-- ---------------------------------------------------------------------------
{
+{-# LANGUAGE BangPatterns #-} -- required for versions of Happy before 1.18.6
{-# OPTIONS -Wwarn -w #-}
-- The above warning supression flag is a temporary kludge.
-- While working on this module you are encouraged to remove it and fix
import Type ( Kind, liftedTypeKind, unliftedTypeKind )
import Coercion ( mkArrowKind )
import Class ( FunDep )
-import BasicTypes ( Boxity(..), Fixity(..), FixityDirection(..), IPName(..),
- Activation(..), RuleMatchInfo(..), defaultInlinePragma )
+import BasicTypes
import DynFlags
import OrdList
import HaddockUtils
'dynamic' { L _ ITdynamic }
'safe' { L _ ITsafe }
'threadsafe' { L _ ITthreadsafe } -- ToDo: remove deprecated alias
+ 'interruptible' { L _ ITinterruptible }
'unsafe' { L _ ITunsafe }
'mdo' { L _ ITmdo }
'family' { L _ ITfamily }
'by' { L _ ITby } -- for list transform extension
'using' { L _ ITusing } -- for list transform extension
- '{-# INLINE' { L _ (ITinline_prag _) }
- '{-# INLINE_CONLIKE' { L _ (ITinline_conlike_prag _) }
+ '{-# INLINE' { L _ (ITinline_prag _ _) }
'{-# SPECIALISE' { L _ ITspec_prag }
'{-# SPECIALISE_INLINE' { L _ (ITspec_inline_prag _) }
'{-# SOURCE' { L _ ITsource_prag }
-- (Eq a, Ord b) => T a b
-- T Int [a] -- for associated types
-- Rather a lot of inlining here, else we get reduce/reduce errors
-tycl_hdr :: { Located (LHsContext RdrName, LHsType RdrName) }
- : context '=>' type { LL ($1, $3) }
- | type { L1 (noLoc [], $1) }
+tycl_hdr :: { Located (Maybe (LHsContext RdrName), LHsType RdrName) }
+ : context '=>' type { LL (Just $1, $3) }
+ | type { L1 (Nothing, $1) }
-----------------------------------------------------------------------------
-- Stand-alone deriving
binds :: { Located (HsLocalBinds RdrName) } -- May have implicit parameters
-- No type declarations
: decllist { L1 (HsValBinds (cvBindGroup (unLoc $1))) }
- | '{' dbinds '}' { LL (HsIPBinds (IPBinds (unLoc $2) emptyLHsBinds)) }
- | vocurly dbinds close { L (getLoc $2) (HsIPBinds (IPBinds (unLoc $2) emptyLHsBinds)) }
+ | '{' dbinds '}' { LL (HsIPBinds (IPBinds (unLoc $2) emptyTcEvBinds)) }
+ | vocurly dbinds close { L (getLoc $2) (HsIPBinds (IPBinds (unLoc $2) emptyTcEvBinds)) }
wherebinds :: { Located (HsLocalBinds RdrName) } -- May have implicit parameters
-- No type declarations
safety :: { Safety }
: 'unsafe' { PlayRisky }
| 'safe' { PlaySafe False }
+ | 'interruptible' { PlayInterruptible }
| 'threadsafe' { PlaySafe True } -- deprecated alias
fspec :: { Located (Located FastString, Located RdrName, LHsType RdrName) }
strict_mark :: { Located HsBang }
: '!' { L1 HsStrict }
- | '{-# UNPACK' '#-}' '!' { LL HsUnbox }
+ | '{-# UNPACK' '#-}' '!' { LL HsUnpack }
-- A ctype is a for-all type
ctype :: { LHsType RdrName }
| '[:' ctype ':]' { LL $ HsPArrTy $2 }
| '(' ctype ')' { LL $ HsParTy $2 }
