X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=compiler%2Fmain%2FHeaderInfo.hs;h=a88563c35506e37cd0ed5ec370f4454921afa440;hb=eb0e20bd2c73df8c6e2eb05f6545ced2e9b91b75;hp=48eda2245249c82ef151aedce3e48da26ac2d157;hpb=190f24892156953d73b55401d0467a6f1a88ce5d;p=ghc-hetmet.git diff --git a/compiler/main/HeaderInfo.hs b/compiler/main/HeaderInfo.hs index 48eda22..a88563c 100644 --- a/compiler/main/HeaderInfo.hs +++ b/compiler/main/HeaderInfo.hs @@ -1,6 +1,6 @@ ----------------------------------------------------------------------------- -- --- Parsing the top of a Haskell source file to get its module name, +-- | Parsing the top of a Haskell source file to get its module name, -- imports and options. -- -- (c) Simon Marlow 2005 @@ -8,91 +8,100 @@ -- ----------------------------------------------------------------------------- -module HeaderInfo ( getImportsFromFile, getImports +module HeaderInfo ( getImports , getOptionsFromFile, getOptions - , optionsErrorMsgs ) where + , optionsErrorMsgs, + checkProcessArgsResult ) where #include "HsVersions.h" +import HscTypes 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 Bag ( emptyBag, listToBag ) - -import Distribution.Compiler - -import EXCEPTION ( throwDyn ) -import IO -import 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 - -> IO ([Located ModuleName], [Located ModuleName], Located ModuleName) -getImports dflags buf filename = do +import Maybes +import Bag ( emptyBag, listToBag, unitBag ) + +import MonadUtils ( MonadIO ) +import Exception +import Control.Monad +import System.IO +import Data.List + +------------------------------------------------------------------------------ + +-- | Parse the imports of a source file. +-- +-- Throws a 'SourceError' if parsing fails. +getImports :: GhcMonad m => + DynFlags + -> StringBuffer -- ^ Parse this. + -> FilePath -- ^ Filename the buffer came from. Used for + -- reporting parse error locations. + -> FilePath -- ^ The original source filename (used for locations + -- in the function result) + -> m ([Located ModuleName], [Located ModuleName], Located ModuleName) + -- ^ The source imports, normal imports, and the module name. +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 -> + PFailed span err -> parseError span err + POk pst rdr_module -> do + let ms@(warns, errs) = getMessages pst + logWarnings warns + if errorsFound dflags ms + then liftIO $ throwIO $ mkSrcErr errs + else 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 - (src_idecls, ord_idecls) = partition isSourceIdecl (map unLoc imps) - source_imps = map getImpMod src_idecls + main_loc = mkSrcLoc (mkFastString source_filename) 1 0 + mod = mb_mod `orElse` L (srcLocSpan main_loc) mAIN_NAME + imps' = filter isHomeImp (map unLoc imps) + (src_idecls, ord_idecls) = partition isSourceIdecl 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 span err = throwDyn $ mkPlainErrMsg span err +parseError :: GhcMonad m => SrcSpan -> Message -> m a +parseError span err = throwOneError $ mkPlainErrMsg span err -isSourceIdecl (ImportDecl _ s _ _ _) = s +-- we aren't interested in package imports here, filter them out +isHomeImp :: ImportDecl name -> Bool +isHomeImp (ImportDecl _ (Just p) _ _ _ _) = p == fsLit "this" +isHomeImp (ImportDecl _ Nothing _ _ _ _) = True -getImpMod (ImportDecl located_mod _ _ _ _) = located_mod +isSourceIdecl :: ImportDecl name -> Bool +isSourceIdecl (ImportDecl _ _ s _ _ _) = s + +getImpMod :: ImportDecl name -> Located ModuleName +getImpMod (ImportDecl located_mod _ _ _ _ _) = located_mod -------------------------------------------------------------- -- Get options -------------------------------------------------------------- -getOptionsFromFile :: FilePath -- input file +getOptionsFromFile :: DynFlags + -> FilePath -- input file -> IO [Located String] -- options, if any -getOptionsFromFile filename - = bracket (openBinaryFile filename ReadMode) +getOptionsFromFile dflags filename + = Exception.bracket + (openBinaryFile filename ReadMode) (hClose) (\handle -> do buf <- hGetStringBufferBlock handle blockSize @@ -101,7 +110,7 @@ getOptionsFromFile filename 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 @@ -110,26 +119,27 @@ getOptionsFromFile filename 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) @@ -144,6 +154,15 @@ getOptions' buf filename , 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 @@ -159,37 +178,59 @@ getOptions' buf filename 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 + [] -> panic "getOptions'.parseLanguage(1) went past eof token" parseLanguage (tok:_) = languagePragParseError (getLoc tok) + parseLanguage [] + = panic "getOptions'.parseLanguage(2) went past eof token" 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 :: MonadIO m => [Located String] -> m () +checkProcessArgsResult flags + = when (notNull flags) $ + liftIO $ throwIO $ mkSrcErr $ listToBag $ map mkMsg flags + where mkMsg (L loc flag) + = mkPlainErrMsg loc $ + (text "unknown flag in {-# OPTIONS #-} pragma:" <+> + text flag) + +----------------------------------------------------------------------------- + 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"))) + throw $ mkSrcErr $ unitBag $ + (mkPlainErrMsg 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))) + throw $ mkSrcErr $ unitBag $ + mkPlainErrMsg loc $ + text "unsupported extension: " <> 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' ]