import Bag
import ErrUtils
+import Maybe
import Outputable
import StringBuffer
import FastString
import Control.Monad
import Data.Bits
import Data.Char
+import Data.List
+import Data.Map (Map)
+import qualified Data.Map as Map
import Data.Ratio
}
$nl = [\n\r]
$idchar = [$small $large $digit \']
+$pragmachar = [$small $large $digit]
+
$docsym = [\| \^ \* \$]
@varid = $small $idchar*
-- with older versions of GHC which generated these.
<0,option_prags> {
- "{-#" $whitechar* (RULES|rules) / { notFollowedByPragmaChar } { rulePrag }
- "{-#" $whitechar* (INLINE|inline) / { notFollowedByPragmaChar }
- { token (ITinline_prag True) }
- "{-#" $whitechar* (NO(T?)INLINE|no(t?)inline) / { notFollowedByPragmaChar }
- { token (ITinline_prag False) }
- "{-#" $whitechar* (INLINE|inline)
- $whitechar+ (CONLIKE|conlike) / { notFollowedByPragmaChar }
- { token (ITinline_conlike_prag True) }
- "{-#" $whitechar* (NO(T)?INLINE|no(t?)inline)
- $whitechar+ (CONLIKE|constructorlike) / { notFollowedByPragmaChar }
- { token (ITinline_conlike_prag False) }
- "{-#" $whitechar* (SPECIALI[SZ]E|speciali[sz]e) / { notFollowedByPragmaChar }
- { token ITspec_prag }
- "{-#" $whitechar* (SPECIALI[SZ]E|speciali[sz]e)
- $whitechar+ (INLINE|inline) / { notFollowedByPragmaChar }
- { token (ITspec_inline_prag True) }
- "{-#" $whitechar* (SPECIALI[SZ]E|speciali[sz]e)
- $whitechar+ (NO(T?)INLINE|no(t?)inline) / { notFollowedByPragmaChar }
- { token (ITspec_inline_prag False) }
- "{-#" $whitechar* (SOURCE|source) / { notFollowedByPragmaChar }
- { token ITsource_prag }
- "{-#" $whitechar* (WARNING|warning) / { notFollowedByPragmaChar }
- { token ITwarning_prag }
- "{-#" $whitechar* (DEPRECATED|deprecated) / { notFollowedByPragmaChar }
- { token ITdeprecated_prag }
- "{-#" $whitechar* (SCC|scc) / { notFollowedByPragmaChar }
- { token ITscc_prag }
- "{-#" $whitechar* (GENERATED|generated) / { notFollowedByPragmaChar }
- { token ITgenerated_prag }
- "{-#" $whitechar* (CORE|core) / { notFollowedByPragmaChar }
- { token ITcore_prag }
- "{-#" $whitechar* (UNPACK|unpack) / { notFollowedByPragmaChar }
- { token ITunpack_prag }
- "{-#" $whitechar* (ANN|ann) / { notFollowedByPragmaChar }
- { token ITann_prag }
+ "{-#" $whitechar* $pragmachar+
+ $whitechar+ $pragmachar+ / { known_pragma twoWordPrags }
+ { dispatch_pragmas twoWordPrags }
+
+ "{-#" $whitechar* $pragmachar+ / { known_pragma oneWordPrags }
+ { dispatch_pragmas oneWordPrags }
-- We ignore all these pragmas, but don't generate a warning for them
- -- CFILES is a hugs-only thing.
