{
-- XXX The above flags turn off warnings in the generated code:
+{-# LANGUAGE BangPatterns #-}
{-# OPTIONS_GHC -fno-warn-unused-matches #-}
{-# OPTIONS_GHC -fno-warn-unused-binds #-}
{-# OPTIONS_GHC -fno-warn-unused-imports #-}
failLocMsgP, failSpanMsgP, srcParseFail,
getMessages,
popContext, pushCurrentContext, setLastToken, setSrcLoc,
+ activeContext, nextIsEOF,
getLexState, popLexState, pushLexState,
extension, bangPatEnabled, datatypeContextsEnabled,
addWarning,
-- context if the curly brace is missing.
-- Careful! This stuff is quite delicate.
<layout, layout_do> {
- \{ / { notFollowedBy '-' } { pop_and open_brace }
+ \{ / { notFollowedBy '-' } { hopefully_open_brace }
-- we might encounter {-# here, but {- has been handled already
\n ;
^\# (line)? { begin line_prag1 }
\$ @varid / { ifExtension thEnabled } { skip_one_varid ITidEscape }
"$(" / { ifExtension thEnabled } { token ITparenEscape }
+-- For backward compatibility, accept the old dollar syntax
+ "[$" @varid "|" / { ifExtension qqEnabled }
+ { lex_quasiquote_tok }
+
"[" @varid "|" / { ifExtension qqEnabled }
{ lex_quasiquote_tok }
}
-- ToDo: - move `var` and (sym) into lexical syntax?
-- - remove backquote from $special?
<0> {
- @qual @varsym / { ifExtension oldQualOps } { idtoken qvarsym }
- @qual @consym / { ifExtension oldQualOps } { idtoken qconsym }
- @qual \( @varsym \) / { ifExtension newQualOps } { idtoken prefixqvarsym }
- @qual \( @consym \) / { ifExtension newQualOps } { idtoken prefixqconsym }
+ @qual @varsym { idtoken qvarsym }
+ @qual @consym { idtoken qconsym }
@varsym { varsym }
@consym { consym }
}
| IToptions_prag String
| ITinclude_prag String
| ITlanguage_prag
+ | ITvect_prag
+ | ITvect_scalar_prag
| ITdotdot -- reserved symbols
| ITcolon
| ITvocurly
| ITvccurly
| ITobrack
- | ITopabrack -- [:, for parallel arrays with -XParr
- | ITcpabrack -- :], for parallel arrays with -XParr
+ | ITopabrack -- [:, for parallel arrays with -XParallelArrays
+ | ITcpabrack -- :], for parallel arrays with -XParallelArrays
| ITcbrack
| IToparen
| ITcparen
pop _span _buf _len = do _ <- popLexState
lexToken
+hopefully_open_brace :: Action
+hopefully_open_brace span buf len
+ = do relaxed <- extension relaxedLayout
+ ctx <- getContext
+ (AI l _) <- getInput
+ let offset = srcLocCol l
+ isOK = relaxed ||
+ case ctx of
+ Layout prev_off : _ -> prev_off < offset
+ _ -> True
+ if isOK then pop_and open_brace span buf len
+ else failSpanMsgP span (text "Missing block")
+
pop_and :: Action -> Action
pop_and act span buf len = do _ <- popLexState
act span buf len
(AI l _) <- getInput
let offset = srcLocCol l
ctx <- getContext
+ nondecreasing <- extension nondecreasingIndentation
+ let strict' = strict || not nondecreasing
case ctx of
Layout prev_off : _ |
- (strict && prev_off >= offset ||
- not strict && prev_off > offset) -> do
+ (strict' && prev_off >= offset ||
+ not strict' && prev_off > offset) -> do
-- token is indented to the left of the previous context.
