{- -*-haskell-*-
-----------------------------------------------------------------------------
-$Id: Parser.y,v 1.88 2002/02/13 14:05:51 simonpj Exp $
+$Id: Parser.y,v 1.95 2002/04/02 13:56:32 simonmar Exp $
Haskell grammar.
-}
{
-module Parser ( parseModule, parseStmt, parseIdentifier ) where
+module Parser ( parseModule, parseStmt, parseIdentifier, parseIface ) where
import HsSyn
import HsTypes ( mkHsTupCon )
import RdrHsSyn
+import RnMonad ( ParsedIface(..) )
import Lex
import ParseUtil
import RdrName
CCallConv(..), CCallTarget(..), defaultCCallConv,
)
import OccName ( UserFS, varName, tcName, dataName, tcClsName, tvName )
+import TyCon ( DataConDetails(..) )
import SrcLoc ( SrcLoc )
import Module
-import CmdLineOpts ( opt_SccProfilingOn )
+import CmdLineOpts ( opt_SccProfilingOn, opt_InPackage )
import Type ( Kind, mkArrowKind, liftedTypeKind )
import BasicTypes ( Boxity(..), Fixity(..), FixityDirection(..), IPName(..),
NewOrData(..), StrictnessMark(..), Activation(..) )
(don't know whether to reduce 'a' as a btype or shift the '->'.
conclusion: bogus expression anyway, doesn't matter)
+1 for ambiguity in '{-# RULES "name" [ ... #-}
+ we don't know whether the '[' starts the activation or not: it
+ might be the start of the declaration with the activation being
+ empty. --SDM 1/4/2002
+
1 for ambiguity in '{-# RULES "name" forall = ... #-}'
since 'forall' is a valid variable name, we don't know whether
to treat a forall on the input as the beginning of a quantifier
This saves explicitly defining a grammar for the rule lhs that
doesn't include 'forall'.
-1 for ambiguity in 'x @ Rec{..}'.
- Only sensible parse is 'x @ (Rec{..})', which is what resolving
- to shift gives us.
+1 for ambiguity in 'let ?x ...'
+ the parser can't tell whether the ?x is the lhs of a normal binding or
+ an implicit binding. Fortunately resolving as shift gives it the only
+ sensible meaning, namely the lhs of an implicit binding.
6 for conflicts between `fdecl' and `fdeclDEPRECATED', which are resolved
correctly, and moreover, should go away when `fdeclDEPRECATED' is removed.
'label' { ITlabel }
'dynamic' { ITdynamic }
'safe' { ITsafe }
+ 'threadsafe' { ITthreadsafe }
'unsafe' { ITunsafe }
'with' { ITwith }
'stdcall' { ITstdcallconv }
'ccall' { ITccallconv }
'dotnet' { ITdotnet }
'_ccall_' { ITccall (False, False, PlayRisky) }
- '_ccall_GC_' { ITccall (False, False, PlaySafe) }
+ '_ccall_GC_' { ITccall (False, False, PlaySafe False) }
'_casm_' { ITccall (False, True, PlayRisky) }
- '_casm_GC_' { ITccall (False, True, PlaySafe) }
+ '_casm_GC_' { ITccall (False, True, PlaySafe False) }
'{-# SPECIALISE' { ITspecialise_prag }
'{-# SOURCE' { ITsource_prag }
%name parseModule module
%name parseStmt maybe_stmt
%name parseIdentifier identifier
+%name parseIface iface
%tokentype { Token }
%%
: topdecls { cvTopDecls (groupBindings $1)}
