HsBracket (DecBr (mkGroup $2)) }
+ | srcloc ID_SPLICE { mkHsSplice (HsVar (mkUnqual varName $2)) $1 } -- $x
+ | srcloc '$(' exp ')' { mkHsSplice $3 $1 } -- $( exp )
+ | srcloc '[|' exp '|]' { HsBracket (ExpBr $3) $1 }
+ | srcloc '[t|' ctype '|]' { HsBracket (TypBr $3) $1 }
+ | srcloc '[p|' infixexp '|]' {% checkPattern $1 $3 >>= \p ->
+ return (HsBracket (PatBr p) $1) }
+ | srcloc '[d|' cvtopbody '|]' { HsBracket (DecBr (mkGroup $3)) $1 }
+
+ -- arrow notation extension
+ | srcloc '(|' aexp2 cmdargs '|)'
+ { HsArrForm $3 Nothing (reverse $4) $1 }
+
+cmdargs :: { [RdrNameHsCmdTop] }
+ : cmdargs acmd { $2 : $1 }
+ | {- empty -} { [] }
+acmd :: { RdrNameHsCmdTop }
+ : aexp2 { HsCmdTop $1 [] placeHolderType undefined }
+
+cvtopbody :: { [RdrNameHsDecl] }
+ : '{' cvtopdecls '}' { $2 }
+ | vocurly cvtopdecls close { $2 }
texps :: { [RdrNameHsExpr] }
: texps ',' exp { $3 : $1 }
| exp ',' exp '..' { ArithSeqIn (FromThen $1 $3) }
| exp '..' exp { ArithSeqIn (FromTo $1 $3) }
| exp ',' exp '..' exp { ArithSeqIn (FromThenTo $1 $3 $5) }
- | exp srcloc pquals {% let { body [qs] = qs;
- body qss = [ParStmt (map reverse qss)] }
- in
- returnP ( mkHsDo ListComp
- (reverse (ResultStmt $1 $2 : body $3))
- $2
- )
+ | exp srcloc pquals { mkHsDo ListComp
+ (reverse (ResultStmt $1 $2 : $3))
+ $2
}
lexps :: { [RdrNameHsExpr] }
-----------------------------------------------------------------------------
-- List Comprehensions
-pquals :: { [[RdrNameStmt]] }
- : pquals '|' quals { $3 : $1 }
+pquals :: { [RdrNameStmt] } -- Either a singleton ParStmt, or a reversed list of Stmts
+ : pquals1 { case $1 of
+ [qs] -> qs
+ qss -> [ParStmt stmtss]
+ where
+ stmtss = [ (reverse qs, undefined)
+ | qs <- qss ]
+ }
+
+pquals1 :: { [[RdrNameStmt]] }
+ : pquals1 '|' quals { $3 : $1 }
| '|' quals { [$2] }
quals :: { [RdrNameStmt] }
- : quals ',' stmt { $3 : $1 }
- | stmt { [$1] }
+ : quals ',' qual { $3 : $1 }
+ | qual { [$1] }
-----------------------------------------------------------------------------
-- Parallel array expressions
(reverse $1) }
| exp '..' exp { PArrSeqIn (FromTo $1 $3) }
| exp ',' exp '..' exp { PArrSeqIn (FromThenTo $1 $3 $5) }
- | exp srcloc pquals {% let {
- body [qs] = qs;
- body qss = [ParStmt
- (map reverse qss)]}
- in
- returnP $
- mkHsDo PArrComp
- (reverse (ResultStmt $1 $2
- : body $3))
- $2
+ | exp srcloc pquals { mkHsDo PArrComp
+ (reverse (ResultStmt $1 $2 : $3))
+ $2
}
-- We are reusing `lexps' and `pquals' from the list case.