-- we must generate a {} sequence now.
pushLexState layout_left
EnclosingMark -> other_graphic
DecimalNumber -> digit
LetterNumber -> other_graphic
- OtherNumber -> other_graphic
+ OtherNumber -> digit -- see #4373
ConnectorPunctuation -> symbol
DashPunctuation -> symbol
OpenPunctuation -> other_graphic
setInput :: AlexInput -> P ()
setInput (AI l b) = P $ \s -> POk s{ loc=l, buffer=b } ()
+nextIsEOF :: P Bool
+nextIsEOF = do
+ AI _ s <- getInput
+ return $ atEnd s
+
pushLexState :: Int -> P ()
pushLexState ls = P $ \s@PState{ lex_state=l } -> POk s{lex_state=ls:l} ()
= P $ \s@PState{ alr_next_token = m } ->
POk (s {alr_next_token = Nothing}) m
+activeContext :: P Bool
+activeContext = do
+ ctxt <- getALRContext
+ expc <- getAlrExpectingOCurly
+ impt <- implicitTokenPending
+ case (ctxt,expc) of
+ ([],Nothing) -> return impt
+ _other -> return True
+
setAlrLastLoc :: SrcSpan -> P ()
setAlrLastLoc l = P $ \s -> POk (s {alr_last_loc = l}) ()
setNextToken :: Located Token -> P ()
setNextToken t = P $ \s -> POk (s {alr_next_token = Just t}) ()
+implicitTokenPending :: P Bool
+implicitTokenPending
+ = P $ \s@PState{ alr_pending_implicit_tokens = ts } ->
+ case ts of
+ [] -> POk s False
+ _ -> POk s True
+
popPendingImplicitToken :: P (Maybe (Located Token))
popPendingImplicitToken
= P $ \s@PState{ alr_pending_implicit_tokens = ts } ->
setAlrExpectingOCurly b = P $ \s -> POk (s {alr_expecting_ocurly = b}) ()
-- for reasons of efficiency, flags indicating language extensions (eg,
--- -fglasgow-exts or -XParr) are represented by a bitmap stored in an unboxed
+-- -fglasgow-exts or -XParallelArrays) are represented by a bitmap stored in an unboxed
-- integer
genericsBit :: Int
inRulePragBit = 19
rawTokenStreamBit :: Int
rawTokenStreamBit = 20 -- producing a token stream with all comments included
-newQualOpsBit :: Int
-newQualOpsBit = 21 -- Haskell' qualified operator syntax, e.g. Prelude.(+)
recBit :: Int
recBit = 22 -- rec
alternativeLayoutRuleBit :: Int
alternativeLayoutRuleBit = 23
+relaxedLayoutBit :: Int
+relaxedLayoutBit = 24
+nondecreasingIndentationBit :: Int
+nondecreasingIndentationBit = 25
always :: Int -> Bool
always _ = True
-- inRulePrag flags = testBit flags inRulePragBit
rawTokenStreamEnabled :: Int -> Bool
rawTokenStreamEnabled flags = testBit flags rawTokenStreamBit
-newQualOps :: Int -> Bool
-newQualOps flags = testBit flags newQualOpsBit
-oldQualOps :: Int -> Bool
-oldQualOps flags = not (newQualOps flags)
alternativeLayoutRule :: Int -> Bool
alternativeLayoutRule flags = testBit flags alternativeLayoutRuleBit
+relaxedLayout :: Int -> Bool
+relaxedLayout flags = testBit flags relaxedLayoutBit
+nondecreasingIndentation :: Int -> Bool
+nondecreasingIndentation flags = testBit flags nondecreasingIndentationBit
-- PState for parsing options pragmas
--
mkPState :: DynFlags -> StringBuffer -> SrcLoc -> PState
mkPState flags buf loc =
PState {
- buffer = buf,
+ buffer = buf,
dflags = flags,
messages = emptyMessages,
last_loc = mkSrcSpan loc loc,
alr_justClosedExplicitLetBlock = False
}
where
- bitmap = genericsBit `setBitIf` xopt Opt_Generics flags
- .|. ffiBit `setBitIf` xopt Opt_ForeignFunctionInterface flags
- .|. parrBit `setBitIf` xopt Opt_PArr flags
- .|. arrowsBit `setBitIf` xopt Opt_Arrows flags
- .|. thBit `setBitIf` xopt Opt_TemplateHaskell flags
- .|. qqBit `setBitIf` xopt Opt_QuasiQuotes flags
