+{-# OPTIONS -fno-warn-incomplete-patterns #-}
+-- 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
+-- http://hackage.haskell.org/trac/ghc/wiki/Commentary/CodingStyle#Warnings
+-- for details
+
-----------------------------------------------------------------------------
--
-- Parsing the top of a Haskell source file to get its module name,
--
-----------------------------------------------------------------------------
-module HeaderInfo ( getImportsFromFile, getImports
+module HeaderInfo ( getImports
, getOptionsFromFile, getOptions
- , optionsErrorMsgs ) where
+ , optionsErrorMsgs,
+ checkProcessArgsResult ) where
#include "HsVersions.h"
import Parser ( parseHeader )
-import Lexer ( P(..), ParseResult(..), mkPState, pragState
- , lexer, Token(..), PState(..) )
+import Lexer
import FastString
import HsSyn ( ImportDecl(..), HsModule(..) )
import Module ( ModuleName, moduleName )
import PrelNames ( gHC_PRIM, mAIN_NAME )
-import StringBuffer ( StringBuffer(..), hGetStringBuffer, hGetStringBufferBlock
+import StringBuffer ( StringBuffer(..), hGetStringBufferBlock
, appendStringBuffers )
-import SrcLoc ( Located(..), mkSrcLoc, unLoc, noSrcSpan )
-import FastString ( mkFastString )
-import DynFlags ( DynFlags )
+import SrcLoc
+import DynFlags
import ErrUtils
import Util
import Outputable
import Pretty ()
import Panic
+import Maybes
import Bag ( emptyBag, listToBag )
-import Distribution.Compiler
-
import Control.Exception
+import Control.Monad
+import System.Exit
import System.IO
import Data.List
-#if __GLASGOW_HASKELL__ >= 601
-import System.IO ( openBinaryFile )
-#else
-import IOExts ( openFileEx, IOModeEx(..) )
-#endif
-
-#if __GLASGOW_HASKELL__ < 601
-openBinaryFile fp mode = openFileEx fp (BinaryMode mode)
-#endif
-
--- getImportsFromFile is careful to close the file afterwards, otherwise
--- we can end up with a large number of open handles before the garbage
--- collector gets around to closing them.
-getImportsFromFile :: DynFlags -> FilePath
- -> IO ([Located ModuleName], [Located ModuleName], Located ModuleName)
-getImportsFromFile dflags filename = do
- buf <- hGetStringBuffer filename
- getImports dflags buf filename
-
-getImports :: DynFlags -> StringBuffer -> FilePath
+getImports :: DynFlags -> StringBuffer -> FilePath -> FilePath
-> IO ([Located ModuleName], [Located ModuleName], Located ModuleName)
-getImports dflags buf filename = do
+getImports dflags buf filename source_filename = do
let loc = mkSrcLoc (mkFastString filename) 1 0
case unP parseHeader (mkPState buf loc dflags) of
PFailed span err -> parseError span err
- POk _ rdr_module ->
+ POk pst rdr_module -> do
+ let ms = getMessages pst
+ printErrorsAndWarnings dflags ms
+ when (errorsFound dflags ms) $ exitWith (ExitFailure 1)
case rdr_module of
- L _ (HsModule mod _ imps _ _ _ _ _) ->
+ L _ (HsModule mb_mod _ imps _ _ _ _) ->
let
- mod_name | Just located_mod <- mod = located_mod
- | otherwise = L noSrcSpan mAIN_NAME
+ main_loc = mkSrcLoc (mkFastString source_filename) 1 0
+ mod = mb_mod `orElse` L (srcLocSpan main_loc) mAIN_NAME
(src_idecls, ord_idecls) = partition isSourceIdecl (map unLoc imps)
source_imps = map getImpMod src_idecls
ordinary_imps = filter ((/= moduleName gHC_PRIM) . unLoc)
(map getImpMod ord_idecls)
-- GHC.Prim doesn't exist physically, so don't go looking for it.
in
- return (source_imps, ordinary_imps, mod_name)
+ return (source_imps, ordinary_imps, mod)
+parseError :: SrcSpan -> Message -> a
parseError span err = throwDyn $ mkPlainErrMsg span err
+isSourceIdecl :: ImportDecl name -> Bool
isSourceIdecl (ImportDecl _ s _ _ _) = s
+getImpMod :: ImportDecl name -> Located ModuleName
getImpMod (ImportDecl located_mod _ _ _ _) = located_mod
--------------------------------------------------------------
--------------------------------------------------------------
-getOptionsFromFile :: FilePath -- input file
+getOptionsFromFile :: DynFlags
+ -> FilePath -- input file
-> IO [Located String] -- options, if any
-getOptionsFromFile filename
- = System.IO.bracket
+getOptionsFromFile dflags filename
+ = Control.Exception.bracket
(openBinaryFile filename ReadMode)
(hClose)
(\handle ->
loop handle buf
| len buf == 0 = return []
| otherwise
- = case getOptions' buf filename of
+ = case getOptions' dflags buf filename of
(Nothing, opts) -> return opts
(Just buf', opts) -> do nextBlock <- hGetStringBufferBlock handle blockSize
newBuf <- appendStringBuffers buf' nextBlock
else do opts' <- loop handle newBuf
return (opts++opts')
-getOptions :: StringBuffer -> FilePath -> [Located String]
-getOptions buf filename
- = case getOptions' buf filename of
+getOptions :: DynFlags -> StringBuffer -> FilePath -> [Located String]
+getOptions dflags buf filename
+ = case getOptions' dflags buf filename of
(_,opts) -> opts
-- The token parser is written manually because Happy can't
-- return a partial result when it encounters a lexer error.