altslist :: { [RdrNameMatch] }
: '{' alts '}' { reverse $2 }
- | layout_on alts close { reverse $2 }
+ | vocurly alts close { reverse $2 }
alts :: { [RdrNameMatch] }
: alts1 { $1 }
alt :: { RdrNameMatch }
: srcloc infixexp opt_sig ralt wherebinds
- {% (checkPattern $1 $2 `thenP` \p ->
- returnP (Match [p] $3
+ {% (checkPattern $1 $2 >>= \p ->
+ return (Match [p] $3
(GRHSs $4 $5 placeHolderType)) )}
ralt :: { [RdrNameGRHS] }
-- Statement sequences
stmtlist :: { [RdrNameStmt] }
- : '{' stmts '}' { $2 }
- | layout_on_for_do stmts close { $2 }
+ : '{' stmts '}' { $2 }
+ | vocurly stmts close { $2 }
-- do { ;; s ; s ; ; s ;; }
-- The last Stmt should be a ResultStmt, but that's hard to enforce
| {- nothing -} { Nothing }
stmt :: { RdrNameStmt }
- : srcloc infixexp '<-' exp {% checkPattern $1 $2 `thenP` \p ->
- returnP (BindStmt p $4 $1) }
+ : qual { $1 }
+ | srcloc infixexp '->' exp {% checkPattern $1 $4 >>= \p ->
+ return (BindStmt p $2 $1) }
+ | srcloc 'rec' stmtlist { RecStmt $3 undefined undefined undefined }
+
+qual :: { RdrNameStmt }
+ : srcloc infixexp '<-' exp {% checkPattern $1 $2 >>= \p ->
+ return (BindStmt p $4 $1) }
| srcloc exp { ExprStmt $2 placeHolderType $1 }
- | srcloc 'let' decllist { LetStmt (cvBinds $3) }
+ | srcloc 'let' binds { LetStmt $3 }
-----------------------------------------------------------------------------
-- Record Field Update/Construction
dbinding :: { [(IPName RdrName, RdrNameHsExpr)] }
: '{' dbinds '}' { $2 }
- | layout_on dbinds close { $2 }
+ | vocurly dbinds close { $2 }
dbinds :: { [(IPName RdrName, RdrNameHsExpr)] }
: dbinds ';' dbind { $3 : $1 }
| tycon { $1 }
gcon :: { RdrName } -- Data constructor namespace
- : sysdcon { $1 }
+ : sysdcon { nameRdrName (dataConName $1) }
| qcon { $1 }
-- the case of '[:' ':]' is part of the production `parr'
-sysdcon :: { RdrName } -- Data constructor namespace
- : '(' ')' { getRdrName unitDataCon }
- | '(' commas ')' { getRdrName (tupleCon Boxed $2) }
- | '[' ']' { nameRdrName nilDataConName }
+sysdcon :: { DataCon } -- Wired in data constructors
+ : '(' ')' { unitDataCon }
+ | '(' commas ')' { tupleCon Boxed $2 }
+ | '[' ']' { nilDataCon }
var :: { RdrName }
: varid { $1 }
consym :: { RdrName }
: CONSYM { mkUnqual dataName $1 }
- | ':' { nameRdrName consDataConName }
+
-- ':' means only list cons
+ | ':' { nameRdrName consDataConName }
+ -- NB: SrcName because we are reading source
-----------------------------------------------------------------------------
-- Literals
literal :: { HsLit }
- : CHAR { HsChar $1 }
+ : CHAR { HsChar (ord $1) } --TODO remove ord
| STRING { HsString $1 }
| PRIMINTEGER { HsIntPrim $1 }
- | PRIMCHAR { HsCharPrim $1 }
+ | PRIMCHAR { HsCharPrim (ord $1) } --TODO remove ord
| PRIMSTRING { HsStringPrim $1 }
| PRIMFLOAT { HsFloatPrim $1 }
| PRIMDOUBLE { HsDoublePrim $1 }
- | CLITLIT { HsLitLit $1 placeHolderType }
-srcloc :: { SrcLoc } : {% getSrcLocP }
-
+srcloc :: { SrcLoc } : {% getSrcLoc }
+
-----------------------------------------------------------------------------
-- Layout
: vccurly { () } -- context popped in lexer.
| error {% popContext }
-layout_on :: { () } : {% layoutOn True{-strict-} }
-layout_on_for_do :: { () } : {% layoutOn False }
-
-----------------------------------------------------------------------------
-- Miscellaneous (mostly renamings)
{
happyError :: P a
-happyError buf PState{ loc = loc } = PFailed (srcParseErr buf loc)
+happyError = srcParseFail
}
projects / ghc-hetmet.git / blobdiff