{
module Lexer (
- Token(..), Token__(..), lexer, ExtFlags(..), mkPState, showPFailed,
+ Token(..), Token__(..), lexer, mkPState, showPFailed,
P(..), ParseResult(..), setSrcLocFor, getSrcLoc,
failMsgP, failLocMsgP, srcParseFail,
popContext, pushCurrentContext,
import FastTypes
import SrcLoc
import UniqFM
+import CmdLineOpts
import Ctype
import Util ( maybePrefixMatch )
<bol> {
\n ;
^\# (line)? { begin line_prag1 }
+ ^\# pragma .* \n ; -- GCC 3.3 CPP generated, apparently
() { do_bol }
}
-- "special" symbols
+<0,glaexts> {
+ "[:" / { ifExtension parrEnabled } { token ITopabrack }
+ ":]" / { ifExtension parrEnabled } { token ITcpabrack }
+}
+
+<0,glaexts> {
+ "[|" / { ifExtension thEnabled } { token ITopenExpQuote }
+ "[e|" / { ifExtension thEnabled } { token ITopenExpQuote }
+ "[p|" / { ifExtension thEnabled } { token ITopenPatQuote }
+ "[d|" / { ifExtension thEnabled } { layout_token ITopenDecQuote }
+ "[t|" / { ifExtension thEnabled } { token ITopenTypQuote }
+ "|]" / { ifExtension thEnabled } { token ITcloseQuote }
+ \$ @varid / { ifExtension thEnabled } { skip_one_varid ITidEscape }
+ "$(" / { ifExtension thEnabled } { token ITparenEscape }
+}
+
+<0,glaexts> {
+ "(|" / { ifExtension arrowsEnabled } { special IToparenbar }
+ "|)" / { ifExtension arrowsEnabled } { special ITcparenbar }
+}
+
+<0,glaexts> {
+ \? @varid / { ifExtension ipEnabled } { skip_one_varid ITdupipvarid }
+ \% @varid / { ifExtension ipEnabled } { skip_one_varid ITsplitipvarid }
+}
+
<glaexts> {
"(#" { token IToubxparen }
"#)" { token ITcubxparen }
-
- "[:" { token ITopabrack }
- ":]" { token ITcpabrack }
-
"{|" { token ITocurlybar }
"|}" { token ITccurlybar }
-
- "[|" { token ITopenExpQuote }
- "[e|" { token ITopenExpQuote }
- "[p|" { token ITopenPatQuote }
- "[d|" { layout_token ITopenDecQuote }
- "[t|" { token ITopenTypQuote }
- "|]" { token ITcloseQuote }
}
<0,glaexts> {
- "(|" / { \b _ _ _ -> arrowsEnabled b} { special IToparenbar }
- "|)" / { \b _ _ _ -> arrowsEnabled b} { special ITcparenbar }
\( { special IToparen }
\) { special ITcparen }
\[ { special ITobrack }
\} { close_brace }
}
-<glaexts> {
- \? @varid { skip_one_varid ITdupipvarid }
- \% @varid { skip_one_varid ITsplitipvarid }
- \$ @varid { skip_one_varid ITidEscape }
- "$(" { token ITparenEscape }
-}
-
<0,glaexts> {
@qual @varid { check_qvarid }
@qual @conid { idtoken qconid }
<glaexts> {
@qual @varid "#"+ { idtoken qvarid }
- @qual (@conid "#"+ | "()") { idtoken qconid }
+ @qual @conid "#"+ { idtoken qconid }
@varid "#"+ { varid }
@conid "#"+ { idtoken conid }
}
\" { lex_string_tok }
}
-<glaexts> "``" (([$graphic $whitechar] # \') | \' ([$graphic $whitechar] # \'))*
- "''" { clitlit }
-
{
-- work around bug in Alex 2.0
#if __GLASGOW_HASKELL__ < 503
| ITsafe
| ITthreadsafe
| ITunsafe
- | ITwith
| ITstdcallconv
| ITccallconv
| ITdotnet
- | ITccall (Bool,Bool,Safety) -- (is_dyn, is_casm, may_gc)
| ITmdo
| ITspecialise_prag -- Pragmas
| ITprimint Integer
| ITprimfloat Rational
| ITprimdouble Rational
- | ITlitlit FastString
-- MetaHaskell extension tokens
| ITopenExpQuote -- [| or [e|
isSpecial ITsafe = True
isSpecial ITthreadsafe = True
isSpecial ITunsafe = True
-isSpecial ITwith = True
isSpecial ITccallconv = True