- .|. ipBit `setBitIf` xopt Opt_ImplicitParams flags
- .|. explicitForallBit `setBitIf` xopt Opt_ExplicitForAll flags
- .|. bangPatBit `setBitIf` xopt Opt_BangPatterns flags
- .|. tyFamBit `setBitIf` xopt Opt_TypeFamilies flags
- .|. haddockBit `setBitIf` dopt Opt_Haddock flags
- .|. magicHashBit `setBitIf` xopt Opt_MagicHash flags
- .|. kindSigsBit `setBitIf` xopt Opt_KindSignatures flags
- .|. recursiveDoBit `setBitIf` xopt Opt_RecursiveDo flags
- .|. recBit `setBitIf` xopt Opt_DoRec flags
- .|. recBit `setBitIf` xopt Opt_Arrows flags
- .|. unicodeSyntaxBit `setBitIf` xopt Opt_UnicodeSyntax flags
- .|. unboxedTuplesBit `setBitIf` xopt Opt_UnboxedTuples flags
+ bitmap = genericsBit `setBitIf` xopt Opt_Generics flags
+ .|. ffiBit `setBitIf` xopt Opt_ForeignFunctionInterface flags
+ .|. parrBit `setBitIf` xopt Opt_ParallelArrays flags
+ .|. arrowsBit `setBitIf` xopt Opt_Arrows flags
+ .|. thBit `setBitIf` xopt Opt_TemplateHaskell flags
+ .|. qqBit `setBitIf` xopt Opt_QuasiQuotes flags
+ .|. ipBit `setBitIf` xopt Opt_ImplicitParams flags
+ .|. explicitForallBit `setBitIf` xopt Opt_ExplicitForAll flags
+ .|. bangPatBit `setBitIf` xopt Opt_BangPatterns flags
+ .|. tyFamBit `setBitIf` xopt Opt_TypeFamilies flags
+ .|. haddockBit `setBitIf` dopt Opt_Haddock flags
+ .|. magicHashBit `setBitIf` xopt Opt_MagicHash flags
+ .|. kindSigsBit `setBitIf` xopt Opt_KindSignatures flags
+ .|. recursiveDoBit `setBitIf` xopt Opt_RecursiveDo flags
+ .|. recBit `setBitIf` xopt Opt_DoRec flags
+ .|. recBit `setBitIf` xopt Opt_Arrows flags
+ .|. unicodeSyntaxBit `setBitIf` xopt Opt_UnicodeSyntax flags
+ .|. unboxedTuplesBit `setBitIf` xopt Opt_UnboxedTuples flags
.|. datatypeContextsBit `setBitIf` xopt Opt_DatatypeContexts flags
.|. transformComprehensionsBit `setBitIf` xopt Opt_TransformListComp flags
.|. rawTokenStreamBit `setBitIf` dopt Opt_KeepRawTokenStream flags
- .|. newQualOpsBit `setBitIf` xopt Opt_NewQualifiedOperators flags
.|. alternativeLayoutRuleBit `setBitIf` xopt Opt_AlternativeLayoutRule flags
+ .|. relaxedLayoutBit `setBitIf` xopt Opt_RelaxedLayout flags
+ .|. nondecreasingIndentationBit `setBitIf` xopt Opt_NondecreasingIndentation flags
--
setBitIf :: Int -> Bool -> Int
b `setBitIf` cond | cond = bit b
- | otherwise = 0
+ | otherwise = 0
addWarning :: DynFlag -> SrcSpan -> SDoc -> P ()
addWarning option srcspan warning
("generated", token ITgenerated_prag),
("core", token ITcore_prag),
("unpack", token ITunpack_prag),
- ("ann", token ITann_prag)])
+ ("ann", token ITann_prag),
+ ("vectorize", token ITvect_prag)])
twoWordPrags = Map.fromList([("inline conlike", token (ITinline_prag Inline ConLike)),
("notinline conlike", token (ITinline_prag NoInline ConLike)),
("specialize inline", token (ITspec_inline_prag True)),
- ("specialize notinline", token (ITspec_inline_prag False))])
-
+ ("specialize notinline", token (ITspec_inline_prag False)),
+ ("vectorize scalar", token ITvect_scalar_prag)])
dispatch_pragmas :: Map String Action -> Action
dispatch_pragmas prags span buf len = case Map.lookup (clean_pragma (lexemeToString buf len)) prags of
canonical prag' = case prag' of
"noinline" -> "notinline"
"specialise" -> "specialize"
+ "vectorise" -> "vectorize"
"constructorlike" -> "conlike"
_ -> prag'
canon_ws s = unwords (map canonical (words s))
projects / ghc-hetmet.git / blobdiff