| '(' ctype '::' kind ')' { LL $ HsKindSig $2 (unLoc $4) }
- | '$(' exp ')' { LL $ HsSpliceTy (mkHsSplice $2 ) }
- | TH_ID_SPLICE { LL $ HsSpliceTy (mkHsSplice
- (L1 $ HsVar (mkUnqual varName
- (getTH_ID_SPLICE $1)))) } -- $x
+ | quasiquote { L1 (HsQuasiQuoteTy (unLoc $1)) }
+ | '$(' exp ')' { LL $ mkHsSpliceTy $2 }
+ | TH_ID_SPLICE { LL $ mkHsSpliceTy $ L1 $ HsVar $
+ mkUnqual varName (getTH_ID_SPLICE $1) }
-- Generics
| INTEGER { L1 (HsNumTy (getINTEGER $1)) }
| {- empty -} { [] }
tv_bndr :: { LHsTyVarBndr RdrName }
- : tyvar { L1 (UserTyVar (unLoc $1)) }
+ : tyvar { L1 (UserTyVar (unLoc $1) placeHolderKind) }
| '(' tyvar '::' kind ')' { LL (KindedTyVar (unLoc $2)
(unLoc $4)) }
| docsection { L1 (case (unLoc $1) of (n, doc) -> DocGroup n doc) }
decl :: { Located (OrdList (LHsDecl RdrName)) }
- : sigdecl { $1 }
- | '!' aexp rhs {% do { pat <- checkPattern $2;
- return (LL $ unitOL $ LL $ ValD (
- PatBind (LL $ BangPat pat) (unLoc $3)
- placeHolderType placeHolderNames)) } }
- | infixexp opt_sig rhs {% do { r <- checkValDef $1 $2 $3;
- let { l = comb2 $1 $> };
- return $! (sL l (unitOL $! (sL l $ ValD r))) } }
- | docdecl { LL $ unitOL $1 }
+ : sigdecl { $1 }
+
+ | '!' aexp rhs {% do { let { e = LL (SectionR (LL (HsVar bang_RDR)) $2) };
+ pat <- checkPattern e;
+ return $ LL $ unitOL $ LL $ ValD $
+ PatBind pat (unLoc $3)
+ placeHolderType placeHolderNames } }
+ -- Turn it all into an expression so that
+ -- checkPattern can check that bangs are enabled
+
+ | infixexp opt_sig rhs {% do { r <- checkValDef $1 $2 $3;
+ let { l = comb2 $1 $> };
+ return $! (sL l (unitOL $! (sL l $ ValD r))) } }
+ | docdecl { LL $ unitOL $1 }
rhs :: { Located (GRHSs RdrName) }
: '=' exp wherebinds { sL (comb3 $1 $2 $3) $ GRHSs (unguardedRHS $2) (unLoc $3) }
| infix prec ops { LL $ toOL [ LL $ SigD (FixSig (FixitySig n (Fixity $2 (unLoc $1))))
| n <- unLoc $3 ] }
| '{-# INLINE' activation qvar '#-}'
- { LL $ unitOL (LL $ SigD (InlineSig $3 (mkInlinePragma $2 FunLike (getINLINE $1)))) }
- | '{-# INLINE_CONLIKE' activation qvar '#-}'
- { LL $ unitOL (LL $ SigD (InlineSig $3 (mkInlinePragma $2 ConLike (getINLINE_CONLIKE $1)))) }
+ { LL $ unitOL (LL $ SigD (InlineSig $3 (mkInlinePragma (getINLINE $1) $2))) }
| '{-# SPECIALISE' qvar '::' sigtypes1 '#-}'
{ LL $ toOL [ LL $ SigD (SpecSig $2 t defaultInlinePragma)
| t <- $4] }
| '{-# SPECIALISE_INLINE' activation qvar '::' sigtypes1 '#-}'
- { LL $ toOL [ LL $ SigD (SpecSig $3 t (mkInlinePragma $2 FunLike (getSPEC_INLINE $1)))
+ { LL $ toOL [ LL $ SigD (SpecSig $3 t (mkInlinePragma (getSPEC_INLINE $1) $2))
| t <- $5] }
| '{-# SPECIALISE' 'instance' inst_type '#-}'
{ LL $ unitOL (LL $ SigD (SpecInstSig $3)) }
-----------------------------------------------------------------------------
-- Expressions
+quasiquote :: { Located (HsQuasiQuote RdrName) }
+ : TH_QUASIQUOTE { let { loc = getLoc $1
+ ; ITquasiQuote (quoter, quote, quoteSpan) = unLoc $1