isSpecial ITstdcallconv = True
isSpecial ITmdo = True
( "forall", ITforall, bit glaExtsBit),
( "mdo", ITmdo, bit glaExtsBit),
- ( "reifyDecl", ITreifyDecl, bit glaExtsBit),
- ( "reifyType", ITreifyType, bit glaExtsBit),
- ( "reifyFixity",ITreifyFixity, bit glaExtsBit),
+ ( "reifyDecl", ITreifyDecl, bit thBit),
+ ( "reifyType", ITreifyType, bit thBit),
+ ( "reifyFixity",ITreifyFixity, bit thBit),
( "foreign", ITforeign, bit ffiBit),
( "export", ITexport, bit ffiBit),
( "ccall", ITccallconv, bit ffiBit),
( "dotnet", ITdotnet, bit ffiBit),
- ( "with", ITwith, bit withBit),
-
( "rec", ITrec, bit arrowsBit),
- ( "proc", ITproc, bit arrowsBit),
-
- -- On death row
- ("_ccall_", ITccall (False, False, PlayRisky),
- bit glaExtsBit),
- ("_ccall_GC_", ITccall (False, False, PlaySafe False),
- bit glaExtsBit),
- ("_casm_", ITccall (False, True, PlayRisky),
- bit glaExtsBit),
- ("_casm_GC_", ITccall (False, True, PlaySafe False),
- bit glaExtsBit)
+ ( "proc", ITproc, bit arrowsBit)
]
reservedSymsFM = listToUFM $
notFollowedBy char _ _ _ (_,buf) = atEnd buf || currentChar buf /= char
+ifExtension pred bits _ _ _ = pred bits
+
{-
nested comments require traversing by hand, they can't be parsed
using regular expressions.
where go i x | i == len = x
| otherwise = go (i+1) (x * radix + toInteger (to_int (lookAhead buf i)))
-clitlit :: Action
-clitlit loc end buf len =
- return (T loc end (ITlitlit $! lexemeToFastString (stepOnBy 2 buf) (len-4)))
-
-- -----------------------------------------------------------------------------
-- Layout processing
glaExtsBit = 0
ffiBit = 1
parrBit = 2
-withBit = 3
arrowsBit = 4
+thBit = 5
+ipBit = 6
glaExtsEnabled, ffiEnabled, parrEnabled :: Int -> Bool
glaExtsEnabled flags = testBit flags glaExtsBit
ffiEnabled flags = testBit flags ffiBit
-withEnabled flags = testBit flags withBit
parrEnabled flags = testBit flags parrBit
arrowsEnabled flags = testBit flags arrowsBit
-
--- convenient record-based bitmap for the interface to the rest of the world
---
--- NB: `glasgowExtsEF' implies `ffiEF' (see `mkPState' below)
---
-data ExtFlags = ExtFlags {
- glasgowExtsEF :: Bool,
- ffiEF :: Bool,
- withEF :: Bool,
- parrEF :: Bool,
- arrowsEF :: Bool
- }
+thEnabled flags = testBit flags thBit
+ipEnabled flags = testBit flags ipBit
-- create a parse state
--
-mkPState :: StringBuffer -> SrcLoc -> ExtFlags -> PState
-mkPState buf loc exts =
+mkPState :: StringBuffer -> SrcLoc -> DynFlags -> PState
+mkPState buf loc flags =
PState {
buffer = buf,
last_loc = loc,
-- we begin in the layout state if toplev_layout is set
}
where
- bitmap = glaExtsBit `setBitIf` glasgowExtsEF exts
- .|. ffiBit `setBitIf` (ffiEF exts
- || glasgowExtsEF exts)
- .|. withBit `setBitIf` withEF exts
- .|. parrBit `setBitIf` parrEF exts
- .|. arrowsBit `setBitIf` arrowsEF exts
+ bitmap = glaExtsBit `setBitIf` dopt Opt_GlasgowExts flags
+ .|. ffiBit `setBitIf` dopt Opt_FFI flags
+ .|. parrBit `setBitIf` dopt Opt_PArr flags
+ .|. arrowsBit `setBitIf` dopt Opt_Arrows flags
+ .|. thBit `setBitIf` dopt Opt_TH flags
+ .|. ipBit `setBitIf` dopt Opt_ImplicitParams flags
--
setBitIf :: Int -> Bool -> Int
b `setBitIf` cond | cond = bit b
projects / ghc-hetmet.git / blobdiff