- "{-#" $whitechar* (OPTIONS_(HUGS|hugs|NHC98|nhc98|JHC|jhc|YHC|yhc|CATCH|catch|DERIVE|derive)|CFILES|cfiles|CONTRACT|contract) / { notFollowedByPragmaChar }
- { nested_comment lexToken }
+ "{-#" $whitechar* $pragmachar+ / { known_pragma ignoredPrags }
+ { dispatch_pragmas ignoredPrags }
-- ToDo: should only be valid inside a pragma:
"#-}" { endPrag }
}
<option_prags> {
- "{-#" $whitechar* (OPTIONS|options) / { notFollowedByPragmaChar }
- { lex_string_prag IToptions_prag }
- "{-#" $whitechar* (OPTIONS_GHC|options_ghc) / { notFollowedByPragmaChar }
- { lex_string_prag IToptions_prag }
- "{-#" $whitechar* (OPTIONS_HADDOCK|options_haddock)
- / { notFollowedByPragmaChar }
- { lex_string_prag ITdocOptions }
+ "{-#" $whitechar* $pragmachar+ / { known_pragma fileHeaderPrags }
+ { dispatch_pragmas fileHeaderPrags }
+
"-- #" { multiline_doc_comment }
- "{-#" $whitechar* (LANGUAGE|language) / { notFollowedByPragmaChar }
- { token ITlanguage_prag }
- "{-#" $whitechar* (INCLUDE|include) / { notFollowedByPragmaChar }
- { lex_string_prag ITinclude_prag }
}
<0> {
-- In the "0" mode we ignore these pragmas
- "{-#" $whitechar* (OPTIONS|options|OPTIONS_GHC|options_ghc|OPTIONS_HADDOCK|options_haddock|LANGUAGE|language|INCLUDE|include) / { notFollowedByPragmaChar }
+ "{-#" $whitechar* $pragmachar+ / { known_pragma fileHeaderPrags }
{ nested_comment lexToken }
}
| c <= '\x06' = non_graphic
| c <= '\x7f' = c
-- Alex doesn't handle Unicode, so when Unicode
- -- character is encoutered we output these values
+ -- character is encountered we output these values
-- with the actual character value hidden in the state.
| otherwise =
case generalCategory c of
case ltok of
L _ ITeof -> return []
_ -> liftM (ltok:) go
+
+fileHeaderPrags = Map.fromList([("options", lex_string_prag IToptions_prag),
+ ("options_ghc", lex_string_prag IToptions_prag),
+ ("options_haddock", lex_string_prag ITdocOptions),
+ ("language", token ITlanguage_prag),
+ ("include", lex_string_prag ITinclude_prag)])
+
+ignoredPrags = Map.fromList (map ignored pragmas)
+ where ignored opt = (opt, nested_comment lexToken)
+ impls = ["hugs", "nhc98", "jhc", "yhc", "catch", "derive"]
+ options_pragmas = map ("options_" ++) impls
+ -- CFILES is a hugs-only thing.
+ pragmas = options_pragmas ++ ["cfiles", "contract"]
+
+oneWordPrags = Map.fromList([("rules", rulePrag),
+ ("inline", token (ITinline_prag True)),
+ ("notinline", token (ITinline_prag False)),
+ ("specialize", token ITspec_prag),
+ ("source", token ITsource_prag),
+ ("warning", token ITwarning_prag),
+ ("deprecated", token ITdeprecated_prag),
+ ("scc", token ITscc_prag),
+ ("generated", token ITgenerated_prag),
+ ("core", token ITcore_prag),
+ ("unpack", token ITunpack_prag),
+ ("ann", token ITann_prag)])
+
+twoWordPrags = Map.fromList([("inline conlike", token (ITinline_conlike_prag True)),
+ ("notinline conlike", token (ITinline_conlike_prag False)),
+ ("specialize inline", token (ITspec_inline_prag True)),
+ ("specialize notinline", token (ITspec_inline_prag False))])
+
+
+dispatch_pragmas :: Map String Action -> Action
+dispatch_pragmas prags span buf len = case Map.lookup (clean_pragma (lexemeToString buf len)) prags of
+ Just found -> found span buf len
+ Nothing -> lexError "unknown pragma"
+
+known_pragma :: Map String Action -> AlexAccPred Int
+known_pragma prags q r len (AI s t buf) = (isJust $ Map.lookup (clean_pragma (lexemeToString (offsetBytes (- len) buf) len)) prags)
+ && (notFollowedByPragmaChar q r len (AI s t buf))
+
+clean_pragma :: String -> String
+clean_pragma prag = canon_ws (map toLower (unprefix prag))
+ where unprefix prag' = (case stripPrefix "{-#" prag' of
+ Just rest -> rest
+ Nothing -> prag')
+ canonical prag' = case prag' of
+ "noinline" -> "notinline"
+ "specialise" -> "specialize"
+ "constructorlike" -> "conlike"
+ otherwise -> prag'
+ canon_ws s = unwords (map canonical (words s))
}