+ ; quoterId = mkUnqual varName quoter }
+ in L1 (mkHsQuasiQuote quoterId quoteSpan quote) }
+
exp :: { LHsExpr RdrName }
: infixexp '::' sigtype { LL $ ExprWithTySig $1 $3 }
| infixexp '-<' exp { LL $ HsArrApp $1 $3 placeHolderType HsFirstOrderApp True }
(unguardedGRHSs $6)
]) }
| 'let' binds 'in' exp { LL $ HsLet (unLoc $2) $4 }
- | 'if' exp 'then' exp 'else' exp { LL $ HsIf $2 $4 $6 }
+ | 'if' exp optSemi 'then' exp optSemi 'else' exp
+ {% checkDoAndIfThenElse $2 $3 $5 $6 $8 >>
+ return (LL $ mkHsIf $2 $5 $8) }
| 'case' exp 'of' altslist { LL $ HsCase $2 (mkMatchGroup (unLoc $4)) }
| '-' fexp { LL $ NegApp $2 noSyntaxExpr }
-- hdaume: core annotation
| fexp { $1 }
+optSemi :: { Bool }
+ : ';' { True }
+ | {- empty -} { False }
+
scc_annot :: { Located FastString }
: '_scc_' STRING {% (addWarning Opt_WarnWarningsDeprecations (getLoc $1) (text "_scc_ is deprecated; use an SCC pragma instead")) >>= \_ ->
( do scc <- getSCC $2; return $ LL scc ) }
| RATIONAL { sL (getLoc $1) (HsOverLit $! mkHsFractional (getRATIONAL $1) placeHolderType) }
-- N.B.: sections get parsed by these next two productions.
- -- This allows you to write, e.g., '(+ 3, 4 -)', which isn't correct Haskell98
- -- (you'd have to write '((+ 3), (4 -))')
+ -- This allows you to write, e.g., '(+ 3, 4 -)', which isn't
+ -- correct Haskell (you'd have to write '((+ 3), (4 -))')
-- but the less cluttered version fell out of having texps.
| '(' texp ')' { LL (HsPar $2) }
| '(' tup_exprs ')' { LL (ExplicitTuple $2 Boxed) }
-- Template Haskell Extension
| TH_ID_SPLICE { L1 $ HsSpliceE (mkHsSplice
(L1 $ HsVar (mkUnqual varName
- (getTH_ID_SPLICE $1)))) } -- $x
- | '$(' exp ')' { LL $ HsSpliceE (mkHsSplice $2) } -- $( exp )
-
- | TH_QUASIQUOTE { let { loc = getLoc $1
- ; ITquasiQuote (quoter, quote, quoteSpan) = unLoc $1
- ; quoterId = mkUnqual varName quoter
- }
- in sL loc $ HsQuasiQuoteE (mkHsQuasiQuote quoterId quoteSpan quote) }
+ (getTH_ID_SPLICE $1)))) }
+ | '$(' exp ')' { LL $ HsSpliceE (mkHsSplice $2) }
+
+
| TH_VAR_QUOTE qvar { LL $ HsBracket (VarBr (unLoc $2)) }
| TH_VAR_QUOTE qcon { LL $ HsBracket (VarBr (unLoc $2)) }
| TH_TY_QUOTE tyvar { LL $ HsBracket (VarBr (unLoc $2)) }
| '[t|' ctype '|]' { LL $ HsBracket (TypBr $2) }
| '[p|' infixexp '|]' {% checkPattern $2 >>= \p ->
return (LL $ HsBracket (PatBr p)) }
- | '[d|' cvtopbody '|]' {% checkDecBrGroup $2 >>= \g ->
- return (LL $ HsBracket (DecBr g)) }
+ | '[d|' cvtopbody '|]' { LL $ HsBracket (DecBrL $2) }
+ | quasiquote { L1 (HsQuasiQuoteE (unLoc $1)) }
-- arrow notation extension
| '(|' aexp2 cmdargs '|)' { LL $ HsArrForm $2 Nothing (reverse $3) }
-- Note [Parsing sections]
-- ~~~~~~~~~~~~~~~~~~~~~~~
-- We include left and right sections here, which isn't
- -- technically right according to Haskell 98. For example
- -- (3 +, True) isn't legal
+ -- technically right according to the Haskell standard.