-----------------------------------------------------------------------------
+-- Interfaces (.hi-boot files)
+
+iface :: { ParsedIface }
+ : 'module' modid 'where' ifacebody
+ { ParsedIface {
+ pi_mod = $2,
+ pi_pkg = opt_InPackage,
+ pi_vers = 1, -- Module version
+ pi_orphan = False,
+ pi_exports = (1,[($2,mkIfaceExports $4)]),
+ pi_usages = [],
+ pi_fixity = [],
+ pi_insts = [],
+ pi_decls = map (\x -> (1,x)) $4,
+ pi_rules = (1,[]),
+ pi_deprecs = Nothing
+ }
+ }
+
+ifacebody :: { [RdrNameTyClDecl] }
+ : '{' ifacedecls '}' { $2 }
+ | layout_on ifacedecls close { $2 }
+
+ifacedecls :: { [RdrNameTyClDecl] }
+ : ifacedecl ';' ifacedecls { $1 : $3 }
+ | ';' ifacedecls { $2 }
+ | ifacedecl { [$1] }
+ | {- empty -} { [] }
+
+ifacedecl :: { RdrNameTyClDecl }
+ : srcloc 'data' tycl_hdr constrs
+ { mkTyData DataType $3 (DataCons (reverse $4)) Nothing $1 }
+
+ | srcloc 'newtype' tycl_hdr '=' newconstr
+ { mkTyData NewType $3 (DataCons [$5]) Nothing $1 }
+
+ | srcloc 'class' tycl_hdr fds where
+ { let
+ (binds,sigs) = cvMonoBindsAndSigs cvClassOpSig
+ (groupBindings $5)
+ in
+ mkClassDecl $3 $4 sigs (Just binds) $1 }
+
+ | srcloc 'type' tycon tv_bndrs '=' ctype
+ { TySynonym $3 $4 $6 $1 }
+
+ | srcloc var '::' sigtype
+ { IfaceSig $2 $4 [] $1 }
+
+-----------------------------------------------------------------------------
-- The Export List
maybeexports :: { Maybe [RdrNameIE] }
| srcloc 'data' tycl_hdr constrs deriving
{% returnP (RdrHsDecl (TyClD
- (mkTyData DataType $3 (reverse $4) (length $4) $5 $1))) }
+ (mkTyData DataType $3 (DataCons (reverse $4)) $5 $1))) }
| srcloc 'newtype' tycl_hdr '=' newconstr deriving
{% returnP (RdrHsDecl (TyClD
- (mkTyData NewType $3 [$5] 1 $6 $1))) }
+ (mkTyData NewType $3 (DataCons [$5]) $6 $1))) }
| srcloc 'class' tycl_hdr fds where
{% let
-- (Eq a, Ord b) => T a b
-- Rather a lot of inlining here, else we get reduce/reduce errors
tycl_hdr :: { (RdrNameContext, RdrName, [RdrNameHsTyVar]) }
- : '(' comma_types1 ')' '=>' gtycon tv_bndrs {% mapP checkPred $2 `thenP` \ cxt ->
- returnP (cxt, $5, $6) }
+ : '(' comma_types1 ')' '=>' gtycon tv_bndrs
+ {% mapP checkPred $2 `thenP` \ cxt ->
+ returnP (cxt, $5, $6) }
+
+ | '(' ')' '=>' gtycon tv_bndrs
+ { ([], $4, $5) }
+
-- qtycon for the class below name would lead to many s/r conflicts
-- FIXME: does the renamer pick up all wrong forms and raise an
-- error
- | gtycon atypes1 '=>' gtycon atypes0 {% checkTyVars $5 `thenP` \ tvs ->
- returnP ([HsClassP $1 $2], $4, tvs) }
- | gtycon atypes0 {% checkTyVars $2 `thenP` \ tvs ->
- returnP ([], $1, tvs) }
+ | gtycon atypes1 '=>' gtycon atypes0
+ {% checkTyVars $5 `thenP` \ tvs ->
+ returnP ([HsClassP $1 $2], $4, tvs) }
+
+ | gtycon atypes0
+ {% checkTyVars $2 `thenP` \ tvs ->
+ returnP ([], $1, tvs) }
-- We have to have qtycon in this production to avoid s/r
-- conflicts with the previous one. The renamer will complain
-- if we use a qualified tycon.