-- We want to extract options before the buffer is passed through
-- CPP, so we can't use the same trick as 'getImports'.
-getOptions' :: StringBuffer -- Input buffer
+getOptions' :: DynFlags
+ -> StringBuffer -- Input buffer
-> FilePath -- Source file. Used for msgs only.
-> ( Maybe StringBuffer -- Just => we can use more input
, [Located String] -- Options.
)
-getOptions' buf filename
- = parseToks (lexAll (pragState buf loc))
+getOptions' dflags buf filename
+ = parseToks (lexAll (pragState dflags buf loc))
where loc = mkSrcLoc (mkFastString filename) 1 0
- getToken (buf,L _loc tok) = tok
- getLoc (buf,L loc _tok) = loc
+ getToken (_buf,L _loc tok) = tok
+ getLoc (_buf,L loc _tok) = loc
getBuf (buf,_tok) = buf
combine opts (flag, opts') = (flag, opts++opts')
add opt (flag, opts) = (flag, opt:opts)
, ITclose_prag <- getToken close
= map (L (getLoc open)) ["-#include",removeSpaces str] `combine`
parseToks xs
+ parseToks (open:close:xs)
+ | ITdocOptions str <- getToken open
+ , ITclose_prag <- getToken close
+ = map (L (getLoc open)) ["-haddock-opts", removeSpaces str]
+ `combine` parseToks xs
+ parseToks (open:xs)
+ | ITdocOptionsOld str <- getToken open
+ = map (L (getLoc open)) ["-haddock-opts", removeSpaces str]
+ `combine` parseToks xs
parseToks (open:xs)
| ITlanguage_prag <- getToken open
= parseLanguage xs
parseLanguage ((_buf,L loc (ITconid fs)):rest)
= checkExtension (L loc fs) `add`
case rest of
- (_,L loc ITcomma):more -> parseLanguage more
- (_,L loc ITclose_prag):more -> parseToks more
+ (_,L _loc ITcomma):more -> parseLanguage more
+ (_,L _loc ITclose_prag):more -> parseToks more
(_,L loc _):_ -> languagePragParseError loc
parseLanguage (tok:_)
= languagePragParseError (getLoc tok)
lexToken t = return t
lexAll state = case unP (lexer lexToken) state of
- POk state' t@(L _ ITeof) -> [(buffer state,t)]
+ POk _ t@(L _ ITeof) -> [(buffer state,t)]
POk state' t -> (buffer state,t):lexAll state'
_ -> [(buffer state,L (last_loc state) ITeof)]
+-----------------------------------------------------------------------------
+-- Complain about non-dynamic flags in OPTIONS pragmas
+
+checkProcessArgsResult :: [String] -> FilePath -> IO ()
+checkProcessArgsResult flags filename
+ = do when (notNull flags) (throwDyn (ProgramError (
+ showSDoc (hang (text filename <> char ':')
+ 4 (text "unknown flags in {-# OPTIONS #-} pragma:" <+>
+ hsep (map text flags)))
+ )))
+
+-----------------------------------------------------------------------------
+
checkExtension :: Located FastString -> Located String
checkExtension (L l ext)
- = case reads (unpackFS ext) of
- [] -> languagePragParseError l
- (okExt,""):_ -> case extensionsToGHCFlag [okExt] of
- ([],[opt]) -> L l opt
- _ -> unsupportedExtnError l okExt
-
+-- Checks if a given extension is valid, and if so returns
+-- its corresponding flag. Otherwise it throws an exception.
+ = let ext' = unpackFS ext in
+ if ext' `elem` supportedLanguages
+ || ext' `elem` (map ("No"++) supportedLanguages)
+ then L l ("-X"++ext')
+ else unsupportedExtnError l ext'
+
+languagePragParseError :: SrcSpan -> a
languagePragParseError loc =
- pgmError (showSDoc (mkLocMessage loc (
- text "cannot parse LANGUAGE pragma")))
+ pgmError
+ (showSDoc (mkLocMessage loc (
+ text "cannot parse LANGUAGE pragma: comma-separated list expected")))
+unsupportedExtnError :: SrcSpan -> String -> a
unsupportedExtnError loc unsup =
pgmError (showSDoc (mkLocMessage loc (
text "unsupported extension: " <>
- (text.show) unsup)))
+ text unsup)))
optionsErrorMsgs :: [String] -> [Located String] -> FilePath -> Messages
-optionsErrorMsgs unhandled_flags flags_lines filename
+optionsErrorMsgs unhandled_flags flags_lines _filename
= (emptyBag, listToBag (map mkMsg unhandled_flags_lines))
where unhandled_flags_lines = [ L l f | f <- unhandled_flags,
L l f' <- flags_lines, f == f' ]
projects / ghc-hetmet.git / blobdiff