+ -- For example (3 +, True) isn't legal.
-- However, we want to parse bang patterns like
-- (!x, !y)
-- and it's convenient to do so here as a section
| qopm infixexp { LL $ SectionR $1 $2 }
-- View patterns get parenthesized above
- | exp '->' exp { LL $ EViewPat $1 $3 }
+ | exp '->' texp { LL $ EViewPat $1 $3 }
-- Always at least one comma
tup_exprs :: { [HsTupArg RdrName] }
| '..' { ([], True) }
fbind :: { HsRecField RdrName (LHsExpr RdrName) }
- : qvar '=' exp { HsRecField $1 $3 False }
- | qvar { HsRecField $1 (L (getLoc $1) placeHolderPunRhs) True }
- -- Here's where we say that plain 'x'
- -- means exactly 'x = x'. The pun-flag boolean is
- -- there so we can still print it right
+ : qvar '=' exp { HsRecField $1 $3 False }
+ | qvar { HsRecField $1 placeHolderPunRhs True }
+ -- In the punning case, use a place-holder
+ -- The renamer fills in the final value
-----------------------------------------------------------------------------
-- Implicit Parameter Bindings
| special_id { L1 $! mkUnqual tvName (unLoc $1) }
| 'unsafe' { L1 $! mkUnqual tvName (fsLit "unsafe") }
| 'safe' { L1 $! mkUnqual tvName (fsLit "safe") }
+ | 'interruptible' { L1 $! mkUnqual tvName (fsLit "interruptible") }
| 'threadsafe' { L1 $! mkUnqual tvName (fsLit "threadsafe") }
tyvarsym :: { Located RdrName }
| special_id { L1 $! mkUnqual varName (unLoc $1) }
| 'unsafe' { L1 $! mkUnqual varName (fsLit "unsafe") }
| 'safe' { L1 $! mkUnqual varName (fsLit "safe") }
+ | 'interruptible' { L1 $! mkUnqual varName (fsLit "interruptible") }
| 'threadsafe' { L1 $! mkUnqual varName (fsLit "threadsafe") }
| 'forall' { L1 $! mkUnqual varName (fsLit "forall") }
| 'family' { L1 $! mkUnqual varName (fsLit "family") }
-- These special_ids are treated as keywords in various places,
-- but as ordinary ids elsewhere. 'special_id' collects all these
--- except 'unsafe', 'forall', and 'family' whose treatment differs
+-- except 'unsafe', 'interruptible', 'forall', and 'family' whose treatment differs
-- depending on context
special_id :: { Located FastString }
special_id
getPRIMFLOAT (L _ (ITprimfloat x)) = x
getPRIMDOUBLE (L _ (ITprimdouble x)) = x
getTH_ID_SPLICE (L _ (ITidEscape x)) = x
-getINLINE (L _ (ITinline_prag b)) = b
-getINLINE_CONLIKE (L _ (ITinline_conlike_prag b)) = b
-getSPEC_INLINE (L _ (ITspec_inline_prag b)) = b
+getINLINE (L _ (ITinline_prag inl conl)) = (inl,conl)
+getSPEC_INLINE (L _ (ITspec_inline_prag True)) = (Inline, FunLike)
+getSPEC_INLINE (L _ (ITspec_inline_prag False)) = (NoInline,FunLike)
getDOCNEXT (L _ (ITdocCommentNext x)) = x
getDOCPREV (L _ (ITdocCommentPrev x)) = x
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