: '{' decls '}' { $2 }
| layout_on decls close { $2 }
+letbinds :: { RdrNameHsExpr -> RdrNameHsExpr }
+ : decllist { HsLet (cvBinds cvValSig (groupBindings $1)) }
+ | '{' dbinds '}' { \e -> HsWith e $2 False{-not with-} }
+ | layout_on dbinds close { \e -> HsWith e $2 False{-not with-} }
+
fixdecl :: { RdrBinding }
: srcloc infix prec ops { foldr1 RdrAndBindings
[ RdrSig (FixSig (FixitySig n
--
fdecl :: { RdrNameHsDecl }
fdecl : srcloc 'import' callconv safety1 fspec {% mkImport $3 $4 $5 $1 }
- | srcloc 'import' callconv fspec {% mkImport $3 PlaySafe $4 $1 }
+ | srcloc 'import' callconv fspec {% mkImport $3 (PlaySafe False) $4 $1 }
| srcloc 'export' callconv fspec {% mkExport $3 $4 $1 }
-- the following syntax is DEPRECATED
| srcloc fdecl1DEPRECATED { ForD ($2 True $1) }
fdecl1DEPRECATED
----------- DEPRECATED label decls ------------
: 'label' ext_name varid '::' sigtype
- { ForeignImport $3 $5 (CImport defaultCCallConv PlaySafe _NIL_ _NIL_
+ { ForeignImport $3 $5 (CImport defaultCCallConv (PlaySafe False) _NIL_ _NIL_
(CLabel ($2 `orElse` mkExtName $3))) }
----------- DEPRECATED ccall/stdcall decls ------------
-- DEPRECATED variant #8: use of the special identifier `dynamic' without
-- an explicit calling convention (export)
| 'export' {-no callconv-} 'dynamic' varid '::' sigtype
- { ForeignImport $3 $5 (CImport defaultCCallConv PlaySafe _NIL_ _NIL_
+ { ForeignImport $3 $5 (CImport defaultCCallConv (PlaySafe False) _NIL_ _NIL_
CWrapper) }
-- DEPRECATED variant #9: use of the special identifier `dynamic' (export)
{% case $2 of
DNCall -> parseError "Illegal format of .NET foreign import"
CCall cconv -> returnP $
- ForeignImport $4 $6 (CImport cconv PlaySafe _NIL_ _NIL_ CWrapper) }
+ ForeignImport $4 $6 (CImport cconv (PlaySafe False) _NIL_ _NIL_ CWrapper) }
----------- DEPRECATED .NET decls ------------
-- NB: removed the .NET call declaration, as it is entirely subsumed
safety :: { Safety }
: 'unsafe' { PlayRisky }
- | 'safe' { PlaySafe }
- | {- empty -} { PlaySafe }
+ | 'safe' { PlaySafe False }
+ | 'threadsafe' { PlaySafe True }
+ | {- empty -} { PlaySafe False }
safety1 :: { Safety }
: 'unsafe' { PlayRisky }
- | 'safe' { PlaySafe }
+ | 'safe' { PlaySafe False }
+ | 'threadsafe' { PlaySafe True }
-- only needed to avoid conflicts with the DEPRECATED rules
fspec :: { (FAST_STRING, RdrName, RdrNameHsType) }
exp :: { RdrNameHsExpr }
: infixexp '::' sigtype { (ExprWithTySig $1 $3) }
- | infixexp 'with' dbinding { HsWith $1 $3 }
+ | infixexp 'with' dbinding { HsWith $1 $3 True{-not a let-} }
| infixexp { $1 }
infixexp :: { RdrNameHsExpr }
returnP (HsLam (Match ps $5
(GRHSs (unguardedRHS $8 $7)
EmptyBinds placeHolderType))) }
- | 'let' declbinds 'in' exp { HsLet $2 $4 }
+ | 'let' letbinds 'in' exp { $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 }
returnP (HsDo DoExpr stmts $1) }
| '_ccall_' ccallid aexps0 { HsCCall $2 $3 PlayRisky False placeHolderType }
- | '_ccall_GC_' ccallid aexps0 { HsCCall $2 $3 PlaySafe 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 True placeHolderType }
+ | '_casm_GC_' CLITLIT aexps0 { HsCCall $2 $3 (PlaySafe False) True placeHolderType }
| scc_annot exp { if opt_SccProfilingOn
then HsSCC $1 $2
| {- empty -} { [] }
