-- ---------------------------------------------------------------------------
{
-{-# OPTIONS -Wwarn -w #-}
+{-# OPTIONS -Wwarn -w -XNoMonomorphismRestriction #-}
+-- The NoMonomorphismRestriction deals with a Happy infelicity
+-- With OutsideIn's more conservativ monomorphism restriction
+-- we aren't generalising
+-- notHappyAtAll = error "urk"
+-- which is terrible. Switching off the restriction allows
+-- the generalisation. Better would be to make Happy generate
+-- an appropriate signature.
+
-- The above warning supression flag is a temporary kludge.
-- While working on this module you are encouraged to remove it and fix
-- any warnings in the module. See
-- (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
strict_mark :: { Located HsBang }
: '!' { L1 HsStrict }
- | '{-# UNPACK' '#-}' '!' { LL HsUnbox }
+ | '{-# UNPACK' '#-}' '!' { LL HsUnpack }
-- A ctype is a for-all type
ctype :: { LHsType RdrName }
(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 $ HsIf $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 ) }