aexp :: { RdrNameHsExpr }
+ : qvar '@' aexp { EAsPat $1 $3 }
+ | '~' aexp { ELazyPat $2 }
+ | aexp1 { $1 }
+
+aexp1 :: { RdrNameHsExpr }
: var_or_con '{|' gentype '|}' { (HsApp $1 (HsType $3)) }
- | aexp '{' fbinds '}' {% (mkRecConstrOrUpdate $1
+ | aexp1 '{' fbinds '}' {% (mkRecConstrOrUpdate $1
(reverse $3)) }
- | aexp1 { $1 }
+ | aexp2 { $1 }
var_or_con :: { RdrNameHsExpr }
: qvar { HsVar $1 }
| gcon { HsVar $1 }
-aexp1 :: { RdrNameHsExpr }
+aexp2 :: { RdrNameHsExpr }
: ipvar { HsIPVar $1 }
| var_or_con { $1 }
| literal { HsLit $1 }
| '[:' parr ':]' { $2 }
| '(' infixexp qop ')' { (SectionL $2 (HsVar $3)) }
| '(' qopm infixexp ')' { (SectionR $2 $3) }
- | qvar '@' aexp { EAsPat $1 $3 }
| '_' { EWildPat }
- | '~' aexp1 { ELazyPat $2 }
texps :: { [RdrNameHsExpr] }
: texps ',' exp { $3 : $1 }
: dbinds ';' dbind { $3 : $1 }
| dbinds ';' { $1 }
| dbind { [$1] }
- | {- empty -} { [] }
+-- | {- empty -} { [] }
dbind :: { (IPName RdrName, RdrNameHsExpr) }
dbind : ipvar '=' exp { ($1, $3) }
varid :: { RdrName }
: varid_no_unsafe { $1 }
- | 'unsafe' { mkUnqual varName SLIT("unsafe") }
+ | 'unsafe' { mkUnqual varName FSLIT("unsafe") }
+ | 'safe' { mkUnqual varName FSLIT("safe") }
+ | 'threadsafe' { mkUnqual varName FSLIT("threadsafe") }
varid_no_unsafe :: { RdrName }
: VARID { mkUnqual varName $1 }
| special_id { mkUnqual varName $1 }
- | 'forall' { mkUnqual varName SLIT("forall") }
+ | 'forall' { mkUnqual varName FSLIT("forall") }
tyvar :: { RdrName }
: VARID { mkUnqual tvName $1 }
| special_id { mkUnqual tvName $1 }
- | 'unsafe' { mkUnqual tvName SLIT("unsafe") }
+ | 'unsafe' { mkUnqual tvName FSLIT("unsafe") }
+ | 'safe' { mkUnqual tvName FSLIT("safe") }
+ | 'threadsafe' { mkUnqual tvName FSLIT("threadsafe") }
-- These special_ids are treated as keywords in various places,
--- but as ordinary ids elsewhere. A special_id collects all thsee
+-- but as ordinary ids elsewhere. 'special_id' collects all these
-- except 'unsafe' and 'forall' whose treatment differs depending on context
special_id :: { UserFS }
special_id
- : 'as' { SLIT("as") }
- | 'qualified' { SLIT("qualified") }
- | 'hiding' { SLIT("hiding") }
- | 'export' { SLIT("export") }
- | 'label' { SLIT("label") }
- | 'dynamic' { SLIT("dynamic") }
- | 'stdcall' { SLIT("stdcall") }
- | 'ccall' { SLIT("ccall") }
+ : 'as' { FSLIT("as") }
+ | 'qualified' { FSLIT("qualified") }
+ | 'hiding' { FSLIT("hiding") }
+ | 'export' { FSLIT("export") }
+ | 'label' { FSLIT("label") }
+ | 'dynamic' { FSLIT("dynamic") }
+ | 'stdcall' { FSLIT("stdcall") }
+ | 'ccall' { FSLIT("ccall") }
-----------------------------------------------------------------------------
-- ConIds
varsym :: { RdrName }
: varsym_no_minus { $1 }
- | '-' { mkUnqual varName SLIT("-") }
+ | '-' { mkUnqual varName FSLIT("-") }
varsym_no_minus :: { RdrName } -- varsym not including '-'
: VARSYM { mkUnqual varName $1 }
-- See comments with special_id
special_sym :: { UserFS }
-special_sym : '!' { SLIT("!") }
- | '.' { SLIT(".") }
- | '*' { SLIT("*") }
+special_sym : '!' { FSLIT("!") }
+ | '.' { FSLIT(".") }
+ | '*' { FSLIT("*") }
-----------------------------------------------------------------------------
-- Literals
projects / ghc-hetmet.git / blobdiff